/* ============================================
   SIVAROC — style.css
   Editorial Confidence Design
   ============================================ */

/* ---- COLOR TOKENS ---- */
:root,
[data-theme='light'] {
  --color-bg: #F5F0EB;
  --color-surface: #EDE8E2;
  --color-surface-2: #E6E1DB;
  --color-text: #1A1A1A;
  --color-text-muted: #6B6560;
  --color-text-faint: #A9A29B;
  --color-primary: #1A6B5A;
  --color-primary-hover: #145A4B;
  --color-primary-active: #0F493D;
  --color-border: rgba(26, 26, 26, 0.08);
  --color-divider: rgba(26, 26, 26, 0.06);
  --color-text-inverse: #F5F0EB;

  --shadow-sm: 0 1px 2px rgba(26, 26, 26, 0.04);
  --shadow-md: 0 4px 12px rgba(26, 26, 26, 0.06);
  --shadow-lg: 0 12px 32px rgba(26, 26, 26, 0.1);
}

[data-theme='dark'] {
  --color-bg: #111110;
  --color-surface: #1A1918;
  --color-surface-2: #222120;
  --color-text: #E8E6E2;
  --color-text-muted: #9B9590;
  --color-text-faint: #5E5954;
  --color-primary: #2D9B84;
  --color-primary-hover: #35B298;
  --color-primary-active: #3DC8AA;
  --color-border: rgba(232, 230, 226, 0.1);
  --color-divider: rgba(232, 230, 226, 0.06);
  --color-text-inverse: #111110;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #111110;
    --color-surface: #1A1918;
    --color-surface-2: #222120;
    --color-text: #E8E6E2;
    --color-text-muted: #9B9590;
    --color-text-faint: #5E5954;
    --color-primary: #2D9B84;
    --color-primary-hover: #35B298;
    --color-primary-active: #3DC8AA;
    --color-border: rgba(232, 230, 226, 0.1);
    --color-divider: rgba(232, 230, 226, 0.06);
    --color-text-inverse: #111110;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
  }
}

/* ---- LAYOUT ---- */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (min-width: 768px) {
  .container {
    padding-inline: var(--space-10);
  }
}

/* ---- HEADER ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: background 0.3s ease;
}

.header-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .header-inner {
    padding-inline: var(--space-10);
  }
}

.logo svg {
  color: var(--color-text);
  display: block;
}

.main-nav {
  display: none;
  gap: var(--space-8);
}

@media (min-width: 900px) {
  .main-nav {
    display: flex;
  }
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.01em;
}

.nav-link:hover {
  color: var(--color-text);
}

.header-actions {
  display: none;
  align-items: center;
  gap: var(--space-4);
}

@media (min-width: 900px) {
  .header-actions {
    display: flex;
  }
}

/* Language toggle */
.lang-toggle {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
}

.lang-toggle:hover {
  color: var(--color-text);
}

.lang-active {
  color: var(--color-text);
  font-weight: 700;
}

.lang-sep {
  color: var(--color-text-faint);
  margin-inline: 2px;
}

.lang-inactive {
  color: var(--color-text-faint);
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-divider);
}

/* CTA button */
.btn-cta {
  display: inline-flex;
  align-items: center;
  padding: var(--space-2) var(--space-5);
  background: var(--color-text);
  color: var(--color-text-inverse);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-full);
  letter-spacing: 0.01em;
}

.btn-cta:hover {
  opacity: 0.85;
}

/* Mobile menu button */
.mobile-menu-btn {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  gap: 5px;
  padding: var(--space-2);
}

.mobile-menu-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.mobile-menu-btn[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-menu-btn[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.mobile-menu-btn[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (min-width: 900px) {
  .mobile-menu-btn {
    display: none;
  }
}

/* Mobile menu */
.mobile-menu {
  display: none;
  padding: var(--space-8) var(--space-6);
  border-top: 1px solid var(--color-divider);
}

.mobile-menu.is-open {
  display: block;
}

@media (min-width: 900px) {
  .mobile-menu {
    display: none !important;
  }
}

.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.mobile-nav-link {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
}

.mobile-controls {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}

.mobile-cta {
  margin-top: var(--space-4);
  text-align: center;
  justify-content: center;
}

/* ---- HERO ---- */
.hero {
  padding-top: clamp(8rem, 12vw, 14rem);
  padding-bottom: clamp(var(--space-16), 6vw, var(--space-24));
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  align-items: end;
}

@media (min-width: 768px) {
  .hero-grid {
    grid-template-columns: 1.2fr 0.8fr;
    gap: var(--space-12);
  }
}

