/* ═══════════════════════════════════════════════════════════════════════════
   app.css — ResumeAI Design System (v4 rebuild)
   Single source of truth: tokens, base styles, shared components.
   Loaded on every page BEFORE the page-specific stylesheet.
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Design Tokens ────────────────────────────────────────────────────────── */
:root,
[data-theme="dark"] {
  /* Brand */
  --brand-1: #7c5cfc;
  --brand-2: #a78bfa;
  --brand-3: #38bdf8;
  --brand-grad: linear-gradient(135deg, #7c5cfc 0%, #a056f7 55%, #c084fc 100%);
  --accent: #7c5cfc;            /* legacy alias used by JS inline styles */
  --accent-light: #a78bfa;
  --orange: #f59e0b;            /* legacy alias */

  /* Surfaces */
  --bg: #08080d;
  --bg-soft: #0d0d15;
  --surface: #11111a;
  --surface-2: #171724;
  --surface-3: #1e1e2e;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);

  /* Text */
  --text: #f2f2f7;
  --text-soft: #b9b9c9;
  --text-muted: #7e7e92;

  /* Semantic */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;

  /* ATS panel hooks (used by renderer.js) */
  --ats-track: rgba(255, 255, 255, 0.09);
  --ats-label: #7e7e92;

  /* Effects */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 8px 24px -8px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 24px 64px -16px rgba(0, 0, 0, 0.6);
  --glow: 0 0 0 1px rgba(124, 92, 252, 0.35), 0 8px 40px -8px rgba(124, 92, 252, 0.45);
  --ring: 0 0 0 3px rgba(124, 92, 252, 0.30);

  /* Shape & type */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;

  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #f7f7fb;
  --bg-soft: #f0f0f6;
  --surface: #ffffff;
  --surface-2: #f6f6fa;
  --surface-3: #ededf4;
  --border: rgba(15, 15, 35, 0.09);
  --border-strong: rgba(15, 15, 35, 0.16);

  --text: #15151e;
  --text-soft: #4b4b5e;
  --text-muted: #82828f;

  --ats-track: rgba(15, 15, 35, 0.08);
  --ats-label: #82828f;

  --shadow-sm: 0 1px 2px rgba(20, 20, 43, 0.06);
  --shadow-md: 0 8px 24px -8px rgba(20, 20, 43, 0.12);
  --shadow-lg: 0 24px 64px -16px rgba(20, 20, 43, 0.18);
  --glow: 0 0 0 1px rgba(124, 92, 252, 0.25), 0 8px 32px -8px rgba(124, 92, 252, 0.35);

  color-scheme: light;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  min-height: 100vh;
  transition: background 0.3s ease, color 0.3s ease;
}

h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.15; letter-spacing: -0.02em; }

a { color: var(--accent-light); text-decoration: none; }
a:hover { text-decoration: none; }

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

button { font-family: inherit; cursor: pointer; }

::selection { background: rgba(124, 92, 252, 0.35); color: var(--text); }

:focus-visible { outline: none; box-shadow: var(--ring); border-radius: var(--radius-sm); }

/* Scrollbar */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 99px; border: 2px solid var(--bg); }
::-webkit-scrollbar-thumb:hover { background: var(--border-strong); }

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

/* ── Logo ─────────────────────────────────────────────────────────────────── */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
}
.logo span { background: var(--brand-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.logo-mark {
  width: 30px; height: 30px;
  border-radius: 9px;
  background: var(--brand-grad);
  display: inline-flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 14px -2px rgba(124, 92, 252, 0.5);
  flex-shrink: 0;
}
.logo-mark svg { width: 17px; height: 17px; }

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.72rem 1.4rem;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease, opacity 0.2s;
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.btn-primary {
  background: var(--brand-grad);
  color: #fff;
  box-shadow: 0 4px 18px -4px rgba(124, 92, 252, 0.55);
}
.btn-primary:hover { box-shadow: var(--glow); transform: translateY(-1px); }

.btn-outline {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-outline:hover { border-color: var(--accent); background: var(--surface-2); }

.btn-ghost { background: transparent; color: var(--text-soft); }
.btn-ghost:hover { color: var(--text); background: var(--surface-2); }

.btn-danger { background: linear-gradient(135deg, #ef4444, #dc2626); color: #fff; }
.btn-danger:hover { box-shadow: 0 6px 24px -6px rgba(239, 68, 68, 0.6); }

.btn-lg { padding: 0.95rem 1.9rem; font-size: 1rem; border-radius: 14px; }
.btn-sm { padding: 0.45rem 0.9rem; font-size: 0.82rem; border-radius: var(--radius-sm); }

/* ── Form Controls ────────────────────────────────────────────────────────── */
input[type="text"], input[type="email"], input[type="password"],
input[type="tel"], textarea, select {
  width: 100%;
  font-family: inherit;
  font-size: 0.92rem;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.72rem 0.95rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
input::placeholder, textarea::placeholder { color: var(--text-muted); }
input:hover, textarea:hover, select:hover { border-color: var(--border-strong); }
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--ring);
  background: var(--surface);
}
input.error, textarea.error { border-color: var(--error); box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.18); }
textarea { resize: vertical; line-height: 1.55; }

label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-soft);
  margin-bottom: 0.4rem;
  letter-spacing: 0.01em;
}

/* ── Theme Toggle ─────────────────────────────────────────────────────────── */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-soft);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.42rem 0.75rem;
  border-radius: 99px;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.theme-toggle:hover { border-color: var(--border-strong); color: var(--text); }
.theme-toggle .t-icon { font-size: 0.85rem; line-height: 1; }
[data-theme="dark"] .t-label-light { display: none; }
[data-theme="light"] .t-label-dark { display: none; }
[data-theme="light"] .theme-toggle .t-icon::before { content: ""; }

/* ── Toast ────────────────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translate(-50%, 150%);
  background: var(--surface-3);
  color: var(--text);
  border: 1px solid var(--error);
  border-left: 4px solid var(--error);
  padding: 0.85rem 1.3rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 9999;
  max-width: min(92vw, 480px);
  opacity: 0;
  transition: transform 0.35s cubic-bezier(0.21, 1.02, 0.73, 1), opacity 0.35s ease;
  pointer-events: none;
}
.toast.show { transform: translate(-50%, 0); opacity: 1; }
.toast.success { border-color: var(--success); border-left-color: var(--success); }

/* ── Spinner ──────────────────────────────────────────────────────────────── */
.spinner {
  width: 17px; height: 17px;
  border: 2.5px solid rgba(255, 255, 255, 0.25);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: none;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Skeleton shimmer ─────────────────────────────────────────────────────── */
.skeleton {
  background: linear-gradient(90deg, var(--surface-2) 25%, var(--surface-3) 50%, var(--surface-2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: 6px;
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ── Badges ───────────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.28rem 0.7rem;
  border-radius: 99px;
  background: rgba(124, 92, 252, 0.12);
  color: var(--accent-light);
  border: 1px solid rgba(124, 92, 252, 0.25);
}

/* ── Reveal-on-scroll helper ──────────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.21, 0.8, 0.4, 1); }
.reveal.in { opacity: 1; transform: none; }

/* ── Shared app navbar (builder / dashboard) ──────────────────────────────── */
.app-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.7rem clamp(1rem, 4vw, 2rem);
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.app-nav-side { display: flex; align-items: center; gap: 0.9rem; min-width: 0; }