/*
 * ToMN — Shared design tokens.
 * One system for index, measure editor, and settings: Apple-grade polish.
 * Uses color-scheme so native controls (scrollbars, inputs, selects) follow theme.
 */

/* ═══════════════════════════ LIGHT THEME ═══════════════════════════ */
:root {
    color-scheme: light;

    /* ── Palette — light, calm, professional ── */
    --bg-primary:           #f5f5f7;
    --bg-secondary:         #ffffff;
    --bg-tertiary:          #fafafa;
    --bg-elevated:          #ffffff;
    --bg-glass:             rgba(255, 255, 255, 0.72);
    --bg-glass-thick:       rgba(255, 255, 255, 0.85);
    --bg-overlay:           rgba(0, 0, 0, 0.4);

    --border-color:         #e5e5e7;
    --border-color-strong:  #d1d1d6;
    --border-color-subtle:  #efefef;
    --border-glass:         rgba(255, 255, 255, 0.18);

    --text-primary:         #1d1d1f;
    --text-secondary:       #86868b;
    --text-muted:           #a1a1a6;
    --text-tertiary:        #a1a1a6;
    --text-inverse:         #ffffff;

    --accent:               #0071e3;
    --accent-primary:       #0071e3;
    --accent-cyan:          #06b6d4;
    --accent-hover:         #0077ed;
    --accent-active:        #0060c0;
    --accent-subtle:        rgba(0, 113, 227, 0.10);
    --accent-subtle-hover:  rgba(0, 113, 227, 0.15);
    --accent-glow:          rgba(0, 113, 227, 0.35);

    /* Shadows — layered for depth */
    --shadow-xs:            0 1px 2px 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:               rgba(0, 0, 0, 0.06);
    --shadow-md:            0 4px 16px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-strong:        rgba(0, 0, 0, 0.10);
    --shadow-lg:            0 8px 32px rgba(0, 0, 0, 0.12), 0 4px 8px rgba(0, 0, 0, 0.06);
    --shadow-xl:            0 16px 48px rgba(0, 0, 0, 0.16), 0 8px 16px rgba(0, 0, 0, 0.08);
    --shadow-elevated:      0 8px 30px rgba(0, 0, 0, 0.10), 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-2xl:           0 24px 64px rgba(0, 0, 0, 0.18), 0 12px 24px rgba(0, 0, 0, 0.10);
    --shadow-accent:        0 4px 16px var(--accent-glow);
    --shadow-success:       0 4px 16px rgba(52, 199, 89, 0.3);
    --shadow-glass:         0 8px 32px rgba(0, 0, 0, 0.08), inset 0 0 0 1px rgba(255, 255, 255, 0.1);

    /* ── Semantic ── */
    --success:              #34c759;
    --success-muted:        rgba(52, 199, 89, 0.12);
    --success-glow:         rgba(48, 209, 88, 0.4);
    --danger:               #ef4444;
    --danger-muted:         rgba(239, 68, 68, 0.12);
    --danger-glow:          rgba(255, 69, 58, 0.4);
    --warning:              #f5a623;
    --warning-muted:        rgba(245, 166, 35, 0.12);
    --warning-glow:         rgba(255, 159, 10, 0.4);
    --info:                 #0071e3;
    --info-muted:           rgba(0, 113, 227, 0.10);
    --purple:               #7c3aed;
    --purple-muted:         rgba(124, 58, 237, 0.12);
    /* Rest measure badge — visible in-measure only; muted orange, white text */
    --rest-badge-bg:        #d97706;
    --rest-badge-text:      #ffffff;
    --rest-badge-border:    #b45309;

    /* ── Surfaces — glass morphism ── */
    --glass-bg:             rgba(255, 255, 255, 0.72);
    --glass-border:         rgba(255, 255, 255, 0.35);
    --glass-blur:           20px;

    /* ── Spacing — 4px base ── */
    --space-0: 0px;
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-7: 28px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;

    /* ── Radius — Apple-consistent ── */
    --radius-xs:    3px;
    --radius-sm:    4px;
    --radius:       6px;
    --radius-md:    8px;
    --radius-lg:    12px;
    --radius-xl:    16px;
    --radius-2xl:   28px;
    --radius-full:  9999px;

    /* ── Type — system fonts ── */
    --font: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Menlo', 'Consolas', monospace;
    --text-xs:   11px;
    --text-sm:   13px;
    --text-base: 14px;
    --text-md:   16px;
    --text-lg:   18px;
    --text-xl:   20px;
    --text-2xl:  28px;
    --text-3xl:  34px;

    --leading-tight:   1.2;
    --leading-normal:  1.5;
    --leading-relaxed: 1.65;

    --tracking-tight:  -0.02em;
    --tracking-normal: 0;
    --tracking-wide:   0.02em;

