/* ══════════════════════════════════════════
   1. RESET & DESIGN TOKENS
   ══════════════════════════════════════════ */

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

:root {
  --bg: #FFFFFF;
  --bg-warm: #F7F7F8;
  --bg-surface: #EFEFF2;
  --text: #1A1820;
  --text-secondary: #3A3848;
  --text-muted: #6A6878;
  --text-dim: #9A98A8;
  --accent: #6B5BA8;
  --accent-soft: rgba(107, 91, 168, .08);
  --accent-hover: #574990;
  --border: #E4E4EA;
  --border-hover: #CCCCD8;
  --font: 'DM Sans', system-ui, -apple-system, sans-serif;
  --max: 1100px;
  --pad: clamp(1.5rem, 5vw, 4rem);
}


/* ══════════════════════════════════════════
   2. BASE ELEMENTS & TYPOGRAPHY
   ══════════════════════════════════════════ */

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent-hover);
  text-decoration: none;
  transition: color .2s;
}

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

h1 {
  font-size: clamp(2.6rem, 5.5vw, 4rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -.035em;
}

h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -.03em;
  margin-bottom: 1.25rem;
}

h3 {
  font-size: 1.15rem;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -.01em;
  margin-bottom: .5rem;
}

.eyebrow {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  display: block;
}

.subtitle {
  font-size: clamp(1rem, 1.8vw, 1.1rem);
  color: var(--text-secondary);
  max-width: 540px;
  line-height: 1.75;
  font-weight: 300;
}

.divider {
  width: 40px;
  height: 2px;
  background: var(--accent);
  margin: 2rem 0;
}


/* ══════════════════════════════════════════
   3. LAYOUT
   ══════════════════════════════════════════ */

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

section {
  padding: clamp(4rem, 10vw, 7rem) 0;
}

.page {
  display: none;
  opacity: 0;
  transform: translateY(8px);
}

.page.active {
  display: block;
  animation: fadeIn .45s ease forwards;
}


/* ══════════════════════════════════════════
   4. NAVIGATION
   ══════════════════════════════════════════ */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  letter-spacing: -.03em;
}

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

.logo span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: .82rem;
  font-weight: 500;
  letter-spacing: .04em;
  transition: color .2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.nav-burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 8px;
}

.nav-burger span {
  width: 20px;
  height: 1.5px;
  background: var(--text);
  transition: all .3s;
}


/* ══════════════════════════════════════════
   5. BUTTONS
   ══════════════════════════════════════════ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .8rem 1.75rem;
  font-family: var(--font);
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: .03em;
  border: none;
  cursor: pointer;
  transition: all .25s ease;
}

.btn-primary {
  background: #2A2440;
  color: #fff;
}

.btn-primary:hover {
  background: #3A3258;
  color: #fff;
  transform: translateY(-1px) scale(1.20);
  box-shadow: 0 4px 20px rgba(42, 36, 64, .25);
}

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

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: scale(1.20);
}

.btn-arrow::after {
  content: ' \2192';
}

.hero-ctas .btn:hover {
  margin: 0 0.4rem;
}


/* ══════════════════════════════════════════
   6. HERO SECTION (home)
   ══════════════════════════════════════════ */

.hero {
  min-height: calc(100vh - 64px);
  display: flex;
  align-items: center;
  margin-top: 64px;
  position: relative;
}

.hero h1 em {
  font-style: italic;
  font-weight: 300;
  color: var(--accent-hover);
}

.hero .subtitle {
  margin: 1.5rem 0 2.5rem;
}

.hero-ctas {
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
}

.hero-location {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: .78rem;
  color: var(--text-dim);
  letter-spacing: .06em;
  font-weight: 500;
}

.hero-location strong {
  color: var(--text-muted);
  font-weight: 600;
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-dim);
  font-size: 1.2rem;
  animation: bounce 2s infinite;
  cursor: pointer;
}


/* ══════════════════════════════════════════
   7. STATS STRIP (home)
   ══════════════════════════════════════════ */

.stats-strip {
  background: var(--bg-warm);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stats-inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
}

.stat {
  padding: 2.25rem 0;
  text-align: center;
}

.stat:not(:last-child) {
  border-right: 1px solid var(--border);
}

.stat-num {
  font-size: clamp(1.8rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -.03em;
  color: var(--text);
  line-height: 1;
}

.stat-label {
  font-size: .72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-top: .4rem;
  font-weight: 500;
}


/* ══════════════════════════════════════════
   8. SERVICE CARDS — expandable (home)
   ══════════════════════════════════════════ */

