/* ==========================================================================
   Miloop AI: style.css
   Design tokens follow the "closed loop" concept: build, verify, deploy,
   iterate. Colors and the ring motif exist to carry that idea, not to
   decorate the page.
   ========================================================================== */

:root {
  /* --- Color tokens --- */
  --bg-void: #0A0B14;
  --bg-panel: #141625;
  --bg-panel-raised: #1B1E33;
  --ink: #E9E7F5;
  --ink-dim: #8D8BA8;
  --ink-faint: #57597A;
  --loop-indigo: #5B6EF5;
  --loop-violet: #A66CF0;
  --signal-mint: #5EE6C8;
  --border-soft: rgba(233, 231, 245, 0.09);
  --border-strong: rgba(233, 231, 245, 0.18);

  /* --- Type --- */
  --font-display: 'Fraunces', 'Noto Serif SC', serif;
  --font-body: 'IBM Plex Sans', 'Noto Sans SC', -apple-system, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'SFMono-Regular', monospace;

  /* --- Spacing / layout --- */
  --max-width: 1180px;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6.5rem;
  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 28px;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

body {
  margin: 0;
  background: var(--bg-void);
  background-image:
    radial-gradient(ellipse 900px 500px at 15% -10%, rgba(91, 110, 245, 0.16), transparent 60%),
    radial-gradient(ellipse 700px 500px at 100% 10%, rgba(166, 108, 240, 0.10), transparent 60%);
  background-repeat: no-repeat;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, p { margin: 0; }

:focus-visible {
  outline: 2px solid var(--loop-indigo);
  outline-offset: 3px;
  border-radius: 2px;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--loop-violet);
}

h1, h2, h3 { font-family: var(--font-display); font-weight: 600; letter-spacing: -0.01em; }

h2.section-title {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  font-weight: 300;
  margin-top: var(--space-1);
  max-width: 40ch;
}

.section-lede {
  color: var(--ink-dim);
  max-width: 56ch;
  margin-top: var(--space-2);
  font-size: 1.02rem;
}

section { padding: var(--space-6) 0; }
section + section { border-top: 1px solid var(--border-soft); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.95rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.btn-primary {
  background: linear-gradient(120deg, var(--loop-indigo), var(--loop-violet));
  color: #07070C;
  font-weight: 600;
}
.btn-primary:hover { transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--ink);
}
.btn-ghost:hover { border-color: var(--loop-indigo); }

/* ==========================================================================
   Nav
   ========================================================================== */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: rgba(10, 11, 20, 0.72);
  border-bottom: 1px solid var(--border-soft);
}
.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}
.wordmark {
  display: inline-flex;
  align-items: center;
}
.wordmark-full {
  height: 34px;
  width: auto;
  display: block;
}

.lang-switch { position: relative; }
.lang-switch-btn {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-dim);
  background: transparent;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 0.35rem 0.7rem;
  cursor: pointer;
}
.lang-switch-btn:hover { color: var(--ink); border-color: var(--loop-indigo); }
.lang-caret { transition: transform 0.15s ease; }
.lang-switch.open .lang-caret { transform: rotate(180deg); }

.lang-switch-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 150px;
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  padding: 0.4rem;
  display: none;
  flex-direction: column;
  gap: 0.15rem;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
  z-index: 60;
}
.lang-switch.open .lang-switch-menu { display: flex; }
.lang-option {
  text-align: left;
  background: transparent;
  border: none;
  color: var(--ink-dim);
  padding: 0.55rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: 0.9rem;
}
.lang-option:hover { background: var(--bg-panel-raised); color: var(--ink); }
.lang-option.active { color: var(--loop-violet); font-weight: 600; }

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

@media (max-width: 480px) {
  .wordmark-full { height: 26px; }
  .nav-actions { gap: 0.5rem; }
  .nav-actions .btn { padding: 0.55rem 0.9rem; font-size: 0.85rem; }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: var(--space-5);
  align-items: center;
}
.hero h1 {
  font-size: clamp(2.3rem, 4.4vw, 3.6rem);
  font-weight: 300;
  line-height: 1.12;
  margin-top: var(--space-2);
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--loop-indigo), var(--loop-violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  margin-top: var(--space-3);
  color: var(--ink-dim);
  font-size: 1.08rem;
  max-width: 46ch;
}

.loop-stage-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  fill: var(--ink-dim);
}
.loop-stage-label.active { fill: var(--ink); }

.loop-track { fill: none; stroke: var(--border-strong); stroke-width: 2; }
.loop-glow {
  fill: none;
  stroke: url(#heroGrad);
  stroke-width: 3.5;
  stroke-linecap: round;
  stroke-dasharray: 125.9 660.7;
}
@media (prefers-reduced-motion: no-preference) {
  .loop-glow { animation: loop-travel 9s linear infinite; }
  .loop-node-pulse { animation: node-pulse 4.5s ease-in-out infinite; }
}
@keyframes loop-travel {
  to { stroke-dashoffset: -786.59; }
}
@keyframes node-pulse {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 1; }
}
.loop-node circle.node-dot {
  fill: var(--bg-panel);
  stroke: var(--border-strong);
  stroke-width: 2;
}
.loop-node-icon { stroke: var(--ink); }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Services (interactive selector + detail panel)
   ========================================================================== */
.service-interactive {
  margin-top: var(--space-4);
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: var(--space-4);
  align-items: start;
}

