/* ============================================
   VoiceBoard — Apple HIG Design System
   Premium Dark/Light Theme with Glassmorphism
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

:root {
    /* ── Primary Colors ── */
    --color-primary: #007AFF;
    --color-primary-hover: #0062CC;
    --color-primary-light: rgba(0, 122, 255, 0.12);
    --color-secondary: #5AC8FA;
    --color-success: #30D158;
    --color-success-light: rgba(48, 209, 88, 0.12);
    --color-danger: #FF453A;
    --color-danger-light: rgba(255, 69, 58, 0.12);
    --color-warning: #FF9F0A;
    --color-warning-light: rgba(255, 159, 10, 0.12);
    --color-info: #64D2FF;
    --color-purple: #BF5AF2;
    --color-pink: #FF375F;
    --color-teal: #6AC4DC;
    --color-indigo: #5856D6;

    /* ── Semantic Colors — Light Mode ── */
    --color-background: #F2F2F7;
    --color-surface: #FFFFFF;
    --color-surface-elevated: #FFFFFF;
    --color-secondary-bg: #F5F5F7;
    --color-tertiary-bg: #EFEFF4;
    --color-text-primary: #1D1D1F;
    --color-text-secondary: #86868B;
    --color-text-tertiary: #AEAEB2;
    --color-border: rgba(0, 0, 0, 0.08);
    --color-border-strong: rgba(0, 0, 0, 0.15);
    --color-separator: rgba(60, 60, 67, 0.12);

    /* ── Sidebar ── */
    --sidebar-bg: #FBFBFD;
    --sidebar-width: 230px;
    --sidebar-collapsed-width: 72px;

    /* ── Spacing (8pt grid) ── */
    --spacing-2xs: 2px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;

    /* ── Typography ── */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-2xs: 10px;
    --font-size-xs: 11px;
    --font-size-sm: 13px;
    --font-size-base: 15px;
    --font-size-lg: 17px;
    --font-size-xl: 22px;
    --font-size-2xl: 28px;
    --font-size-3xl: 34px;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-heavy: 800;

    /* ── Shadows ── */
    --shadow-xs: 0 0.5px 1px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.04), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.06), 0 4px 10px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.08), 0 8px 16px rgba(0, 0, 0, 0.06);
    --shadow-glow: 0 0 20px rgba(0, 122, 255, 0.15);

    /* ── Border Radius ── */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-2xl: 28px;
    --radius-full: 999px;

    /* ── Transitions ── */
    --transition-fast: 0.15s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-base: 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-slow: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);

    /* ── Glass ── */
    --glass-bg: rgba(255, 255, 255, 0.72);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-blur: 20px;
}

/* ── Dark Mode ── */
[data-theme="dark"] {
    --color-background: #000000;
    --color-surface: #1C1C1E;
    --color-surface-elevated: #2C2C2E;
    --color-secondary-bg: #1C1C1E;
    --color-tertiary-bg: #2C2C2E;
    --color-text-primary: #F5F5F7;
    --color-text-secondary: #98989D;
    --color-text-tertiary: #636366;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-strong: rgba(255, 255, 255, 0.15);
    --color-separator: rgba(84, 84, 88, 0.36);

    --sidebar-bg: #0D0D0D;

    --shadow-xs: 0 0.5px 1px rgba(0, 0, 0, 0.2);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.2), 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.3), 0 4px 10px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.4), 0 8px 16px rgba(0, 0, 0, 0.3);

    --glass-bg: rgba(28, 28, 30, 0.72);
    --glass-border: rgba(255, 255, 255, 0.08);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    line-height: 1.5;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-hover);
}

/* ── Scrollbar ── */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--color-text-tertiary);
    border-radius: var(--radius-full);
}

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

/* ── Selection ── */
::selection {
    background: var(--color-primary);
    color: white;
}