/* ============================================================
   ACKAIA CORPORATION — styles.css
   Design System: Carbon-based Precision Industrial
   Palette: Monochromatic Black & White
   Typography: IBM Plex Sans + IBM Plex Mono
   ============================================================ */

/* ------------------------------------------------------------
   1. DESIGN TOKENS
   ------------------------------------------------------------ */

:root {
  /* Color */
  --color-black:       #000000;
  --color-gray-100:    #161616;
  --color-gray-90:     #262626;
  --color-gray-80:     #393939;
  --color-gray-70:     #525252;
  --color-gray-50:     #8d8d8d;
  --color-gray-30:     #c6c6c6;
  --color-gray-20:     #e0e0e0;
  --color-gray-10:     #f4f4f4;
  --color-gray-05:     #fafafa;
  --color-white:       #ffffff;

  /* Typography */
  --font-sans:         'IBM Plex Sans', sans-serif;
  --font-mono:         'IBM Plex Mono', monospace;

  /* Type Scale (Carbon-aligned) */
  --type-xs:           0.75rem;    /* 12px */
  --type-sm:           0.875rem;   /* 14px */
  --type-base:         1rem;       /* 16px */
  --type-lg:           1.125rem;   /* 18px */
  --type-xl:           1.25rem;    /* 20px */
  --type-2xl:          1.5rem;     /* 24px */
  --type-3xl:          2rem;       /* 32px */
  --type-4xl:          2.625rem;   /* 42px */
  --type-5xl:          3.375rem;   /* 54px */
  --type-6xl:          4.25rem;    /* 68px */

  /* Spacing (8px grid) */
  --space-1:  0.25rem;   /* 4px */
  --space-2:  0.5rem;    /* 8px */
  --space-3:  0.75rem;   /* 12px */
  --space-4:  1rem;      /* 16px */
  --space-5:  1.25rem;   /* 20px */
  --space-6:  1.5rem;    /* 24px */
  --space-8:  2rem;      /* 32px */
  --space-10: 2.5rem;    /* 40px */
  --space-12: 3rem;      /* 48px */
  --space-16: 4rem;      /* 64px */
  --space-20: 5rem;      /* 80px */
  --space-24: 6rem;      /* 96px */
  --space-32: 8rem;      /* 128px */

  /* Layout */
  --max-width:      1440px;
  --nav-height:     64px;
  --page-padding:   3rem;
  --grid-gap:       2rem;

  /* Borders */
  --border-thin:    1px solid var(--color-gray-20);
  --border-medium:  1px solid var(--color-gray-80);
  --border-thick:   2px solid var(--color-black);

  /* Shadows */
  --shadow-sm:   0 1px 4px rgba(0,0,0,0.06);
  --shadow-md:   0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg:   0 8px 32px rgba(0,0,0,0.14);
  --shadow-xl:   0 16px 48px rgba(0,0,0,0.18);

  /* Motion */
  --ease-standard: cubic-bezier(0.2, 0, 0.38, 0.9);
  --ease-enter:    cubic-bezier(0, 0, 0.38, 0.9);
  --ease-exit:     cubic-bezier(0.2, 0, 1, 0.9);
  --duration-fast:   100ms;
  --duration-base:   200ms;
  --duration-slow:   300ms;
  --duration-slower: 500ms;
}


/* ------------------------------------------------------------
   2. RESET & BASE
   ------------------------------------------------------------ */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  background: var(--color-white);
  color: var(--color-gray-100);
  line-height: 1.6;
  overflow-x: hidden;
}

img, svg {
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

address {
  font-style: normal;
}


/* ------------------------------------------------------------
   3. UTILITIES
   ------------------------------------------------------------ */

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--page-padding);
}

.label {
  font-size: var(--type-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gray-50);
}

.divider {
  width: 40px;
  height: 2px;
  background: var(--color-black);
  margin-bottom: var(--space-8);
}

/* Fade-in animation */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slower) var(--ease-enter),
              transform var(--duration-slower) var(--ease-enter);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}


/* ------------------------------------------------------------
   4. BUTTONS
   ------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.875rem 1.75rem;
  font-family: var(--font-sans);
  font-size: var(--type-sm);
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition:
    background var(--duration-base) var(--ease-standard),
    color var(--duration-base) var(--ease-standard),
    border-color var(--duration-base) var(--ease-standard),
    transform var(--duration-base) var(--ease-standard),
    box-shadow var(--duration-base) var(--ease-standard);
  position: relative;
  white-space: nowrap;
}

.btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform var(--duration-base) var(--ease-standard);
}

.btn:hover svg {
  transform: translateX(4px);
}

/* Primary */
.btn-primary {
  background: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
}

.btn-primary:hover {
  background: var(--color-gray-100);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

/* Secondary */
.btn-secondary {
  background: transparent;
  color: var(--color-black);
  border-color: var(--color-black);
}

.btn-secondary:hover {
  background: var(--color-black);
  color: var(--color-white);
}

/* Ghost on dark bg */
.btn-white {
  background: var(--color-white);
  color: var(--color-black);
  border-color: var(--color-white);
}

.btn-white:hover {
  background: var(--color-gray-10);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.5);
}

.btn-outline:hover {
  background: var(--color-white);
  color: var(--color-black);
  border-color: var(--color-white);
}

