/**
 * BOGEM BILLING — MASTER GLOBAL CSS
 * Terpusat, Terorganisasi, dan Responsif Menggunakan CSS Variables.
 * 
 * Sesuai Master Prompt Bagian 3: Identitas Visual dan Tema
 * Mendukung 4 Tema fungsional:
 * 1. Merah (Default BOGEM)
 * 2. Biru Dongker
 * 3. Gelap (Dark Mode)
 * 4. Terang (Light Clean Mode)
 */

/* ==========================================================================
   1. CSS VARIABLES & THEMES
   ========================================================================== */

:root, [data-theme="merah"] {
    --primary: #990000;
    --primary-hover: #b30000;
    --primary-light: #ffebec;
    --primary-gradient: linear-gradient(135deg, #800000 0%, #b30000 100%);
    --accent: #dc2626;

    --bg-body: #f8fafc;
    --bg-surface: #ffffff;
    --bg-surface-secondary: #f1f5f9;
    --bg-sidebar: #1e1e24;
    --bg-sidebar-active: #990000;
    --bg-sidebar-hover: rgba(255, 255, 255, 0.08);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-inverse: #ffffff;
    --text-sidebar: #cbd5e1;
    --text-sidebar-active: #ffffff;

    --border-color: #e2e8f0;
    --border-color-focus: #990000;
    
    --success: #16a34a;
    --success-light: #dcfce7;
    --warning: #d97706;
    --warning-light: #fef3c7;
    --danger: #dc2626;
    --danger-light: #fee2e2;
    --info: #0284c7;
    --info-light: #e0f2fe;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;

    --sidebar-width: 260px;
    --sidebar-collapsed-width: 70px;
    --header-height: 64px;
}

[data-theme="biru"] {
    --primary: #0f4c81;
    --primary-hover: #1664a7;
    --primary-light: #e2effa;
    --primary-gradient: linear-gradient(135deg, #0a2540 0%, #0f4c81 100%);
    --accent: #0284c7;

    --bg-body: #f3f6f9;
    --bg-surface: #ffffff;
    --bg-surface-secondary: #e9eef4;
    --bg-sidebar: #0a192f;
    --bg-sidebar-active: #0f4c81;
    --bg-sidebar-hover: rgba(255, 255, 255, 0.08);

    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --text-inverse: #ffffff;
    --text-sidebar: #94a3b8;
    --text-sidebar-active: #ffffff;

    --border-color: #d8e2ed;
    --border-color-focus: #0f4c81;
}

[data-theme="gelap"] {
    --primary: #b91c1c;
    --primary-hover: #dc2626;
    --primary-light: rgba(185, 28, 28, 0.2);
    --primary-gradient: linear-gradient(135deg, #7f1d1d 0%, #b91c1c 100%);
    --accent: #f87171;

    --bg-body: #0b0f19;
    --bg-surface: #111827;
    --bg-surface-secondary: #1f2937;
    --bg-sidebar: #0f1422;
    --bg-sidebar-active: #b91c1c;
    --bg-sidebar-hover: rgba(255, 255, 255, 0.05);

    --text-primary: #f9fafb;
    --text-secondary: #d1d5db;
    --text-muted: #9ca3af;
    --text-inverse: #0b0f19;
    --text-sidebar: #9ca3af;
    --text-sidebar-active: #ffffff;

    --border-color: #374151;
    --border-color-focus: #ef4444;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.5);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.5);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5);
}

[data-theme="terang"] {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --primary-gradient: linear-gradient(135deg, #1d4ed8 0%, #3b82f6 100%);
    --accent: #3b82f6;

    --bg-body: #ffffff;
    --bg-surface: #f8fafc;
    --bg-surface-secondary: #f1f5f9;
    --bg-sidebar: #f8fafc;
    --bg-sidebar-active: #2563eb;
    --bg-sidebar-hover: rgba(37, 99, 235, 0.08);

    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --text-inverse: #ffffff;
    --text-sidebar: #475569;
    --text-sidebar-active: #ffffff;

    --border-color: #e2e8f0;
    --border-color-focus: #2563eb;
}

/* ==========================================================================
   2. BASE RESET & TYPOGRAPHY
   ========================================================================== */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 0.925rem;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-body);
    transition: background-color 0.25s ease, color 0.25s ease;
    overflow-x: hidden;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.15s ease;
}

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

/* ==========================================================================
   3. APP LAYOUT STRUCTURE (HEADER, SIDEBAR, MAIN)
   ========================================================================== */

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

/* Sidebar */
.app-sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    color: var(--text-sidebar);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 100;
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1), margin-left 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
}

.app-sidebar::-webkit-scrollbar {
    width: 5px;
}
.app-sidebar::-webkit-scrollbar-track {
    background: transparent;
}
.app-sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.18);
    border-radius: 999px;
}
.app-sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.35);
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.15rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    flex-shrink: 0;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    font-weight: 700;
    font-size: 1.1rem;
    color: #ffffff;
    text-decoration: none;
}

.brand-badge {
    background: var(--primary);
    color: #fff;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 800;
    letter-spacing: 0.5px;
}

.sidebar-close-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-sidebar);
    cursor: pointer;
    padding: 0.35rem;
    border-radius: var(--radius-sm);
    transition: color 0.15s ease, background-color 0.15s ease;
}
.sidebar-close-btn:hover {
    color: #ffffff;
    background-color: var(--bg-sidebar-hover);
}

.sidebar-nav {
    flex: 1;
    padding: 0.65rem 0 2.5rem;
}

.nav-section-title {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    padding: 1rem 1.15rem 0.35rem;
    color: var(--text-muted);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-section-title::after {
    content: "";
    flex: 1;
    height: 1px;
    background: rgba(255, 255, 255, 0.07);
}

