:root {
  /* --- Material 3 Color System (Baseline Light) --- */
  --md-sys-color-primary: #0056d2;
  --md-sys-color-on-primary: #fff;
  --md-sys-color-primary-container: #dae2ff;
  --md-sys-color-on-primary-container: #00184a;
  --md-sys-color-secondary: #585e71;
  --md-sys-color-on-secondary: #fff;
  --md-sys-color-secondary-container: #dce2f9;
  --md-sys-color-on-secondary-container: #151b2c;
  --md-sys-color-tertiary: #735572;
  --md-sys-color-on-tertiary: #fff;
  --md-sys-color-tertiary-container: #fed7f9;
  --md-sys-color-on-tertiary-container: #2b122c;
  --md-sys-color-error: #ba1a1a;
  --md-sys-color-on-error: #fff;
  --md-sys-color-error-container: #ffdad6;
  --md-sys-color-on-error-container: #410002;
  --md-sys-color-background: #fdfbff;
  --md-sys-color-on-background: #1b1b1f;
  --md-sys-color-surface: #fdfbff;
  --md-sys-color-on-surface: #1b1b1f;
  --md-sys-color-surface-variant: #e1e2ec;
  --md-sys-color-on-surface-variant: #44474f;
  --md-sys-color-outline: #757780;
  --md-sys-color-outline-variant: #c5c6d0;
  --md-sys-color-surface-container-lowest: #fff;
  --md-sys-color-surface-container-low: #f7f3f9;
  --md-sys-color-surface-container: #f1edf3;
  --md-sys-color-surface-container-rgb: 241, 237, 243;
  --md-sys-color-surface-container-high: #ebe7ed;
  --md-sys-color-surface-container-high-rgb: 235, 231, 237;
  --md-sys-color-surface-container-highest: #e5e1e7;
  --md-sys-color-inverse-surface: #313033;
  --md-sys-color-inverse-on-surface: #f4eff4;

  /* --- Semantic Colors for Days (App specific) --- */
  --app-color-sunday: #d32f2f;
  --app-color-on-sunday: #fff;
  --app-color-saturday: #1976d2;
  --app-color-on-saturday: #fff;
  --app-color-weekday-active: var(--md-sys-color-tertiary);
  --app-color-on-weekday-active: var(--md-sys-color-on-tertiary);

  /* --- Semantic Close Button Color --- */
  --app-color-close: #ba1a1a;
  --app-color-close-secondary: #b71c1c;

  /* --- Fonts --- */
  --font-family: 'Roboto', 'Inter', 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Meiryo', 'Noto Sans KR', 'Noto Sans SC', 'Noto Sans Symbols', 'Noto Color Emoji', sans-serif;
  --standard-ui-font: 'Roboto', 'Inter', 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', 'Meiryo', 'Noto Sans JP', 'Noto Color Emoji', sans-serif;

  /* --- Spacing --- */
  --md-sys-spacing-0: 0px;
  --md-sys-spacing-0-5: 4px;
  --md-sys-spacing-1: 8px;
  --md-sys-spacing-1-5: 12px;
  --md-sys-spacing-2: 16px;
  --md-sys-spacing-3: 24px;
  --md-sys-spacing-4: 32px;
  --md-sys-spacing-5: 40px;
  --md-sys-spacing-6: 48px;
  --md-sys-spacing-7: 56px;
  --md-sys-spacing-8: 64px;

  /* --- Shape (Rounding) --- */
  --md-sys-shape-none: 0px;
  --md-sys-shape-extra-small: 4px;
  --md-sys-shape-small: 8px;
  --md-sys-shape-medium: 12px;
  --md-sys-shape-large: 16px;
  --md-sys-shape-extra-large: 28px;
  --md-sys-shape-full: 9999px;

  /* --- Elevation (Simplified Shadows) --- */
  --md-sys-elevation-1: 0px 1px 3px 1px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.30);
  --md-sys-elevation-2: 0px 2px 6px 2px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.30);
  --md-sys-elevation-3: 0px 1px 3px 0px rgba(0, 0, 0, 0.30), 0px 4px 8px 3px rgba(0, 0, 0, 0.15);

