/* ==========================================================================
   1. System & Root Variables (Dark- & Lightmode)
   ========================================================================== */
:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --accent: #38bdf8;
    --accent-hover: #0284c7;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
    --error: #ef4444;
    --success: #22c55e;
    --warning: #f59e0b;
    --focus-ring: rgba(56, 189, 248, 0.35);
}

[data-theme="light"] {
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --accent: #0284c7;
    --accent-hover: #0369a1;
    --text: #0f172a;
    --text-muted: #64748b;
    --border: #cbd5e1;
    --error: #dc2626;
    --success: #16a34a;
    --warning: #d97706;
    --focus-ring: rgba(2, 132, 199, 0.35);
}

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

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-color);
    color: var(--text);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

main {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 1rem;
}

/* ==========================================================================
   2. Header & Navigation
   ========================================================================== */
header, .main-header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 1.5rem;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.brand-logo, .logo {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--text);
    text-decoration: none;
    transition: color 0.2s ease, transform 0.2s ease;
}

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

.brand-logo:hover, .logo:hover {
    transform: scale(1.02);
}

nav, .admin-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

nav a, .nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.5rem 0.85rem;
    border-radius: 6px;
    transition: color 0.2s ease, background-color 0.2s ease;
}

nav a:hover, .nav-link:hover {
    color: var(--text);
    background-color: rgba(128, 128, 128, 0.1);
}

.nav-link.active {
    color: #ffffff;
    background-color: var(--accent);
    font-weight: 600;
}

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

.user-badge {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.btn-secondary-sm, .btn-logout-sm {
    font-size: 0.8rem;
    padding: 0.4rem 0.75rem;
    border-radius: 6px;
    text-decoration: none;
    transition: background-color 0.2s ease;
}

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

.btn-secondary-sm:hover {
    background-color: rgba(128, 128, 128, 0.1);
}

.btn-logout-sm {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

.btn-logout-sm:hover {
    background-color: rgba(239, 68, 68, 0.2);
}

/* ==========================================================================
   3. Auth Cards, Dashboard & Layout Containers
   ========================================================================== */
.auth-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem;
    width: 100%;
    max-width: 400px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease;
    animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.auth-card:hover {
    border-color: rgba(56, 189, 248, 0.3);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.15);
}

.auth-card.wide {
    max-width: 900px;
    text-align: left;
}

.auth-card h2, .auth-card h3 {
    margin-bottom: 1.25rem;
}

.auth-card h2 {
    text-align: center;
}

.dashboard-container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

.dashboard-banner {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
}

.dashboard-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1.5rem;
    transition: border-color 0.2s ease, transform 0.2s ease, background-color 0.3s ease;
}

.dashboard-card:hover {
    border-color: rgba(56, 189, 248, 0.25);
    transform: translateY(-2px);
}

/* ==========================================================================
   4. Tables & Data Grids
   ========================================================================== */
table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

th {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-muted);
    font-weight: 600;
}

td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

tr:last-child td {
    border-bottom: none;
}

tbody tr:hover {
    background-color: rgba(128, 128, 128, 0.05);
}

/* ==========================================================================
   5. Forms & Inputs
   ========================================================================== */
.form-group {
    margin-bottom: 1.25rem;
}

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

.form-group input, .form-group select {
    width: 100%;
    padding: 0.75rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    background-color: var(--bg-color);
    color: var(--text);
    font-size: 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.form-group input:hover, .form-group select:hover {
    border-color: var(--text-muted);
}

.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--focus-ring);
}

/* ==========================================================================
   6. Buttons & Links
   ========================================================================== */
.btn {
    display: inline-block;
    width: 100%;
    padding: 0.75rem;
    border: none;
    border-radius: 6px;
    background-color: var(--accent);
    color: #0f172a;
    font-weight: bold;
    font-size: 1rem;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    transition: background-color 0.2s ease, transform 0.1s ease, box-shadow 0.2s ease;
}

.btn:hover {
    background-color: var(--accent-hover);
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.25);
}

.btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--focus-ring);
}

.btn:active {
    transform: translateY(1px);
    box-shadow: none;
}

.btn-submit {
    margin-top: 1rem;
}

/* ==========================================================================
   7. Alerts, Notifications & Toast
   ========================================================================== */
.alert {
    padding: 0.75rem 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    animation: slideDown 0.35s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.alert-error {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    color: var(--error);
}

.alert-success {
    background-color: rgba(34, 197, 94, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert-info {
    background-color: rgba(56, 189, 248, 0.1);
    border: 1px solid var(--accent);
    color: var(--accent);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--warning);
    color: var(--warning);
}

/* Toast Popup Notifications */
.toast-popup {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 9999;
    min-width: 280px;
    max-width: 380px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    color: var(--text);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
    animation: slideInRight 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    transition: opacity 0.4s ease, transform 0.4s ease;
    padding: 1rem;
    border-radius: 8px;
}

.toast-popup.hide {
    opacity: 0;
    transform: translateY(-20px);
}

.toast-close {
    background: none;
    border: none;
    color: inherit;
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    opacity: 0.7;
    padding: 0 0.2rem;
    transition: opacity 0.2s ease;
}

.toast-close:hover {
    opacity: 1;
}

/* ==========================================================================
   8. Password Strength & Requirements
   ========================================================================== */
.strength-meter-container {
    margin-top: 0.5rem;
}

.strength-meter-bar {
    height: 6px;
    width: 0%;
    background-color: var(--border);
    border-radius: 3px;
    transition: width 0.3s ease, background-color 0.3s ease;
}

.strength-text {
    font-size: 0.8rem;
    margin-top: 0.25rem;
    color: var(--text-muted);
}

.requirements-list {
    list-style: none;
    padding: 0;
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.requirements-list li {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    transition: color 0.2s ease;
}

.requirements-list li.valid {
    color: var(--success);
}

/* ==========================================================================
   9. Keyframe Animations
   ========================================================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulseError {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.4);
    }
    50% {
        box-shadow: 0 0 0 6px rgba(239, 68, 68, 0);
    }
}

.input-error {
    border-color: var(--error) !important;
    animation: pulseError 0.6s ease-out 2;
}

/* ==========================================================================
   10. Responsive Styles & Mobile Adjustments
   ========================================================================== */
@media (max-width: 640px) {
    header, .main-header {
        padding: 0.75rem 1rem;
    }

    .header-container {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    main {
        padding: 1.25rem 0.75rem;
    }

    .auth-card {
        padding: 1.5rem;
    }

    .dashboard-banner {
        padding: 1.25rem;
        margin-bottom: 1.25rem;
    }

    .dashboard-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .toast-popup {
        top: 70px;
        right: 10px;
        left: 10px;
        max-width: none;
    }
}

/* ==========================================================================
   11. Third-party Widgets & Footer
   ========================================================================== */
.cf-turnstile {
    margin-bottom: 1.25rem;
}

footer, .main-footer {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border);
    padding: 1.25rem 1.5rem;
    margin-top: auto;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.footer-container, .footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-links, .footer-nav {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-links a, .footer-nav a {
    color: var(--text-muted);
    text-decoration: none;
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    transition: color 0.2s ease, background-color 0.2s ease;
}

.footer-links a:hover, .footer-nav a:hover {
    color: var(--text);
    background-color: rgba(128, 128, 128, 0.1);
}

.footer-links .separator {
    color: var(--border);
}