/* style.css — Riya Interactive Design System */

/* ========================================
   DESIGN TOKENS
   ======================================== */

:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* Fonts */
  --font-display: 'DM Serif Display', Georgia, serif;
  --font-body: 'DM Sans', 'Helvetica Neue', Arial, sans-serif;
}

/* ========================================
   LIGHT MODE (Default)
   ======================================== */

:root, [data-theme="light"] {
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-surface-2: #f1f3f5;
  --color-surface-offset: #e9ecef;
  --color-divider: #dee2e6;
  --color-border: #ced4da;

  --color-text: #1a1e2e;
  --color-text-muted: #5c6370;
  --color-text-faint: #adb5bd;

  --color-primary: #1d4fa0;
  --color-primary-hover: #163d7a;
  --color-primary-active: #0f2d5e;
  --color-primary-light: #e8eef8;

  --color-accent: #1e8a3e;
  --color-accent-hover: #166e31;
  --color-accent-light: #e6f5eb;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
}

/* ========================================
   DARK MODE
   ======================================== */

[data-theme="dark"] {
  --color-bg: #0f1117;
  --color-surface: #1a1d27;
  --color-surface-2: #22252f;
  --color-surface-offset: #1e2029;
  --color-divider: #2a2d37;
  --color-border: #353841;

  --color-text: #e1e3e8;
  --color-text-muted: #9ca0aa;
  --color-text-faint: #5c6170;

  --color-primary: #5b8fd9;
  --color-primary-hover: #7ba8e6;
  --color-primary-active: #9bc0f0;
  --color-primary-light: #1c2640;

  --color-accent: #3dbc5e;
  --color-accent-hover: #5dcc78;
  --color-accent-light: #162a1c;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0f1117;
    --color-surface: #1a1d27;
    --color-surface-2: #22252f;
    --color-surface-offset: #1e2029;
    --color-divider: #2a2d37;
    --color-border: #353841;
    --color-text: #e1e3e8;
    --color-text-muted: #9ca0aa;
    --color-text-faint: #5c6170;
    --color-primary: #5b8fd9;
    --color-primary-hover: #7ba8e6;
    --color-primary-active: #9bc0f0;
    --color-primary-light: #1c2640;
    --color-accent: #3dbc5e;
    --color-accent-hover: #5dcc78;
    --color-accent-light: #162a1c;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
  }
}

/* ========================================
   GLOBAL COMPONENTS
   ======================================== */

/* Container */
.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-8); }
}

/* Navigation */
/* Scroll progress bar */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  z-index: 200;
  width: 0%;
  transition: width 0.05s linear;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow 0.3s ease;
}

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

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) 0;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

@media (min-width: 768px) {
  .nav { padding-inline: var(--space-8); }
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.nav__logo img {
  height: 40px;
  width: auto;
}

.nav__logo-text {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-sm);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.nav__logo-text span {
  display: block;
  font-weight: 400;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav__links {
  display: none;
  list-style: none;
  gap: var(--space-1);
  align-items: center;
}

@media (min-width: 768px) {
  .nav__links { display: flex; }
}

.nav__links a {
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  transition: color 0.2s ease, background 0.2s ease;
  position: relative;
}

.nav__links a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transition: width 0.3s ease, left 0.3s ease;
}

.nav__links a:hover::after,
.nav__links a.active::after {
  width: 60%;
  left: 20%;
}

.nav__links a:hover,
.nav__links a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

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

.theme-toggle:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}

/* Mobile menu button */
.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  color: var(--color-text);
}

@media (min-width: 768px) {
  .mobile-menu-btn { display: none; }
}

.mobile-menu-btn:hover {
  background: var(--color-surface-2);
}

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 200;
  background: var(--color-surface);
  padding: var(--space-4);
  flex-direction: column;
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-8);
}