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(2, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-top: 2.5rem;
}

.service-card {
  background: var(--bg);
  padding: clamp(1.75rem, 4vw, 2.5rem);
  transition: background .25s;
}

.service-card:hover {
  background: var(--bg-warm);
}

.service-card .icon {
  width: 36px;
  height: 36px;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: .85rem;
  color: var(--accent);
  border-radius: 6px;
}

.service-card h3 {
  font-size: 1.05rem;
}

.service-card p {
  color: var(--text-muted);
  font-size: .9rem;
  line-height: 1.7;
}

.service-card summary {
  list-style: none;
  cursor: pointer;
  position: relative;
}

.service-card summary::marker,
.service-card summary::-webkit-details-marker {
  display: none;
}

.service-card[open] {
  background: var(--bg-warm);
}

.chevron-icon {
  position: absolute;
  top: 0;
  right: 0;
  color: var(--text-dim);
  flex-shrink: 0;
  transition: transform 0.35s ease;
}

.service-card[open] .chevron-icon {
  transform: rotate(180deg);
}

.expanded-content {
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
  font-size: .9rem;
  color: var(--text-muted);
  line-height: 1.7;
  overflow: hidden;
  transition: height 0.8s ease;
}

.expanded-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
  margin-top: 1.25rem;
}

.expanded-group .expanded-label {
  font-size: .68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--accent);
  display: block;
  margin-bottom: .5rem;
}

.expanded-group ul {
  list-style: none;
}

.expanded-group ul li {
  font-size: .88rem;
  color: var(--text-muted);
  padding: .2rem 0;
}

.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  margin-top: 2rem;
}

.card-cta {
  display: inline-block;
  padding: .75rem 1.5rem;
  background: var(--accent);
  border: 1px solid var(--accent);
  color: var(--bg);
  font: inherit;
  font-size: .9rem;
  cursor: pointer;
  border-radius: 4px;
  transition: opacity .2s, transform .1s;
  text-decoration: none;
}

.card-cta:hover {
  opacity: .88;
  color: var(--bg);
}

.card-cta:active {
  transform: translateY(1px);
}

.card-close {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  padding: .6rem 1rem;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font: inherit;
  font-size: .85rem;
  cursor: pointer;
  border-radius: 4px;
  transition: background .2s, color .2s, border-color .2s;
}

.card-close:hover {
  background: var(--bg-warm);
  color: var(--text);
  border-color: var(--text-muted);
}


/* ══════════════════════════════════════════
   9. ABOUT PAGE
   ══════════════════════════════════════════ */

.about-hero {
  padding-top: calc(64px + clamp(4rem, 10vw, 7rem));
  padding-bottom: clamp(3rem, 6vw, 5rem);
  border-bottom: 1px solid var(--border);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 6vw, 5rem);
  align-items: start;
}

.about-content p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  font-size: .95rem;
}

.about-content p strong {
  color: var(--text);
  font-weight: 600;
}

.values-list {
  list-style: none;
  margin-top: 1.5rem;
}

.values-list li {
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 1rem;
  align-items: start;
}

.values-list .v-num {
  font-size: .72rem;
  font-weight: 700;
  color: var(--accent);
}

.values-list h3 {
  font-size: 1rem;
  margin-bottom: .2rem;
}

.values-list p {
  color: var(--text-muted);
  font-size: .88rem;
  margin: 0;
}


/* ══════════════════════════════════════════
   10. TOOLS SECTION (about page)
   ══════════════════════════════════════════ */

.tools-section {
  background: var(--bg-warm);
  border-top: 1px solid var(--border);
}

.tools-grid {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: 1.75rem;
}

.tool-tag {
  padding: .5rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  font-size: .8rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all .2s;
  border-radius: 4px;
}

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


/* ══════════════════════════════════════════
   11. SERVICES PAGE
   ══════════════════════════════════════════ */

.services-hero {
  padding-top: calc(64px + clamp(4rem, 10vw, 7rem));
  padding-bottom: clamp(3rem, 6vw, 5rem);
  border-bottom: 1px solid var(--border);
}

.service-detail {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  padding: clamp(2.5rem, 5vw, 4rem) 0;
  border-bottom: 1px solid var(--border);
}

.service-label {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -.02em;
  position: sticky;
  top: 90px;
  line-height: 1.3;
}

.service-label .num {
  font-size: .65rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: .12em;
  text-transform: uppercase;
  display: block;
  margin-bottom: .6rem;
}

.service-detail p {
  color: var(--text-secondary);
  font-size: .92rem;
  margin-bottom: .75rem;
}