.nav-item {
    list-style: none;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.55rem 0.85rem;
    margin: 0.15rem 0.65rem;
    border-radius: var(--radius-sm);
    color: var(--text-sidebar);
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.15s ease;
    border-left: 3px solid transparent;
}

.nav-link:hover {
    color: #ffffff;
    background-color: var(--bg-sidebar-hover);
    transform: translateX(2px);
}

.nav-link.active {
    color: #ffffff;
    background-color: var(--bg-sidebar-active);
    border-left-color: #ffffff;
    font-weight: 600;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

.nav-icon {
    width: 1.15rem;
    height: 1.15rem;
    flex-shrink: 0;
    fill: currentColor;
    opacity: 0.85;
}
.nav-link.active .nav-icon {
    opacity: 1;
}

/* Main Area */
.app-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Desktop Collapsed Sidebar State */
body.sidebar-collapsed .app-sidebar {
    transform: translateX(-100%);
}
body.sidebar-collapsed .app-main {
    margin-left: 0;
}

/* Sidebar Backdrop on Mobile */
.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 95;
    backdrop-filter: blur(2px);
    transition: opacity 0.25s ease;
}
.sidebar-backdrop.active {
    display: block;
}

/* Header */
.app-header {
    height: var(--header-height);
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.75rem;
    position: sticky;
    top: 0;
    z-index: 90;
    box-shadow: var(--shadow-sm);
}

.header-left, .header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.content-body {
    padding: 1.75rem;
    flex: 1;
}

/* Footer */
.app-footer {
    padding: 1rem 1.75rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-surface);
    font-size: 0.825rem;
    color: var(--text-muted);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ==========================================================================
   4. UI COMPONENTS (CARDS, STATS, BUTTONS, FORMS, TABLES)
   ========================================================================== */

/* Cards */
.card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-body {
    padding: 1.25rem;
}

.card-footer {
    padding: 0.75rem 1.25rem;
    background-color: var(--bg-surface-secondary);
    border-top: 1px solid var(--border-color);
    border-bottom-left-radius: var(--radius-md);
    border-bottom-right-radius: var(--radius-md);
}

/* Stat Grid */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary);
}

.stat-card.stat-success { border-left-color: var(--success); }
.stat-card.stat-warning { border-left-color: var(--warning); }
.stat-card.stat-danger  { border-left-color: var(--danger); }
.stat-card.stat-info    { border-left-color: var(--info); }

.stat-title {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 0.25rem;
}

.stat-subtext {
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-light);
    color: var(--primary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.55rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    line-height: 1.25;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--primary);
    color: #ffffff;
}
.btn-primary:hover {
    background-color: var(--primary-hover);
    color: #ffffff;
}

.btn-secondary {
    background-color: var(--bg-surface-secondary);
    color: var(--text-secondary);
    border-color: var(--border-color);
}
.btn-secondary:hover {
    background-color: var(--border-color);
    color: var(--text-primary);
}

.btn-success { background-color: var(--success); color: #fff; }
.btn-success:hover { background-color: #15803d; color: #fff; }

.btn-danger { background-color: var(--danger); color: #fff; }
.btn-danger:hover { background-color: #b91c1c; color: #fff; }

.btn-sm {
    padding: 0.35rem 0.65rem;
    font-size: 0.8rem;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.55rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
}

.badge-success { background-color: var(--success-light); color: var(--success); }
.badge-warning { background-color: var(--warning-light); color: var(--warning); }
.badge-danger  { background-color: var(--danger-light);  color: var(--danger); }
.badge-info    { background-color: var(--info-light);    color: var(--info); }
.badge-secondary { background-color: var(--bg-surface-secondary); color: var(--text-secondary); }

/* Tables */
.table-responsive {
    width: 100%;
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

.table th {
    padding: 0.75rem 1rem;
    background-color: var(--bg-surface-secondary);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}

.table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    vertical-align: middle;
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 0, 0, 0.015);
}

.table-hover tbody tr:hover {
    background-color: var(--primary-light);
}

/* Forms */
.form-group {
    margin-bottom: 1.15rem;
}

.form-label {
    display: block;
    margin-bottom: 0.35rem;
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.form-control, .form-select {
    width: 100%;
    padding: 0.55rem 0.85rem;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--bg-surface);
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--border-color-focus);
    box-shadow: 0 0 0 3px rgba(153, 0, 0, 0.15);
}

/* Theme Switcher Widget */
.theme-select {
    padding: 0.35rem 0.75rem;
    font-size: 0.825rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--bg-surface);
    color: var(--text-primary);
    cursor: pointer;
}

/* Alerts */
.alert {
    padding: 0.85rem 1.15rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.alert-success { background-color: var(--success-light); color: var(--success); border: 1px solid var(--success); }
.alert-danger  { background-color: var(--danger-light);  color: var(--danger);  border: 1px solid var(--danger); }
.alert-warning { background-color: var(--warning-light); color: var(--warning); border: 1px solid var(--warning); }
.alert-info    { background-color: var(--info-light);    color: var(--info);    border: 1px solid var(--info); }

/* Grid Helpers */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

/* Code Snippet Box (for RouterOS Scripts) */
.script-box {
    background-color: #1e1e24;
    color: #a6e22e;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 0.825rem;
    padding: 1.25rem;
    border-radius: var(--radius-md);
    overflow-x: auto;
    white-space: pre-wrap;
    line-height: 1.6;
    border: 1px solid #333;
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
    .app-sidebar {
        transform: translateX(-100%) !important;
    }
    .app-sidebar.show {
        transform: translateX(0) !important;
    }
    .sidebar-close-btn {
        display: block;
    }
    .app-main {
        margin-left: 0 !important;
    }
    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }
}