/* ─────────────────────────────────────────
   Design tokens
───────────────────────────────────────── */
:root {
  --amber:    #d97706;
  --amber-d:  #b45309;
  --amber-l:  #fbbf24;
  --violet:   #7c3aed;
  --violet-l: #a78bfa;
  --cream:    #fffbf5;
  --white:    #ffffff;
  --text-h:   #1c1007;
  --text-b:   #4b5563;
  --text-s:   #9ca3af;
  --border:   #f0e8d8;
}

/* ─────────────────────────────────────────
   Reset & base
───────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--white);
  color: var(--text-b);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ─────────────────────────────────────────
   Header
───────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  padding: 16px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
  backdrop-filter: blur(12px);
  background: rgba(255, 251, 245, .88);
  border-bottom: 1px solid transparent;
  transition: border-color .3s;
}
.site-header.scrolled { border-bottom-color: var(--border); }

.logo {
  font-weight: 900;
  font-size: 16px;
  color: var(--text-h);
  letter-spacing: -.5px;
  text-decoration: none;
}
.logo span { color: var(--amber); }

.site-nav { display: flex; gap: 28px; font-size: 13px; }
.site-nav a {
  position: relative;
  color: var(--text-b);
  text-decoration: none;
  transition: color .2s;
}
.site-nav a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 100%; height: 1.5px;
  background: linear-gradient(90deg, var(--amber), var(--violet));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}
.site-nav a:hover { color: var(--text-h); }
.site-nav a:hover::after { transform: scaleX(1); }

.lang-sw { display: flex; gap: 4px; font-size: 12px; }
.lang-sw a {
  color: var(--text-s);
  text-decoration: none;
  cursor: pointer;
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid transparent;
  transition: all .2s;
}
.lang-sw a.active {
  color: var(--amber);
  background: rgba(217, 119, 6, .08);
  border-color: rgba(217, 119, 6, .2);
  font-weight: 600;
}
.lang-sw a:hover { color: var(--text-h); }

/* ─────────────────────────────────────────
   Sections
───────────────────────────────────────── */
section { padding: 100px 48px; }

.section-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 3px;
  font-weight: 700;
  color: var(--amber);
  margin-bottom: 10px;
}
.section-h {
  font-size: 34px;
  font-weight: 900;
  color: var(--text-h);
  letter-spacing: -1px;
  line-height: 1.2;
  margin-bottom: 8px;
}

/* ─────────────────────────────────────────
   Hero
───────────────────────────────────────── */
#hero {
  min-height: 100vh;
  background: var(--cream);
  display: flex;
  align-items: center;
  padding-top: 120px;
  position: relative;
  overflow: hidden;
}

.hero-mesh {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 65% 60% at 96% 4%,  rgba(251, 191, 36, .45) 0%, transparent 55%),
    radial-gradient(ellipse 50% 50% at 2%  97%, rgba(124, 58, 237, .28) 0%, transparent 50%),
    radial-gradient(ellipse 35% 35% at 55% 55%, rgba(244, 114, 182, .08) 0%, transparent 45%);
}

.hero-ghost {
  position: absolute;
  top: -20px; left: -12px;
  width: clamp(260px, 38vw, 500px);
  height: auto;
  overflow: visible;
  pointer-events: none;
  user-select: none;
}

.hero-vline {
  position: absolute;
  top: 0; left: 48px;
  width: 3px;
  height: 38%;
  background: linear-gradient(to bottom, var(--amber), transparent);
}

.hero-inner {
  max-width: 860px;
  margin: 0 auto;
  width: 100%;
  position: relative;
}

.hero-tag {
  display: inline-block;
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--amber-d);
  background: rgba(217, 119, 6, .08);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 22px;
}

h1 {
  font-size: clamp(38px, 6.5vw, 76px);
  font-weight: 900;
  color: var(--text-h);
  line-height: 1.05;
  letter-spacing: -2.5px;
  margin-bottom: 20px;
}
h1 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--amber), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: 17px;
  max-width: 500px;
  color: var(--text-b);
  line-height: 1.75;
  margin-bottom: 34px;
}

