:root {
    --bg-primary: #f4f6f9;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f8f9fa;
    --bg-hover: #f0f4ff;
    --text-primary: #1a1a2e;
    --text-secondary: #333333;
    --text-muted: #888888;
    --text-faint: #999999;
    --border-color: #e4e4e4;
    --border-light: #e8e8e8;
    --shadow-sm: rgba(0,0,0,0.08);
    --shadow-md: rgba(0,0,0,0.15);
    --header-bg: #1a1a2e;
    --header-text: #ffffff;
    --link-color: #4a6cf7;
    --link-hover: #2d4fd6;
    --input-bg: #fafbfc;
    --input-border: #d1d5db;
    --dropdown-bg: #ffffff;
    --footer-bg: #ffffff;
    --btn-danger-bg: #E74C3C;
    --btn-success-bg: #27AE60;
    --warning-text: #E67E22;
    --match-abom-bg: #FFF8E1;
    --match-abom-border: #FFD54F;
    --match-kss-bg: #E3F2FD;
    --match-kss-border: #64B5F6;
    --match-confirmed-bg: #f0faf4;
    --match-confirmed-border: #27AE60;
}

[data-theme="dark"] {
    --bg-primary: #121218;
    --bg-secondary: #1e1e2a;
    --bg-tertiary: #252535;
    --bg-hover: #2a2a3e;
    --text-primary: #e0e0e8;
    --text-secondary: #c0c0cc;
    --text-muted: #888899;
    --text-faint: #666677;
    --border-color: #333345;
    --border-light: #2a2a3c;
    --shadow-sm: rgba(0,0,0,0.3);
    --shadow-md: rgba(0,0,0,0.5);
    --header-bg: #0d0d16;
    --header-text: #e0e0e8;
    --link-color: #7b9cff;
    --link-hover: #a0b8ff;
    --input-bg: #1e1e2a;
    --input-border: #444458;
    --dropdown-bg: #1e1e2a;
    --footer-bg: #1a1a24;
    --btn-danger-bg: #c0392b;
    --btn-success-bg: #229954;
    --warning-text: #e0943a;
    --match-abom-bg: #3a3520;
    --match-abom-border: #8a7530;
    --match-kss-bg: #1e2a3a;
    --match-kss-border: #3a6a9a;
    --match-confirmed-bg: #1e3028;
    --match-confirmed-border: #229954;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    transition: background 0.25s, color 0.25s;
}

.db-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--header-bg);
    color: var(--header-text);
    padding: 0 24px;
    height: 52px;
    position: sticky;
    top: 0;
    z-index: 900;
    box-shadow: 0 2px 8px var(--shadow-md);
}

.db-header-left {
    display: flex;
    align-items: center;
    min-width: 100px;
}

.db-logo {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    letter-spacing: 0.5px;
}

.db-logo:hover {
    color: #a3bffa;
}

.db-header-center {
    flex: 1;
    text-align: center;
}

.db-page-title {
    font-size: 16px;
    font-weight: 600;
    color: rgba(255,255,255,0.9);
    letter-spacing: 0.3px;
}

.db-header-right {
    display: flex;
    align-items: center;
    min-width: 100px;
    justify-content: flex-end;
}

.db-settings-wrapper {
    position: relative;
}

.db-settings-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(255,255,255,0.1);
    color: #fff;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.db-settings-btn:hover {
    background: rgba(255,255,255,0.2);
    transform: rotate(30deg);
}

.db-settings-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--dropdown-bg);
    border-radius: 10px;
    box-shadow: 0 8px 30px var(--shadow-md), 0 2px 8px var(--shadow-sm);
    min-width: 240px;
    max-height: 80vh;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
    border: 1px solid var(--border-color);
}

.db-settings-dropdown.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.db-settings-dropdown-header {
    padding: 12px 16px 8px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--text-muted);
}

.db-settings-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: background 0.15s;
}

.db-settings-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.db-settings-icon {
    font-size: 16px;
    width: 22px;
    text-align: center;
}

.db-settings-divider {
    height: 1px;
    background: var(--border-light);
    margin: 4px 12px;
}

.db-settings-section {
    overflow: hidden;
}

.db-settings-section-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    padding: 10px 16px;
    border: none;
    background: none;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.15s;
    text-align: left;
}

