/* Design Brains — Global Styles (light + dark) */

/* ============ DEFAULT: LIGHT ============ */
:root, [data-theme="light"] {
  --bg: #FAFAF7;
  --bg-2: #F4F4EF;
  --surface: #FFFFFF;
  --card: #FFFFFF;
  --card-hover: #FFFFFF;
  --border: rgba(15, 18, 12, 0.08);
  --border-strong: rgba(15, 18, 12, 0.16);
  --fg: #0F120C;
  --fg-2: #2E3329;
  --muted: #6B7066;
  --muted-2: #9DA098;
  --brand: #5BAA00;
  --brand-soft: #82C91E;
  --brand-deep: #3F7800;
  --brand-glow: rgba(91, 170, 0, 0.22);
  --brand-faint: rgba(91, 170, 0, 0.08);
  --danger: #C63131;
  --hero-grad: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(91, 170, 0, 0.10), transparent 60%),
               radial-gradient(ellipse 60% 40% at 100% 30%, rgba(91, 170, 0, 0.05), transparent 60%),
               var(--bg);
  --shadow-card: 0 1px 0 rgba(255,255,255,0.6) inset, 0 1px 2px rgba(15,18,12,0.04), 0 12px 28px -16px rgba(15,18,12,0.12);
  --shadow-card-hover: 0 1px 0 rgba(255,255,255,0.6) inset, 0 1px 2px rgba(15,18,12,0.04), 0 24px 48px -20px rgba(15,18,12,0.18);
  --code-bg: rgba(15, 18, 12, 0.04);
  --logo-fg: #0F120C;
  --nav-bg: rgba(250, 250, 247, 0.78);
}

/* ============ DARK ============ */
[data-theme="dark"] {
  --bg: #0A0C09;
  --bg-2: #0E1110;
  --surface: #11130F;
  --card: rgba(255, 255, 255, 0.03);
  --card-hover: rgba(255, 255, 255, 0.05);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --fg: #F4F5F1;
  --fg-2: #C7CAC1;
  --muted: #8E928A;
  --muted-2: #5C6058;
  --brand: #82C91E;
  --brand-soft: #B5E25C;
  --brand-deep: #5BAA00;
  --brand-glow: rgba(130, 201, 30, 0.32);
  --brand-faint: rgba(130, 201, 30, 0.10);
  --danger: #FF5454;
  --hero-grad: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(130, 201, 30, 0.12), transparent 60%),
               radial-gradient(ellipse 60% 40% at 100% 30%, rgba(130, 201, 30, 0.05), transparent 60%),
               var(--bg);
  --shadow-card: 0 1px 0 rgba(255,255,255,0.04) inset, 0 20px 40px -20px rgba(0,0,0,0.5);
  --shadow-card-hover: 0 1px 0 rgba(255,255,255,0.06) inset, 0 30px 60px -20px rgba(0,0,0,0.7);
  --code-bg: rgba(255, 255, 255, 0.04);
  --logo-fg: #F4F5F1;
  --nav-bg: rgba(10, 12, 9, 0.78);
}

:root {
  --radius-sm: 2px;
  --radius: 2px;
  --radius-lg: 0px;
  --radius-xl: 0px;
  --maxw: 1600px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  font-family: "DM Sans", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "DM Sans", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background 0.4s var(--ease), color 0.4s var(--ease);
}

body {
  background: var(--hero-grad);
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
img { display: block; max-width: 100%; }

::selection { background: var(--brand); color: #FFFFFF; }
[data-theme="dark"] ::selection { color: #0A0C09; }

/* DM Sans throughout — but tighter for display use */
.font-display {
  font-family: "DM Sans", sans-serif;
  font-weight: 600;
  letter-spacing: -0.025em;
  font-feature-settings: "ss01" on, "ss02" on;
}
.font-mono {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  letter-spacing: -0.01em;
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}
@media (max-width: 720px) {
  .container { padding: 0 20px; }
}