.mobile-menu__close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text);
}

.mobile-menu__close:hover {
  background: var(--color-surface-2);
}

.mobile-menu__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mobile-menu__links a {
  display: block;
  text-decoration: none;
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
}

.mobile-menu__links a:hover,
.mobile-menu__links a.active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* CTA button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-md);
  transition: all var(--transition-interactive);
  cursor: pointer;
  border: none;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  position: relative;
  overflow: hidden;
}

.btn--primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,0.15) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
}

.btn--primary:hover::after {
  transform: translateX(100%);
}

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

.btn--primary:active {
  transform: translateY(0);
}

.btn--secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn--secondary:hover {
  background: var(--color-primary-light);
  transform: translateY(-1px);
}

.btn--secondary:active {
  transform: translateY(0);
}

.btn--accent {
  background: var(--color-accent);
  color: #fff;
}

.btn--accent:hover {
  background: var(--color-accent-hover);
  box-shadow: var(--shadow-md);
}

.btn--large {
  padding: var(--space-3) var(--space-8);
  font-size: var(--text-base);
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
  position: relative;
  padding: clamp(var(--space-16), 10vw, var(--space-32)) 0;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, var(--color-primary-light) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 80%, var(--color-accent-light) 0%, transparent 50%);
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
}

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

@media (min-width: 768px) {
  .hero__grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-12);
  }
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  letter-spacing: -0.01em;
}

.hero__subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 540px;
  margin-bottom: var(--space-6);
  line-height: 1.7;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.hero__visual {
  position: relative;
}

.hero__image-wrapper {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 16/10;
}

.hero__image-wrapper img,
.hero__image-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.hero__video {
  display: block;
}

/* ========================================
   SECTION STYLES
   ======================================== */

.section {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) 0;
}

.section--alt {
  background: var(--color-surface-2);
}

.section__header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto var(--space-12);
}

.section__label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.section__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* Stats */
.stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .stats { grid-template-columns: repeat(4, 1fr); }
}

.stat {
  text-align: center;
  padding: var(--space-6) var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-divider);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.stat__number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.stat__label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 500;
}

/* Service cards */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .services-grid { grid-template-columns: repeat(3, 1fr); }
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: box-shadow 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

.service-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

.service-card:hover .service-card__icon {
  transform: scale(1.1);
}

.service-card__icon {
  transition: transform 0.3s ease;
}

.service-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.service-card__icon--green {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.service-card__title {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.service-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.service-card__list {
  list-style: none;
  margin-top: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.service-card__list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-5);
  position: relative;
}

.service-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

/* Client logo strip */
.logo-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-6);
}

.logo-strip__item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4) var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  transition: box-shadow 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
  height: 80px;
  width: 190px;
}

.logo-strip__item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.logo-strip__item img {
  max-height: 48px;
  max-width: 150px;
  width: auto;
  height: auto;
  object-fit: contain;
  filter: grayscale(100%) opacity(0.5);
  transition: filter 0.4s ease;
}

.logo-strip__item:hover img {
  filter: grayscale(0%) opacity(1);
}

[data-theme="dark"] .logo-strip__item img {
  filter: grayscale(100%) opacity(0.4) brightness(1.6);
}

[data-theme="dark"] .logo-strip__item:hover img {
  filter: grayscale(0%) opacity(1) brightness(1.2);
}

@media (max-width: 639px) {
  .logo-strip {
    gap: var(--space-3);
  }
  .logo-strip__item {
    width: calc(50% - var(--space-2));
    height: 68px;
    padding: var(--space-3) var(--space-4);
  }
  .logo-strip__item img {
    max-height: 40px;
    max-width: 120px;
  }
}

/* Certification strip */
.cert-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: stretch;
  gap: var(--space-6);
}

.cert-strip__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  text-align: center;
  width: 220px;
  transition: box-shadow var(--transition-interactive);
}

