/* ============================================
   Enterprise Task Manager - OpusFlow Inspired
   Navy + Coffee/Gold Theme
   ============================================ */
:root {
    --navy: #0b2b44;
    --navy-dark: #0a253a;
    --coffee: #c2a575;
    --coffee-light: #d9bc8c;
    --coffee-dark: #a68454;
    --danger: #ef4444;
    --danger-bg: #fee2e2;
    --danger-text: #b91c1c;
    --success-bg: #dcfce7;
    --success-text: #166534;
    --warning-bg: #fef3c7;
    --warning-text: #92400e;
    --border-light: #e2e8f0;
    --bg-body: #eef2f5;
    --bg-card: #ffffff;
    --bg-input: #ffffff;
    --bg-sidebar: #0b2b44;
    --bg-sidebar-hover: #2c5575;
    --text-primary: #1a2a3f;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --text-sidebar: #cbd5e6;
    --text-sidebar-active: #d9bc8c;
    --shadow-sm: 0 2px 12px rgba(0,0,0,0.05);
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
    --radius: 24px;
    --radius-sm: 20px;
    --radius-lg: 32px;
    --radius-btn: 40px;
    --transition: 0.2s ease;
    --font: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    --sidebar-width: 260px;
    --topbar-height: 64px;
}

/* ========== RESET & BASE ========== */
* { margin:0; padding:0; box-sizing:border-box; }
html { font-size:14px; }
body {
    font-family: var(--font);
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}
a { color: var(--coffee-dark); text-decoration: none; }
a:hover { color: var(--navy); text-decoration: none; }
h1,h2,h3,h4 { color: var(--text-primary); font-weight: 700; margin-bottom: 0.5rem; }
h1 { font-size: 1.6rem; } h2 { font-size: 1.35rem; } h3 { font-size: 1.15rem; }
.text-muted { color: var(--text-muted) !important; }

/* Dark Theme (applied to html.dark or .dark class on body) */
html.dark, body.dark {
    --bg-body: #0f172a;
    --bg-card: #1e293b;
    --bg-input: #334155;
    --bg-topbar: #1e293b;
    --border-light: #334155;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --shadow-sm: 0 2px 12px rgba(0,0,0,0.3);
    --shadow: 0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
    --success-bg: #064e3b;
    --success-text: #6ee7b7;
    --danger-bg: #7f1d1d;
    --danger-text: #fca5a5;
    --warning-bg: #78350f;
    --warning-text: #fcd34d;
}
html.dark .card, body.dark .card { border-color: #334155; }
html.dark .topbar, body.dark .topbar { background: #1e293b; }
html.dark table th, body.dark table th { background: #1e293b; color: #e2e8f0; }
html.dark table td, body.dark table td { border-bottom-color: #334155; }
html.dark .form-control, body.dark .form-control { background: #334155; border-color: #475569; color: #e2e8f0; }
html.dark .btn-outline, body.dark .btn-outline { background: #334155; color: #e2e8f0; border-color: #475569; }
html.dark .topbar-search input, body.dark .topbar-search input { background: #334155; }
html.dark .user-menu, body.dark .user-menu { background: #334155; }
html.dark .dropdown-menu, body.dark .dropdown-menu { background: #1e293b; border-color: #334155; }
html.dark .dropdown-menu a:hover, body.dark .dropdown-menu a:hover { background: #334155; }

/* ========== LAYOUT ========== */
.app-wrapper { display: grid; grid-template-columns: var(--sidebar-width) 1fr; min-height: 100vh; }

/* Sidebar */
.sidebar {
    background: linear-gradient(180deg, var(--navy) 0%, var(--navy-dark) 100%);
    color: var(--text-sidebar);
    position: sticky; top:0; height: 100vh;
    overflow-y: auto; transition: var(--transition);
}
.sidebar-header { padding: 24px 20px; border-bottom: 1px solid #2c4c6e; }
.sidebar-brand {
    display: flex; align-items: center; gap: 12px;
    color: #fff; font-size: 1.4rem; font-weight: 700; text-decoration: none;
}
.sidebar-brand i { color: var(--coffee); font-size: 1.5rem; }
.sidebar-nav { padding: 12px 0; }
.sidebar-nav ul { list-style: none; }
.sidebar-nav li a {
    display: flex; align-items: center; gap: 14px;
    padding: 10px 20px; margin: 4px 12px; border-radius: 14px;
    cursor: pointer; transition: var(--transition);
    color: var(--text-sidebar); font-weight: 500; text-decoration: none;
}
.sidebar-nav li a i { width: 26px; }
.sidebar-nav li a:hover { background: var(--bg-sidebar-hover); color: #fff; text-decoration: none; }
.sidebar-nav li.active a,
.sidebar-nav li a.active-nav {
    background: rgba(194,165,117,0.2);
    color: var(--coffee-light);
    border-left: 3px solid var(--coffee);
}
.sidebar-divider {
    padding: 16px 20px 4px; font-size: 0.7rem; text-transform: uppercase;
    color: var(--coffee); letter-spacing: 1.5px; font-weight: 700;
}

