/* =====================================================
   ANSTIRE — Global Design System
   Apple-inspired Glassmorphism Dark/Light
   ===================================================== */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@600;700;800&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,400&display=swap');

/* ─── Reset ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: 'DM Sans', sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-primary);
  background: var(--bg-primary);
  transition: background 0.3s ease, color 0.3s ease;
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; outline: none; }
ul { list-style: none; }

/* ─── CSS Variables ──────────────────────────────── */
:root {
  --bg-primary:   #F5F5F7;
  --bg-surface:   #FFFFFF;
  --bg-elevated:  #FAFAFA;
  --text-primary:    #1D1D1F;
  --text-secondary:  #6E6E73;
  --text-tertiary:   #98989D;
  --accent:      #7B61FF;
  --accent-2:    #00C9FF;
  --accent-rgb:  123, 97, 255;
  --accent-2-rgb: 0, 201, 255;
  --glass-bg:    rgba(255, 255, 255, 0.68);
  --glass-border: rgba(255, 255, 255, 0.85);
  --glass-blur:  blur(24px) saturate(180%);
  --shadow-xs:   0 1px 2px rgba(0,0,0,0.04);
  --shadow-sm:   0 2px 8px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:   0 8px 24px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
  --shadow-lg:   0 24px 64px rgba(0,0,0,0.12), 0 4px 16px rgba(0,0,0,0.06);
  --radius-sm:   8px;
  --radius-md:   14px;
  --radius-lg:   20px;
  --radius-xl:   28px;
  --nav-height:  64px;
  --ease:        cubic-bezier(0.4, 0, 0.2, 1);
  --transition:  all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
  --bg-primary:   #000000;
  --bg-surface:   #0D0D0D;
  --bg-elevated:  #161616;
  --text-primary:    #F5F5F7;
  --text-secondary:  #A1A1A6;
  --text-tertiary:   #636366;
  --glass-bg:    rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.09);
  --shadow-xs:   0 1px 2px rgba(0,0,0,0.6);
  --shadow-sm:   0 2px 8px rgba(0,0,0,0.5);
  --shadow-md:   0 8px 24px rgba(0,0,0,0.6);
  --shadow-lg:   0 24px 64px rgba(0,0,0,0.9);
}

/* ─── Particle Canvas ────────────────────────────── */
#particle-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ─── Gradient Orbs ──────────────────────────────── */
.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.14;
  pointer-events: none;
  z-index: 0;
}
[data-theme="dark"] .orb { opacity: 0.07; }
.orb-1 { width: 560px; height: 560px; background: var(--accent); top: -140px; right: -120px; }
.orb-2 { width: 420px; height: 420px; background: var(--accent-2); bottom: -100px; left: -120px; }

/* ─── Page Wrapper ───────────────────────────────── */
.page-wrapper { position: relative; z-index: 1; min-height: 100vh; }

/* ─── Navigation ─────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
  justify-content: center;
}

.nav-links a {
  display: block;
  padding: 6px 13px;
  border-radius: 30px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-links a:hover { color: var(--text-primary); background: rgba(var(--accent-rgb), 0.07); }
.nav-links a.active { color: var(--accent); background: rgba(var(--accent-rgb), 0.1); }

.nav-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

.theme-toggle {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  font-size: 15px;
}
.theme-toggle:hover { background: rgba(var(--accent-rgb), 0.1); transform: scale(1.08); }

.nav-hamburger {
  display: none;
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  transition: var(--transition);
}
.nav-hamburger span { display: block; width: 16px; height: 1.5px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }

.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  z-index: 99;
  padding: 12px 20px 20px;
  flex-direction: column;
  gap: 2px;
}
.nav-mobile.open { display: flex; }
.nav-mobile a { padding: 11px 16px; border-radius: 12px; font-size: 15px; font-weight: 500; color: var(--text-secondary); transition: var(--transition); }
.nav-mobile a:hover { color: var(--text-primary); background: rgba(var(--accent-rgb), 0.07); }

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
}

/* ─── Footer ─────────────────────────────────────── */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--glass-border);
  padding: 56px 24px 32px;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand .footer-logo { font-family: 'Syne', sans-serif; font-weight: 800; font-size: 18px; letter-spacing: -0.04em; background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; display: inline-block; margin-bottom: 12px; }
.footer-brand p { font-size: 13px; color: var(--text-tertiary); line-height: 1.75; max-width: 260px; }

.footer-col h4 { font-size: 11px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-tertiary); margin-bottom: 18px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul a { font-size: 14px; color: var(--text-secondary); transition: var(--transition); }
.footer-col ul a:hover { color: var(--accent); }