/* Size: small */
.btn-sm {
  padding: 0.625rem 1.25rem;
  font-size: var(--type-xs);
}


/* ------------------------------------------------------------
   5. NAVIGATION
   ------------------------------------------------------------ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--color-white);
  border-bottom: var(--border-thin);
  z-index: 100;
  transition: box-shadow var(--duration-slow) var(--ease-standard);
}

.nav.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--page-padding);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Logo */
.nav__logo {
  height: 68px;
  width: auto;
  flex-shrink: 0;
}

.nav__logo-fallback {
  display: none;
  font-size: var(--type-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--color-black);
}

/* Nav items */
.nav__links {
  display: flex;
  align-items: center;
  gap: 0;
  height: 100%;
}

.nav__item {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.nav__link {
  display: flex;
  align-items: center;
  height: var(--nav-height);
  padding: 0 var(--space-5);
  font-size: var(--type-sm);
  font-weight: 400;
  color: var(--color-gray-100);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition:
    color var(--duration-base) var(--ease-standard),
    border-color var(--duration-base) var(--ease-standard);
  white-space: nowrap;
}

.nav__link:hover {
  color: var(--color-black);
  border-bottom-color: var(--color-black);
}

/* CTA button in nav */
.nav__cta {
  margin-left: var(--space-4);
  height: auto !important;
  padding: 0.625rem 1.25rem !important;
  border-bottom: none !important;
  white-space: nowrap;
  color: var(--color-white) !important;
}

/* Mega menu */
.mega-menu {
  position: absolute;
  top: var(--nav-height);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-white);
  border: var(--border-thin);
  border-top: 2px solid var(--color-black);
  box-shadow: var(--shadow-lg);
  padding: var(--space-12) var(--space-12) var(--space-10);
  min-width: 780px;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity var(--duration-slow) var(--ease-standard),
    visibility var(--duration-slow) var(--ease-standard),
    transform var(--duration-slow) var(--ease-standard);
  transform: translateX(-50%) translateY(-8px);
}

.nav__item:hover .mega-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.mega-menu__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-12);
}

.mega-menu__section-title {
  font-size: var(--type-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gray-50);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin);
}

.mega-menu__links {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.mega-menu__link {
  display: flex;
  flex-direction: column;
  padding: var(--space-3) 0;
  font-size: var(--type-sm);
  font-weight: 400;
  color: var(--color-gray-100);
  text-decoration: none;
  border-bottom: var(--border-thin);
  transition:
    color var(--duration-base) var(--ease-standard),
    padding-left var(--duration-base) var(--ease-standard);
}

.mega-menu__link:last-child {
  border-bottom: none;
}

.mega-menu__link:hover {
  color: var(--color-black);
  padding-left: var(--space-2);
}

.mega-menu__link-desc {
  font-size: var(--type-xs);
  color: var(--color-gray-50);
  margin-top: var(--space-1);
  font-weight: 400;
  transition: color var(--duration-base) var(--ease-standard);
}

.mega-menu__link:hover .mega-menu__link-desc {
  color: var(--color-gray-70);
}


/* ------------------------------------------------------------
   6. HERO SECTION
   ------------------------------------------------------------ */

.hero {
  padding-top: calc(var(--nav-height) + var(--space-24));
  padding-bottom: var(--space-32);
  padding-left: var(--page-padding);
  padding-right: var(--page-padding);
  background: var(--color-white);
  position: relative;
  overflow: hidden;
}

/* Subtle grid texture */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-gray-20) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-gray-20) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.4;
  pointer-events: none;
  mask-image: linear-gradient(to bottom, transparent 0%, rgba(0,0,0,0.3) 30%, rgba(0,0,0,0.3) 70%, transparent 100%);
}

.hero__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-24);
  align-items: center;
}

/* Left column */
.hero__eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}

.hero__eyebrow-dot {
  width: 8px;
  height: 8px;
  background: var(--color-black);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}

.hero__tag {
  font-size: var(--type-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gray-50);
}

.hero__title {
  font-size: var(--type-6xl);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--color-black);
  margin-bottom: var(--space-8);
}

.hero__title strong {
  font-weight: 600;
  display: block;
}

.hero__subtitle {
  font-size: var(--type-lg);
  color: var(--color-gray-70);
  line-height: 1.75;
  margin-bottom: var(--space-10);
  max-width: 520px;
}

.hero__cta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero__footnote {
  margin-top: var(--space-8);
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.hero__footnote-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--type-xs);
  color: var(--color-gray-50);
  font-weight: 500;
}

.hero__footnote-item svg {
  width: 14px;
  height: 14px;
}

/* Right column — Stats grid */
.hero__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border: var(--border-thin);
}

.stat-card {
  padding: var(--space-10) var(--space-8);
  border-right: var(--border-thin);
  border-bottom: var(--border-thin);
  background: var(--color-white);
  position: relative;
  overflow: hidden;
  transition:
    background var(--duration-slow) var(--ease-standard),
    box-shadow var(--duration-slow) var(--ease-standard);
}

.stat-card:nth-child(2n) {
  border-right: none;
}

.stat-card:nth-child(3),
.stat-card:nth-child(4) {
  border-bottom: none;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--color-black);
  transform: scaleY(0);
  transform-origin: bottom;
  transition: transform var(--duration-slow) var(--ease-standard);
}

