/* ==========================================================================
   MIRASTACK LABS — Main Stylesheet
   Design: Industrial Precision
   Font: JetBrains Mono
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties — Dark Mode (default)
   -------------------------------------------------------------------------- */
:root,
[data-theme="dark"] {
  --bg:            #090C10;
  --bg-alt:        #0F1318;
  --bg-card:       #131920;
  --text:          #DDE3EA;
  --text-muted:    #7A8694;
  --text-dim:      #4A5563;
  --accent:        #00C9B1;
  --accent-glow:   rgba(0, 201, 177, 0.12);
  --accent-red:    #E8456A;
  --border:        #1C2230;
  --border-accent: rgba(0, 201, 177, 0.3);
  --nav-bg:        rgba(9, 12, 16, 0.92);
  --table-head-bg: #131920;
  --table-row-alt: #0F1318;
}

[data-theme="light"] {
  --bg:            #F0F2F5;
  --bg-alt:        #FFFFFF;
  --bg-card:       #FFFFFF;
  --text:          #090C10;
  --text-muted:    #5A6373;
  --text-dim:      #9AA3AF;
  --accent:        #007A6E;
  --accent-glow:   rgba(0, 122, 110, 0.08);
  --accent-red:    #C0304F;
  --border:        #CDD3DC;
  --border-accent: rgba(0, 122, 110, 0.3);
  --nav-bg:        rgba(240, 242, 245, 0.94);
  --table-head-bg: #E8EAED;
  --table-row-alt: #F6F8FA;
}

/* --------------------------------------------------------------------------
   2. Reset & Base
   -------------------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'JetBrains Mono', 'Courier New', monospace;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover {
  opacity: 0.8;
}

img {
  max-width: 100%;
  display: block;
}

/* --------------------------------------------------------------------------
   3. Typography Scale
   -------------------------------------------------------------------------- */
.label {
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-block;
  margin-bottom: 1rem;
}

.label::before {
  content: "// ";
  opacity: 0.6;
}

.display {
  font-size: clamp(2.4rem, 5vw, 5rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.display em {
  font-style: normal;
  color: var(--accent);
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.015em;
}

h3 {
  font-size: 1.1rem;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

p {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.8;
}

.lead {
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--text);
  max-width: 56ch;
}

/* --------------------------------------------------------------------------
   4. Layout Utilities
   -------------------------------------------------------------------------- */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 7rem 0;
}

.section--alt {
  background-color: var(--bg-alt);
}

.section__header {
  margin-bottom: 4rem;
}

/* --------------------------------------------------------------------------
   5. NAV
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.nav__inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--text);
}

.nav__mark {
  flex-shrink: 0;
}

.nav__wordmark {
  font-size: 1.625rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text);
  line-height: 1;
}

.nav__wordmark-LABS {
  color: var(--text-muted);
  font-weight: 400;
}

.nav__controls {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav__cta {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--accent);
  border: none;
  padding: 0.5rem 1.2rem;
  cursor: pointer;
  transition: opacity 0.2s ease;
  text-decoration: none;
  display: inline-block;
}

.nav__cta:hover {
  opacity: 0.85;
  color: var(--bg);
}

/* Theme Toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease;
  position: relative;
}

.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.theme-toggle__icon {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.theme-toggle__icon--sun  { opacity: 0; transform: rotate(45deg); }
.theme-toggle__icon--moon { opacity: 1; transform: rotate(0deg); }

[data-theme="light"] .theme-toggle__icon--sun  { opacity: 1; transform: rotate(0deg); }
[data-theme="light"] .theme-toggle__icon--moon { opacity: 0; transform: rotate(-45deg); }

/* Burger */
.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav__burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger.is-open span:nth-child(2) { opacity: 0; }
.nav__burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Menu */
.nav__mobile {
  display: none;
  flex-direction: column;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding: 1rem 2rem;
  gap: 0;
}

.nav__mobile.is-open {
  display: flex;
}

.nav__mobile a {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text);
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  letter-spacing: 0.03em;
}

.nav__mobile a:last-child {
  border-bottom: none;
}

/* --------------------------------------------------------------------------
   6. HERO
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 60px;
  overflow: hidden;
}