  /* --- Typography --- */
  --md-sys-typescale-display-large-size: 57px;
  --md-sys-typescale-display-large-line-height: 64px;
  --md-sys-typescale-display-large-weight: 400;
  --md-sys-typescale-headline-large-size: 32px;
  --md-sys-typescale-headline-large-line-height: 40px;
  --md-sys-typescale-headline-large-weight: 400;
  --md-sys-typescale-headline-medium-size: 28px;
  --md-sys-typescale-headline-medium-line-height: 36px;
  --md-sys-typescale-headline-medium-weight: 400;
  --md-sys-typescale-title-large-size: 22px;
  --md-sys-typescale-title-large-line-height: 28px;
  --md-sys-typescale-title-large-weight: 400;
  --md-sys-typescale-title-medium-size: 16px;
  --md-sys-typescale-title-medium-line-height: 24px;
  --md-sys-typescale-title-medium-weight: 500;
  --md-sys-typescale-body-large-size: 16px;
  --md-sys-typescale-body-large-line-height: 24px;
  --md-sys-typescale-body-large-weight: 400;
  --md-sys-typescale-label-large-size: 14px;
  --md-sys-typescale-label-large-line-height: 20px;
  --md-sys-typescale-label-large-weight: 500;

  /* Custom Category Tonal Presets (Mapped to M3 Roles) */
  --custom-cat-primary-container: #bbdefb; /* Blue 100 */
  --custom-cat-on-primary-container: #0d47a1;
  --custom-cat-secondary-container: #dcedc8; /* Light Green 100 */
  --custom-cat-on-secondary-container: #1b5e20;
  --custom-cat-tertiary-container: #e1bee7; /* Purple 100 */
  --custom-cat-on-tertiary-container: #4a148c;
  --custom-cat-error-container: #ffcdd2; /* Red 100 */
  --custom-cat-on-error-container: #b71c1c;
  --custom-cat-neutral-container: #cfd8dc; /* Blue Gray 100 */
  --custom-cat-on-neutral-container: #263238;
  --custom-cat-outline-container: #f5f5f5; /* Gray 100 */
  --custom-cat-on-outline-container: #212121;

  /* Additional M3-like Tonal Presets */
  --custom-cat-teal-container: #b2ebf2; /* Cyan 100 */
  --custom-cat-on-teal-container: #006064;
  --custom-cat-green-container: #c8e6c9; /* Green 100 */
  --custom-cat-on-green-container: #1b5e20;
  --custom-cat-yellow-container: #fff9c4; /* Yellow 100 */
  --custom-cat-on-yellow-container: #f57f17;
  --custom-cat-orange-container: #ffecb3; /* Amber 100 */
  --custom-cat-on-orange-container: #ff6f00;
  --custom-cat-pink-container: #f8bbd0; /* Pink 100 */
  --custom-cat-on-pink-container: #880e4f;
  --custom-cat-indigo-container: #d1c4e9; /* Deep Purple 100 */
  --custom-cat-on-indigo-container: #311b92;
  --custom-cat-brown-container: #d7ccc8; /* Brown 100 */
  --custom-cat-on-brown-container: #3e2723;
  --custom-cat-cyan-container: #b3e5fc; /* Light Blue 100 */
  --custom-cat-on-cyan-container: #01579b;

  /* Custom Category Main Colors (for dots and overlays) */
  --custom-cat-primary: #1976d2;
  --custom-cat-secondary: #7cb342;
  --custom-cat-tertiary: #8e24aa;
  --custom-cat-error: #d32f2f;
  --custom-cat-neutral: #546e7a;
  --custom-cat-outline: #9e9e9e;
  --custom-cat-teal: #0097a7;
  --custom-cat-green: #388e3c;
  --custom-cat-yellow: #fbc02d;
  --custom-cat-orange: #ffa000;
  --custom-cat-pink: #d81b60;
  --custom-cat-indigo: #5e35b1;
  --custom-cat-brown: #6d4c41;
  --custom-cat-cyan: #039be5;
  --custom-cat-on-main: #fff;
}