.stat-card:hover {
  background: var(--color-gray-05);
  box-shadow: inset 0 0 0 1px var(--color-gray-80);
}

.stat-card:hover::before {
  transform: scaleY(1);
}

.stat-card__number {
  font-family: var(--font-mono);
  font-size: var(--type-4xl);
  font-weight: 300;
  color: var(--color-black);
  line-height: 1;
  margin-bottom: var(--space-3);
  letter-spacing: -0.02em;
}

.stat-card__label {
  font-size: var(--type-xs);
  font-weight: 500;
  color: var(--color-gray-70);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}


/* ------------------------------------------------------------
   7. TRUST BANNER
   ------------------------------------------------------------ */

.trust-banner {
  padding: var(--space-8) var(--page-padding);
  background: var(--color-gray-05);
  border-top: var(--border-thin);
  border-bottom: var(--border-thin);
}

.trust-banner__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

.trust-banner__label {
  font-size: var(--type-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gray-50);
  white-space: nowrap;
  flex-shrink: 0;
}

.trust-banner__divider {
  width: 1px;
  height: 32px;
  background: var(--color-gray-20);
  flex-shrink: 0;
}

.trust-banner__badges {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  flex-wrap: wrap;
}

.trust-badge {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--type-xs);
  font-weight: 500;
  color: var(--color-gray-70);
  white-space: nowrap;
}

.trust-badge svg {
  width: 16px;
  height: 16px;
  color: var(--color-black);
}


/* ------------------------------------------------------------
   8. LEX NIHIL SECTION
   ------------------------------------------------------------ */

.lex-nihil {
  padding: var(--space-32) var(--page-padding);
  background: var(--color-black);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

/* Large watermark */
.lex-nihil::before {
  content: 'LN';
  position: absolute;
  right: -2rem;
  bottom: -4rem;
  font-family: var(--font-mono);
  font-size: 20rem;
  font-weight: 700;
  color: rgba(255,255,255,0.03);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.05em;
}

.lex-nihil__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-24);
  align-items: center;
  position: relative;
  z-index: 1;
}

.lex-nihil__eyebrow {
  font-size: var(--type-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gray-50);
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.lex-nihil__eyebrow::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--color-gray-50);
}

.lex-nihil__title {
  font-size: var(--type-5xl);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-6);
}

.lex-nihil__title strong {
  font-weight: 600;
}

.lex-nihil__body {
  font-size: var(--type-base);
  color: var(--color-gray-30);
  line-height: 1.75;
  margin-bottom: var(--space-10);
  max-width: 480px;
}

/* Code card */
.lex-nihil__code-card {
  background: var(--color-gray-100);
  border: 1px solid var(--color-gray-80);
  padding: var(--space-8);
  position: relative;
}

.lex-nihil__code-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-white);
}

.code-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-gray-80);
}

.code-card__title {
  font-family: var(--font-mono);
  font-size: var(--type-xs);
  font-weight: 500;
  color: var(--color-gray-50);
  letter-spacing: 0.05em;
}

.code-card__badge {
  font-family: var(--font-mono);
  font-size: var(--type-xs);
  font-weight: 500;
  color: var(--color-black);
  background: var(--color-white);
  padding: 2px 8px;
}

.code-preview {
  font-family: var(--font-mono);
  font-size: var(--type-sm);
  line-height: 1.9;
  color: var(--color-gray-10);
}

.code-comment {
  color: var(--color-gray-50);
}

.code-keyword {
  color: var(--color-white);
  font-weight: 600;
}

.code-value {
  color: var(--color-gray-30);
}

.code-line {
  display: flex;
  gap: var(--space-4);
}

.code-line-num {
  color: var(--color-gray-80);
  user-select: none;
  min-width: 1.5rem;
  text-align: right;
  font-size: var(--type-xs);
}


/* ------------------------------------------------------------
   9. SERVICES SECTION
   ------------------------------------------------------------ */

.services {
  padding: var(--space-32) var(--page-padding);
  background: var(--color-white);
}

.services__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-header {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: end;
  margin-bottom: var(--space-16);
  padding-bottom: var(--space-10);
  border-bottom: var(--border-thin);
}

.section-header__left {
  /* left column */
}

.section-header__eyebrow {
  font-size: var(--type-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gray-50);
  margin-bottom: var(--space-4);
}

.section-header__title {
  font-size: var(--type-4xl);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--color-black);
}

.section-header__title strong {
  font-weight: 600;
}

.section-header__body {
  font-size: var(--type-base);
  color: var(--color-gray-70);
  line-height: 1.75;
  max-width: 480px;
  align-self: end;
}

/* Services grid */
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: var(--border-thin);
}

.service-card {
  padding: var(--space-12) var(--space-10);
  border-right: var(--border-thin);
  background: var(--color-white);
  position: relative;
  overflow: hidden;
  transition:
    background var(--duration-slow) var(--ease-standard);
}

.service-card:last-child {
  border-right: none;
}

.service-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-black);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-slow) var(--ease-standard);
}

.service-card:hover {
  background: var(--color-gray-05);
}

.service-card:hover::after {
  transform: scaleX(1);
}

.service-card__number {
  font-family: var(--font-mono);
  font-size: var(--type-xs);
  font-weight: 500;
  color: var(--color-gray-50);
  margin-bottom: var(--space-8);
  letter-spacing: 0.1em;
}