/* Dot grid background */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--text-dim) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.25;
  pointer-events: none;
}

/* Accent glow */
.hero::after {
  content: "";
  position: absolute;
  top: 20%;
  left: -10%;
  width: 50vw;
  height: 50vw;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  max-width: 1160px;
  margin: 0 auto;
  padding: 5rem 2rem;
}

.hero__eyebrow {
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.hero__eyebrow::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.hero__title {
  font-size: clamp(2.4rem, 5.5vw, 5.2rem);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
  max-width: 14ch;
}

.hero__title .accent {
  color: var(--accent);
}

.hero__subtitle {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: var(--text-muted);
  max-width: 52ch;
  line-height: 1.7;
  margin-bottom: 2.5rem;
}

.hero__subtitle strong {
  color: var(--text);
  font-weight: 600;
}

.hero__chain {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 3rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  align-items: center;
}

.hero__chain-item {
  color: var(--text-muted);
}

.hero__chain-sep {
  color: var(--accent);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: opacity 0.2s ease, background 0.2s ease;
}

.btn--primary {
  background: var(--accent);
  color: var(--bg);
}

.btn--primary:hover {
  opacity: 0.88;
  color: var(--bg);
}

.btn--outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn--outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  opacity: 1;
}

/* --------------------------------------------------------------------------
   7. PROBLEM
   -------------------------------------------------------------------------- */
.problem {
  padding: 7rem 0;
  border-top: 1px solid var(--border);
}

.problem__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.problem__close {
  margin-top: 2.5rem;
  padding: 1.5rem;
  border-left: 2px solid var(--accent);
  background: var(--bg-card);
}

.problem__close p {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
}

.problem__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.problem__list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
}

.problem__list li:first-child {
  border-top: 1px solid var(--border);
}

.problem__list li::before {
  content: "—";
  color: var(--accent-red);
  flex-shrink: 0;
  font-weight: 700;
  margin-top: 0.05em;
}

/* --------------------------------------------------------------------------
   8. APPROACH / DEVOPS INFINITY
   -------------------------------------------------------------------------- */
.approach {
  padding: 7rem 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

/* Light mode: section uses page bg (#F0F2F5) so white bg-card grid cells
   read as elevated cards with proper depth — in dark mode bg-alt already
   contrasts correctly so no override needed. */
[data-theme="light"] .approach {
  background: var(--bg);
}

/* Two-column layout: diagram left, content right */
.approach__header {
  margin-bottom: 3rem;
}

.approach__header h2 {
  margin-top: 0.5rem;
  margin-bottom: 0;
}

.approach__layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: stretch;
}

.approach__diagram {
  display: flex;
}

.approach__diagram img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
}

.approach__inner {
  text-align: left;
}

.approach__inner .lead {
  margin: 0 0 3rem;
  color: var(--text-muted);
}

/* DevOps diagram image (unused but kept) */
.devops-diagram {
  margin: 3rem 0;
}

.devops-diagram img {
  width: 100%;
  max-width: 760px;
  height: auto;
  display: block;
  margin: 0 auto;
}

/* DevOps Infinity Loop Visual */
.devops-loop {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin: 3rem 0;
  border: 1px solid var(--border);
  position: relative;
  z-index: 1;
}

.devops-loop__step {
  padding: 1.5rem 1rem;
  text-align: center;
  border-right: 1px solid var(--border);
  position: relative;
  transition: background 0.2s ease;
  background: var(--bg-card);
}

.devops-loop__step:last-child {
  border-right: none;
}

.devops-loop__step:hover {
  background: var(--accent-glow);
}

.devops-loop__num {
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.devops-loop__name {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.devops-loop__row2 {
  border-top: 1px solid var(--border);
}

.devops-loop__step--active .devops-loop__name {
  color: var(--accent);
}

.devops-loop__step--active .devops-loop__num {
  color: var(--accent);
}

.approach__ai-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 0.5rem 1rem;
  margin-top: 1.5rem;
  position: relative;
  z-index: 1;
}