.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }

.btn-primary {
  padding: 13px 30px;
  background: linear-gradient(135deg, var(--amber), var(--amber-d));
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  border-radius: 8px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  box-shadow: 0 4px 20px rgba(217, 119, 6, .32);
  transition: transform .15s, box-shadow .15s;
  display: inline-block;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(217, 119, 6, .42);
}

.btn-ghost {
  padding: 13px 28px;
  border: 1.5px solid var(--border);
  color: var(--text-b);
  font-size: 14px;
  text-decoration: none;
  border-radius: 8px;
  transition: border-color .2s, color .2s;
  display: inline-block;
}
.btn-ghost:hover { border-color: var(--amber); color: var(--text-h); }

.scroll-hint {
  position: absolute;
  bottom: 40px; left: 50%;
  transform: translateX(-50%);
  transition: opacity .5s, transform .5s;
}
.scroll-hint.hidden {
  opacity: 0 !important;
  transform: translateX(-50%) translateY(8px);
  pointer-events: none;
}

/* Desktop: mouse icon */
.scroll-mouse {
  width: 24px;
  height: 38px;
  border: 1.5px solid rgba(217, 119, 6, .35);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
}
.scroll-mouse-dot {
  width: 3px;
  height: 7px;
  background: var(--amber);
  border-radius: 2px;
  animation: scrollDot 1.7s ease-in-out infinite;
}
@keyframes scrollDot {
  0%   { transform: translateY(0);    opacity: 1; }
  55%  { transform: translateY(13px); opacity: 0; }
  56%  { transform: translateY(0);    opacity: 0; }
  100% { transform: translateY(0);    opacity: 1; }
}

/* Mobile: tap & swipe icon */
.scroll-tap {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.scroll-tap-circle {
  position: relative;
  width: 30px;
  height: 30px;
  background: rgba(217,119,6,.12);
  border: 1.5px solid rgba(217,119,6,.45);
  border-radius: 50%;
  animation: tap-press 2.2s ease-in-out infinite;
}
.scroll-tap-ripple {
  position: absolute;
  inset: -5px;
  border-radius: 50%;
  border: 1.5px solid rgba(217,119,6,.25);
  animation: tap-ripple 2.2s ease-in-out infinite;
}
.scroll-tap-arrow {
  width: 1.5px;
  height: 18px;
  background: linear-gradient(to bottom, rgba(217,119,6,.5), transparent);
  border-radius: 1px;
  position: relative;
  animation: tap-arrow-fade 2.2s ease-in-out infinite;
}
.scroll-tap-arrow::after {
  content: '';
  position: absolute;
  bottom: 0; left: -4px;
  width: 9px; height: 9px;
  border-right: 1.5px solid rgba(217,119,6,.4);
  border-bottom: 1.5px solid rgba(217,119,6,.4);
  transform: rotate(45deg) translate(-2px, -2px);
}
@keyframes tap-press {
  0%   { transform: translateY(0)    scale(1); }
  18%  { transform: translateY(3px)  scale(.82); }
  32%  { transform: translateY(0)    scale(1); }
  58%  { transform: translateY(18px) scale(1); }
  74%  { transform: translateY(18px) scale(.82); }
  88%  { transform: translateY(18px) scale(1); }
  100% { transform: translateY(0)    scale(1); }
}
@keyframes tap-ripple {
  0%, 100% { transform: scale(.7); opacity: .5; }
  35%       { transform: scale(1.7); opacity: 0; }
}
@keyframes tap-arrow-fade {
  0%, 45%  { opacity: 0; }
  60%, 85% { opacity: 1; }
  100%     { opacity: 0; }
}

/* ─────────────────────────────────────────
   About
───────────────────────────────────────── */
#about { background: var(--white); }