.service-card__icon {
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-card__icon svg {
  width: 32px;
  height: 32px;
}

.service-card__title {
  font-size: var(--type-xl);
  font-weight: 500;
  color: var(--color-black);
  margin-bottom: var(--space-4);
  letter-spacing: -0.01em;
}

.service-card__body {
  font-size: var(--type-sm);
  color: var(--color-gray-70);
  line-height: 1.75;
  margin-bottom: var(--space-8);
}

.service-card__status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--type-xs);
  font-weight: 500;
  color: var(--color-gray-50);
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-gray-20);
  margin-bottom: var(--space-6);
}

.service-card__status--live {
  color: var(--color-black);
  border-color: var(--color-black);
}

.service-card__status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-gray-30);
}

.service-card__status--live .service-card__status-dot {
  background: var(--color-black);
  animation: pulse 2s ease-in-out infinite;
}

.service-card__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--type-sm);
  font-weight: 500;
  color: var(--color-black);
  text-decoration: none;
  transition: gap var(--duration-base) var(--ease-standard);
}

.service-card__link svg {
  width: 14px;
  height: 14px;
  transition: transform var(--duration-base) var(--ease-standard);
}

.service-card__link:hover {
  gap: var(--space-3);
}

.service-card__link:hover svg {
  transform: translateX(4px);
}


/* ------------------------------------------------------------
   10. FEATURES SECTION
   ------------------------------------------------------------ */

.features {
  padding: var(--space-32) var(--page-padding);
  background: var(--color-gray-05);
  border-top: var(--border-thin);
}

.features__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: var(--border-thin);
  margin-top: var(--space-16);
}

.feature-card {
  padding: var(--space-10) var(--space-8);
  border-right: var(--border-thin);
  border-bottom: var(--border-thin);
  background: var(--color-white);
  transition:
    background var(--duration-slow) var(--ease-standard),
    box-shadow var(--duration-slow) var(--ease-standard);
  position: relative;
}

.feature-card:nth-child(3n) {
  border-right: none;
}

.feature-card:nth-child(4),
.feature-card:nth-child(5),
.feature-card:nth-child(6) {
  border-bottom: none;
}

.feature-card:hover {
  background: var(--color-gray-05);
  z-index: 1;
  box-shadow: inset 0 0 0 1px var(--color-black);
}

.feature-card__icon {
  width: 40px;
  height: 40px;
  border: var(--border-thin);
  background: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  transition: border-color var(--duration-base) var(--ease-standard),
              background var(--duration-base) var(--ease-standard);
}

.feature-card:hover .feature-card__icon {
  background: var(--color-black);
  border-color: var(--color-black);
}

.feature-card__icon svg {
  width: 20px;
  height: 20px;
  transition: filter var(--duration-base) var(--ease-standard);
}

.feature-card:hover .feature-card__icon svg {
  filter: invert(1);
}

.feature-card__title {
  font-size: var(--type-base);
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.feature-card__body {
  font-size: var(--type-sm);
  color: var(--color-gray-70);
  line-height: 1.7;
}


/* ------------------------------------------------------------
   11. CTA SECTION
   ------------------------------------------------------------ */

.cta-section {
  padding: var(--space-32) var(--page-padding);
  background: var(--color-black);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

.cta-section__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-24);
  align-items: center;
  position: relative;
  z-index: 1;
}

.cta-section__eyebrow {
  font-size: var(--type-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gray-50);
  margin-bottom: var(--space-6);
}

.cta-section__title {
  font-size: var(--type-4xl);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: var(--space-4);
}

.cta-section__title strong {
  font-weight: 600;
}

.cta-section__body {
  font-size: var(--type-base);
  color: var(--color-gray-30);
  line-height: 1.75;
  max-width: 560px;
}

.cta-section__actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: flex-start;
  flex-shrink: 0;
}


/* ------------------------------------------------------------
   12. FOOTER
   ------------------------------------------------------------ */

footer {
  background: var(--color-gray-100);
  color: var(--color-gray-10);
}

.footer__top {
  padding: var(--space-32) var(--page-padding) var(--space-16);
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2.5fr 1fr 1fr 1fr 1fr;
  gap: var(--space-16);
  border-bottom: 1px solid var(--color-gray-80);
}

.footer__brand-logo {
  height: 68px;
  width: auto;
  margin-bottom: var(--space-6);
  filter: brightness(0) invert(1);
}

.footer__brand-logo-fallback {
  display: none;
  font-size: var(--type-lg);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-6);
}

.footer__brand-desc {
  font-size: var(--type-sm);
  color: var(--color-gray-30);
  line-height: 1.75;
  margin-bottom: var(--space-8);
  max-width: 300px;
}

.footer__address {
  font-size: var(--type-xs);
  color: var(--color-gray-50);
  line-height: 1.8;
}

.footer__section-title {
  font-size: var(--type-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gray-50);
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-gray-80);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer__link {
  font-size: var(--type-sm);
  color: var(--color-gray-30);
  text-decoration: none;
  transition: color var(--duration-base) var(--ease-standard);
}