body.theme-dark {
  --md-sys-color-primary: #b1c5ff;
  --md-sys-color-on-primary: #002c72;
  --md-sys-color-primary-container: #0040a1;
  --md-sys-color-on-primary-container: #dae2ff;
  --md-sys-color-secondary: #c0c6dd;
  --md-sys-color-on-secondary: #2a3042;
  --md-sys-color-secondary-container: #404659;
  --md-sys-color-on-secondary-container: #dce2f9;
  --md-sys-color-tertiary: #e1bbdd;
  --md-sys-color-on-tertiary: #412742;
  --md-sys-color-tertiary-container: #593d59;
  --md-sys-color-on-tertiary-container: #fed7f9;
  --md-sys-color-error: #ffb4ab;
  --md-sys-color-on-error: #690005;
  --md-sys-color-error-container: #93000a;
  --md-sys-color-on-error-container: #ffdad6;
  --md-sys-color-background: #1b1b1f;
  --md-sys-color-on-background: #e5e1e6;
  --md-sys-color-surface: #1b1b1f;
  --md-sys-color-on-surface: #e5e1e6;
  --md-sys-color-surface-variant: #44474f;
  --md-sys-color-on-surface-variant: #c5c6d0;
  --md-sys-color-outline: #8f9099;
  --md-sys-color-outline-variant: #44474f;
  --md-sys-color-surface-container-lowest: #0f0f12;
  --md-sys-color-surface-container-low: #1b1b1f;
  --md-sys-color-surface-container: #1f1f23;
  --md-sys-color-surface-container-rgb: 31, 31, 35;
  --md-sys-color-surface-container-high: #2a292f;
  --md-sys-color-surface-container-high-rgb: 42, 41, 47;
  --md-sys-color-surface-container-highest: #35343a;
  --md-sys-color-inverse-surface: #e5e1e6;
  --md-sys-color-inverse-on-surface: #313033;

  /* Custom Category Tonal Presets (Dark - Mapped to M3 Roles) */
  --custom-cat-primary-container: #0d47a1;
  --custom-cat-on-primary-container: #bbdefb;
  --custom-cat-secondary-container: #1b5e20;
  --custom-cat-on-secondary-container: #dcedc8;
  --custom-cat-tertiary-container: #4a148c;
  --custom-cat-on-tertiary-container: #e1bee7;
  --custom-cat-error-container: #b71c1c;
  --custom-cat-on-error-container: #ffcdd2;
  --custom-cat-neutral-container: #263238;
  --custom-cat-on-neutral-container: #cfd8dc;
  --custom-cat-outline-container: #212121;
  --custom-cat-on-outline-container: #f5f5f5;

  /* Additional M3-like Tonal Presets (Dark) */
  --custom-cat-teal-container: #006064;
  --custom-cat-on-teal-container: #b2ebf2;
  --custom-cat-green-container: #1b5e20;
  --custom-cat-on-green-container: #c8e6c9;
  --custom-cat-yellow-container: #f57f17;
  --custom-cat-on-yellow-container: #fff9c4;
  --custom-cat-orange-container: #ff6f00;
  --custom-cat-on-orange-container: #ffecb3;
  --custom-cat-pink-container: #880e4f;
  --custom-cat-on-pink-container: #f8bbd0;
  --custom-cat-indigo-container: #311b92;
  --custom-cat-on-indigo-container: #d1c4e9;
  --custom-cat-brown-container: #3e2723;
  --custom-cat-on-brown-container: #d7ccc8;
  --custom-cat-cyan-container: #01579b;
  --custom-cat-on-cyan-container: #b3e5fc;

  /* Custom Category Main Colors (Dark) */
  --custom-cat-primary: #90caf9;
  --custom-cat-secondary: #aed581;
  --custom-cat-tertiary: #ce93d8;
  --custom-cat-error: #ef9a9a;
  --custom-cat-neutral: #90a4ae;
  --custom-cat-outline: #bdbdbd;
  --custom-cat-teal: #80deea;
  --custom-cat-green: #a5d6a7;
  --custom-cat-yellow: #fff59d;
  --custom-cat-orange: #ffcc80;
  --custom-cat-pink: #f48fb1;
  --custom-cat-indigo: #b39ddb;
  --custom-cat-brown: #bcaaa4;
  --custom-cat-cyan: #81d4fa;
  --custom-cat-on-main: #000;
}