    /* ═══════════════ Motion — Apple-style spring & ease ═══════════════ */

    /* Easing curves */
    --ease:            cubic-bezier(0.25, 0.1, 0.25, 1);
    --ease-spring:     cubic-bezier(0.22, 1.0, 0.36, 1);
    --ease-out:        cubic-bezier(0.16, 1, 0.3, 1);
    --ease-smooth:     cubic-bezier(0.45, 0, 0.55, 1);
    --ease-in:         cubic-bezier(0.55, 0, 1, 0.45);
    --ease-in-out:     cubic-bezier(0.4, 0, 0.2, 1);
    --ease-bounce:     cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-apple:      cubic-bezier(0.4, 0, 0, 1);
    --ease-apple-bounce: cubic-bezier(0.175, 0.885, 0.32, 1.275);
    --ease-linear:     linear;

    /* Duration scale */
    --dur-instant:  0.1s;
    --dur-fast:     0.18s;
    --dur:          0.25s;
    --dur-normal:   0.25s;
    --dur-medium:   0.35s;
    --dur-slow:     0.5s;
    --dur-slower:   0.7s;
    --dur-slowest:  0.7s;

    /* Stagger delay for cascading entrance */
    --stagger: 40ms;

    /* ── Blur — Glass morphism ── */
    --blur-sm: 8px;
    --blur:    12px;
    --blur-md: 20px;
    --blur-lg: 40px;
    --blur-xl: 64px;

    /* ── Z-index layering ── */
    --z-base:           0;
    --z-dropdown:       100;
    --z-sticky:         200;
    --z-fixed:          300;
    --z-modal-backdrop: 400;
    --z-modal:          500;
    --z-popover:        600;
    --z-tooltip:        700;
    --z-toast:          800;
    --z-max:            9999;

    /* Touch target */
    --touch:    44px;
    --touch-sm: 36px;
    --touch-lg: 52px;

    /* Focus ring */
    --focus-ring:        0 0 0 3px var(--accent-glow);
    --focus-ring-offset: 0 0 0 2px var(--bg-secondary), 0 0 0 4px var(--accent);

    /* ── Scrollbar ── */
    --scrollbar-thumb:       var(--border-color);
    --scrollbar-thumb-hover: var(--border-color-strong);
    --scrollbar-track:       transparent;
}

/* ═══════════════════════════ DARK THEME ═══════════════════════════ */
body.dark-mode {
    color-scheme: dark;

    --bg-primary:           #1a1a1c;
    --bg-secondary:         #2c2c2e;
    --bg-tertiary:          #38383a;
    --bg-elevated:          #3a3a3c;
    --bg-glass:             rgba(44, 44, 46, 0.72);
    --bg-glass-thick:       rgba(44, 44, 46, 0.88);
    --bg-overlay:           rgba(0, 0, 0, 0.6);

    --border-color:         #3d3d40;
    --border-color-strong:  #545458;
    --border-color-subtle:  #2c2c2e;
    --border-glass:         rgba(255, 255, 255, 0.08);

    --text-primary:         #f5f5f7;
    --text-secondary:       #a1a1a6;
    --text-muted:           #6e6e73;
    --text-tertiary:        #6e6e73;

    --accent:               #2997ff;
    --accent-primary:       #2997ff;
    --accent-cyan:          #22d3ee;
    --accent-hover:         #40a9ff;
    --accent-active:        #0a84ff;
    --accent-subtle:        rgba(41, 151, 255, 0.14);
    --accent-subtle-hover:  rgba(41, 151, 255, 0.22);
    --accent-glow:          rgba(41, 151, 255, 0.35);

    --shadow-xs:            0 1px 2px 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:               rgba(0, 0, 0, 0.28);
    --shadow-md:            0 4px 16px rgba(0, 0, 0, 0.5), 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-strong:        rgba(0, 0, 0, 0.42);
    --shadow-lg:            0 8px 32px rgba(0, 0, 0, 0.6), 0 4px 8px rgba(0, 0, 0, 0.3);
    --shadow-xl:            0 16px 48px rgba(0, 0, 0, 0.7), 0 8px 16px rgba(0, 0, 0, 0.4);
    --shadow-elevated:      0 8px 40px rgba(0, 0, 0, 0.45), 0 2px 10px rgba(0, 0, 0, 0.30);
    --shadow-2xl:           0 24px 64px rgba(0, 0, 0, 0.6), 0 12px 24px rgba(0, 0, 0, 0.4);
    --shadow-success:       0 4px 16px rgba(48, 209, 88, 0.35);

    /* Semantic */
    --success:              #30d158;
    --success-muted:        rgba(48, 209, 88, 0.18);
    --danger:               #ff453a;
    --danger-muted:         rgba(255, 69, 58, 0.18);
    --warning:              #ffd60a;
    --warning-muted:        rgba(255, 214, 10, 0.18);
    --info:                 #2997ff;
    --info-muted:           rgba(41, 151, 255, 0.16);
    --purple:               #a78bfa;
    --purple-muted:         rgba(167, 139, 250, 0.18);
    --rest-badge-bg:        #ea580c;
    --rest-badge-text:      #ffffff;
    --rest-badge-border:    #c2410c;