.footer__link:hover {
  color: var(--color-white);
}

.footer__bottom {
  padding: var(--space-8) var(--page-padding);
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__copyright {
  font-size: var(--type-xs);
  color: var(--color-gray-50);
}

.footer__legal {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.footer__legal-link {
  font-size: var(--type-xs);
  color: var(--color-gray-50);
  text-decoration: none;
  transition: color var(--duration-base) var(--ease-standard);
}

.footer__legal-link:hover {
  color: var(--color-gray-10);
}


/* ------------------------------------------------------------
   13. SCROLL ANIMATIONS
   ------------------------------------------------------------ */

[data-animate] {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity var(--duration-slower) var(--ease-enter),
    transform var(--duration-slower) var(--ease-enter);
}

[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}

[data-animate-delay="1"] { transition-delay: 100ms; }
[data-animate-delay="2"] { transition-delay: 200ms; }
[data-animate-delay="3"] { transition-delay: 300ms; }
[data-animate-delay="4"] { transition-delay: 400ms; }
[data-animate-delay="5"] { transition-delay: 500ms; }


/* ------------------------------------------------------------
   14. RESPONSIVE — 1200px
   ------------------------------------------------------------ */

@media (max-width: 1200px) {
  :root {
    --page-padding: 2rem;
    --type-6xl: 3.25rem;
    --type-5xl: 2.75rem;
    --type-4xl: 2.25rem;
  }

  .hero__inner {
    grid-template-columns: 1fr;
    gap: var(--space-16);
  }

  .hero__stats {
    max-width: 640px;
  }

  .lex-nihil__inner {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .section-header {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }

  .section-header__body {
    max-width: 100%;
  }

  .services__grid {
    grid-template-columns: 1fr;
  }

  .service-card {
    border-right: none;
    border-bottom: var(--border-thin);
  }

  .service-card:last-child {
    border-bottom: none;
  }

  .service-card::after {
    height: 100%;
    width: 3px;
    transform: scaleY(0);
    transform-origin: top;
  }

  .service-card:hover::after {
    transform: scaleY(1);
  }

  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-card:nth-child(3n) {
    border-right: var(--border-thin);
  }

  .feature-card:nth-child(2n) {
    border-right: none;
  }

  .feature-card:nth-child(4),
  .feature-card:nth-child(5),
  .feature-card:nth-child(6) {
    border-bottom: var(--border-thin);
  }

  .feature-card:nth-child(5),
  .feature-card:nth-child(6) {
    border-bottom: none;
  }

  .cta-section__inner {
    grid-template-columns: 1fr;
    gap: var(--space-12);
  }

  .cta-section__actions {
    flex-direction: row;
  }

  .footer__top {
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--space-10);
  }
}


/* ------------------------------------------------------------
   15. RESPONSIVE — 768px
   ------------------------------------------------------------ */

@media (max-width: 768px) {
  :root {
    --page-padding: 1.5rem;
    --nav-height: 56px;
    --type-6xl: 2.5rem;
    --type-5xl: 2rem;
    --type-4xl: 1.875rem;
    --type-3xl: 1.5rem;
  }

  /* Nav — hide links on mobile */
  .nav__links .nav__link:not(.nav__cta) {
    display: none;
  }

  .mega-menu {
    display: none;
  }

  /* Hero */
  .hero {
    padding-top: calc(var(--nav-height) + var(--space-16));
    padding-bottom: var(--space-16);
  }

  .hero__stats {
    grid-template-columns: 1fr 1fr;
  }

  .hero__footnote {
    flex-wrap: wrap;
    gap: var(--space-4);
  }

  /* Trust banner */
  .trust-banner__inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .trust-banner__divider {
    display: none;
  }

  .trust-banner__badges {
    gap: var(--space-4);
  }

  /* Sections */
  .lex-nihil,
  .services,
  .features,
  .cta-section {
    padding-top: var(--space-16);
    padding-bottom: var(--space-16);
  }

  /* Features */
  .features__grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    border-right: none;
    border-bottom: var(--border-thin);
  }

  .feature-card:nth-child(3n),
  .feature-card:nth-child(2n) {
    border-right: none;
  }

  .feature-card:nth-child(4),
  .feature-card:nth-child(5) {
    border-bottom: var(--border-thin);
  }

  .feature-card:last-child {
    border-bottom: none;
  }

  /* CTA */
  .cta-section__actions {
    flex-direction: column;
  }

  /* Footer */
  .footer__top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    padding-top: var(--space-16);
  }

  .footer__brand {
    grid-column: 1 / -1;
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  .footer__legal {
    flex-wrap: wrap;
    justify-content: center;
  }
}
/* ============================================================
   VAULTLET STORAGE PAGE — Append to styles.css
   ============================================================ */


/* ------------------------------------------------------------
   PAGE HERO (internal pages)
   ------------------------------------------------------------ */

.page-hero {
  padding-top: calc(var(--nav-height) + var(--space-24));
  padding-bottom: var(--space-24);
  padding-left: var(--page-padding);
  padding-right: var(--page-padding);
  background: var(--color-black);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.page-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

.page-hero__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-24);
  align-items: end;
}

.page-hero__breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--type-xs);
  color: var(--color-gray-50);
  margin-bottom: var(--space-6);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.page-hero__breadcrumb a {
  color: var(--color-gray-50);
  text-decoration: none;
  transition: color var(--duration-base) var(--ease-standard);
}