.approach__ai-label span {
  color: var(--accent);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   9. MIRADORSTACK
   -------------------------------------------------------------------------- */
.miradorstack {
  padding: 7rem 0;
  border-top: 1px solid var(--border);
}

.miradorstack__intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
  margin-bottom: 5rem;
}

.miradorstack__outcome {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  padding: 2rem;
  margin-top: 2rem;
}

.miradorstack__outcome-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.miradorstack__outcome p {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

/* Coverage grid */
.coverage {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border: 1px solid var(--border);
  margin-bottom: 5rem;
}

.coverage__item {
  padding: 1rem 1.2rem;
  border-right: 1px solid var(--border);
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.coverage__item:last-child {
  border-right: none;
}

.coverage__item::before {
  content: "●";
  font-size: 0.4rem;
  color: var(--accent);
}

/* Sub-products */
.sub-products {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--border);
}

.sub-product {
  padding: 2.5rem 2rem;
  border-right: 1px solid var(--border);
  position: relative;
}

.sub-product:last-child {
  border-right: none;
}

.sub-product::before {
  content: "";
  display: block;
  width: 24px;
  height: 2px;
  background: var(--accent);
  margin-bottom: 1.5rem;
}

.sub-product__name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.sub-product__tag {
  display: inline-block;
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-red);
  border: 1px solid var(--accent-red);
  padding: 0.15rem 0.5rem;
  margin-bottom: 1rem;
}

.sub-product__desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.sub-product__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sub-product__list li {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.sub-product__list li::before {
  content: "›";
  color: var(--accent);
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   10. DIFFERENTIATION TABLE
   -------------------------------------------------------------------------- */
.differentiation {
  padding: 7rem 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.diff-table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--border);
  font-size: 0.85rem;
}

.diff-table thead th {
  background: var(--table-head-bg);
  padding: 1rem 1.5rem;
  text-align: left;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--border);
}

.diff-table thead th:first-child {
  color: var(--text-muted);
  border-right: 1px solid var(--border);
}

.diff-table thead th:last-child {
  color: var(--accent);
}

.diff-table tbody tr {
  border-bottom: 1px solid var(--border);
}

.diff-table tbody tr:last-child {
  border-bottom: none;
}

.diff-table tbody tr:nth-child(even) td {
  background: var(--table-row-alt);
}

.diff-table tbody td {
  padding: 1.1rem 1.5rem;
  vertical-align: top;
}

.diff-table tbody td:first-child {
  color: var(--text-muted);
  border-right: 1px solid var(--border);
}

.diff-table tbody td:last-child {
  color: var(--text);
  font-weight: 600;
}

.diff-table tbody td:last-child::before {
  content: "✓  ";
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   11. OPEN FOUNDATION
   -------------------------------------------------------------------------- */
.foundation {
  padding: 7rem 0;
  border-top: 1px solid var(--border);
}

.foundation__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.foundation__code {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 2rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.9;
  position: relative;
}

.foundation__code::before {
  content: "// mira-framework.go";
  display: block;
  font-size: 0.65rem;
  color: var(--text-dim);
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.foundation__code .kw   { color: var(--accent); }
.foundation__code .str  { color: #E8C97A; }
.foundation__code .com  { color: var(--text-dim); font-style: italic; }
.foundation__code .fn   { color: #7BC8E8; }

.foundation__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2rem;
}

.tag {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 0.3rem 0.8rem;
}

.tag--accent {
  color: var(--accent);
  border-color: var(--border-accent);
}

/* --------------------------------------------------------------------------
   12. WHO WE BUILD FOR
   -------------------------------------------------------------------------- */
.who {
  padding: 7rem 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.verticals {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  border: 1px solid var(--border);
  margin-top: 3rem;
}

.vertical {
  padding: 2rem 1.5rem;
  border-right: 1px solid var(--border);
  text-align: center;
}

.vertical:last-child {
  border-right: none;
}

.vertical__icon {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  display: block;
}

.vertical__name {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  line-height: 1.4;
}

/* --------------------------------------------------------------------------
   13. CORE PRINCIPLES
   -------------------------------------------------------------------------- */
.principles {
  padding: 7rem 0;
  border-top: 1px solid var(--border);
}

