/* ============================================================
   15 anos · Manu — Alice no País das Maravilhas (cyber-fairy)
   Tema dark (vinho quase preto) + light (prata/gelo)
   ============================================================ */

:root {
  /* fonts (overridable via tweaks) */
  --font-display: "Cormorant Garamond", Georgia, serif;
  --font-ui: "Space Grotesk", system-ui, sans-serif;

  /* accent — holographic cyan (overridable) */
  --accent: 199 80% 70%;          /* hsl parts */
  --accent-hex: #7fd3ec;
  --accent-soft: rgba(127, 211, 236, 0.16);
  --accent-glow: rgba(127, 211, 236, 0.55);

  --wine: #7d1f3f;
  --wine-bright: #a32a52;

  --suit-red: var(--silver-1);
  --suit-red-soft: color-mix(in srgb, var(--silver-1) 32%, transparent);

  --particle-density: 1;
}

/* ---------- DARK (default) — azul da Alice (azul-meia-noite) ---------- */
:root,
[data-theme="dark"] {
  --bg-0: #060a14;
  --bg-1: #0a1124;
  --bg-2: #0f1a33;
  --surface: rgba(150, 185, 235, 0.05);
  --surface-2: rgba(150, 185, 235, 0.085);
  --border: rgba(180, 205, 240, 0.13);
  --border-strong: rgba(180, 205, 240, 0.24);
  --text: #eef3fb;
  --text-dim: #a6b4cc;
  --text-faint: #6c7894;
  --silver-1: #f4f6fb;
  --silver-2: #c4ccdd;
  --silver-3: #8b94aa;
  --glass-blur: 18px;
  --shadow: 0 24px 60px -24px rgba(2, 6, 16, 0.9);
  color-scheme: dark;
}

/* ---------- LIGHT (prata / gelo azulado) ---------- */
[data-theme="light"] {
  --bg-0: #e8edf6;
  --bg-1: #e2e9f5;
  --bg-2: #d6e0f1;
  --surface: rgba(255, 255, 255, 0.58);
  --surface-2: rgba(255, 255, 255, 0.8);
  --border: rgba(40, 60, 100, 0.14);
  --border-strong: rgba(40, 60, 100, 0.26);
  --text: #16243f;
  --text-dim: #51607d;
  --text-faint: #8893ab;
  --silver-1: #22314f;
  --silver-2: #46557d;
  --silver-3: #6c7a96;
  --accent: 199 72% 44%;
  --accent-hex: #1f9ec4;
  --accent-soft: rgba(31, 158, 196, 0.12);
  --accent-glow: rgba(31, 158, 196, 0.4);
  --glass-blur: 14px;
  --shadow: 0 22px 50px -26px rgba(40, 22, 32, 0.4);
  color-scheme: light;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-ui);
  background: var(--bg-0);
  color: var(--text);
  line-height: 1.55;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background 0.6s ease, color 0.4s ease;
}

/* ambient page background gradients */
.app-bg {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background:
    radial-gradient(120% 80% at 78% -5%, var(--accent-soft), transparent 55%),
    radial-gradient(95% 75% at 6% 108%, rgba(72, 120, 205, 0.26), transparent 62%),
    linear-gradient(180deg, var(--bg-1), var(--bg-0) 58%, var(--bg-2));
  transition: background 0.6s ease;
}
[data-theme="light"] .app-bg {
  background:
    radial-gradient(120% 80% at 78% -5%, var(--accent-soft), transparent 55%),
    radial-gradient(95% 75% at 6% 108%, rgba(120, 160, 220, 0.3), transparent 62%),
    linear-gradient(180deg, var(--bg-1), var(--bg-0) 58%, var(--bg-2));
}
/* aurora azul lenta — magia ambiente */
.app-bg::after {
  content: ""; position: absolute; inset: -20%;
  background:
    radial-gradient(40% 38% at 30% 30%, var(--accent-soft), transparent 60%),
    radial-gradient(38% 34% at 72% 64%, rgba(90, 135, 215, 0.16), transparent 60%);
  filter: blur(30px);
  animation: aurora 26s ease-in-out infinite alternate;
}
[data-theme="light"] .app-bg::after { opacity: 0.7; }
@keyframes aurora {
  0%   { transform: translate3d(-4%, -2%, 0) scale(1); }
  50%  { transform: translate3d(5%, 3%, 0) scale(1.08); }
  100% { transform: translate3d(-2%, 4%, 0) scale(1.04); }
}

/* particles canvas */
#particles {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
}