/* Main Content */
.main-content { min-height: 100vh; position: relative; z-index: 1; }

/* Topbar */
.topbar {
    background: var(--bg-card); border-radius: var(--radius);
    padding: 12px 24px; display: flex; justify-content: space-between; align-items: center;
    margin: 16px 24px 24px; box-shadow: var(--shadow-sm); overflow: visible;
}
.sidebar-toggle { background: #f1f5f9; border: none; width: 40px; height: 40px; border-radius: 50%; cursor: pointer; display: none; align-items: center; justify-content: center; color: var(--navy); font-size: 1.2rem; }
.topbar-search { flex: 1; max-width: 400px; position: relative; margin-left: 16px; }
.topbar-search i { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--text-muted); }
.topbar-search input {
    width: 100%; padding: 10px 14px 10px 38px;
    border: 1px solid var(--border-light); border-radius: var(--radius-btn);
    background: var(--bg-input); color: var(--text-primary); font-size: 0.85rem;
}
.topbar-actions { display: flex; align-items: center; gap: 8px; position: relative; }

.btn-icon {
    background: #f1f5f9; border: none; width: 40px; height: 40px;
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    cursor: pointer; color: var(--navy); transition: var(--transition); font-size: 1.1rem;
}
.btn-icon:hover { background: #e2e8f0; }
.user-menu {
    display: flex; align-items: center; gap: 10px; background: #f8fafc;
    padding: 6px 20px; border-radius: var(--radius-btn);
    cursor: pointer; border: 1px solid var(--border-light); font-weight: 500;
}
.user-avatar {
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--coffee); color: var(--navy);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.8rem;
}
.dropdown-menu {
    position: absolute; top: calc(100% + 8px); right: 0;
    background: var(--bg-card); border: 1px solid var(--border-light);
    border-radius: var(--radius); box-shadow: var(--shadow);
    min-width: 220px; z-index: 200; overflow: hidden;
}
.dropdown-menu a, .dropdown-header {
    display: block; padding: 10px 18px; color: var(--text-primary); font-size: 0.85rem; text-decoration: none;
}
.dropdown-menu a:hover { background: #f8fafc; text-decoration: none; }
.dropdown-header { font-weight: 700; border-bottom: 1px solid var(--border-light); color: var(--navy); }

/* Page Content */
.page-content { padding: 0 24px 24px; }

/* ========== CARDS ========== */
.card {
    background: var(--bg-card); border-radius: var(--radius);
    padding: 24px; margin-bottom: 24px;
    border: 1px solid var(--border-light); box-shadow: var(--shadow-sm);
}
.card-header {
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 12px; margin-bottom: 16px;
}
.card-body { /* card already has padding */ }

/* ========== KPI / STAT CARDS ========== */
.stats-row, .kpi-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 16px; margin-bottom: 24px;
}
.stat-card, .kpi-card {
    background: var(--bg-card); border-radius: var(--radius);
    padding: 20px; text-align: center;
    border: 1px solid var(--border-light);
}
.stat-card h2, .kpi-card h2 { font-size: 2rem; color: var(--navy); margin: 0; }
.stat-card p, .kpi-card p { color: var(--text-secondary); font-size: 0.8rem; margin-top: 4px; }
.stat-icon {
    width: 48px; height: 48px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.25rem; margin: 0 auto 8px;
}
.stat-icon.primary { background: rgba(194,165,117,0.2); color: var(--coffee-dark); }
.stat-icon.success { background: var(--success-bg); color: var(--success-text); }
.stat-icon.warning { background: var(--warning-bg); color: var(--warning-text); }
.stat-icon.danger { background: var(--danger-bg); color: var(--danger-text); }
.stat-icon.info { background: #dbeafe; color: #1e40af; }
.progress-bar { height: 8px; background: #e2e8f0; border-radius: 10px; margin-top: 12px; }
.progress-fill { background: var(--coffee); height: 100%; border-radius: 10px; }