.cert-strip__item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.cert-strip__item {
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.cert-strip__item img {
  max-height: 72px;
  max-width: 160px;
  width: auto;
  height: auto;
  object-fit: contain;
}

.cert-strip__item span {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

@media (max-width: 639px) {
  .cert-strip {
    gap: var(--space-4);
  }
  .cert-strip__item {
    width: calc(50% - var(--space-2));
    padding: var(--space-4);
  }
}

/* Case study cards */
.case-studies-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .case-studies-grid { grid-template-columns: repeat(2, 1fr); }
}

.case-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
}

.case-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--color-primary);
}

.case-card__tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}

.case-card__tag--blue {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.case-card__tag--green {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.case-card__body {
  padding: var(--space-6);
}

.case-card__title {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.case-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-4);
}

.case-card__result {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
}

.case-card__result svg {
  flex-shrink: 0;
}

/* Client logos strip */
.clients-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--space-8);
  padding: var(--space-8) 0;
}

.clients-strip__item {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* Testimonial */
.testimonial {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.testimonial__quote {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  font-style: italic;
  margin-bottom: var(--space-4);
}

.testimonial__author {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* CTA Section */
.cta-section {
  background: var(--color-primary);
  color: #fff;
  text-align: center;
  padding: clamp(var(--space-12), 8vw, var(--space-20)) 0;
}

.cta-section__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: #fff;
  margin-bottom: var(--space-3);
}

.cta-section__desc {
  font-size: var(--text-base);
  color: rgba(255,255,255,0.85);
  margin-bottom: var(--space-6);
  max-width: 560px;
  margin-inline: auto;
}

.cta-section .btn--primary {
  background: #fff;
  color: var(--color-primary);
}

.cta-section .btn--primary:hover {
  background: rgba(255,255,255,0.9);
}

/* Footer */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  padding: var(--space-12) 0 var(--space-6);
}

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

@media (min-width: 768px) {
  .footer__grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}

.footer__brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
  max-width: 280px;
}

.footer__col-title {
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

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

.footer__links a:hover {
  color: var(--color-primary);
}

.footer__bottom {
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-4);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
}

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

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

.footer__legal a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
}

.footer__legal a:hover {
  color: var(--color-text-muted);
}

/* ========================================
   PAGE-SPECIFIC: ABOUT
   ======================================== */

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

@media (min-width: 768px) {
  .about-hero { grid-template-columns: 1fr 1fr; gap: var(--space-12); }
}

.about-hero__content .section__title {
  text-align: left;
}

.timeline {
  position: relative;
  padding-left: var(--space-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-divider);
}

.timeline__item {
  position: relative;
  margin-bottom: var(--space-6);
  transition: transform 0.3s ease;
}

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

.timeline__item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--space-8) + 8px);
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid var(--color-bg);
}

.timeline__year {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}

.timeline__title {
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.timeline__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Values grid */
.values-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .values-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .values-grid { grid-template-columns: repeat(4, 1fr); }
}

.value-card {
  text-align: center;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
}

.value-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: var(--color-primary);
}

.value-card:hover .value-card__icon {
  transform: scale(1.1);
  background: var(--color-primary);
  color: #fff;
}

.value-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-lg);
  margin: 0 auto var(--space-4);
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
}

.value-card__title {
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.value-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ========================================
   PAGE-SPECIFIC: SERVICES DETAIL
   ======================================== */

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

@media (min-width: 768px) {
  .service-detail { grid-template-columns: 1fr 1fr; gap: var(--space-12); }
}

.service-detail--reverse {
  direction: ltr;
}

@media (min-width: 768px) {
  .service-detail--reverse { direction: rtl; }
  .service-detail--reverse > * { direction: ltr; }
}

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

.service-detail__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
}

.service-detail__desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.service-detail__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-top: var(--space-2);
}

.service-detail__list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text);
}

.service-detail__list li svg {
  flex-shrink: 0;
  margin-top: 3px;
  color: var(--color-accent);
}

