/* ============================================================
   Zelta Group — Material Design 3 inspired stylesheet
   ============================================================ */

:root {
  /* M3 colour roles */
  --md-primary: #0b57d0;
  --md-on-primary: #ffffff;
  --md-primary-container: #d3e3fd;
  --md-on-primary-container: #041e49;
  --md-secondary-container: #c2e7ff;
  --md-on-secondary-container: #001d35;
  --md-tertiary: #146c2e;
  --md-tertiary-container: #c4eed0;
  --md-surface: #f8f9ff;
  --md-surface-container-low: #f1f4fb;
  --md-surface-container: #eaeef6;
  --md-surface-container-high: #e2e7f0;
  --md-on-surface: #1a1c1e;
  --md-on-surface-variant: #44474f;
  --md-outline: #74777f;
  --md-outline-variant: #c4c6d0;
  --md-inverse-surface: #1d2733;
  --md-inverse-on-surface: #e8ecf4;

  /* M3 shape */
  --shape-xs: 4px;
  --shape-sm: 8px;
  --shape-md: 12px;
  --shape-lg: 16px;
  --shape-xl: 28px;
  --shape-full: 999px;

  /* M3 elevation */
  --elev-1: 0 1px 2px rgba(0,0,0,.3), 0 1px 3px 1px rgba(0,0,0,.15);
  --elev-2: 0 1px 2px rgba(0,0,0,.3), 0 2px 6px 2px rgba(0,0,0,.15);
  --elev-3: 0 4px 8px 3px rgba(0,0,0,.15), 0 1px 3px rgba(0,0,0,.3);

  --ease: cubic-bezier(.2, 0, 0, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Roboto', system-ui, sans-serif;
  background: var(--md-surface);
  color: var(--md-on-surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--md-primary); text-decoration: none; }
img { max-width: 100%; display: block; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.material-symbols-rounded {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  user-select: none;
}

/* ---------- Typography (M3 type scale) ---------- */
.display-md { font-size: clamp(2.2rem, 5vw, 3.5rem); line-height: 1.12; font-weight: 400; letter-spacing: -.25px; }
.headline-lg { font-size: clamp(1.75rem, 3.4vw, 2.25rem); line-height: 1.25; font-weight: 400; }
.headline-sm { font-size: 1.5rem; line-height: 1.33; font-weight: 400; }
.title-lg { font-size: 1.375rem; line-height: 1.27; font-weight: 500; }
.title-md { font-size: 1rem; line-height: 1.5; font-weight: 500; letter-spacing: .15px; }
.body-lg { font-size: 1rem; letter-spacing: .5px; color: var(--md-on-surface-variant); }
.label-lg { font-size: .875rem; font-weight: 500; letter-spacing: .1px; }
.overline {
  display: inline-block;
  font-size: .75rem; font-weight: 500; letter-spacing: 1.2px; text-transform: uppercase;
  color: var(--md-primary); margin-bottom: 12px;
}

/* ---------- Buttons ---------- */
.btn {
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 40px; padding: 0 24px;
  border-radius: var(--shape-full); border: none;
  font: 500 .875rem/1 'Roboto', sans-serif; letter-spacing: .1px;
  cursor: pointer; transition: box-shadow .2s var(--ease), background-color .2s var(--ease);
}
.btn .material-symbols-rounded { font-size: 18px; }
.btn::after { /* state layer */
  content: ''; position: absolute; inset: 0; background: currentColor; opacity: 0;
  transition: opacity .2s var(--ease);
}
.btn:hover::after { opacity: .08; }
.btn:focus-visible::after, .btn:active::after { opacity: .12; }
.btn:focus-visible { outline: 3px solid var(--md-primary); outline-offset: 2px; }

.btn-filled { background: var(--md-primary); color: var(--md-on-primary); }
.btn-filled:hover { box-shadow: var(--elev-1); }
.btn-tonal { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }
.btn-outlined { background: transparent; color: var(--md-primary); border: 1px solid var(--md-outline); }
.btn-text { background: transparent; color: var(--md-primary); padding: 0 12px; }
.btn-lg { height: 56px; padding: 0 32px; font-size: 1rem; }
.btn-on-dark { background: var(--md-primary-container); color: var(--md-on-primary-container); }