/* ========== FORMS ========== */
.form-group { margin-bottom: 16px; }
.form-group label { font-weight: 600; display: block; margin-bottom: 6px; font-size: 0.8rem; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; }
.form-control, select.form-control, textarea.form-control {
    width: 100%; padding: 10px 14px;
    border: 1px solid var(--border-light); border-radius: var(--radius-sm);
    background: var(--bg-input); color: var(--text-primary);
    font-size: 0.85rem; transition: var(--transition); font-family: var(--font);
}
.form-control:focus { outline: none; border-color: var(--coffee); box-shadow: 0 0 0 3px rgba(194,165,117,0.15); }
textarea.form-control { min-height: 100px; resize: vertical; }
.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; }
.form-check { display: flex; align-items: center; gap: 8px; }
.form-check input[type="checkbox"] { width: auto; }

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 8px 20px; border-radius: var(--radius-btn); border: none;
    font-weight: 600; font-size: 0.8rem; cursor: pointer;
    transition: var(--transition); text-decoration: none;
    white-space: nowrap;
}
.btn:hover { text-decoration: none; opacity: 0.9; }
.btn-primary { background: var(--coffee); color: var(--navy); }
.btn-primary:hover { background: var(--coffee-dark); color: #fff; }
.btn-success { background: var(--success-bg); color: var(--success-text); }
.btn-warning { background: var(--warning-bg); color: var(--warning-text); }
.btn-danger { background: var(--danger-bg); color: var(--danger-text); }
.btn-info { background: #dbeafe; color: #1e40af; }
.btn-secondary, .btn-outline { background: #eef2f5; color: var(--navy); border: 1px solid #cbd5e1; }
.btn-secondary:hover, .btn-outline:hover { background: #e2e8f0; }
.btn-sm { padding: 6px 14px; font-size: 0.75rem; }
.btn-lg { padding: 12px 28px; font-size: 0.9rem; }
.btn-block { display: block; width: 100%; text-align: center; }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ========== TABLES ========== */
.table-responsive { overflow-x: auto; border-radius: var(--radius-sm); }
table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
table th, table td { padding: 14px 12px; text-align: left; border-bottom: 1px solid #eef2f6; }
table th { background: #fafcff; font-weight: 700; color: var(--navy); white-space: nowrap; }
table tbody tr:hover { background: #f8fafc; }
table a { color: var(--navy); font-weight: 500; }
.actions { white-space: nowrap; display: flex; gap: 6px; flex-wrap: wrap; }

/* ========== BADGES ========== */
.badge {
    display: inline-block; padding: 4px 12px; border-radius: var(--radius-btn);
    font-size: 0.7rem; font-weight: 600;
}
.badge-primary { background: rgba(194,165,117,0.2); color: var(--coffee-dark); }
.badge-success, .badge-active { background: var(--success-bg); color: var(--success-text); }
.badge-danger, .badge-disabled { background: var(--danger-bg); color: var(--danger-text); }
.badge-warning { background: var(--warning-bg); color: var(--warning-text); }
.badge-info { background: #dbeafe; color: #1e40af; }
.badge-secondary, .badge-light { background: #f1f5f9; color: #475569; }
.badge-dark { background: var(--navy); color: #fff; }

/* ========== ALERTS ========== */
.alert {
    padding: 12px 20px; border-radius: var(--radius-sm);
    margin-bottom: 16px; font-size: 0.85rem; display: flex;
    align-items: center; justify-content: space-between;
}
.alert-success { background: var(--success-bg); color: var(--success-text); }
.alert-error, .alert-danger { background: var(--danger-bg); color: var(--danger-text); }
.alert-warning { background: var(--warning-bg); color: var(--warning-text); }
.alert-info { background: #dbeafe; color: #1e40af; }
.alert-close { background: none; border: none; font-size: 1.2rem; cursor: pointer; color: inherit; }