.service-detail ul {
  list-style: none;
  margin-top: .75rem;
}

.service-detail ul li {
  padding: .45rem 0;
  color: var(--text-muted);
  font-size: .88rem;
  border-bottom: 1px solid var(--border);
  padding-left: 1.25rem;
  position: relative;
}

.service-detail ul li::before {
  content: '\2014';
  position: absolute;
  left: 0;
  color: var(--accent);
}


/* ══════════════════════════════════════════
   12. CASE STUDIES (services page)
   ══════════════════════════════════════════ */

.cases-section {
  background: var(--bg-warm);
  border-top: 1px solid var(--border);
}

.case-card {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: clamp(1.75rem, 3.5vw, 2.5rem);
  margin-bottom: 1rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 2rem;
  align-items: start;
  transition: border-color .25s, box-shadow .25s;
}

.case-card:hover {
  border-color: var(--border-hover);
  box-shadow: 0 2px 16px rgba(0, 0, 0, .04);
}

.case-type {
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .5rem;
}

.case-card h3 {
  margin-bottom: .5rem;
  font-size: 1.05rem;
}

.case-card p {
  color: var(--text-muted);
  font-size: .88rem;
}

.case-result {
  text-align: right;
  min-width: 100px;
}

.case-result .result-num {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -.03em;
  color: var(--text);
  line-height: 1;
}

.case-result .result-label {
  font-size: .7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-top: .25rem;
  font-weight: 500;
}


/* ══════════════════════════════════════════
   13. CONTACT PAGE & FORM
   ══════════════════════════════════════════ */

.contact-hero {
  padding-top: calc(64px + clamp(4rem, 10vw, 7rem));
  padding-bottom: clamp(3rem, 6vw, 5rem);
  border-bottom: 1px solid var(--border);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(3rem, 6vw, 5rem);
}

.contact-info h3 {
  font-size: 1.15rem;
  margin-bottom: 1rem;
}

.contact-info p {
  color: var(--text-secondary);
  font-size: .92rem;
  margin-bottom: 1.5rem;
  line-height: 1.75;
}

.contact-detail {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.contact-detail .label {
  font-size: .68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text-dim);
  margin-bottom: .2rem;
}

.contact-detail .value {
  color: var(--text);
  font-size: .95rem;
  font-weight: 500;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: .4rem;
}

.form-group label {
  font-size: .72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea,
.form-group select {
  background: var(--bg-warm);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font);
  font-size: .92rem;
  padding: .8rem 1rem;
  outline: none;
  transition: border-color .2s;
  border-radius: 4px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 130px;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-dim);
}

.form-note {
  font-size: .75rem;
  color: var(--text-dim);
  margin-top: -.25rem;
}


/* ══════════════════════════════════════════
   14. FOOTER
   ══════════════════════════════════════════ */

footer {
  border-top: 1px solid var(--border);
  padding: 2.5rem 0;
  background: var(--bg-warm);
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--pad);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-left {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -.02em;
}

.footer-left span {
  color: var(--accent);
}

.footer-right {
  font-size: .75rem;
  color: var(--text-dim);
}


/* ══════════════════════════════════════════
   15. UTILITY — back-to-top
   ══════════════════════════════════════════ */

.back-to-top {
  display: block;
  margin: 4rem auto 3rem;
  padding: .75rem 1.75rem;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font: inherit;
  font-size: .9rem;
  letter-spacing: .02em;
  cursor: pointer;
  border-radius: 4px;
  transition: background .2s, color .2s, border-color .2s;
}

.back-to-top:hover {
  background: var(--bg-warm);
  color: var(--text);
  border-color: var(--text-muted);
}


/* ══════════════════════════════════════════
   16. ANIMATIONS
   ══════════════════════════════════════════ */

@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .6s ease, transform .6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-d1 { transition-delay: .08s; }
.reveal-d2 { transition-delay: .16s; }
.reveal-d3 { transition-delay: .24s; }


/* ══════════════════════════════════════════
   17. RESPONSIVE
   ══════════════════════════════════════════ */

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, .98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: 1.5rem var(--pad);
    gap: 1.25rem;
    transform: translateY(-120%);
    transition: transform .3s ease;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .nav-burger {
    display: flex;
  }

  .about-content,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .service-detail {
    grid-template-columns: 1fr;
  }

  .service-label {
    position: static;
  }

  .stats-inner {
    grid-template-columns: 1fr;
  }

  .stat:not(:last-child) {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }

  .case-card {
    grid-template-columns: 1fr;
  }

  .case-result {
    text-align: left;
  }
}