::selection { background: var(--accent-glow); color: #0c0509; }

/* ---------- typography helpers ---------- */
.display {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.02;
  letter-spacing: -0.01em;
}
.serif-italic { font-family: var(--font-display); font-style: italic; font-weight: 500; }
.eyebrow {
  font-family: var(--font-ui);
  text-transform: uppercase;
  letter-spacing: 0.32em;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--accent-hex);
}
.muted { color: var(--text-dim); }

a { color: inherit; }

/* ---------- buttons ---------- */
.btn {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  border: none;
  border-radius: 999px;
  padding: 15px 26px;
  min-height: 52px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: transform 0.25s cubic-bezier(.2,.8,.2,1), box-shadow 0.3s, background 0.3s, border-color 0.3s;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }

/* silver metallic CTA */
.btn-silver {
  color: #1a0e16;
  background: linear-gradient(135deg, #f6f7fb 0%, #c9cdda 38%, #f3f4f9 55%, #aab0c2 100%);
  box-shadow: 0 10px 26px -10px rgba(190,196,214,0.6), inset 0 1px 0 rgba(255,255,255,0.8);
}
.btn-silver::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(115deg, transparent 35%, rgba(255,255,255,0.85) 48%, transparent 60%);
  transform: translateX(-120%); transition: transform 0.7s ease;
}
.btn-silver:hover::after { transform: translateX(120%); }
.btn-silver:hover { transform: translateY(-2px); box-shadow: 0 16px 34px -12px rgba(190,196,214,0.75), inset 0 1px 0 rgba(255,255,255,0.9); }

/* ghost / glass */
.btn-ghost {
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(var(--glass-blur));
}
.btn-ghost:hover {
  border-color: var(--accent-hex);
  box-shadow: 0 0 0 1px var(--accent-glow), 0 0 24px -6px var(--accent-glow);
  transform: translateY(-2px);
}

/* accent glow */
.btn-accent {
  color: #07181d;
  background: linear-gradient(135deg, hsl(var(--accent)), color-mix(in srgb, var(--accent-hex) 75%, #fff));
  box-shadow: 0 0 28px -6px var(--accent-glow);
}
.btn-accent:hover { transform: translateY(-2px); box-shadow: 0 0 40px -4px var(--accent-glow); }

.btn-wine {
  color: #fff;
  background: linear-gradient(135deg, var(--wine-bright), var(--wine));
  box-shadow: 0 12px 30px -12px rgba(163,42,82,0.7);
}
.btn-wine:hover { transform: translateY(-2px); }

.btn-block { width: 100%; }

/* ---------- glass card ---------- */
.glass {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 22px;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--shadow);
}

/* ---------- layout ---------- */
.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 22px; }
.section { padding: clamp(72px, 12vw, 130px) 0; position: relative; }
.section-sm { padding: clamp(48px, 8vw, 80px) 0; }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.9s cubic-bezier(.2,.7,.2,1), transform 0.9s cubic-bezier(.2,.7,.2,1); }
.reveal.in { opacity: 1; transform: none; }
.reveal.d1 { transition-delay: 0.1s; }
.reveal.d2 { transition-delay: 0.22s; }
.reveal.d3 { transition-delay: 0.34s; }
.reveal.d4 { transition-delay: 0.46s; }

/* inputs */
.field { display: flex; flex-direction: column; gap: 7px; }
.field label {
  font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-dim); font-weight: 500;
}
.input, textarea.input, select.input {
  font-family: var(--font-ui);
  font-size: 16px; /* prevents iOS zoom */
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  border-radius: 14px;
  padding: 14px 16px;
  min-height: 52px;
  width: 100%;
  transition: border-color 0.25s, box-shadow 0.25s;
  outline: none;
}
textarea.input { min-height: 110px; resize: vertical; line-height: 1.5; }
.input::placeholder { color: var(--text-faint); }
.input:focus {
  border-color: var(--accent-hex);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* divider sparkle */
.rule { height: 1px; background: linear-gradient(90deg, transparent, var(--border-strong), transparent); border: none; margin: 0; }

/* utility */
.center { text-align: center; }
.stack { display: flex; flex-direction: column; }
.row { display: flex; align-items: center; }
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 0.74rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-dim);
  border: 1px solid var(--border); border-radius: 999px;
  padding: 7px 14px; background: var(--surface);
}

/* hide scrollbar nicety for horizontal scrollers */
.no-sb::-webkit-scrollbar { display: none; }
.no-sb { scrollbar-width: none; }

/* rastro de brilho do cursor */
.cursor-spark {
  position: fixed; z-index: 95; pointer-events: none; border-radius: 50%;
  background: radial-gradient(circle, #eef5ff, var(--accent-hex) 60%, transparent);
  box-shadow: 0 0 8px var(--accent-glow);
  transform: translate(-50%, -50%); will-change: transform, opacity;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.18s !important; }
  html { scroll-behavior: auto; }
}