.page-hero__breadcrumb a:hover { color: var(--color-white); }

.page-hero__breadcrumb-sep {
  color: var(--color-gray-80);
}

.page-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--type-xs);
  font-weight: 500;
  color: var(--color-black);
  background: var(--color-white);
  padding: var(--space-1) var(--space-3);
  letter-spacing: 0.06em;
  margin-bottom: var(--space-6);
}

.page-hero__eyebrow-dot {
  width: 6px;
  height: 6px;
  background: var(--color-black);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

.page-hero__title {
  font-size: var(--type-6xl);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--color-white);
  margin-bottom: var(--space-6);
}

.page-hero__title strong { font-weight: 600; }

.page-hero__subtitle {
  font-size: var(--type-lg);
  color: var(--color-gray-30);
  line-height: 1.75;
  margin-bottom: var(--space-10);
  max-width: 540px;
}

.page-hero__cta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* Right col — hero specs panel */
.page-hero__specs {
  border: 1px solid var(--color-gray-80);
  background: var(--color-gray-100);
}

.page-hero__specs-header {
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-gray-80);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.page-hero__specs-title {
  font-family: var(--font-mono);
  font-size: var(--type-xs);
  font-weight: 500;
  color: var(--color-gray-50);
  letter-spacing: 0.06em;
}

.page-hero__specs-live {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--type-xs);
  color: var(--color-white);
  font-weight: 500;
}

.page-hero__specs-live-dot {
  width: 6px;
  height: 6px;
  background: var(--color-white);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

.page-hero__specs-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.spec-item {
  padding: var(--space-6);
  border-right: 1px solid var(--color-gray-80);
  border-bottom: 1px solid var(--color-gray-80);
}

.spec-item:nth-child(2n) { border-right: none; }
.spec-item:nth-last-child(-n+2) { border-bottom: none; }

.spec-item__value {
  font-family: var(--font-mono);
  font-size: var(--type-2xl);
  font-weight: 300;
  color: var(--color-white);
  line-height: 1;
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.spec-item__label {
  font-size: var(--type-xs);
  color: var(--color-gray-50);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}


/* ------------------------------------------------------------
   HOW IT WORKS
   ------------------------------------------------------------ */

.how-it-works {
  padding: var(--space-32) var(--page-padding);
  background: var(--color-white);
}

.how-it-works__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.how-it-works__steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: var(--border-thin);
  margin-top: var(--space-16);
  position: relative;
}

/* connector line */
.how-it-works__steps::before {
  content: '';
  position: absolute;
  top: 52px;
  left: calc(25% / 2);
  right: calc(25% / 2);
  height: 1px;
  background: var(--color-gray-20);
  z-index: 0;
}

.step-card {
  padding: var(--space-10) var(--space-8);
  border-right: var(--border-thin);
  background: var(--color-white);
  position: relative;
  z-index: 1;
  transition: background var(--duration-slow) var(--ease-standard);
}

.step-card:last-child { border-right: none; }
.step-card:hover { background: var(--color-gray-05); }

.step-card__number {
  width: 40px;
  height: 40px;
  border: var(--border-thin);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: var(--type-xs);
  font-weight: 600;
  color: var(--color-black);
  background: var(--color-white);
  margin-bottom: var(--space-6);
  transition:
    background var(--duration-base) var(--ease-standard),
    color var(--duration-base) var(--ease-standard),
    border-color var(--duration-base) var(--ease-standard);
}

.step-card:hover .step-card__number {
  background: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
}

.step-card__title {
  font-size: var(--type-base);
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: var(--space-3);
  letter-spacing: -0.01em;
}

.step-card__body {
  font-size: var(--type-sm);
  color: var(--color-gray-70);
  line-height: 1.7;
}


/* ------------------------------------------------------------
   ARCHITECTURE DIAGRAM
   ------------------------------------------------------------ */

.architecture {
  padding: var(--space-32) var(--page-padding);
  background: var(--color-gray-05);
  border-top: var(--border-thin);
  border-bottom: var(--border-thin);
}

.architecture__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: var(--space-24);
  align-items: center;
}

.architecture__diagram {
  border: var(--border-thin);
  background: var(--color-white);
  overflow: hidden;
}

.architecture__diagram-header {
  padding: var(--space-3) var(--space-5);
  background: var(--color-gray-05);
  border-bottom: var(--border-thin);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.architecture__diagram-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-gray-20);
}

.architecture__diagram-label {
  font-family: var(--font-mono);
  font-size: var(--type-xs);
  color: var(--color-gray-50);
  margin-left: var(--space-2);
  letter-spacing: 0.04em;
}

.architecture__diagram-body {
  padding: var(--space-8);
  font-family: var(--font-mono);
  font-size: var(--type-xs);
  line-height: 2;
  color: var(--color-gray-100);
}

.arch-layer {
  border: var(--border-thin);
  padding: var(--space-3) var(--space-5);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.arch-layer--client  { background: var(--color-white); }
.arch-layer--encrypt { background: var(--color-gray-100); color: var(--color-white); border-color: var(--color-black); }
.arch-layer--network { background: var(--color-gray-05); }
.arch-layer--storage { background: var(--color-white); }