/* ---------- Top app bar ---------- */
.top-app-bar {
  position: sticky; top: 0; z-index: 100;
  background: var(--md-surface);
  transition: background-color .2s var(--ease), box-shadow .2s var(--ease);
}
.top-app-bar.scrolled { background: var(--md-surface-container); box-shadow: var(--elev-2); }
.top-app-bar .container { display: flex; align-items: center; height: 72px; gap: 24px; }

.brand { display: flex; align-items: center; gap: 12px; color: var(--md-on-surface); }
.brand-mark {
  width: 40px; height: 40px; border-radius: var(--shape-md);
  background: var(--md-primary); color: var(--md-on-primary);
  display: grid; place-items: center; font-weight: 700; font-size: 1.25rem;
}
.brand-name { font-size: 1.25rem; font-weight: 500; }
.brand-name span { color: var(--md-primary); }

.nav-links { display: flex; list-style: none; gap: 4px; margin-left: auto; }
.nav-links a {
  display: block; padding: 8px 16px; border-radius: var(--shape-full);
  color: var(--md-on-surface-variant); font-weight: 500; font-size: .9rem;
  transition: background-color .2s var(--ease);
}
.nav-links a:hover { background: rgba(68,71,79,.08); }
.nav-links a.active { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }

.icon-btn {
  display: none; width: 48px; height: 48px; border-radius: var(--shape-full);
  border: none; background: transparent; color: var(--md-on-surface-variant); cursor: pointer;
  place-items: center; margin-left: auto;
}
.icon-btn:hover { background: rgba(68,71,79,.08); }

/* ---------- Navigation drawer (mobile) ---------- */
.scrim {
  position: fixed; inset: 0; background: rgba(0,0,0,.32); z-index: 200;
  opacity: 0; pointer-events: none; transition: opacity .25s var(--ease);
}
.drawer {
  position: fixed; top: 0; left: 0; bottom: 0; width: min(320px, 85vw); z-index: 201;
  background: var(--md-surface-container-low);
  border-radius: 0 var(--shape-lg) var(--shape-lg) 0;
  padding: 16px 12px; transform: translateX(-100%);
  transition: transform .3s var(--ease);
}
.drawer .brand { padding: 12px 16px 24px; }
.drawer a.drawer-item {
  display: flex; align-items: center; gap: 12px; height: 56px; padding: 0 16px;
  border-radius: var(--shape-full); color: var(--md-on-surface-variant); font-weight: 500;
}
.drawer a.drawer-item:hover { background: rgba(68,71,79,.08); }
.drawer a.drawer-item.active { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }
body.drawer-open .scrim { opacity: 1; pointer-events: auto; }
body.drawer-open .drawer { transform: none; }

/* ---------- Hero ---------- */
.hero { padding: 72px 0 96px; }
.hero .container { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center; }
.hero p.body-lg { margin: 20px 0 32px; max-width: 540px; font-size: 1.1rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.chip {
  display: inline-flex; align-items: center; gap: 8px; height: 32px; padding: 0 16px 0 8px;
  border-radius: var(--shape-sm); border: 1px solid var(--md-outline-variant);
  font-size: .85rem; font-weight: 500; color: var(--md-on-surface-variant); margin-bottom: 24px;
}
.chip .material-symbols-rounded { font-size: 18px; color: var(--md-primary); }

.hero-visual {
  position: relative; aspect-ratio: 1 / 1; max-width: 480px; justify-self: center; width: 100%;
  border-radius: 48px; background: var(--md-primary-container);
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding: 32px;
}
.hero-tile {
  background: var(--md-surface); border-radius: var(--shape-xl); padding: 24px;
  display: flex; flex-direction: column; justify-content: space-between; box-shadow: var(--elev-1);
}
.hero-tile .material-symbols-rounded { font-size: 36px; color: var(--md-primary); }
.hero-tile:nth-child(2) { background: var(--md-primary); color: var(--md-on-primary); }
.hero-tile:nth-child(2) .material-symbols-rounded { color: var(--md-on-primary); }
.hero-tile:nth-child(3) { background: var(--md-tertiary-container); }
.hero-tile:nth-child(3) .material-symbols-rounded { color: var(--md-tertiary); }