.about-inner {
  max-width: 860px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-text h2 {
  font-size: 32px;
  font-weight: 900;
  color: var(--text-h);
  letter-spacing: -1px;
  line-height: 1.2;
  margin-bottom: 18px;
}
.about-text p { font-size: 15px; line-height: 1.85; margin-bottom: 14px; }

.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stat {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--cream);
}
.stat-num { font-size: 34px; font-weight: 900; line-height: 1; }
.stat-num.amber  { color: var(--amber); }
.stat-num.violet { color: var(--violet); }
.stat-label { font-size: 11px; color: var(--text-s); margin-top: 5px; }

/* ─────────────────────────────────────────
   Stack / Mindmap
───────────────────────────────────────── */
#stack { background: var(--cream); }

.stack-inner { max-width: 900px; margin: 0 auto; width: 100%; }

.section-sub {
  font-size: 13px;
  color: var(--text-s);
  font-style: italic;
  margin-bottom: 44px;
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.sk-tile {
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  transition: box-shadow .2s, transform .15s;
}
.sk-tile:hover { box-shadow: 0 6px 20px rgba(0,0,0,.08); transform: translateY(-2px); }
.sk-tile.amber.active  { border-color: var(--amber);  box-shadow: 0 0 0 2px rgba(217,119,6,.15); }
.sk-tile.violet.active { border-color: var(--violet); box-shadow: 0 0 0 2px rgba(124,58,237,.15); }

.sk-stripe { height: 4px; }
.sk-tile.amber  .sk-stripe { background: linear-gradient(90deg, var(--amber), var(--amber-l)); }
.sk-tile.violet .sk-stripe { background: linear-gradient(90deg, var(--violet), var(--violet-l)); }

.sk-inner { padding: 16px; }
.sk-name { font-size: 14px; font-weight: 700; color: var(--text-h); margin-bottom: 6px; }
.sk-tags { font-size: 11px; color: var(--text-s); line-height: 1.5; }

.sk-panel { grid-column: 1 / -1; display: none; }
.sk-panel.open { display: block; animation: sk-slide-down .2s ease; }

.sk-panel-item { display: none; }
.sk-panel-item.active {
  display: block;
  background: var(--cream);
  border: 1.5px solid var(--border);
  border-radius: 14px;
  padding: 22px 24px;
}

.sk-panel-title { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.amber-title  { color: var(--amber-d); }
.violet-title { color: var(--violet);  }
.sk-panel-text { font-size: 13px; color: var(--text-b); line-height: 1.75; margin-bottom: 14px; }

@keyframes sk-slide-down {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.dp-tags  { display: flex; flex-wrap: wrap; gap: 4px; }
.dp-tag   { font-size: 11px; padding: 2px 8px; border-radius: 10px; }
.amber-tag  { background: rgba(217, 119, 6,  .1); color: var(--amber-d); }
.violet-tag { background: rgba(124, 58, 237, .1); color: var(--violet);  }

/* ─────────────────────────────────────────
   Services
───────────────────────────────────────── */
#services { background: var(--white); }

.services-inner { max-width: 860px; margin: 0 auto; width: 100%; }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 44px;
}

.service-card {
  padding: 26px 22px;
  border: 1.5px solid var(--border);
  border-radius: 14px;
  background: var(--cream);
  position: relative;
  overflow: hidden;
  transition: border-color .3s, transform .2s, box-shadow .3s;
  cursor: default;
}
.service-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--amber), var(--violet));
  transform: scaleX(0);
  transition: transform .35s;
}
.service-card:hover {
  border-color: rgba(217, 119, 6, .25);
  transform: translateY(-4px);
  box-shadow: 0 10px 30px rgba(217, 119, 6, .1);
}
.service-card:hover::before { transform: scaleX(1); }

.service-icon { font-size: 26px; margin-bottom: 14px; }
.service-card h3 { font-size: 15px; font-weight: 700; color: var(--text-h); margin-bottom: 8px; }
.service-card p  { font-size: 13px; line-height: 1.75; }