/* Category Background & Text Colors (Shared Components) */

/* These classes serve dual purposes:
   1. Direct application of theme colors to UI elements.
   2. Definition of CSS variables for high-transparency overlays (see style.css and category-editor.css). */
.cat-primary {
    --current-cat-container: var(--custom-cat-primary-container);
    --current-cat-on-container: var(--custom-cat-on-primary-container);

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-retro-lcd {
    --current-cat-container: #9bbc0f;
    --current-cat-on-container: #0f380f;

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-retro-crt {
    --current-cat-container: #030c04;
    --current-cat-on-container: #3f3;

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-retro-nixie {
    --current-cat-container: #0c0603;
    --current-cat-on-container: #f50;

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-secondary {
    --current-cat-container: var(--custom-cat-secondary-container);
    --current-cat-on-container: var(--custom-cat-on-secondary-container);

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-tertiary {
    --current-cat-container: var(--custom-cat-tertiary-container);
    --current-cat-on-container: var(--custom-cat-on-tertiary-container);

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-error {
    --current-cat-container: var(--custom-cat-error-container);
    --current-cat-on-container: var(--custom-cat-on-error-container);

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-neutral {
    --current-cat-container: var(--custom-cat-neutral-container);
    --current-cat-on-container: var(--custom-cat-on-neutral-container);

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-outline {
    --current-cat-container: var(--custom-cat-outline-container);
    --current-cat-on-container: var(--custom-cat-on-outline-container);

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-teal {
    --current-cat-container: var(--custom-cat-teal-container);
    --current-cat-on-container: var(--custom-cat-on-teal-container);

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-green {
    --current-cat-container: var(--custom-cat-green-container);
    --current-cat-on-container: var(--custom-cat-on-green-container);

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-yellow {
    --current-cat-container: var(--custom-cat-yellow-container);
    --current-cat-on-container: var(--custom-cat-on-yellow-container);

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-orange {
    --current-cat-container: var(--custom-cat-orange-container);
    --current-cat-on-container: var(--custom-cat-on-orange-container);

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-pink {
    --current-cat-container: var(--custom-cat-pink-container);
    --current-cat-on-container: var(--custom-cat-on-pink-container);

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-indigo {
    --current-cat-container: var(--custom-cat-indigo-container);
    --current-cat-on-container: var(--custom-cat-on-indigo-container);

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-brown {
    --current-cat-container: var(--custom-cat-brown-container);
    --current-cat-on-container: var(--custom-cat-on-brown-container);

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-cyan {
    --current-cat-container: var(--custom-cat-cyan-container);
    --current-cat-on-container: var(--custom-cat-on-cyan-container);

    background-color: var(--current-cat-container) !important;
    color: var(--current-cat-on-container) !important;
}

.cat-primary-full { background-color: var(--custom-cat-primary) !important; }
.cat-secondary-full { background-color: var(--custom-cat-secondary) !important; }
.cat-tertiary-full { background-color: var(--custom-cat-tertiary) !important; }
.cat-error-full { background-color: var(--custom-cat-error) !important; }
.cat-neutral-full { background-color: var(--custom-cat-neutral) !important; }
.cat-outline-full { background-color: var(--custom-cat-outline) !important; }
.cat-teal-full { background-color: var(--custom-cat-teal) !important; }
.cat-green-full { background-color: var(--custom-cat-green) !important; }
.cat-yellow-full { background-color: var(--custom-cat-yellow) !important; }
.cat-orange-full { background-color: var(--custom-cat-orange) !important; }
.cat-pink-full { background-color: var(--custom-cat-pink) !important; }
.cat-indigo-full { background-color: var(--custom-cat-indigo) !important; }
.cat-brown-full { background-color: var(--custom-cat-brown) !important; }
.cat-cyan-full { background-color: var(--custom-cat-cyan) !important; }

/* ==========================================================================
   Shared Editor/Subproject Common Representations (Consolidated Styles)
   ========================================================================== */

/* Centered Content Wrappers */
.header-content-wrapper,
.main-content-wrapper,
.footer-content-wrapper {
    max-width: 1800px;
    width: 100%;
    margin: 0 auto;
}

/* Cards & Section Cards */
.card {
    background-color: var(--md-sys-color-surface-container-high);
    border-radius: 16px;
    padding: 20px;
    border: 1px solid var(--md-sys-color-outline-variant);
    box-shadow: var(--md-sys-elevation-1);
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

