/* ============================================================
   In Your Face — shared design system
   Every page uses these tokens + base components. No raw hex
   values in page stylesheets: extend from here.
   ============================================================ */

:root {
  /* --- Color: deep-space dark, violet→cyan accent --- */
  --bg: #07080c;
  --bg-elev: #0c0e15;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-strong: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.09);
  --border-strong: rgba(255, 255, 255, 0.16);

  --text: #f4f5f9;
  --text-muted: #9aa3b5;
  --text-faint: #626b7d;

  --violet: #8b5cf6;
  --cyan: #22d3ee;
  --magenta: #e879f9;
  --accent-grad: linear-gradient(135deg, #8b5cf6 0%, #6366f1 45%, #06b6d4 100%);
  --accent-grad-hover: linear-gradient(135deg, #9d71f8 0%, #7679f3 45%, #17c8e8 100%);

  --success: #34d399;
  --error: #fb7185;
  --warning: #fbbf24;
  --dev: #fbbf24;

  --glow-violet: 0 0 44px rgba(139, 92, 246, 0.35);
  --glow-cyan: 0 0 44px rgba(34, 211, 238, 0.25);
  --shadow-1: 0 2px 8px rgba(0, 0, 0, 0.35);
  --shadow-2: 0 12px 32px rgba(0, 0, 0, 0.45);
  --shadow-3: 0 24px 64px rgba(0, 0, 0, 0.55);

  /* --- Type --- */
  --font-display: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, sans-serif;
  --fs-xs: 0.75rem;
  --fs-sm: 0.85rem;
  --fs-base: 0.975rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.4rem;
  --fs-xl: clamp(1.75rem, 3.5vw, 2.4rem);
  --fs-hero: clamp(2.4rem, 5.5vw, 4rem);

  /* --- Shape & space --- */
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --r-pill: 999px;

  /* --- Motion --- */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 150ms;
  --t-med: 320ms;
  --t-slow: 650ms;

  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);

  color-scheme: dark;
}

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

[hidden] { display: none !important; }

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.55;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Ambient background glows — add class to body */
.ambient {
  background:
    radial-gradient(52rem 36rem at 12% -8%, rgba(139, 92, 246, 0.13), transparent 60%),
    radial-gradient(44rem 32rem at 105% 12%, rgba(34, 211, 238, 0.10), transparent 60%),
    radial-gradient(40rem 40rem at 50% 115%, rgba(232, 121, 249, 0.07), transparent 60%),
    var(--bg);
  background-attachment: fixed;
}

img, canvas, svg, video { display: block; max-width: 100%; }

button, input, select, textarea { font: inherit; color: inherit; }

a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

::selection { background: rgba(139, 92, 246, 0.45); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Slim styled scrollbars */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.12);
  border-radius: var(--r-pill);
  border: 2px solid var(--bg);
}
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.22); }

/* --- Typography helpers --- */
.display { font-family: var(--font-display); letter-spacing: -0.02em; }

.text-grad {
  background: var(--accent-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.muted { color: var(--text-muted); }
.faint { color: var(--text-faint); font-size: var(--fs-sm); }

/* --- Glass surface --- */
.glass {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.glass-strong {
  background: var(--surface-strong);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-lg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  border: none;
  border-radius: var(--r-md);
  padding: 0.8em 1.5em;
  font-weight: 600;
  font-size: var(--fs-base);
  font-family: var(--font-body);
  color: var(--text);
  background: var(--surface-strong);
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: transform var(--t-fast) var(--ease),
              box-shadow var(--t-med) var(--ease),
              background var(--t-fast) var(--ease),
              filter var(--t-fast) var(--ease);
}

.btn:hover { filter: brightness(1.12); }
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none; }

.btn-primary {
  background: var(--accent-grad);
  color: #fff;
  box-shadow: var(--shadow-1), var(--glow-violet);
  position: relative;
  overflow: hidden;
}
.btn-primary:hover { background: var(--accent-grad-hover); box-shadow: var(--shadow-2), var(--glow-violet); }

/* moving sheen on primary buttons */
.btn-primary::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 30%, rgba(255, 255, 255, 0.25) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform var(--t-slow) var(--ease);
}
.btn-primary:hover::after { transform: translateX(120%); }

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border-strong);
}
.btn-ghost:hover { background: var(--surface); }

.btn-dev {
  background: transparent;
  border: 1.5px dashed rgba(251, 191, 36, 0.55);
  color: var(--dev);
  font-size: var(--fs-sm);
}
.btn-dev:hover { background: rgba(251, 191, 36, 0.08); }