.service-detail__visual {
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
}

.service-detail__visual svg {
  color: var(--color-primary);
  opacity: 0.6;
}

/* ========================================
   PAGE-SPECIFIC: CONTACT
   ======================================== */

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

@media (min-width: 768px) {
  .contact-grid { grid-template-columns: 1fr 1.2fr; gap: var(--space-12); }
}

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

.contact-info__item {
  display: flex;
  gap: var(--space-4);
}

.contact-info__icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  transition: background 0.3s ease, color 0.3s ease, transform 0.3s ease;
}

.contact-info__item:hover .contact-info__icon {
  background: var(--color-primary);
  color: #fff;
  transform: scale(1.08);
}

.contact-info__label {
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-1);
}

.contact-info__value {
  font-size: var(--text-base);
  color: var(--color-text);
}

.contact-info__value a {
  color: var(--color-primary);
  text-decoration: none;
}

.contact-info__value a:hover {
  text-decoration: underline;
}

.contact-form {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

@media (min-width: 768px) {
  .contact-form { padding: var(--space-8); }
}

.contact-form__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-group label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  font-size: var(--text-base);
  color: var(--color-text);
  transition: border-color var(--transition-interactive);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 640px) {
  .form-row { grid-template-columns: 1fr 1fr; }
}

/* ========================================
   ANIMATIONS
   ======================================== */

/* ========================================
   EXPANDABLE CARDS + MODAL OVERLAY
   ======================================== */

.case-card--expandable,
.insight-card[data-expandable] {
  cursor: pointer;
}

.case-card__toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-light);
  border: 1.5px solid var(--color-primary);
  border-radius: var(--radius-md);
  cursor: pointer;
  padding: var(--space-2) var(--space-4);
  transition: all 0.2s ease;
}

.case-card__toggle:hover {
  background: var(--color-primary);
  color: #fff;
}

/* Hidden expanded content (used as source for modal) */
.case-card__expanded {
  display: none;
}

/* Modal Overlay */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  max-width: 640px;
  width: 100%;
  max-height: 85vh;
  overflow-y: auto;
  padding: var(--space-8);
  position: relative;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.25);
  transform: translateY(20px) scale(0.97);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-overlay.active .modal {
  transform: translateY(0) scale(1);
}

.modal__close {
  position: absolute;
  top: var(--space-4);
  right: var(--space-4);
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: background 0.2s ease, color 0.2s ease;
  z-index: 1;
}

.modal__close:hover {
  background: var(--color-surface-offset);
  color: var(--color-text);
}

.modal__tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
}

.modal__tag--blue {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.modal__tag--green {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.modal__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-4);
  padding-right: var(--space-8);
}

.modal__results {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-divider);
}

.modal__result {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
}

.modal__detail {
  margin-bottom: var(--space-5);
}

.modal__detail:last-child {
  margin-bottom: 0;
}

.modal__detail h4 {
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: var(--space-2);
}

.modal__detail p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.8;
}

@media (max-width: 639px) {
  .modal {
    padding: var(--space-5);
    max-height: 90vh;
    border-radius: var(--radius-lg);
  }
  
  .modal__title {
    font-size: var(--text-base);
  }
}

/* ========================================
   DIFFERENTIATORS SECTION
   ======================================== */

.differentiators {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  max-width: 800px;
  margin: 0 auto;
}

.diff-card {
  display: flex;
  gap: var(--space-6);
  align-items: flex-start;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
}

.diff-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: var(--color-primary);
}

.diff-card__number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
  opacity: 0.2;
  flex-shrink: 0;
  line-height: 1;
  min-width: 48px;
}

.diff-card:hover .diff-card__number {
  opacity: 0.5;
  transition: opacity 0.3s ease;
}

.diff-card__title {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.diff-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

@media (max-width: 639px) {
  .diff-card {
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-5);
  }
  