.arch-layer__label {
  font-size: var(--type-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
}

.arch-layer__tag {
  font-size: 10px;
  font-weight: 500;
  padding: 2px 6px;
  border: 1px solid currentColor;
  letter-spacing: 0.04em;
  opacity: 0.7;
}

.arch-arrow {
  text-align: center;
  color: var(--color-gray-50);
  font-size: var(--type-xs);
  margin-bottom: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

/* right side: feature list */
.architecture__features {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: var(--border-thin);
}

.arch-feature {
  padding: var(--space-6) var(--space-8);
  border-bottom: var(--border-thin);
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
  background: var(--color-white);
  transition: background var(--duration-slow) var(--ease-standard);
}

.arch-feature:last-child { border-bottom: none; }
.arch-feature:hover { background: var(--color-gray-05); }

.arch-feature__icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border: var(--border-thin);
  background: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.arch-feature__icon svg { width: 18px; height: 18px; }

.arch-feature__title {
  font-size: var(--type-sm);
  font-weight: 600;
  color: var(--color-black);
  margin-bottom: var(--space-1);
}

.arch-feature__body {
  font-size: var(--type-sm);
  color: var(--color-gray-70);
  line-height: 1.65;
}


/* ------------------------------------------------------------
   PRICING / CALCULATOR
   ------------------------------------------------------------ */

.pricing {
  padding: var(--space-32) var(--page-padding);
  background: var(--color-white);
}

.pricing__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.pricing__grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-16);
  margin-top: var(--space-16);
  align-items: start;
}

/* Pricing breakdown table */
.pricing-table {
  border: var(--border-thin);
}

.pricing-table__header {
  padding: var(--space-4) var(--space-6);
  background: var(--color-black);
  color: var(--color-white);
  font-size: var(--type-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-4);
}

.pricing-table__row {
  padding: var(--space-5) var(--space-6);
  border-bottom: var(--border-thin);
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-4);
  align-items: center;
  transition: background var(--duration-base) var(--ease-standard);
}

.pricing-table__row:last-child { border-bottom: none; }
.pricing-table__row:hover { background: var(--color-gray-05); }

.pricing-table__component {
  font-size: var(--type-sm);
  font-weight: 500;
  color: var(--color-black);
}

.pricing-table__price {
  font-family: var(--font-mono);
  font-size: var(--type-base);
  font-weight: 500;
  color: var(--color-black);
}

.pricing-table__note {
  font-size: var(--type-xs);
  color: var(--color-gray-50);
}

/* Calculator */
.calculator {
  border: var(--border-thin);
  background: var(--color-white);
  position: sticky;
  top: calc(var(--nav-height) + var(--space-6));
}

.calculator__header {
  padding: var(--space-5) var(--space-6);
  border-bottom: var(--border-thin);
  background: var(--color-gray-05);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.calculator__title {
  font-size: var(--type-sm);
  font-weight: 600;
  color: var(--color-black);
  letter-spacing: -0.01em;
}

.calculator__tag {
  font-family: var(--font-mono);
  font-size: var(--type-xs);
  color: var(--color-gray-50);
  font-weight: 500;
}

.calculator__body {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.calc-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.calc-field__label {
  font-size: var(--type-xs);
  font-weight: 600;
  color: var(--color-gray-70);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.calc-field__unit {
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--color-gray-50);
}

.calc-field__input-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.calc-input {
  flex: 1;
  height: 40px;
  padding: 0 var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--type-sm);
  font-weight: 500;
  color: var(--color-black);
  background: var(--color-white);
  border: var(--border-thin);
  outline: none;
  transition: border-color var(--duration-base) var(--ease-standard);
  -moz-appearance: textfield;
}

.calc-input::-webkit-outer-spin-button,
.calc-input::-webkit-inner-spin-button { -webkit-appearance: none; }

.calc-input:focus {
  border-color: var(--color-black);
  box-shadow: inset 0 0 0 1px var(--color-black);
}

.calc-slider {
  width: 100%;
  height: 2px;
  background: var(--color-gray-20);
  outline: none;
  cursor: pointer;
  -webkit-appearance: none;
  margin-top: var(--space-2);
}

.calc-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  background: var(--color-black);
  cursor: pointer;
  border: 2px solid var(--color-white);
  box-shadow: 0 0 0 1px var(--color-black);
}

.calc-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  background: var(--color-black);
  cursor: pointer;
  border: 2px solid var(--color-white);
  box-shadow: 0 0 0 1px var(--color-black);
  border-radius: 0;
}

.calc-divider {
  height: 1px;
  background: var(--color-gray-20);
  margin: var(--space-1) 0;
}

/* Result panel */
.calculator__result {
  border-top: 2px solid var(--color-black);
  background: var(--color-black);
  color: var(--color-white);
  padding: var(--space-6);
}

.calculator__result-label {
  font-size: var(--type-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gray-50);
  margin-bottom: var(--space-3);
}

.calculator__result-total {
  font-family: var(--font-mono);
  font-size: var(--type-5xl);
  font-weight: 300;
  color: var(--color-white);
  line-height: 1;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-2);
}

.calculator__result-period {
  font-size: var(--type-xs);
  color: var(--color-gray-50);
  margin-bottom: var(--space-6);
}