.service-menu { display: flex; flex-direction: column; gap: 0.4rem; }
.service-menu-item {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  width: 100%;
  text-align: left;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  cursor: pointer;
  font-family: var(--font-body);
  color: var(--ink-dim);
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}
.service-menu-item:hover { background: var(--bg-panel); color: var(--ink); }
.service-menu-item.active {
  background: var(--bg-panel);
  border-color: var(--loop-indigo);
  color: var(--ink);
}
.service-menu-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--loop-violet);
  flex-shrink: 0;
  width: 24px;
}
.service-menu-title { font-size: 0.98rem; font-weight: 500; line-height: 1.3; }

.service-panel { position: relative; min-height: 220px; }
.service-panel-item {
  display: none;
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
}
.service-panel-item.active {
  display: block;
  animation: servicePanelIn 0.35s ease;
}
@media (prefers-reduced-motion: reduce) {
  .service-panel-item.active { animation: none; }
}
@keyframes servicePanelIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}
.service-panel-item h3 { font-size: 1.4rem; font-weight: 600; margin-bottom: 1rem; }
.service-panel-item p { color: var(--ink-dim); font-size: 1.02rem; line-height: 1.7; max-width: 66ch; }
.service-panel-item p strong { color: var(--ink); font-weight: 600; }

@media (max-width: 820px) {
  .service-interactive { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Results (merged proof + work showcase)
   ========================================================================== */
.result-grid {
  margin-top: var(--space-5);
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}
.result-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color 0.15s ease, transform 0.15s ease;
}
.result-card:hover { border-color: var(--loop-indigo); transform: translateY(-2px); }

.result-visual {
  aspect-ratio: 16 / 10;
  position: relative;
  overflow: hidden;
  background: var(--bg-panel-raised);
}
.result-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.result-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 11, 20, 0.18) 0%, rgba(10, 11, 20, 0.28) 55%, rgba(20, 22, 37, 0.96) 100%);
  pointer-events: none;
}

.result-body { padding: var(--space-3); display: flex; flex-direction: column; gap: 0.5rem; flex: 1; }
.result-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--loop-violet);
}
.result-body h3 { font-size: 1.1rem; font-weight: 600; font-family: var(--font-body); }
.result-body p { color: var(--ink-dim); font-size: 0.93rem; line-height: 1.6; }
.result-body p strong { color: var(--signal-mint); font-weight: 600; }

@media (max-width: 820px) {
  .result-grid { grid-template-columns: 1fr; }
}

/* ==========================================================================
   About teaser
   ========================================================================== */
.teaser-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}
.teaser-panel .eyebrow { display: block; margin-bottom: var(--space-2); }
.teaser-statement {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  line-height: 1.4;
  color: var(--ink);
}
.teaser-actions {
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  flex-wrap: wrap;
}
@media (max-width: 820px) {
  .teaser-panel { padding: var(--space-4); }
}

/* ==========================================================================
   About page
   ========================================================================== */
.about-hero { padding-top: var(--space-5); padding-bottom: var(--space-4); }
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-dim);
  margin-bottom: var(--space-3);
}
.back-link:hover { color: var(--ink); }
.about-h1 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.7rem, 3.2vw, 2.5rem);
  line-height: 1.3;
  max-width: 26ch;
  margin-top: var(--space-2);
}
.about-body { padding-top: var(--space-2); }
.about-content { max-width: 700px; }
.about-content p {
  color: var(--ink-dim);
  font-size: 1.05rem;
  line-height: 1.75;
  margin-bottom: var(--space-3);
}
.about-pullquote {
  margin: var(--space-4) 0;
  padding-left: var(--space-3);
  border-left: 2px solid var(--loop-indigo);
  font-family: var(--font-display);
  font-weight: 300;
  font-style: normal;
  font-size: clamp(1.4rem, 2.4vw, 1.8rem);
  line-height: 1.4;
  color: var(--ink);
}
.about-divider {
  border: none;
  border-top: 1px solid var(--border-soft);
  margin: var(--space-5) 0;
}
.about-content .eyebrow { margin-bottom: var(--space-2); }
.about-aside {
  font-style: italic;
  color: var(--ink-faint);
  font-size: 0.95rem;
  margin-top: var(--space-3);
}

/* --- Scroll reveal --- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }
.result-card.reveal:nth-child(1) { transition-delay: 0s; }
.result-card.reveal:nth-child(2) { transition-delay: 0.08s; }
.result-card.reveal:nth-child(3) { transition-delay: 0.16s; }

/* --- Footer --- */
.site-footer {
  border-top: 1px solid var(--border-soft);
  padding: var(--space-4) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--ink-faint);
  font-size: 0.85rem;
  position: relative;
  overflow: hidden;
}
.footer-mark {
  position: absolute;
  right: -60px;
  top: -140px;
  width: 320px;
  height: 320px;
  opacity: 0.05;
  pointer-events: none;
}