:root {
    --bg-color: #0f172a;
    /* Slate 900 */
    --sidebar-bg: #1e293b;
    /* Slate 800 */
    --sidebar-border: #334155;
    /* Slate 700 */
    --text-main: #f8fafc;
    /* Slate 50 */
    --text-muted: #94a3b8;
    /* Slate 400 */
    --primary: #3b82f6;
    /* Blue 500 */
    --primary-hover: #60a5fa;
    /* Blue 400 */
    --danger: #ef4444;
    /* Red 500 */
    --danger-bg: rgba(239, 68, 68, 0.1);
    --success: #10b981;
    /* Emerald 500 */
    --success-bg: rgba(16, 185, 129, 0.1);
    --warning: #f59e0b;
    /* Amber 500 */
    --warning-bg: rgba(245, 158, 11, 0.1);
    --white: #1e293b;
    /* Re-used for panels/cards */
    --input-border: #475569;
    /* Slate 600 */
    --input-bg: #0f172a;
    --input-focus: #3b82f6;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.5);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.4);
    --transition: all 0.2s ease-in-out;
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-color);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* --- Layouts --- */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.app-body {
    display: flex;
    min-height: 100vh;
}

/* --- Sidebar --- */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 10;
}

.sidebar-header {
    padding: 24px 24px;
    border-bottom: 1px solid var(--sidebar-border);
}

.sidebar-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.025em;
}

.sidebar-nav {
    flex: 1;
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    border-radius: 8px;
    transition: var(--transition);
}

.sidebar-nav a:hover {
    background-color: #334155;
    color: var(--text-main);
}

.sidebar-nav a.active {
    background-color: var(--primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.sidebar-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--sidebar-border);
}

.user-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.user-info span {
    font-size: 0.875rem;
    font-weight: 600;
}

.logout-btn {
    color: var(--text-muted);
    transition: var(--transition);
}

.logout-btn:hover {
    color: var(--danger);
}

/* --- Main Content --- */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 32px 48px;
}

.page-header {
    margin-bottom: 32px;
}

.page-title {
    font-size: 1.875rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--text-main);
}

/* --- Login Form --- */
.login-container {
    background: var(--white);
    padding: 48px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 440px;
}

.login-container h1 {
    font-size: 1.875rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 32px;
    color: var(--text-main);
}

.form-group {
    margin-bottom: 24px;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-main);
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    background-color: var(--input-bg);
    color: var(--text-main);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    outline: none;
}

.form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.btn-primary {
    display: block;
    width: 100%;
    padding: 14px 16px;
    background-color: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 24px;
    font-size: 0.875rem;
    font-weight: 500;
}

.alert-danger {
    background-color: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

/* --- Badges --- */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1.25rem;
    white-space: nowrap;
}

.badge-blue {
    background-color: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.badge-green {
    background-color: var(--success-bg);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-amber {
    background-color: var(--warning-bg);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-red {
    background-color: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-gray {
    background-color: rgba(148, 163, 184, 0.1);
    color: var(--text-muted);
    border: 1px solid rgba(148, 163, 184, 0.2);
}

/* ─── Rich Text Editor ─────────────────────────────────────────── */
.rte-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: 1px solid transparent;
    border-radius: 5px;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: background 0.15s, color 0.15s, border-color 0.15s;
    flex-shrink: 0;
}
.rte-btn:hover {
    background: rgba(59,130,246,0.1);
    color: var(--primary);
    border-color: rgba(59,130,246,0.2);
}
.rte-btn.active {
    background: rgba(59,130,246,0.15);
    color: var(--primary);
    border-color: rgba(59,130,246,0.3);
}
.rte-sep {
    width: 1px;
    height: 20px;
    background: var(--sidebar-border);
    margin: 0 4px;
    flex-shrink: 0;
}
#action-body-editor:empty:before {
    content: attr(data-placeholder);
    color: var(--text-muted);
    pointer-events: none;
    font-style: italic;
}
#action-body-editor img {
    max-width: 100%;
    cursor: pointer;
}
#action-body-editor img.rte-selected {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}
#action-body-editor a {
    color: #3b82f6;
}
#action-body-editor ul {
    padding-left: 20px;
    margin: 6px 0;
}

#tpl-body-editor:empty:before,
#release-body-editor:empty:before {
    content: attr(data-placeholder);
    color: var(--text-muted);
    pointer-events: none;
    font-style: italic;
}
#tpl-body-editor img,
#release-body-editor img {
    max-width: 100%;
    cursor: pointer;
}
#tpl-body-editor img.rte-selected,
#release-body-editor img.rte-selected {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}
#tpl-body-editor a,
#release-body-editor a {
    color: #3b82f6;
}
#tpl-body-editor ul,
#release-body-editor ul {
    padding-left: 20px;
    margin: 6px 0;
}

/* --- Filter Chips --- */
.filter-chip {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    background-color: var(--input-bg);
    border: 1px solid var(--sidebar-border);
    border-radius: 9999px;
    font-size: 0.825rem;
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    user-select: none;
    transition: var(--transition);
}

.filter-chip:hover {
    background-color: #334155;
    color: var(--text-main);
}

.filter-chip-checkbox {
    display: none;
}

.filter-chip-checkbox:checked+.filter-chip {
    background-color: var(--primary);
    color: var(--white);
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.3);
}