/* ============ Buttons (sharper, not pill) ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border-radius: 3px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid transparent;
  transition: all 0.2s var(--ease);
  white-space: nowrap;
  position: relative;
  background: transparent;
  color: var(--fg);
  font-family: inherit;
  letter-spacing: -0.01em;
}
.btn-primary {
  background: var(--brand);
  color: #FFFFFF;
  box-shadow: 0 1px 0 rgba(255,255,255,0.18) inset, 0 8px 20px -8px var(--brand-glow);
}
.btn-primary:hover {
  background: var(--brand-deep);
  transform: translateY(-1px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.18) inset, 0 14px 28px -8px var(--brand-glow);
}
[data-theme="dark"] .btn-primary {
  color: #0A0C09;
}
[data-theme="dark"] .btn-primary:hover {
  background: var(--brand-soft);
}
.btn-ghost {
  background: var(--surface);
  border-color: var(--border-strong);
  color: var(--fg);
}
.btn-ghost:hover {
  border-color: var(--fg-2);
  background: var(--bg-2);
}
[data-theme="dark"] .btn-ghost {
  background: rgba(255,255,255,0.04);
}
[data-theme="dark"] .btn-ghost:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.28);
}
.btn-link {
  padding: 6px 0;
  color: var(--brand);
}
.btn-link:hover { color: var(--brand-deep); }
.btn .arrow {
  display: inline-block;
  transition: transform 0.3s var(--ease);
}
.btn:hover .arrow { transform: translateX(4px); }

/* ============ Type ============ */
.eyebrow {
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--brand);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--brand);
}
h1, h2, h3, h4 {
  font-family: "DM Sans", sans-serif;
  font-weight: 600;
  letter-spacing: -0.025em;
  margin: 0;
  line-height: 1.05;
  text-wrap: balance;
}
.h-display {
  font-size: clamp(44px, 7vw, 88px);
  line-height: 1.0;
  letter-spacing: -0.035em;
  font-weight: 600;
}
.h-section {
  font-size: clamp(34px, 4.5vw, 56px);
  letter-spacing: -0.028em;
  line-height: 1.05;
  font-weight: 600;
}
.h-card {
  font-size: 22px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  font-weight: 600;
}
p.lead {
  font-size: clamp(17px, 1.6vw, 19px);
  line-height: 1.55;
  color: var(--fg-2);
  max-width: 640px;
  text-wrap: pretty;
}
.muted { color: var(--muted); }

/* ============ Cards ============ */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 28px;
  transition: all 0.3s var(--ease);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.card:hover {
  background: var(--card-hover);
  border-color: var(--border-strong);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}
.card-glow::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, var(--brand), transparent 40%);
  -webkit-mask: linear-gradient(#000,#000) content-box, linear-gradient(#000,#000);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s var(--ease);
}
.card-glow:hover::before { opacity: 0.5; }

/* ============ Sections ============ */
section {
  padding: clamp(70px, 10vw, 130px) 0;
  position: relative;
}
.section-header {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 64px;
  max-width: 760px;
}

/* ============ Reveal animation ============ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* ============ Marquee ============ */
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.marquee {
  display: flex;
  gap: 64px;
  animation: marquee 40s linear infinite;
  width: max-content;
}

/* ============ Page transitions ============ */
.page-enter {
  animation: pageEnter 0.5s var(--ease);
}
@keyframes pageEnter {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}

/* ============ Form ============ */
.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.field label {
  font-size: 12px;
  color: var(--muted);
  font-family: "JetBrains Mono", monospace;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.field input, .field textarea, .field select {
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 13px 16px;
  color: var(--fg);
  font-size: 15px;
  font-family: inherit;
  transition: all 0.2s var(--ease);
  outline: none;
}
[data-theme="dark"] .field input, [data-theme="dark"] .field textarea, [data-theme="dark"] .field select {
  background: rgba(255,255,255,0.03);
  border-color: var(--border);
}
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-faint);
}
.field textarea { resize: vertical; min-height: 120px; }

/* ============ Chip ============ */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  background: var(--code-bg);
  border: 1px solid var(--border);
  font-size: 13px;
  color: var(--fg-2);
  font-family: "JetBrains Mono", monospace;
}

/* ============ Divider ============ */
.divider {
  height: 1px;
  background: var(--border);
  margin: 0;
}

/* ============ Mobile menu lock ============ */
body.menu-open { overflow: hidden; }

/* ============ Scrollbar ============ */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

/* utility */
.row { display: flex; }
.col { display: flex; flex-direction: column; }
.gap-8 { gap: 8px; } .gap-12 { gap: 12px; } .gap-16 { gap: 16px; }
.gap-24 { gap: 24px; } .gap-32 { gap: 32px; } .gap-48 { gap: 48px; }
.center { align-items: center; justify-content: center; }
.between { justify-content: space-between; }
.wrap { flex-wrap: wrap; }