/* ===== Google Material Design 3 (M3) Design System - Refined Harmony ===== */
/* Based on Material You principles with a soothing, harmonious palette */

/* ===== M3 Color Tokens - Dark Theme (Soothing/Dịu mắt) ===== */
:root {
    /* Primary - Mapped to Global Accent */
    --md-primary: var(--accent);
    --md-on-primary: #ffffff;
    --md-primary-container: color-mix(in srgb, var(--accent) 20%, transparent);
    /* Tinted glass */
    --md-on-primary-container: var(--accent);
    /* Text matches accent */

    /* Secondary - Mapped to Accent mix */
    --md-secondary: color-mix(in srgb, var(--accent) 70%, #808080);
    --md-on-secondary: #ffffff;
    --md-secondary-container: color-mix(in srgb, var(--accent) 15%, #2a3042);
    --md-on-secondary-container: #e1e2e9;

    /* Tertiary - Mapped to Accent mix */
    --md-tertiary: color-mix(in srgb, var(--accent) 50%, #a0cfd0);
    --md-on-tertiary: #ffffff;
    --md-tertiary-container: color-mix(in srgb, var(--accent) 10%, #1e4e4f);
    --md-on-tertiary-container: #bcebef;

    /* Error - Keep Red */
    --md-error: #ffb4ab;
    --md-on-error: #690005;
    --md-error-container: #93000a;
    --md-on-error-container: #ffdad6;

    /* Surface - Deep Blue-Grey (Not Black) -> Now Dynamic! */
    --md-surface: var(--bg-primary);
    /* Very deep blue-grey */
    --md-surface-dim: var(--bg-primary);
    --md-surface-bright: var(--bg-hover);

    /* Surface Containers - for hierarchy */
    --md-surface-container-lowest: var(--base-dark);
    --md-surface-container-low: var(--bg-secondary);
    /* Slightly lighter than bg */
    --md-surface-container: var(--bg-card);
    /* Default card bg */
    --md-surface-container-high: var(--bg-card-solid);
    /* Hover intent or elevated */
    --md-surface-container-highest: var(--bg-hover);

    /* On Surface */
    --md-on-surface: #e1e2e9;
    --md-on-surface-variant: #c3c6cf;
    --md-outline: #8d9199;
    --md-outline-variant: #43474e;

    /* M3 Surface Tints for Elevation (Dark Mode Overlay) */
    --md-surface-tint: #b0c6ff;

    /* Custom Success */
    --md-success: #8cd6b5;
    --md-on-success: #003823;
    --md-success-container: #005134;
    --md-on-success-container: #a7f2d0;

    /* M3 Elevation with Surface Tint (Crucial for M3 Dark Mode look) */
    --md-elevation-1: linear-gradient(0deg, rgba(176, 198, 255, 0.05), rgba(176, 198, 255, 0.05)), var(--md-surface-container-low);
    --md-elevation-2: linear-gradient(0deg, rgba(176, 198, 255, 0.08), rgba(176, 198, 255, 0.08)), var(--md-surface-container-low);
    --md-elevation-3: linear-gradient(0deg, rgba(176, 198, 255, 0.11), rgba(176, 198, 255, 0.11)), var(--md-surface-container-low);

    /* Softer Shadows */
    --md-shadow-1: 0 1px 3px 0 rgba(0, 0, 0, 0.12), 0 1px 2px -1px rgba(0, 0, 0, 0.24);
    --md-shadow-2: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --md-shadow-3: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);

    /* Shapes */
    --md-shape-xs: 4px;
    --md-shape-sm: 8px;
    --md-shape-md: 16px;
    /* Increased for softer look */
    --md-shape-lg: 24px;
    --md-shape-xl: 32px;
    --md-shape-full: 9999px;

    /* Motion */
    --md-motion-duration-short: 200ms;
    --md-motion-duration-medium: 300ms;
    /* Slightly slower for elegance */
    --md-motion-easing-standard: cubic-bezier(0.2, 0.0, 0, 1.0);

    /* Typography */
    --md-font: 'Roboto', system-ui, sans-serif;
}

/* ===== M3 Color Tokens - Light Theme (Soft/Airy) ===== */
[data-theme="light"] {
    /* Primary/Secondary/Tertiary map to current accent (Material You style) */
    --md-primary: var(--accent);
    --md-on-primary: #ffffff;
    --md-primary-container: color-mix(in srgb, var(--accent) 18%, #ffffff);
    --md-on-primary-container: var(--accent);

    --md-secondary: color-mix(in srgb, var(--accent) 70%, #808080);
    --md-on-secondary: #ffffff;
    --md-secondary-container: color-mix(in srgb, var(--accent) 10%, #f3edf7);
    --md-on-secondary-container: var(--md-on-surface);