/* ---------- Sections ---------- */
section { padding: 88px 0; }
.section-alt { background: var(--md-surface-container-low); }
.section-head { max-width: 680px; margin-bottom: 48px; }
.section-head.center { text-align: center; margin-left: auto; margin-right: auto; }
.section-head p { margin-top: 12px; }

/* ---------- Cards ---------- */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: var(--md-surface); border-radius: var(--shape-md); padding: 28px;
  transition: box-shadow .25s var(--ease), transform .25s var(--ease);
}
.card-elevated { box-shadow: var(--elev-1); }
.card-elevated:hover { box-shadow: var(--elev-3); transform: translateY(-2px); }
.card-filled { background: var(--md-surface-container-high); }
.card-outlined { border: 1px solid var(--md-outline-variant); }
.card h3 { margin: 16px 0 8px; }
.card p { color: var(--md-on-surface-variant); font-size: .95rem; }
.card .btn-text { margin: 16px 0 0 -12px; }

.icon-container {
  width: 56px; height: 56px; border-radius: var(--shape-lg);
  background: var(--md-primary-container); color: var(--md-on-primary-container);
  display: grid; place-items: center;
}
.icon-container .material-symbols-rounded { font-size: 28px; }

/* ---------- Feature list ---------- */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.list { list-style: none; margin-top: 24px; }
.list li { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--md-outline-variant); }
.list li:last-child { border-bottom: none; }
.list .material-symbols-rounded { color: var(--md-tertiary); margin-top: 2px; }
.list h4 { font-weight: 500; }
.list p { color: var(--md-on-surface-variant); font-size: .93rem; }

.process { counter-reset: step; }
.process .card { position: relative; }
.process .card::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  font-size: 2.5rem; font-weight: 300; color: var(--md-primary); line-height: 1;
}

/* ---------- Page header ---------- */
.page-header { padding: 56px 0 64px; background: var(--md-surface-container-low); }
.page-header .container { max-width: 1200px; }
.page-header p { margin-top: 12px; max-width: 640px; }
.breadcrumb { display: flex; align-items: center; gap: 4px; font-size: .85rem; color: var(--md-on-surface-variant); margin-bottom: 16px; }
.breadcrumb .material-symbols-rounded { font-size: 18px; }

/* ---------- Service detail ---------- */
.service-detail { display: grid; grid-template-columns: 72px 1fr; gap: 24px; padding: 40px 0; border-bottom: 1px solid var(--md-outline-variant); scroll-margin-top: 96px; }
.service-detail:last-child { border-bottom: none; }
.service-detail .icon-container { width: 72px; height: 72px; border-radius: 20px; }
.service-detail .icon-container .material-symbols-rounded { font-size: 36px; }
.service-detail p { color: var(--md-on-surface-variant); margin: 8px 0 16px; max-width: 760px; }
.chip-set { display: flex; flex-wrap: wrap; gap: 8px; }
.chip-set .chip { margin: 0; padding: 0 12px; background: var(--md-surface); }

/* ---------- CTA banner ---------- */
.cta {
  background: var(--md-inverse-surface); color: var(--md-inverse-on-surface);
  border-radius: var(--shape-xl); padding: 56px; text-align: center;
}
.cta p { color: #c4c9d4; margin: 12px auto 28px; max-width: 560px; }
.cta-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.cta .btn-outlined { color: var(--md-inverse-on-surface); border-color: #8e939c; }

/* ---------- Contact ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1.3fr; gap: 48px; align-items: start; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; padding: 20px; border-radius: var(--shape-lg); background: var(--md-surface-container-low); margin-bottom: 12px; }
.contact-item h4 { font-weight: 500; font-size: .85rem; color: var(--md-on-surface-variant); }
.contact-item p, .contact-item a { font-size: 1.05rem; color: var(--md-on-surface); }
.contact-item a:hover { color: var(--md-primary); }