.calculator__breakdown {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  background: var(--color-gray-100);
  border: 1px solid var(--color-gray-80);
}

.breakdown-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--type-xs);
}

.breakdown-line__label { color: var(--color-gray-50); }
.breakdown-line__value {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--color-gray-30);
}

.breakdown-line--total {
  border-top: 1px solid var(--color-gray-80);
  padding-top: var(--space-2);
  margin-top: var(--space-1);
}

.breakdown-line--total .breakdown-line__label { color: var(--color-gray-30); font-weight: 600; }
.breakdown-line--total .breakdown-line__value { color: var(--color-white); font-size: var(--type-sm); }


/* ------------------------------------------------------------
   USE CASES SECTION
   ------------------------------------------------------------ */

.use-cases {
  padding: var(--space-32) var(--page-padding);
  background: var(--color-gray-05);
  border-top: var(--border-thin);
}

.use-cases__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.use-cases__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: var(--border-thin);
  margin-top: var(--space-16);
}

.use-case-card {
  padding: var(--space-10) var(--space-8);
  border-right: var(--border-thin);
  background: var(--color-white);
  position: relative;
  overflow: hidden;
  transition: background var(--duration-slow) var(--ease-standard);
}

.use-case-card:last-child { border-right: none; }

.use-case-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-black);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--duration-slow) var(--ease-standard);
}

.use-case-card:hover { background: var(--color-gray-05); }
.use-case-card:hover::before { transform: scaleX(1); }

.use-case-card__industry {
  font-size: var(--type-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-gray-50);
  margin-bottom: var(--space-4);
}

.use-case-card__title {
  font-size: var(--type-lg);
  font-weight: 500;
  color: var(--color-black);
  margin-bottom: var(--space-4);
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.use-case-card__body {
  font-size: var(--type-sm);
  color: var(--color-gray-70);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.use-case-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.use-case-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  color: var(--color-gray-70);
  padding: 2px 8px;
  border: var(--border-thin);
  letter-spacing: 0.04em;
}


/* ------------------------------------------------------------
   RESPONSIVE — Vaultlet page additions
   ------------------------------------------------------------ */

@media (max-width: 1200px) {
  .page-hero__inner    { grid-template-columns: 1fr; gap: var(--space-12); }
  .how-it-works__steps { grid-template-columns: repeat(2, 1fr); }

  .step-card:nth-child(2) { border-right: none; }
  .step-card:nth-child(1),
  .step-card:nth-child(2) { border-bottom: var(--border-thin); }

  .architecture__inner { grid-template-columns: 1fr; }
  .pricing__grid       { grid-template-columns: 1fr; }
  .calculator          { position: static; }
  .use-cases__grid     { grid-template-columns: 1fr; }
  .use-case-card       { border-right: none; border-bottom: var(--border-thin); }
  .use-case-card:last-child { border-bottom: none; }
}

@media (max-width: 768px) {
  .page-hero__title         { font-size: var(--type-4xl); }
  .page-hero__specs-body    { grid-template-columns: 1fr 1fr; }
  .how-it-works__steps      { grid-template-columns: 1fr; }
  .step-card                { border-right: none; border-bottom: var(--border-thin); }
  .step-card:last-child     { border-bottom: none; }
  .pricing-table__header,
  .pricing-table__row       { grid-template-columns: 1fr 1fr; }
  .pricing-table__header span:last-child,
  .pricing-table__row .pricing-table__note { display: none; }
}

/* ============================================================
   BLACKCLAVE OVERRIDES — Append to styles.css
   ============================================================ */

.blackclave-dot-gold {
    background: #D4AF37 !important;
    box-shadow: 0 0 8px rgba(212, 175, 55, 0.5);
}

.blackclave-eyebrow {
    background: transparent !important;
    color: #D4AF37 !important;
    border: 1px solid #D4AF37;
}

.btn-blackclave-outline {
    background: transparent;
    color: #D4AF37;
    border-color: rgba(212, 175, 55, 0.5);
}

.btn-blackclave-outline:hover {
    background: rgba(212, 175, 55, 0.1);
    color: #F3CA47;
    border-color: #D4AF37;
    transform: translateY(-1px);
}

.btn-blackclave-gold {
    background: linear-gradient(135deg, #D4AF37 0%, #AA8529 100%);
    color: var(--color-black);
    border-color: transparent;
}

.btn-blackclave-gold:hover {
    background: linear-gradient(135deg, #E6C55A 0%, #C49B35 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(212, 175, 55, 0.2);
}

/* ============================================================
   BLACKCLAVE FORMS
   ============================================================ */

.blackclave-form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
}

.blackclave-input {
    height: 48px;
    padding: 0 var(--space-4);
    font-family: var(--font-mono); 
    font-size: var(--type-sm);
    color: var(--color-white);
    background: var(--color-black); 
    border: 1px solid var(--color-gray-80); 
    outline: none;
    transition: all var(--duration-base) var(--ease-standard);
    box-sizing: border-box; 
}

.blackclave-input:focus {
    border-color: #D4AF37;
    box-shadow: inset 0 0 0 1px #D4AF37;
}

.blackclave-error {
    font-size: var(--type-xs);
    color: #ff4d4d;
    font-family: var(--font-mono);
    margin-top: 0.25rem;
}