.principles__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border: 1px solid var(--border);
  margin-top: 3rem;
}

.principle {
  padding: 2.5rem 2rem;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.principle:nth-child(3),
.principle:nth-child(6) {
  border-right: none;
}

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

.principle__index {
  font-size: 0.6rem;
  color: var(--text-dim);
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
  display: block;
}

.principle__title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}

.principle__desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   14. CONTACT / INVESTOR INQUIRY
   -------------------------------------------------------------------------- */
.contact {
  padding: 7rem 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
}

.contact__inner {
  max-width: 640px;
}

.contact__lead {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 3rem;
}

.contact__methods {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
}

.contact__method {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.8rem 2rem;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  transition: background 0.2s ease;
}

.contact__method:last-child {
  border-bottom: none;
}

.contact__method:hover {
  background: var(--accent-glow);
  color: var(--text);
  opacity: 1;
}

.contact__method-icon {
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
}

.contact__method-icon svg {
  width: 18px;
  height: 18px;
}

.contact__method-body {}

.contact__method-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.contact__method-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
}

.contact__method-value .arrow {
  color: var(--accent);
  margin-left: 0.5rem;
}

.contact__disclaimer {
  margin-top: 2rem;
  font-size: 0.72rem;
  color: var(--text-dim);
  line-height: 1.7;
  padding-left: 1rem;
  border-left: 1px solid var(--border);
}

/* --------------------------------------------------------------------------
   15. FOOTER
   -------------------------------------------------------------------------- */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.footer__inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.footer__tagline {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.footer__legal {
  font-size: 0.7rem;
  color: var(--text-dim);
  max-width: 72ch;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   16. Scroll Reveal
   -------------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.reveal--delay-1 { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }
.reveal--delay-3 { transition-delay: 0.3s; }
.reveal--delay-4 { transition-delay: 0.4s; }
.reveal--delay-5 { transition-delay: 0.5s; }

/* --------------------------------------------------------------------------
   17. Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
  .problem__grid,
  .miradorstack__intro,
  .foundation__grid,
  .approach__layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .sub-products {
    grid-template-columns: 1fr;
  }

  .sub-product {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .sub-product:last-child {
    border-bottom: none;
  }

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

  .coverage__item:nth-child(2),
  .coverage__item:nth-child(4),
  .coverage__item:nth-child(6),
  .coverage__item:nth-child(8) {
    border-right: none;
  }

  .coverage__item:nth-child(n+3) {
    border-top: 1px solid var(--border);
  }

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

  .devops-loop__step:nth-child(2),
  .devops-loop__step:nth-child(4),
  .devops-loop__step:nth-child(6),
  .devops-loop__step:nth-child(8) {
    border-right: none;
  }

  .verticals {
    grid-template-columns: repeat(3, 1fr);
  }

  .vertical:nth-child(3) {
    border-right: none;
  }

  .vertical:nth-child(n+4) {
    border-top: 1px solid var(--border);
  }

  .vertical:nth-child(5) {
    border-right: none;
  }

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

  .principle:nth-child(3) {
    border-right: 1px solid var(--border);
  }

  .principle:nth-child(2),
  .principle:nth-child(4),
  .principle:nth-child(6) {
    border-right: none;
  }

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

  .nav__cta {
    display: none;
  }

  .nav__burger {
    display: flex;
  }
}

@media (max-width: 600px) {
  .hero__title {
    font-size: 2.2rem;
  }

  .section {
    padding: 4.5rem 0;
  }

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

  .coverage__item {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

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

  .vertical:nth-child(odd) {
    border-right: 1px solid var(--border);
  }

  .vertical:nth-child(even) {
    border-right: none;
  }

  .vertical:nth-child(n+3) {
    border-top: 1px solid var(--border);
  }

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

  .principle {
    border-right: none !important;
    border-bottom: 1px solid var(--border) !important;
  }

  .principle:last-child {
    border-bottom: none !important;
  }

  .diff-table {
    font-size: 0.78rem;
  }

  .diff-table tbody td,
  .diff-table thead th {
    padding: 0.9rem 1rem;
  }
}