.form-card { background: var(--md-surface); border-radius: var(--shape-xl); padding: 40px; box-shadow: var(--elev-1); }
.form-card > p { color: var(--md-on-surface-variant); margin: 4px 0 28px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* M3 outlined text field */
.text-field { position: relative; margin-bottom: 20px; }
.text-field input, .text-field select, .text-field textarea {
  width: 100%; padding: 16px; font: 400 1rem 'Roboto', sans-serif; color: var(--md-on-surface);
  background: transparent; border: 1px solid var(--md-outline); border-radius: var(--shape-xs);
  outline: none; transition: border-color .15s;
}
.text-field textarea { min-height: 140px; resize: vertical; }
.text-field select { appearance: none; cursor: pointer; }
.text-field label {
  position: absolute; left: 12px; top: 16px; padding: 0 4px; background: var(--md-surface);
  color: var(--md-on-surface-variant); pointer-events: none;
  transition: all .15s var(--ease);
}
.text-field input:focus, .text-field select:focus, .text-field textarea:focus {
  border: 2px solid var(--md-primary); padding: 15px;
}
.text-field input:focus + label, .text-field input:not(:placeholder-shown) + label,
.text-field textarea:focus + label, .text-field textarea:not(:placeholder-shown) + label,
.text-field select + label {
  top: -9px; font-size: .75rem;
}
.text-field :focus + label { color: var(--md-primary); }
.text-field .trailing { position: absolute; right: 12px; top: 16px; pointer-events: none; color: var(--md-on-surface-variant); }
.hidden-field { display: none; }
.btn:disabled { opacity: .6; cursor: progress; }
.form-note { font-size: .8rem; color: var(--md-on-surface-variant); margin-top: 12px; text-align: center; }

.map-wrap { border-radius: var(--shape-xl); overflow: hidden; height: 360px; box-shadow: var(--elev-1); }
.map-wrap iframe { width: 100%; height: 100%; border: 0; }

/* ---------- Snackbar ---------- */
.snackbar {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 120px);
  background: var(--md-inverse-surface); color: var(--md-inverse-on-surface);
  padding: 14px 20px; border-radius: var(--shape-xs); box-shadow: var(--elev-3);
  font-size: .9rem; z-index: 300; transition: transform .3s var(--ease); max-width: calc(100% - 32px);
}
.snackbar.show { transform: translate(-50%, 0); }

/* ---------- FAB ---------- */
.fab {
  position: fixed; right: 24px; bottom: 24px; z-index: 90;
  width: 56px; height: 56px; border-radius: var(--shape-lg);
  background: var(--md-primary-container); color: var(--md-on-primary-container);
  display: grid; place-items: center; box-shadow: var(--elev-3);
  transition: box-shadow .2s, transform .2s var(--ease);
}
.fab:hover { transform: scale(1.05); }

/* ---------- Footer ---------- */
footer { background: var(--md-surface-container); padding: 64px 0 24px; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.4fr; gap: 40px; }
.footer-grid p { color: var(--md-on-surface-variant); font-size: .93rem; margin-top: 16px; max-width: 320px; }
footer h4 { font-size: .875rem; font-weight: 500; margin-bottom: 16px; }
footer ul { list-style: none; }
footer li { margin-bottom: 10px; }
footer li a { color: var(--md-on-surface-variant); font-size: .93rem; }
footer li a:hover { color: var(--md-primary); }
.footer-contact li { display: flex; gap: 10px; color: var(--md-on-surface-variant); font-size: .93rem; }
.footer-contact .material-symbols-rounded { font-size: 20px; color: var(--md-primary); }
.footer-bottom {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
  border-top: 1px solid var(--md-outline-variant); margin-top: 48px; padding-top: 24px;
  font-size: .85rem; color: var(--md-on-surface-variant);
}

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .nav-links, .top-app-bar .btn { display: none; }
  .icon-btn { display: grid; }
  .hero .container, .split, .contact-layout { grid-template-columns: 1fr; }
  .hero { padding: 40px 0 64px; }
  .hero-visual { max-width: 400px; border-radius: 36px; padding: 24px; }
  section { padding: 64px 0; }
}
@media (max-width: 600px) {
  .container { padding: 0 16px; }
  .grid-4, .grid-3, .grid-2, .form-row, .footer-grid { grid-template-columns: 1fr; }
  .form-row { gap: 0; }
  .cta { padding: 40px 24px; }
  .form-card { padding: 28px 20px; }
  .service-detail { grid-template-columns: 1fr; gap: 16px; }
  .hero-tile { padding: 16px; border-radius: 20px; }
  .hero-tile .title-md { font-size: .9rem; }
}