/* ─────────────────────────────────────────
   Contact
───────────────────────────────────────── */
#contact { background: var(--cream); }

.contact-inner {
  max-width: 600px;
  margin: 0 auto;
  width: 100%;
  text-align: center;
}
.contact-inner h2 {
  font-size: 34px;
  font-weight: 900;
  color: var(--text-h);
  letter-spacing: -1px;
  margin-bottom: 14px;
}
.contact-inner > p { font-size: 15px; margin-bottom: 36px; }

.form { display: flex; flex-direction: column; gap: 14px; text-align: left; }
.form input,
.form textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  color: var(--text-h);
  font-family: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color .2s;
  resize: vertical;
}
.form input:focus,
.form textarea:focus { border-color: var(--amber); }
.form textarea { min-height: 100px; }

#form-success {
  display: none;
  text-align: center;
  color: var(--amber);
  font-size: 14px;
  font-weight: 600;
  padding: 8px 0;
}

/* ─────────────────────────────────────────
   Footer
───────────────────────────────────────── */
footer {
  text-align: center;
  padding: 28px 48px;
  font-size: 12px;
  color: var(--text-s);
  border-top: 1px solid var(--border);
  background: var(--white);
}
footer span { color: var(--amber); }

/* ─────────────────────────────────────────
   Scroll reveal
───────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .65s ease, transform .65s ease;
}
.reveal-left {
  opacity: 0;
  transform: translateX(-28px);
  transition: opacity .65s ease, transform .65s ease;
}
.reveal-right {
  opacity: 0;
  transform: translateX(28px);
  transition: opacity .65s ease, transform .65s ease;
}
.reveal.visible,
.reveal-left.visible,
.reveal-right.visible { opacity: 1; transform: none; }

/* ─────────────────────────────────────────
   Accordion (mobile stack)
───────────────────────────────────────── */
.stack-accordion { display: none; }

.acc-item {
  border: 1.5px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 8px;
  background: var(--cream);
}

.acc-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 18px;
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-h);
  text-align: left;
  transition: background .2s;
}
.acc-header:hover { background: rgba(217,119,6,.04); }

.acc-header.acc-amber { border-left: 3px solid var(--amber); }
.acc-header.acc-violet { border-left: 3px solid var(--violet); }

.acc-arrow {
  flex-shrink: 0;
  color: var(--text-s);
  transition: transform .25s ease;
}
.acc-item.open .acc-arrow { transform: rotate(180deg); }

.acc-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.acc-item.open .acc-body { max-height: 400px; }

.acc-text {
  font-size: 13px;
  line-height: 1.75;
  color: var(--text-b);
  padding: 0 18px 14px;
}

/* ─────────────────────────────────────────
   Mobile nav
───────────────────────────────────────── */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.burger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text-h);
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
}
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mob-nav {
  display: none;
  position: fixed;
  top: 53px; left: 0; right: 0;
  background: var(--cream);
  border-bottom: 1px solid var(--border);
  padding: 8px 24px 16px;
  z-index: 99;
  flex-direction: column;
}
.mob-nav.open { display: flex; }

.mob-link {
  display: block;
  padding: 14px 0;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-h);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: color .15s;
}
.mob-link:last-child { border-bottom: none; }
.mob-link:active { color: var(--amber); }
.mob-link-tools {
  color: var(--amber-d);
  margin-top: 4px;
}

/* ─────────────────────────────────────────
   Responsive
───────────────────────────────────────── */
@media (max-width: 768px) {
  .site-header { padding: 12px 20px; }
  .site-nav     { display: none; }
  .burger       { display: flex; }
  section       { padding: 72px 20px; }

  .hero-ghost   { font-size: 120px; }
  .hero-vline   { left: 20px; }

  .about-inner  { grid-template-columns: 1fr; gap: 40px; }

  .scroll-mouse { display: none; }
  .scroll-tap    { display: flex; }

  .stack-grid { display: none; }
  .stack-accordion { display: block; margin-top: 24px; }

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