    --md-tertiary: color-mix(in srgb, var(--accent) 50%, #a0cfd0);
    --md-on-tertiary: #ffffff;
    --md-tertiary-container: color-mix(in srgb, var(--accent) 10%, #bcebef);
    --md-on-tertiary-container: var(--md-on-surface);

    /* Surface - Material You tinted off-whites (dynamic by current accent) */
    --md-surface: color-mix(in srgb, var(--accent) 3%, #fdfbff);
    --md-surface-dim: color-mix(in srgb, var(--accent) 3%, #ded8e1);
    --md-surface-bright: color-mix(in srgb, var(--accent) 3%, #fdfbff);

    /* Containers: progressively stronger tint for clearer hierarchy */
    --md-surface-container-lowest: color-mix(in srgb, var(--accent) 2%, #ffffff);
    --md-surface-container-low: color-mix(in srgb, var(--accent) 4%, #f7f2fa);
    --md-surface-container: color-mix(in srgb, var(--accent) 6%, #f3edf7);
    --md-surface-container-high: color-mix(in srgb, var(--accent) 8%, #ece6f0);
    --md-surface-container-highest: color-mix(in srgb, var(--accent) 10%, #e6e0e9);

    --md-on-surface: #1a1b1f;
    --md-on-surface-variant: #44474f;
    --md-outline: #74777f;
    --md-outline-variant: #c4c6cf;

    /* Shadows */
    --md-shadow-1: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --md-shadow-2: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
}

/* Typography Scale - Refined */
.md-display-large {
    font-family: var(--md-font);
    font-size: 57px;
    line-height: 64px;
    letter-spacing: -0.25px;
}

.md-headline-large {
    font-family: var(--md-font);
    font-size: 32px;
    line-height: 40px;
}

.md-title-medium {
    font-family: var(--md-font);
    font-size: 16px;
    font-weight: 500;
    line-height: 24px;
    letter-spacing: 0.15px;
}

.md-body-large {
    font-family: var(--md-font);
    font-size: 16px;
    line-height: 24px;
    letter-spacing: 0.5px;
}

/* ... (Keep other component classes same as previous but they will inherit new vars) ... */

/* Buttons */
.md-btn-filled {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    min-height: 40px;
    background: var(--md-primary);
    color: var(--md-on-primary);
    border: none;
    border-radius: var(--md-shape-full);
    font-family: var(--md-font);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-standard);
    box-shadow: none;
    /* Flat by default in M3 unless elevated */
}

.md-btn-filled:hover {
    box-shadow: var(--md-shadow-1);
    background: linear-gradient(0deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.08)), var(--md-primary);
}

.md-btn-tonal {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    min-height: 40px;
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
    border: none;
    border-radius: var(--md-shape-full);
    font-family: var(--md-font);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-standard);
}

.md-btn-tonal:hover {
    box-shadow: var(--md-shadow-1);
    background: linear-gradient(0deg, rgba(29, 27, 32, 0.08), rgba(29, 27, 32, 0.08)), var(--md-secondary-container);
}

/* Cards now use dynamic color-mix variables from common.css for Material You tinting */
.md-card-elevated {
    background: var(--bg-card);
    /* Dynamic tinted background */
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: var(--md-shape-md);
    box-shadow: var(--md-shadow-1);
    transition: all var(--md-motion-duration-medium) var(--md-motion-easing-standard);
}

/* Dark mode elevation overlay trick - adjusted for glass */
[data-theme="dark"] .md-card-elevated {
    background: var(--glass-material);
    box-shadow: var(--glass-shadow);
}

.md-card-elevated:hover {
    transform: translateY(-2px);
    box-shadow: var(--md-shadow-2);
}

[data-theme="dark"] .md-card-elevated:hover {
    background: color-mix(in srgb, var(--accent) 8%, rgba(30, 30, 40, 0.75));
    border-color: rgba(255, 255, 255, 0.2);
}

.md-card-filled {
    background: var(--bg-card-solid);
    /* Solid tinted background */
    border-radius: var(--md-shape-md);
    border: 1px solid transparent;
}

.md-card-outlined {
    background: var(--bg-primary);
    /* Blend with background */
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--md-shape-md);
}

/* Navigation Rail/Bar Items */
.md-nav-item {
    padding: 12px 24px;
    /* More roomy */
    border-radius: var(--md-shape-full);
    color: var(--md-on-surface-variant);
    font-weight: 500;
    transition: all var(--md-motion-duration-short);
}

.md-nav-item.active {
    background: var(--md-secondary-container);
    color: var(--md-on-secondary-container);
    font-weight: 600;
}

/* Progress Linear */
.md-progress-linear {
    height: 6px;
    /* Slightly taller */
    background: var(--md-surface-container-highest);
    border-radius: var(--md-shape-full);
    overflow: hidden;
}

.md-progress-linear-fill {
    height: 100%;
    background: var(--md-primary);
    border-radius: var(--md-shape-full);
}