.section-card {
    background-color: var(--md-sys-color-surface-container-high);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    border: 1px solid var(--md-sys-color-outline-variant);
    box-shadow: var(--md-sys-elevation-1);
    transition: background-color 0.3s, color 0.3s, border-color 0.3s;
}

/* Privacy Badge */
.privacy-badge {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 16px;
    padding: 2px 8px;
    border-radius: 12px;
    background-color: var(--md-sys-color-surface-container);
    color: var(--md-sys-color-primary);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: help;
    border: 1px solid var(--md-sys-color-primary-container);
    transition: background-color 0.2s;
    white-space: nowrap;
}

.privacy-badge:hover {
    background-color: var(--md-sys-color-primary-container);
}

.privacy-badge .material-symbols-outlined {
    font-size: 16px;
}

@media (width <= 900px) {
    .privacy-text {
        display: none;
    }

    .privacy-badge {
        padding: 4px;
    }
}

/* Language Selection Dropdown */
.lang-select,
.lang-switcher select {
    background-color: var(--md-sys-color-surface-container-highest) !important;
    color: var(--md-sys-color-on-surface);
    border: 1px solid var(--md-sys-color-outline);
    border-radius: var(--md-sys-shape-extra-small, 4px);
    padding: 8px 12px;
    font-family: inherit;
    font-size: 0.9rem;
}

/* Theme / Toggle Switches (Unified standard M3 representation) */
.switch,
.theme-switch {
    display: inline-block;
    height: 24px;
    position: relative;
    width: 48px;
    flex-shrink: 0;
}

.switch input,
.theme-switch input {
    display: none !important;
}

.switch .slider,
.theme-switch .slider {
    background-color: var(--md-sys-color-outline-variant);
    cursor: pointer;
    inset: 0;
    position: absolute;
    transition: 0.4s;
    border-radius: 34px;
}

.switch .slider::before,
.theme-switch .slider::before {
    background-color: #fff;
    bottom: 4px;
    content: "";
    height: 16px;
    left: 4px;
    position: absolute;
    transition: 0.4s;
    width: 16px;
    border-radius: 50%;
}

.switch input:checked + .slider,
.theme-switch input:checked + .slider {
    background-color: var(--md-sys-color-primary);
}

.switch input:checked + .slider::before,
.theme-switch input:checked + .slider::before {
    transform: translateX(24px);
}

/* Undo/Redo History Controls */
.history-controls {
    display: flex;
    gap: 4px;
    margin-left: 12px;
}

/* Title icon color matching */
.title-icon {
    font-size: 1.5rem !important;
    color: var(--md-sys-color-primary) !important;
}

/* Apply button style */
.apply-btn {
    width: auto;
    padding: 10px 24px;
    border-radius: var(--md-sys-shape-medium, 12px);
    background: linear-gradient(135deg, #0d47a1 0%, #4a148c 100%);
    color: #fff !important;
    font-size: 0.95rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s, filter 0.2s, box-shadow 0.2s;
}

.apply-btn:active {
    transform: translateY(0);
}

.apply-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.apply-btn:not(:disabled):hover {
    filter: brightness(1.15);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
    transform: translateY(-2px);
}

/* Close button style */
.close-btn {
    width: auto;
    padding: 10px 24px;
    border-radius: var(--md-sys-shape-medium, 12px);
    background: linear-gradient(135deg, var(--app-color-close) 0%, var(--app-color-close-secondary) 100%);
    color: #fff !important;
    font-size: 0.95rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s, filter 0.2s, box-shadow 0.2s;
}

.close-btn:hover {
    filter: brightness(1.15);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
    transform: translateY(-2px);
}

.close-btn:active {
    transform: translateY(0);
}

/* --- Shared Tertiary Button Styles --- */
.tertiary-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 100px;
  border: 1px solid var(--md-sys-color-outline);
  background-color: transparent;
  color: var(--md-sys-color-primary);
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
}

.tertiary-btn:hover {
  background-color: var(--md-sys-color-surface-container-highest);
}

/* --- Shared Danger-themed Clear/Reset Buttons --- */
#clear-all-btn,
#reset-btn,
#alarm-reset-btn {
  color: var(--md-sys-color-error) !important;
}