/* ============================================
   NexUtils Dark Mode System — theme.css
   Complete light/dark theme with CSS variables
   ============================================ */

/* ── Light Mode (Default) ── */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-input: #ffffff;
  --bg-code: #f1f5f9;
  --bg-hover: #f8fafc;
  --bg-overlay: rgba(0, 0, 0, 0.5);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;

  --border-primary: #e2e8f0;
  --border-secondary: #f1f5f9;
  --border-focus: #4F46E5;

  --accent: #4F46E5;
  --accent-hover: #4338CA;
  --accent-light: #EEF2FF;
  --accent-text: #ffffff;

  --success: #10B981;
  --success-light: #D1FAE5;
  --warning: #F59E0B;
  --warning-light: #FEF3C7;
  --error: #EF4444;
  --error-light: #FEE2E2;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

  --header-bg: rgba(255, 255, 255, 0.95);
  --footer-bg: #0f172a;
  --footer-text: #94a3b8;

  --tool-card-bg: #ffffff;
  --tool-card-border: #e2e8f0;
  --tool-card-hover-border: #818CF8;
  --tool-card-hover-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.1);

  --input-bg: #ffffff;
  --input-border: #e2e8f0;
  --input-focus-border: #4F46E5;
  --input-focus-shadow: 0 0 0 4px rgba(79, 70, 229, 0.1);
  --input-placeholder: #94a3b8;

  --btn-primary-bg: #4F46E5;
  --btn-primary-hover: #4338CA;
  --btn-primary-text: #ffffff;
  --btn-secondary-bg: #f1f5f9;
  --btn-secondary-hover: #e2e8f0;
  --btn-secondary-text: #0f172a;

  --highlight-bg: #FEF08A;
  --highlight-text: #0f172a;

  --code-bg: #f1f5f9;
  --code-text: #e11d48;

  --scrollbar-track: #f1f5f9;
  --scrollbar-thumb: #cbd5e1;
  --scrollbar-thumb-hover: #94a3b8;

  --transition-speed: 0.2s;
  --transition-fn: ease;
}

/* ── Dark Mode ── */
[data-theme="dark"] {
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-tertiary: #334155;
  --bg-card: #1e293b;
  --bg-input: #1e293b;
  --bg-code: #1e293b;
  --bg-hover: #334155;
  --bg-overlay: rgba(0, 0, 0, 0.7);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  --border-primary: #334155;
  --border-secondary: #1e293b;
  --border-focus: #818CF8;

  --accent: #818CF8;
  --accent-hover: #6366F1;
  --accent-light: #1e1b4b;
  --accent-text: #ffffff;

  --success: #34D399;
  --success-light: #064E3B;
  --warning: #FBBF24;
  --warning-light: #78350F;
  --error: #F87171;
  --error-light: #7F1D1D;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);

  --header-bg: rgba(15, 23, 42, 0.95);
  --footer-bg: #020617;
  --footer-text: #64748b;

  --tool-card-bg: #1e293b;
  --tool-card-border: #334155;
  --tool-card-hover-border: #818CF8;
  --tool-card-hover-shadow: 0 10px 15px -3px rgba(129, 140, 248, 0.15);

  --input-bg: #1e293b;
  --input-border: #334155;
  --input-focus-border: #818CF8;
  --input-focus-shadow: 0 0 0 4px rgba(129, 140, 248, 0.15);
  --input-placeholder: #64748b;

  --btn-primary-bg: #818CF8;
  --btn-primary-hover: #6366F1;
  --btn-primary-text: #ffffff;
  --btn-secondary-bg: #334155;
  --btn-secondary-hover: #475569;
  --btn-secondary-text: #f1f5f9;

  --highlight-bg: #854D0E;
  --highlight-text: #fbbf24;

  --code-bg: #1e293b;
  --code-text: #f472b6;

  --scrollbar-track: #1e293b;
  --scrollbar-thumb: #475569;
  --scrollbar-thumb-hover: #64748b;
}

/* ── Global Theme Transitions ── */
body,
body *:not(script):not(style):not(link) {
  transition:
    background-color var(--transition-speed) var(--transition-fn),
    color var(--transition-speed) var(--transition-fn),
    border-color var(--transition-speed) var(--transition-fn),
    box-shadow var(--transition-speed) var(--transition-fn);
}

/* ── Theme Toggle Button ── */
.theme-toggle {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--border-primary);
  background: var(--bg-card);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  overflow: hidden;
  flex-shrink: 0;
}

.theme-toggle:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}

.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
  position: absolute;
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  color: var(--text-primary);
}

.theme-toggle .icon-sun {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

.theme-toggle .icon-moon {
  opacity: 0;
  transform: rotate(-90deg) scale(0.5);
}

[data-theme="dark"] .theme-toggle .icon-sun {
  opacity: 0;
  transform: rotate(90deg) scale(0.5);
}

[data-theme="dark"] .theme-toggle .icon-moon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}

/* ── Scrollbar Theming ── */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

/* ── Selection Color ── */
::selection {
  background: var(--accent);
  color: var(--accent-text);
}