/* ========== AUTH PAGES ========== */
.auth-page {
    background: linear-gradient(135deg, var(--navy) 0%, var(--navy-dark) 100%);
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    padding: 16px;
}
.auth-container { width: 100%; max-width: 420px; }
.auth-card {
    background: var(--bg-card); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg); overflow: hidden;
}
.auth-header { text-align: center; padding: 40px 24px 16px; }
.auth-logo { font-size: 3rem; color: var(--coffee); }
.auth-header h2 { margin: 8px 0 0; color: var(--navy); }
.auth-body { padding: 16px 24px 24px; }
.auth-links { text-align: center; padding: 0 24px 24px; font-size: 0.85rem; }

/* ========== PAGINATION ========== */
.pagination { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; flex-wrap: wrap; }
.pagination ul { list-style: none; display: flex; gap: 8px; }
.pagination .page-item a, .pagination .page-item span {
    background: #f1f5f9; border: none; padding: 6px 14px; border-radius: 30px;
    cursor: pointer; font-weight: 500; font-size: 0.85rem;
    color: var(--text-primary); text-decoration: none; display: block;
}
.pagination .page-item.active a { background: var(--coffee); color: #fff; }
.pagination .page-item.disabled a { opacity: 0.5; cursor: not-allowed; }

/* ========== MODAL ========== */
.modal-overlay {
    display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5);
    align-items: center; justify-content: center; z-index: 1000;
    backdrop-filter: blur(3px);
}
.modal-overlay.active { display: flex; }
.modal {
    background: var(--bg-card); border-radius: var(--radius-lg);
    max-width: 700px; width: 90%; max-height: 85vh; overflow-y: auto;
    padding: 28px; position: relative;
}
.modal-header { padding-bottom: 16px; border-bottom: 1px solid var(--border-light); display: flex; justify-content: space-between; align-items: center; }
.modal-body { padding-top: 16px; }
.modal-footer { padding-top: 16px; border-top: 1px solid var(--border-light); display: flex; justify-content: flex-end; gap: 8px; }

/* ========== KANBAN ========== */
.kanban-board { display: flex; gap: 16px; overflow-x: auto; padding-bottom: 16px; }
.kanban-column { min-width: 280px; max-width: 320px; flex-shrink: 0; }
.kanban-column .card-header { text-transform: uppercase; font-size: 0.75rem; padding: 10px 16px; }
.kanban-column .card-body { min-height: 200px; }
.kanban-card {
    background: var(--bg-card); border: 1px solid var(--border-light);
    border-radius: var(--radius-sm); padding: 14px; margin-bottom: 8px;
    cursor: pointer; box-shadow: var(--shadow-sm); transition: var(--transition);
}
.kanban-card:hover { box-shadow: var(--shadow); }

/* ========== TASK DETAIL ========== */
.task-detail-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 20px; }
.task-meta-item { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid #eef2f6; font-size: 0.85rem; }
.comment-item { padding: 12px 0; border-bottom: 1px solid #eef2f6; display: flex; gap: 12px; }
.comment-avatar {
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--coffee); color: var(--navy);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.75rem; flex-shrink: 0;
}
.comment-content { flex: 1; font-size: 0.85rem; }
.comment-meta { color: var(--text-muted); font-size: 0.75rem; margin-bottom: 4px; }

/* ========== INSTALL WIZARD ========== */
.install-wrapper { max-width: 700px; margin: 32px auto; padding: 16px; }
.install-header { text-align: center; margin-bottom: 32px; }
.install-header i { font-size: 3.5rem; color: var(--coffee); }
.install-header h1 { color: var(--navy); font-size: 1.8rem; margin-top: 8px; }
.requirement-check { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px solid #eef2f6; }
.requirement-check.pass { color: var(--success-text); }
.requirement-check.fail { color: var(--danger-text); }

/* ========== RESPONSIVE ========== */
@media (max-width: 992px) {
    .task-detail-grid { grid-template-columns: 1fr; }
    .kanban-board { flex-direction: column; align-items: center; }
    .kanban-column { max-width: 100%; width: 100%; }
}
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .sidebar-toggle { display: flex; }
    .stats-row, .kpi-grid { grid-template-columns: 1fr 1fr; }
    .page-content { padding: 0 12px 12px; }
}
@media (max-width: 480px) {
    .stats-row, .kpi-grid { grid-template-columns: 1fr; }
    .topbar { padding: 10px 14px; border-radius: var(--radius-sm); }
    .topbar-search { display: none; }
    .user-menu span { display: none; }
}