/* Marine Demand Research Dashboard */

:root {
    --color-navy: #1a2332;
    --color-navy-light: #243044;
    --color-blue: #2563eb;
    --color-blue-light: #3b82f6;
    --color-blue-dark: #1d4ed8;
    --color-teal: #0d9488;
    --color-green: #059669;
    --color-orange: #d97706;
    --color-red: #dc2626;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    --sidebar-width: 240px;
    --header-height: 56px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--color-gray-100);
    color: var(--color-gray-800);
    line-height: 1.5;
}

/* ── Login ────────────────────────────────────────────────────────────────── */

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-navy) 0%, #1e3a5f 50%, var(--color-teal) 100%);
}

.login-card {
    background: white;
    border-radius: 12px;
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}

.login-card h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-navy);
    margin-bottom: 0.25rem;
}

.login-card p {
    color: var(--color-gray-500);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-gray-600);
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input {
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--color-gray-300);
    border-radius: 6px;
    font-size: 0.9rem;
    transition: border-color 0.15s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-blue);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
}

.btn-primary {
    background: var(--color-blue);
    color: white;
    width: 100%;
}

.btn-primary:hover { background: var(--color-blue-dark); }

.login-error {
    background: #fef2f2;
    color: var(--color-red);
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

/* ── Layout ───────────────────────────────────────────────────────────────── */

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

.sidebar {
    width: var(--sidebar-width);
    background: var(--color-navy);
    color: white;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 30;
    display: flex;
    flex-direction: column;
    transition: transform 0.2s;
}

.sidebar-brand {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-brand h2 {
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.sidebar-brand span {
    font-size: 0.7rem;
    color: var(--color-gray-400);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sidebar-nav {
    flex: 1;
    padding: 0.75rem 0;
    overflow-y: auto;
}

.nav-section {
    padding: 0 0.75rem;
    margin-bottom: 0.5rem;
}

.nav-section-title {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-gray-400);
    padding: 0.5rem 0.5rem 0.25rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--color-gray-300);
    cursor: pointer;
    transition: all 0.15s;
    text-decoration: none;
}

.nav-item:hover {
    background: rgba(255,255,255,0.06);
    color: white;
}

.nav-item.active {
    background: rgba(37, 99, 235, 0.2);
    color: white;
}

.nav-item svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
}

.header {
    height: var(--header-height);
    background: white;
    border-bottom: 1px solid var(--color-gray-200);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    position: sticky;
    top: 0;
    z-index: 20;
}

.header-title {
    font-size: 1rem;
    font-weight: 600;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.btn-ghost {
    background: none;
    color: var(--color-gray-500);
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
}

.btn-ghost:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
}

.page-content {
    padding: 1.5rem;
}

/* ── KPI Cards ────────────────────────────────────────────────────────────── */

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.kpi-card {
    background: white;
    border-radius: 8px;
    padding: 1.25rem;
    border: 1px solid var(--color-gray-200);
}

.kpi-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-500);
    margin-bottom: 0.375rem;
}

.kpi-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-gray-900);
    line-height: 1.2;
}

.kpi-sub {
    font-size: 0.75rem;
    color: var(--color-gray-400);
    margin-top: 0.25rem;
}

.kpi-change-up { color: var(--color-green); }
.kpi-change-down { color: var(--color-red); }

/* ── Cards & Charts ───────────────────────────────────────────────────────── */

.card {
    background: white;
    border-radius: 8px;
    border: 1px solid var(--color-gray-200);
    margin-bottom: 1.5rem;
}

.card-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-gray-100);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 0.9rem;
    font-weight: 600;
}

.card-body {
    padding: 1.25rem;
}

.chart-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.chart-container {
    position: relative;
    height: 280px;
}

/* ── Tables ───────────────────────────────────────────────────────────────── */

.table-wrapper {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

thead th {
    text-align: left;
    padding: 0.625rem 0.75rem;
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-500);
    border-bottom: 1px solid var(--color-gray-200);
    white-space: nowrap;
}

tbody td {
    padding: 0.625rem 0.75rem;
    border-bottom: 1px solid var(--color-gray-100);
    color: var(--color-gray-700);
}

tbody tr:hover {
    background: var(--color-gray-50);
}

.td-value {
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.td-link {
    color: var(--color-blue);
    text-decoration: none;
    cursor: pointer;
}

.td-link:hover { text-decoration: underline; }

/* ── Filters ──────────────────────────────────────────────────────────────── */

.filters-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.filter-input {
    padding: 0.375rem 0.625rem;
    border: 1px solid var(--color-gray-300);
    border-radius: 6px;
    font-size: 0.8rem;
    min-width: 140px;
}

.filter-input:focus {
    outline: none;
    border-color: var(--color-blue);
}

/* ── Pagination ───────────────────────────────────────────────────────────── */

.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 0;
    font-size: 0.8rem;
    color: var(--color-gray-500);
}

.pagination-btns {
    display: flex;
    gap: 0.25rem;
}

.pagination-btns button {
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--color-gray-300);
    background: white;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
}

.pagination-btns button:hover { background: var(--color-gray-50); }
.pagination-btns button:disabled { opacity: 0.4; cursor: default; }

/* ── Badges ───────────────────────────────────────────────────────────────── */

.badge {
    display: inline-block;
    padding: 0.125rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-green { background: #d1fae5; color: #065f46; }
.badge-orange { background: #fef3c7; color: #92400e; }
.badge-red { background: #fee2e2; color: #991b1b; }
.badge-blue { background: #dbeafe; color: #1e40af; }

/* ── Empty State ──────────────────────────────────────────────────────────── */

.empty-state {
    padding: 2.5rem 1rem;
    text-align: center;
    color: var(--color-gray-400);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* ── Loading ──────────────────────────────────────────────────────────────── */

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    color: var(--color-gray-400);
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-gray-200);
    border-top-color: var(--color-blue);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-right: 0.75rem;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Responsive ───────────────────────────────────────────────────────────── */

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-gray-600);
    cursor: pointer;
    padding: 0.25rem;
}

@media (max-width: 768px) {
    .mobile-toggle { display: block; }
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .chart-grid { grid-template-columns: 1fr; }
    .kpi-grid { grid-template-columns: repeat(2, 1fr); }
}