.db-settings-section-toggle:hover {
    background: var(--bg-hover);
}

.db-section-arrow {
    font-size: 9px;
    color: var(--text-muted);
    transition: transform 0.2s;
    display: inline-block;
}

.db-settings-section.expanded .db-section-arrow {
    transform: rotate(90deg);
}

.db-settings-section-body {
    display: none;
    padding-left: 8px;
}

.db-settings-section.expanded .db-settings-section-body {
    display: block;
}

.db-settings-section-body .db-settings-item {
    padding: 6px 16px 6px 24px;
    font-size: 12px;
}

.db-theme-toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px 10px 24px;
}

.db-theme-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.db-theme-switch {
    display: flex;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.db-theme-option {
    padding: 5px 14px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    background: var(--bg-tertiary);
    color: var(--text-muted);
    transition: background 0.15s, color 0.15s;
    user-select: none;
}

.db-theme-option.active {
    background: var(--header-bg);
    color: #fff;
}

.db-theme-option:hover:not(.active) {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.db-theme-label-group {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.db-theme-label-desc {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 400;
}

.db-section-timelines-content {
    max-height: 400px;
    overflow-y: auto;
}

.db-section-timelines-loading {
    padding: 10px 14px;
    color: var(--text-muted);
    font-size: 12px;
}

.db-st-project {
    border-bottom: 1px solid var(--border-color);
}

.db-st-project:last-child {
    border-bottom: none;
}

.db-st-project-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 100%;
    padding: 8px 14px;
    background: none;
    border: none;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    text-align: left;
    transition: background 0.15s;
}

.db-st-project-toggle:hover {
    background: var(--bg-hover);
}

.db-st-project-toggle .db-section-arrow {
    font-size: 8px;
    transition: transform 0.15s;
}

.db-st-project.expanded > .db-st-project-toggle .db-section-arrow {
    transform: rotate(90deg);
}

.db-st-project-body {
    display: none;
    padding-left: 12px;
}

.db-st-project.expanded > .db-st-project-body {
    display: block;
}

.db-st-section-link {
    font-size: 12px;
    padding: 5px 14px !important;
}

.db-main {
    padding: 16px 24px;
    min-height: calc(100vh - 52px - 48px);
}

.db-footer {
    text-align: center;
    padding: 14px 24px;
    color: var(--text-faint);
    font-size: 12px;
    border-top: 1px solid var(--border-color);
    background: var(--footer-bg);
}

h2 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

button {
    font-family: inherit;
    font-size: 13px;
    cursor: pointer;
}

a {
    color: var(--link-color);
}

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

select, input[type="text"], input[type="number"], input[type="date"], input[type="datetime-local"] {
    background: var(--input-bg);
    color: var(--text-primary);
    border-color: var(--input-border);
}

@media (max-width: 768px) {
    .db-header {
        padding: 0 12px;
        height: 48px;
    }

    .db-page-title {
        font-size: 14px;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 50vw;
    }

    .db-main {
        padding: 12px;
    }

    .db-settings-btn {
        width: 44px;
        height: 44px;
    }

    .db-settings-dropdown {
        right: -8px;
        min-width: 200px;
    }
}

@media (max-width: 480px) {
    .db-header {
        height: 44px;
        padding: 0 8px;
    }

    .db-main {
        padding: 8px;
    }

    .db-page-title {
        font-size: 13px;
        max-width: 40vw;
    }

    .db-logo {
        font-size: 16px;
    }
}

@media print {
    .db-header {
        display: none !important;
    }

    .db-footer {
        display: none !important;
    }

    .db-main {
        padding: 0;
    }
}

.cascading-filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    padding: 14px 18px;
    margin-bottom: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    align-items: flex-end;
}

.cascading-filter-step {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 160px;
}

.cascading-filter-label {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.cascading-filter-select {
    padding: 7px 12px;
    border-radius: 6px;
    border: 1px solid var(--input-border);
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    outline: none;
    transition: border-color 0.2s;
}

.cascading-filter-select:focus {
    border-color: var(--link-color);
}

.cascading-filter-select:hover {
    border-color: var(--text-muted);
}