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: 1px solid var(--glass-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12.5px;
  color: var(--text-tertiary);
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}

/* ─── Glass Card ─────────────────────────────────── */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
}
.glass-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }

/* ─── Buttons ────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: 40px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: none;
  font-family: inherit;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 4px 20px rgba(var(--accent-rgb), 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(var(--accent-rgb), 0.5); }

.btn-ghost {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}
.btn-ghost:hover { background: rgba(var(--accent-rgb), 0.08); border-color: rgba(var(--accent-rgb), 0.35); transform: translateY(-2px); }

.btn-sm { padding: 8px 18px; font-size: 13px; }

/* ─── Typography ─────────────────────────────────── */
.display-1 { font-family: 'Syne', sans-serif; font-weight: 800; font-size: clamp(52px, 9vw, 104px); line-height: 0.96; letter-spacing: -0.04em; }
.display-2 { font-family: 'Syne', sans-serif; font-weight: 700; font-size: clamp(36px, 6vw, 64px); line-height: 1.08; letter-spacing: -0.03em; }
.heading-1 { font-family: 'Syne', sans-serif; font-weight: 700; font-size: clamp(26px, 4vw, 42px); letter-spacing: -0.025em; }
.heading-2 { font-family: 'Syne', sans-serif; font-weight: 600; font-size: clamp(20px, 3vw, 28px); letter-spacing: -0.015em; }
.heading-3 { font-family: 'Syne', sans-serif; font-weight: 600; font-size: 18px; letter-spacing: -0.01em; }

.gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.label-tag { font-size: 11px; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-tertiary); }

/* ─── Pill Tag ───────────────────────────────────── */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: 30px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(var(--accent-rgb), 0.1);
  color: var(--accent);
  border: 1px solid rgba(var(--accent-rgb), 0.22);
}

/* ─── Layout Helpers ─────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 88px 24px; max-width: 1200px; margin: 0 auto; }
.page-header { padding: calc(var(--nav-height) + 80px) 24px 64px; max-width: 1200px; margin: 0 auto; }

.divider { height: 1px; background: var(--glass-border); margin: 48px 0; }

/* ─── Form Inputs ────────────────────────────────── */
.input {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  background: var(--bg-surface);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 14px;
  transition: var(--transition);
  outline: none;
}
.input:focus { border-color: rgba(var(--accent-rgb), 0.55); box-shadow: 0 0 0 3px rgba(var(--accent-rgb), 0.1); }
.input::placeholder { color: var(--text-tertiary); }
textarea.input { resize: vertical; min-height: 120px; line-height: 1.6; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--text-secondary); margin-bottom: 8px; }

select.input { cursor: pointer; }
select.input option { background: var(--bg-surface); color: var(--text-primary); }

/* ─── Animations ─────────────────────────────────── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(28px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }
@keyframes glow { 0%, 100% { box-shadow: 0 0 20px rgba(var(--accent-rgb), 0.3); } 50% { box-shadow: 0 0 40px rgba(var(--accent-rgb), 0.6); } }
@keyframes spin { to { transform: rotate(360deg); } }

.anim { opacity: 0; animation: fadeUp 0.65s var(--ease) forwards; }
.d1 { animation-delay: 0.08s; } .d2 { animation-delay: 0.18s; } .d3 { animation-delay: 0.28s; } .d4 { animation-delay: 0.38s; } .d5 { animation-delay: 0.48s; }

/* ─── Code ───────────────────────────────────────── */
code { font-family: 'SF Mono', 'Fira Code', monospace; font-size: 0.875em; background: rgba(var(--accent-rgb), 0.08); color: var(--accent); padding: 2px 7px; border-radius: 5px; }
pre { background: var(--bg-elevated); border: 1px solid var(--glass-border); border-radius: var(--radius-md); padding: 22px; overflow-x: auto; font-family: 'SF Mono', 'Fira Code', monospace; font-size: 13px; line-height: 1.75; color: var(--text-secondary); }

/* ─── Scrollbar ──────────────────────────────────── */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text-tertiary); border-radius: 4px; }

/* ─── Selection ──────────────────────────────────── */
::selection { background: rgba(var(--accent-rgb), 0.22); color: var(--accent); }

/* ─── Responsive ─────────────────────────────────── */
@media (max-width: 768px) {
  .section { padding: 64px 20px; }
  .page-header { padding: calc(var(--nav-height) + 48px) 20px 48px; }
  .btn { padding: 11px 22px; }
}