:root {
    --bg-primary: #0f172a; /* Dark slate */
    --bg-secondary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6; /* Blue ribbon */
    --accent-hover: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.4);
    --border: #334155;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    text-decoration: none;
    color: var(--accent);
    transition: color 0.3s ease;
}

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

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.nav-brand span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
}

.nav-link:hover {
    color: var(--text-primary);
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-family: 'Outfit', sans-serif;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 0.95rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #60a5fa);
    color: #fff;
    box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
    color: #fff;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-block {
    display: block;
    width: 100%;
    text-align: center;
}

.main-content {
    flex-grow: 1;
    padding: 2rem 5%;
}

/* Landing Page Styles */
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 70vh;
    animation: fadeIn 1s ease-out;
}

.hero h1 {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #fff, #94a3b8);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 2.5rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 4rem;
}

.feature-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    border-color: var(--accent);
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
}

.footer {
    text-align: center;
    padding: 2rem 5%;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    margin-top: 4rem;
}

/* Auth Cards & Forms */
.auth-container {
    max-width: 400px;
    margin: 4rem auto;
    background: var(--bg-secondary);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    animation: slideUp 0.5s ease-out;
}

.auth-container h2 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-control, .auth-container input[type="text"], .auth-container input[type="password"], .auth-container input[type="email"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-control:focus, .auth-container input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Dashboard Styles */
.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.dashboard-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    text-align: center;
}

.empty-state {
    padding: 4rem 2rem;
    text-align: center;
    background: rgba(30, 41, 59, 0.5);
    border-radius: 16px;
    border: 1px dashed var(--border);
}

.empty-state h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Alerts */
.messages {
    margin-bottom: 2rem;
}

.alert {
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-weight: 500;
}

.alert.success { background: rgba(16, 185, 129, 0.1); color: var(--success); border: 1px solid var(--success); }
.alert.error { background: rgba(239, 68, 68, 0.1); color: var(--danger); border: 1px solid var(--danger); }
.alert.warning { background: rgba(245, 158, 11, 0.1); color: var(--warning); border: 1px solid var(--warning); }

/* Tables & Badges */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 0;
}

.data-table th, .data-table td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
}

.data-table th {
    background: rgba(30, 41, 59, 0.5);
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.data-table tr:hover {
    background: rgba(30, 41, 59, 0.3);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-right: 0.5rem;
    margin-bottom: 0.25rem;
}

.badge-admin { background: rgba(239, 68, 68, 0.15); color: #fca5a5; border: 1px solid rgba(239, 68, 68, 0.3); }
.badge-collector { background: rgba(59, 130, 246, 0.15); color: #93c5fd; border: 1px solid rgba(59, 130, 246, 0.3); }
.badge-approver { background: rgba(16, 185, 129, 0.15); color: #6ee7b7; border: 1px solid rgba(16, 185, 129, 0.3); }
.badge-member { background: rgba(148, 163, 184, 0.15); color: #cbd5e1; border: 1px solid rgba(148, 163, 184, 0.3); }

/* =========================================
   LANDING PAGE — WHITE THEME OVERRIDES
   ========================================= */
body.landing-page {
    background: #f8fafc !important;
    color: #1e293b;
}

body.landing-page .main-content {
    padding: 0;
}

body.landing-page .navbar {
    background: rgba(255,255,255,0.95) !important;
    border-bottom: 1px solid #e2e8f0;
}

body.landing-page .nav-brand a { color: #1e293b; }
body.landing-page .nav-link { color: #64748b; }
body.landing-page .nav-link:hover { color: #3b82f6; }

body.landing-page .footer {
    background: #1e293b;
    color: #94a3b8;
    border-top: none;
    margin-top: 0;
}

/* =========================================
   GLOBAL RESPONSIVE — ALL PAGES
   ========================================= */

/* ── Tablet (≤900px) ── */
@media (max-width: 900px) {
    .navbar {
        padding: 1rem 4%;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    .nav-links {
        gap: 0.75rem;
        flex-wrap: wrap;
    }
    .page-container,
    .container {
        padding: 1.5rem;
    }
    /* Table horizontal scroll on tablet */
    .table-responsive {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* ── Mobile (≤640px) ── */
@media (max-width: 640px) {
    .navbar {
        padding: 0.85rem 4%;
    }
    .nav-links {
        gap: 0.5rem;
    }
    .nav-links .btn {
        padding: 0.5rem 0.9rem;
        font-size: 0.8rem;
    }
    .nav-brand a {
        font-size: 1.2rem;
    }

    /* Cards / panels */
    .card, .panel, .box {
        padding: 1.25rem;
        border-radius: 10px;
    }

    /* Buttons full-width on mobile forms */
    .btn-block-mobile {
        display: block;
        width: 100%;
        text-align: center;
    }

    /* Tables scroll on mobile */
    table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        white-space: nowrap;
    }

    /* Form layout */
    .form-row {
        flex-direction: column;
    }
    .form-group {
        width: 100%;
    }

    /* Dashboard content */
    .main-content {
        padding: 1rem;
    }

    /* Footer */
    .footer {
        padding: 1.5rem 1rem;
        text-align: center;
    }
    .footer div[style*="justify-content:center"] {
        justify-content: center !important;
    }
}