  .diff-card__number {
    font-size: var(--text-lg);
  }
}

/* ========================================
   INSIGHTS / THOUGHT LEADERSHIP
   ======================================== */

.insights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 768px) {
  .insights-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.insight-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
  cursor: pointer;
}

.insight-card.case-card--expanded {
  cursor: default;
}

.insight-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: var(--color-primary);
}

.insight-card__tag {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
  width: fit-content;
}

.insight-card__tag--blue {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.insight-card__tag--green {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.insight-card__title {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.4;
}

.insight-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
  flex-grow: 1;
}

.insight-card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}

/* ========================================
   MOBILE OPTIMIZATIONS
   ======================================== */

@media (max-width: 767px) {
  /* Hero section - stack properly on mobile */
  .hero {
    padding: var(--space-12) 0 var(--space-8);
  }
  
  .hero__title {
    font-size: clamp(1.75rem, 6vw, 2.25rem);
  }
  
  .hero__actions {
    flex-direction: column;
  }
  
  .hero__actions .btn {
    width: 100%;
    justify-content: center;
    padding: var(--space-3) var(--space-6);
    font-size: var(--text-base);
    min-height: 48px;
  }
  
  /* Larger touch targets for all buttons */
  .btn {
    min-height: 44px;
    padding: var(--space-2) var(--space-4);
  }
  
  .btn--large {
    min-height: 48px;
    padding: var(--space-3) var(--space-6);
  }
  
  /* Service detail sections - image below text */
  .service-detail {
    gap: var(--space-6);
  }
  
  .service-detail__visual {
    min-height: 200px;
    border-radius: var(--radius-lg);
  }
  
  /* About page hero */
  .about-hero {
    gap: var(--space-6);
  }
  
  /* Section spacing tighter on mobile */
  .section {
    padding: var(--space-10) 0;
  }
  
  .section__header {
    margin-bottom: var(--space-8);
  }
  
  .section__title {
    font-size: clamp(1.375rem, 5vw, 1.75rem);
  }
  
  /* Footer grid on mobile */
  .footer__grid {
    gap: var(--space-6);
  }
  
  .footer__bottom {
    flex-direction: column;
    text-align: center;
    gap: var(--space-2);
  }
  
  /* CTA section */
  .cta-section {
    padding: var(--space-10) 0;
  }
  
  .cta-section .btn--large {
    width: 100%;
    max-width: 300px;
  }
  
  /* Contact form area */
  .contact-grid {
    gap: var(--space-6);
  }
  
  .contact-form {
    padding: var(--space-5);
  }
  
  /* Values grid - full width on mobile */
  .values-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
  
  /* Nav links - ensure email doesn't overflow */
  .footer__links a,
  .contact-info__value a {
    word-break: break-all;
  }
  
  /* Testimonial */
  .testimonial {
    padding: var(--space-6);
  }
  
  /* Disable hover transforms on touch devices */
  .service-card:hover,
  .value-card:hover,
  .case-card:hover,
  .stat:hover,
  .cert-strip__item:hover,
  .logo-strip__item:hover {
    transform: none;
  }
}

/* Ensure touch targets meet accessibility minimum (48px) */
@media (pointer: coarse) {
  .nav__links a {
    min-height: 44px;
    display: flex;
    align-items: center;
  }
  
  .footer__links a {
    min-height: 40px;
    display: flex;
    align-items: center;
  }
  
  .theme-toggle {
    width: 44px;
    height: 44px;
  }
}

/* ========================================
   ANIMATIONS
   ======================================== */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  opacity: 0;
  transform: translateY(20px);
}

.fade-in.visible {
  animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Stagger delays */
.fade-in.delay-1 { animation-delay: 0.1s; }
.fade-in.delay-2 { animation-delay: 0.2s; }
.fade-in.delay-3 { animation-delay: 0.3s; }
.fade-in.delay-4 { animation-delay: 0.4s; }