/* White & Royal Blue Premium Theme Variables */
:root {
    --bg-color: #ffffff;
    --bg-secondary: #f4f6fc;
    --card-bg: #ffffff;
    --card-border: #e2e8f0;
    --card-border-hover: #2544E3;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --accent: #2544E3;
    --accent-hover: #1a32a8;
    --border-color: #e2e8f0;
    
    /* Semantic Status colors */
    --success-bg: #ecfdf5;
    --success-border: #a7f3d0;
    --success-text: #059669;
    
    --danger-bg: #fff5f5;
    --danger-border: #fed7d7;
    --danger-text: #e53e3e;
    
    --warning-bg: #fffbef;
    --warning-border: #fef3c7;
    --warning-text: #d97706;
    
    --info-bg: #eff6ff;
    --info-border: #bfdbfe;
    --info-text: #2563eb;

    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* Reset & Base Elements */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-family: var(--font-family);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
    letter-spacing: -0.01em;
}

/* Header & Nav */
header {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.03em;
    text-transform: uppercase;
}

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

.nav-links a, .nav-links span {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.15s ease;
}

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

.btn-logout {
    border: 1px solid var(--border-color) !important;
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    font-size: 0.85rem !important;
    transition: all 0.15s ease !important;
}

.btn-logout:hover {
    background-color: var(--accent);
    color: #ffffff !important;
    border-color: var(--accent) !important;
}

/* Main Layout */
main {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 2.5rem auto;
    padding: 0 2rem;
}

/* Cards */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card:hover {
    border-color: var(--card-border-hover);
    box-shadow: 0 10px 15px -3px rgba(37, 68, 227, 0.05), 0 4px 6px -2px rgba(37, 68, 227, 0.02);
}

/* Page headers */
.admin-header-section {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

/* Forms */
.form-container {
    max-width: 420px;
    margin: 4rem auto;
}

.form-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    text-align: center;
    letter-spacing: -0.02em;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.form-input, select, textarea {
    width: 100%;
    background: var(--bg-color);
    border: 1px solid #d1d5db;
    border-radius: 6px;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 0.9rem;
    transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 2px rgba(0,0,0,0.01);
}

/* Custom SVG Dropdown Icon for selects */
select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23111111' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.1rem;
    padding-right: 2.5rem;
}

.form-input:hover, select:hover, textarea:hover {
    border-color: #888888;
}

.form-input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 68, 227, 0.12);
}

/* Placeholder styling */
.form-input::placeholder, textarea::placeholder {
    color: #a3a3a3;
    font-size: 0.85rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 0.75rem 1.25rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: var(--font-family);
    gap: 0.5rem;
    border: 1px solid transparent;
    text-decoration: none;
}

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

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

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

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

.btn-success {
    background-color: var(--accent);
    color: #ffffff;
}

.btn-success:hover {
    background-color: var(--accent-hover);
}

.btn-danger {
    background-color: #ffffff;
    color: #b91c1c;
    border: 1px solid #fecaca;
}

.btn-danger:hover {
    background-color: #fef2f2;
    border-color: #b91c1c;
}

.btn-export {
    width: auto;
    background-color: #ffffff;
    color: var(--accent);
    border: 1px solid var(--accent);
}

.btn-export:hover {
    background-color: var(--accent);
    color: #ffffff;
    border-color: var(--accent);
}

/* Tables */
.table-container {
    overflow-x: auto;
    margin-top: 1rem;
}

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

th {
    padding: 1rem;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 0.9rem;
}

tr:hover td {
    background: #fbfbfb;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.badge-success {
    background-color: var(--success-bg);
    color: var(--success-text);
    border: 1px solid var(--success-border);
}

.badge-danger {
    background-color: var(--danger-bg);
    color: var(--danger-text);
    border: 1px solid var(--danger-border);
}

.badge-warning {
    background-color: var(--warning-bg);
    color: var(--warning-text);
    border: 1px solid var(--warning-border);
}

.badge-info {
    background-color: var(--info-bg);
    color: var(--info-text);
    border: 1px solid var(--info-border);
}

/* Custom Alert / Toast styling */
.alert-container {
    margin-bottom: 1.5rem;
}

.custom-alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 0.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    border: 1px solid transparent;
}

.custom-alert-success {
    background-color: var(--success-bg);
    border-color: var(--success-border);
    color: var(--success-text);
}

.custom-alert-danger {
    background-color: var(--danger-bg);
    border-color: var(--danger-border);
    color: var(--danger-text);
}

.custom-alert-warning {
    background-color: var(--warning-bg);
    border-color: var(--warning-border);
    color: var(--warning-text);
}

.custom-alert-close {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    font-size: 1.1rem;
}

/* Tab Layout for Admin section */
.tabs-navigation {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
    gap: 1.5rem;
}

.tab-link {
    padding: 0.75rem 0.25rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    background: none;
    border: none;
    outline: none;
}

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

.tab-link.active {
    color: var(--text-primary);
    border-bottom-color: var(--accent);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: tabFade 0.2s ease;
}

@keyframes tabFade {
    from { opacity: 0; transform: translateY(4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* User Dashboard grid styling */
.dashboard-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media(min-width: 992px) {
    .dashboard-layout {
        grid-template-columns: 1fr 2fr;
    }
}

.check-in-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 3rem 2rem;
}

.live-time {
    font-size: 2.75rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    margin-bottom: 0.5rem;
}

.live-date {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Modals styling (Custom popup alternative to window.alert) */
.custom-modal-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0,0,0,0.4);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.custom-modal {
    background: var(--bg-color);
    border: 1px solid var(--text-primary);
    border-radius: 8px;
    width: 90%;
    max-width: 450px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    animation: modalSlide 0.2s ease;
}

@keyframes modalSlide {
    from { transform: translateY(10px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.modal-body {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    line-height: 1.5;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Simple text utilities */
.text-link {
    color: var(--text-primary);
    text-decoration: underline;
    font-weight: 600;
}

.text-link:hover {
    color: #444444;
}

.list-stack {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

/* Toast Container (React-style notification popups) */
#toast-container {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 12px;
    pointer-events: none;
    max-width: 380px;
    width: 100%;
}

.toast {
    background: #ffffff;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 1rem 1.25rem;
    border-radius: 8px;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    pointer-events: auto;
    animation: toastSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    transition: all 0.2s ease;
}

@keyframes toastSlideIn {
    from {
        transform: translateX(120%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast-fade-out {
    opacity: 0;
    transform: translateX(120%);
}

.toast-content {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.toast-close {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: #666666;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-close:hover {
    color: #000000;
}

/* Toast semantic type borders/indicators to match theme */
.toast-success {
    border-left: 4px solid #15803d;
}

.toast-danger {
    border-left: 4px solid #b91c1c;
}

.toast-warning {
    border-left: 4px solid #b45309;
}