.hero-title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-3xl);
  font-weight: 400;
  line-height: 1.05;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.hero-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: 42ch;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: #fff;
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-full);
  letter-spacing: 0.01em;
}

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

.btn-primary.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

.btn-text {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.btn-text:hover {
  color: var(--color-text);
}

.btn-text .arrow {
  transition: transform var(--transition-interactive);
}

.btn-text:hover .arrow {
  transform: translateX(4px);
}

/* ---- EDITORIAL IMAGE ---- */
.editorial-image {
  padding-bottom: clamp(var(--space-16), 8vw, var(--space-32));
}

.image-wrapper {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.image-wrapper img {
  width: 100%;
  height: auto;
  display: block;
}

/* ---- PROBLEM STATEMENT ---- */
.problem-statement {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.big-quote {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  line-height: 1.4;
  color: var(--color-text);
  max-width: 50ch;
  margin-inline: auto;
  text-align: center;
}

.big-quote em {
  font-style: italic;
  color: var(--color-primary);
}

/* ---- SIRA METHODOLOGY ---- */
.sira-section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.section-label {
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-text-faint);
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: clamp(var(--space-10), 4vw, var(--space-16));
}

.sira-timeline {
  display: flex;
  flex-direction: column;
  gap: clamp(var(--space-10), 4vw, var(--space-16));
}

.sira-phase {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  padding-left: var(--space-6);
  border-left: 2px solid var(--color-divider);
}

@media (min-width: 768px) {
  .sira-phase {
    grid-template-columns: 200px 1fr;
    grid-template-rows: auto auto;
    gap: var(--space-4) var(--space-10);
    padding-left: 0;
    border-left: none;
  }
}

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

.phase-name {
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text);
  white-space: nowrap;
}

.phase-line {
  display: none;
  flex: 1;
  height: 1px;
  background: var(--color-divider);
}

@media (min-width: 768px) {
  .phase-line {
    display: block;
  }
}

.phase-tagline {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-text);
}

@media (min-width: 768px) {
  .phase-tagline {
    grid-column: 2;
  }
}

.phase-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

@media (min-width: 768px) {
  .phase-details {
    grid-column: 2;
  }
}

.phase-details li {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
}

.phase-details li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 1px;
  background: var(--color-text-faint);
}

/* ---- SERVICES ---- */
.services-section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
  background: var(--color-surface);
}

.services-list {
  display: flex;
  flex-direction: column;
}

.service-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  padding-block: clamp(var(--space-8), 3vw, var(--space-12));
  border-top: 1px solid var(--color-border);
}

.service-row:last-child {
  border-bottom: 1px solid var(--color-border);
}

@media (min-width: 768px) {
  .service-row {
    grid-template-columns: 48px 1fr 1.2fr;
    gap: var(--space-8);
    align-items: start;
  }
}

.service-number {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-text-faint);
  font-variant-numeric: tabular-nums;
}

.service-name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  color: var(--color-text);
}

.service-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ---- TYPOGRAPHIC DIVIDER ---- */
.typo-divider {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}

.divider-text {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  line-height: 1.2;
  color: var(--color-text);
  text-align: center;
  max-width: 20ch;
  margin-inline: auto;
}

.divider-text em {
  font-style: italic;
  color: var(--color-primary);
}

/* ---- INDUSTRIES ---- */
.industries-section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
  border-top: 1px solid var(--color-divider);
}

.industries-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.industry-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: clamp(var(--space-8), 3vw, var(--space-12));
  max-width: 700px;
}

.industry-card:nth-child(2) {
  align-self: flex-end;
}

.industry-name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.industry-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ---- CTA SECTION ---- */
.cta-section {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
  background: var(--color-surface);
}

.cta-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .cta-grid {
    grid-template-columns: 0.6fr 1fr;
    gap: var(--space-12);
    align-items: start;
  }
}

.cta-title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text);
}

.cta-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: 50ch;
}

.cta-actions {
  margin-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: flex-start;
}

.cta-alt {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
}

.cta-alt a {
  color: var(--color-text-muted);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.cta-alt a:hover {
  color: var(--color-text);
}

/* ---- FOOTER ---- */
.site-footer {
  padding-block: var(--space-12);
  border-top: 1px solid var(--color-divider);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    align-items: flex-start;
    justify-content: space-between;
  }
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-logo svg {
  color: var(--color-text);
}

.footer-tagline {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
}

.footer-nav {
  display: flex;
  gap: var(--space-6);
}

.footer-nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--color-text);
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ---- FADE-IN ANIMATIONS ---- */
.fade-in {
  opacity: 0;
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-in.is-visible {
  opacity: 1;
}

/* Disable animations for reduced motion */
@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transition: none;
  }
}