    /* Glass */
    --glass-bg:             rgba(44, 44, 46, 0.72);
    --glass-border:         rgba(255, 255, 255, 0.08);
    --glass-blur:           24px;

    /* Scrollbar */
    --scrollbar-thumb:       rgba(255, 255, 255, 0.16);
    --scrollbar-thumb-hover: rgba(255, 255, 255, 0.28);
    --scrollbar-track:       transparent;
}

/* ═══════════════════ Base surface fallbacks ═══════════════════ */
body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}
.app-container {
    background-color: var(--bg-primary);
}

/* ═══════════════════ Reduced-motion: respect user preference ═══════════════════ */
@media (prefers-reduced-motion: reduce) {
    :root {
        --dur-instant: 0.01s;
        --dur-fast: 0.01s;
        --dur: 0.01s;
        --dur-normal: 0.01s;
        --dur-medium: 0.01s;
        --dur-slow: 0.01s;
        --dur-slower: 0.01s;
        --dur-slowest: 0.01s;
    }

    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ═══════════════════ Utility classes ═══════════════════ */

/* Fade animations */
.fade-in  { animation: fadeIn var(--dur-normal) var(--ease-out) forwards; }
.fade-out { animation: fadeOut var(--dur-fast) var(--ease-in) forwards; }

/* Slide animations */
.slide-up    { animation: slideUp var(--dur-normal) var(--ease-apple) forwards; }
.slide-down  { animation: slideDown var(--dur-normal) var(--ease-apple) forwards; }
.slide-left  { animation: slideLeft var(--dur-normal) var(--ease-apple) forwards; }
.slide-right { animation: slideRight var(--dur-normal) var(--ease-apple) forwards; }

/* Scale animations */
.scale-in  { animation: scaleIn var(--dur-normal) var(--ease-spring) forwards; }
.scale-out { animation: scaleOut var(--dur-fast) var(--ease-in) forwards; }

/* Glass morphism */
.glass {
    background: var(--bg-glass);
    backdrop-filter: blur(var(--blur-md));
    -webkit-backdrop-filter: blur(var(--blur-md));
    border: 1px solid var(--border-glass);
}
.glass-thick {
    background: var(--bg-glass-thick);
    backdrop-filter: blur(var(--blur-lg));
    -webkit-backdrop-filter: blur(var(--blur-lg));
    border: 1px solid var(--border-glass);
}

/* Interactive states */
.interactive {
    transition: transform var(--dur-fast) var(--ease-out),
                box-shadow var(--dur-fast) var(--ease-out),
                background-color var(--dur-fast) var(--ease-out);
    will-change: transform;
}
.interactive:hover  { transform: translateY(-1px); }
.interactive:active { transform: translateY(0) scale(0.98); }

/* GPU acceleration hint */
.gpu-accelerated {
    transform: translateZ(0);
    backface-visibility: hidden;
    perspective: 1000px;
}

/* ═══════════════════ Scrollbar styling ═══════════════════ */
::-webkit-scrollbar       { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: var(--border-color-strong);
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    background-clip: padding-box;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
    border: 2px solid transparent;
    background-clip: padding-box;
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border-color-strong) transparent;
}

/* ═══════════════════ Selection styling ═══════════════════ */
::selection {
    background: var(--accent-subtle-hover);
    color: var(--text-primary);
}
::-moz-selection {
    background: var(--accent-subtle-hover);
    color: var(--text-primary);
}

/* ═══════════════════ Shared keyframes ═══════════════════ */
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}
@keyframes fadeOut {
    from { opacity: 1; }
    to   { opacity: 0; }
}
@keyframes slideUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-16px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes slideLeft {
    from { opacity: 0; transform: translateX(16px); }
    to   { opacity: 1; transform: translateX(0); }
}
@keyframes slideRight {
    from { opacity: 0; transform: translateX(-16px); }
    to   { opacity: 1; transform: translateX(0); }
}
@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.92); }
    to   { opacity: 1; transform: scale(1); }
}
@keyframes scaleOut {
    from { opacity: 1; transform: scale(1); }
    to   { opacity: 0; transform: scale(0.92); }
}
@keyframes pop {
    0%   { transform: scale(1); }
    50%  { transform: scale(1.08); }
    100% { transform: scale(1); }
}
@keyframes gentlePulse {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.55; }
}
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50%      { opacity: 0.5; }
}
@keyframes shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}
@keyframes glowPulse {
    0%, 100% { box-shadow: 0 0 0 0 var(--accent-glow); }
    50%      { box-shadow: 0 0 0 8px transparent; }
}
@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-6px); }
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-4px); }
}