/* ============================================
   Resource Share Site - Brand Design Tokens
   Style: Dark Tech / 暗色科技风
   ============================================ */

:root {
  /* ---- Color System ---- */
  --color-bg-primary: #0f1117;
  --color-bg-secondary: #1a1d27;
  --color-bg-tertiary: #232733;
  --color-bg-elevated: #2a2f3e;
  --color-bg-surface: #1e2130;
  --color-bg-card: #1e2130;
  --color-bg-card-hover: #262b3d;
  --color-bg-input: #232733;
  --color-bg-overlay: rgba(0, 0, 0, 0.7);

  --color-text-primary: #e8eaed;
  --color-text-secondary: #9aa0b0;
  --color-text-tertiary: #6b7280;
  --color-text-inverse: #0f1117;
  --color-text-link: #f97316;

  --color-brand-primary: #f97316;
  --color-brand-primary-hover: #fb923c;
  --color-brand-primary-muted: rgba(249, 115, 22, 0.15);
  --color-brand-primary-subtle: rgba(249, 115, 22, 0.08);

  --color-border-primary: #2d3348;
  --color-border-secondary: #3d4460;
  --color-border-focus: #f97316;

  --state-success: #22c55e;
  --state-warning: #f59e0b;
  --state-error: #ef4444;
  --state-info: #3b82f6;

  /* ---- Typography ---- */
  --font-display: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;

  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* ---- Spacing ---- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* ---- Radius ---- */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* ---- Shadows ---- */
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.04);
  --shadow-elevated: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-modal: 0 16px 48px rgba(0, 0, 0, 0.3);

  /* ---- Transitions ---- */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;
}

@theme inline {
  --color-primary: var(--color-brand-primary);
  --color-primary-hover: var(--color-brand-primary-hover);
  --color-primary-muted: var(--color-brand-primary-muted);
  --color-primary-subtle: var(--color-brand-primary-subtle);
  --color-background: var(--color-bg-primary);
  --color-surface: var(--color-bg-surface);
  --color-card: var(--color-bg-card);
  --color-card-hover: var(--color-bg-card-hover);
  --color-input: var(--color-bg-input);
  --color-elevated: var(--color-bg-elevated);
  --color-secondary-bg: var(--color-bg-secondary);
  --color-tertiary-bg: var(--color-bg-tertiary);
  --color-overlay: var(--color-bg-overlay);
  --color-foreground: var(--color-text-primary);
  --color-muted: var(--color-text-secondary);
  --color-muted-foreground: var(--color-text-tertiary);
  --color-inverse: var(--color-text-inverse);
  --color-link: var(--color-text-link);
  --color-border: var(--color-border-primary);
  --color-border-secondary: var(--color-border-secondary);
  --color-border-focus: var(--color-border-focus);
  --color-success: var(--state-success);
  --color-warning: var(--state-warning);
  --color-error: var(--state-error);
  --color-info: var(--state-info);
  --font-display: var(--font-display);
  --font-body: var(--font-body);
  --font-mono: var(--font-mono);
  --radius-sm: var(--radius-sm);
  --radius-md: var(--radius-md);
  --radius-lg: var(--radius-lg);
  --radius-full: var(--radius-full);
}

/* ---- Scrollbar utility ---- */
.no-scrollbar::-webkit-scrollbar { display: none; }
.no-scrollbar { -ms-overflow-style: none; scrollbar-width: none; }

/* ---- Icon mask utility ---- */
[data-icon] {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  -webkit-mask-size: contain;
  mask-size: contain;
  -webkit-mask-repeat: no-repeat;
  mask-repeat: no-repeat;
  -webkit-mask-position: center;
  mask-position: center;
  background-color: currentColor;
}

/* ---- Base Reset (dark-first) ---- */
body {
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-body);
  line-height: var(--leading-normal);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---- Nav active indicator ---- */
.nav-link {
  position: relative;
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  font-size: var(--text-sm);
  padding: var(--space-2) 0;
}
.nav-link:hover,
.nav-link.active {
  color: var(--color-text-primary);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-brand-primary);
  border-radius: var(--radius-full);
}

/* ---- Search icon button ---- */
.search-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: color var(--transition-fast), background-color var(--transition-fast);
  background: transparent;
  border: none;
  cursor: pointer;
}
.search-btn:hover {
  color: var(--color-text-primary);
  background-color: var(--color-bg-tertiary);
}

/* ---- Mobile hamburger ---- */
.hamburger-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-text-secondary);
  border-radius: var(--radius-full);
  transition: background-color var(--transition-fast);
}

/* ---- Footer links ---- */
.footer-link {
  color: var(--color-text-tertiary);
  text-decoration: none;
  font-size: var(--text-sm);
  transition: color var(--transition-fast);
}
.footer-link:hover {
  color: var(--color-text-secondary);
}

/* ---- Slot placeholders (visual debug, remove in production) ---- */
[data-slot] {
  outline: 1px dashed rgba(249, 115, 22, 0.25);
}

/* ---- Login button ---- */
.login-btn {
  background-color: var(--color-brand-primary);
  color: var(--color-text-inverse);
}
.login-btn:hover {
  background-color: var(--color-brand-primary-hover);
}

/* ---- Edit profile button ---- */
.edit-profile-btn {
  border: 1px solid var(--color-border-secondary);
  color: var(--color-text-secondary);
  text-decoration: none;
}
.edit-profile-btn:hover {
  border-color: var(--color-brand-primary);
  color: var(--color-brand-primary);
}