.btn-lg { padding: 1em 2em; font-size: var(--fs-md); border-radius: var(--r-lg); }
.btn-sm { padding: 0.5em 1em; font-size: var(--fs-sm); border-radius: var(--r-sm); }

/* Icon-only button */
.btn-icon {
  padding: 0.6em;
  border-radius: var(--r-md);
  background: transparent;
  border: 1px solid transparent;
}
.btn-icon:hover { background: var(--surface-strong); }

/* --- Form fields (floating label) --- */
.field { position: relative; text-align: left; }

.field input {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 1.35em 1em 0.5em;
  font-size: var(--fs-base);
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}

.field input:hover { border-color: var(--border-strong); }

.field input:focus {
  outline: none;
  border-color: var(--violet);
  background: var(--surface-strong);
}

.field label {
  position: absolute;
  left: 1em;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-faint);
  pointer-events: none;
  transition: all var(--t-fast) var(--ease);
}

.field input:focus + label,
.field input:not(:placeholder-shown) + label {
  top: 0.85em;
  transform: none;
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.field.invalid input { border-color: var(--error); }

.field-error {
  color: var(--error);
  font-size: var(--fs-xs);
  margin-top: 0.35em;
  min-height: 1.2em;
}

/* --- Chips / avatar --- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.35em 0.9em;
  border-radius: var(--r-pill);
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

.avatar {
  width: 34px;
  height: 34px;
  border-radius: var(--r-pill);
  background: var(--accent-grad);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--fs-sm);
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

/* --- Logo --- */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-md);
  letter-spacing: -0.01em;
  color: var(--text);
}

.logo-mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: var(--accent-grad);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
  box-shadow: var(--glow-violet);
}

/* split-face motif: darker right half + center seam */
.logo-mark::before {
  content: "";
  position: absolute;
  inset: 0 0 0 50%;
  background: rgba(7, 8, 12, 0.42);
}
.logo-mark::after {
  content: "";
  position: absolute;
  top: 4px;
  bottom: 4px;
  left: calc(50% - 1px);
  width: 2px;
  background: rgba(255, 255, 255, 0.85);
  border-radius: var(--r-pill);
}

/* --- Status dot --- */
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; flex-shrink: 0; }
.dot-on { background: var(--success); box-shadow: 0 0 8px rgba(52, 211, 153, 0.8); }
.dot-off { background: var(--text-faint); }

/* --- Entrance animations --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.fade-up { animation: fadeUp var(--t-slow) var(--ease) both; }
.fade-in { animation: fadeIn var(--t-med) var(--ease) both; }

/* Stagger helpers: apply .fade-up + .d1…d8 */
.d1 { animation-delay: 60ms; } .d2 { animation-delay: 120ms; }
.d3 { animation-delay: 180ms; } .d4 { animation-delay: 240ms; }
.d5 { animation-delay: 300ms; } .d6 { animation-delay: 360ms; }
.d7 { animation-delay: 420ms; } .d8 { animation-delay: 480ms; }

/* --- Loading shimmer --- */
@keyframes shimmer {
  from { background-position: -200% 0; }
  to { background-position: 200% 0; }
}

.shimmer {
  background: linear-gradient(100deg,
    rgba(255, 255, 255, 0.03) 40%,
    rgba(255, 255, 255, 0.09) 50%,
    rgba(255, 255, 255, 0.03) 60%);
  background-size: 200% 100%;
  animation: shimmer 1.6s linear infinite;
  border-radius: var(--r-lg);
}

/* Blinking caret for streaming text */
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }

.caret::after {
  content: "▍";
  color: var(--cyan);
  animation: blink 0.9s step-start infinite;
  margin-left: 1px;
}

/* Spinner */
@keyframes spin { to { transform: rotate(360deg); } }

.spinner {
  width: 20px;
  height: 20px;
  border: 2.5px solid var(--border-strong);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* Shake for invalid form submit */
@keyframes shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-4px); }
  40%, 60% { transform: translateX(4px); }
}
.shake { animation: shake 500ms var(--ease); }

/* --- Toast --- */
.toast {
  position: fixed;
  bottom: calc(24px + var(--safe-bottom));
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-elev);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  padding: 0.7em 1.3em;
  font-size: var(--fs-sm);
  box-shadow: var(--shadow-2);
  z-index: 400;
  animation: fadeUp var(--t-med) var(--ease) both;
}
.toast.error { border-color: rgba(251, 113, 133, 0.5); color: var(--error); }
.toast.success { border-color: rgba(52, 211, 153, 0.5); color: var(--success); }

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}