/* ============== CSS Variables & Reset ============== */
:root {
    --color-bg: #0f0f0f;
    --color-bg-elevated: #1a1a1a;
    --color-bg-card: #242424;
    --color-bg-hover: #2d2d2d;
    --color-primary: #e8d5b7;
    --color-primary-dim: #c4b39a;
    --color-accent: #f4a261;
    --color-accent-bright: #ffb347;
    --color-success: #7ec8a3;
    --color-warning: #f4a261;
    --color-danger: #e76f51;
    --color-text: #ffffff;
    --color-text-secondary: #a0a0a0;
    --color-text-muted: #666666;
    --color-border: #333333;
    --color-border-light: #444444;
    
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(232, 213, 183, 0.15);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    line-height: 1.6;
    background-image: 
        radial-gradient(ellipse at 20% 20%, rgba(232, 213, 183, 0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(244, 162, 97, 0.03) 0%, transparent 50%);
}

/* ============== Navigation ============== */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(15, 15, 15, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    z-index: 1000;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand-icon {
    font-size: 1.5rem;
    color: var(--color-primary);
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.8; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

.brand-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-primary);
    letter-spacing: 0.5px;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

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

.nav-link.active {
    color: var(--color-primary);
    background: rgba(232, 213, 183, 0.1);
}

.nav-icon {
    font-size: 1.1rem;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-name {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.logout-btn {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-decoration: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.logout-btn:hover {
    color: var(--color-danger);
    border-color: var(--color-danger);
}

.admin-badge {
    padding: 0.25rem 0.5rem;
    font-size: 0.7rem;
    font-weight: 600;
    background: rgba(244, 162, 97, 0.2);
    color: var(--color-accent);
    border-radius: var(--radius-sm);
    text-transform: uppercase;
}

/* Ticket ID Display */
.ticket-id-display {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.875rem 1rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
}

.ticket-id-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    font-family: monospace;
}

.ticket-id-value.empty {
    color: var(--color-text-muted);
    font-weight: 400;
}

.ticket-id-status {
    font-size: 0.8rem;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
}

.ticket-id-status.success {
    background: rgba(126, 200, 163, 0.2);
    color: var(--color-success);
}

.ticket-id-status.pending {
    background: rgba(244, 162, 97, 0.1);
    color: var(--color-text-muted);
}

.btn-reset-ticket {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-reset-ticket:hover {
    border-color: var(--color-danger);
    color: var(--color-danger);
}

/* No Ticket Message */
.no-ticket-message {
    text-align: center;
    padding: 3rem 2rem;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
}

.no-ticket-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.7;
}

.no-ticket-message h2 {
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.no-ticket-message p {
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.schedule-grid.empty-schedule {
    opacity: 0.3;
    pointer-events: none;
}

/* Flash Messages */
.flash-messages {
    margin-bottom: 1.5rem;
}

.flash-message {
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.flash-message.success {
    background: rgba(126, 200, 163, 0.15);
    border: 1px solid rgba(126, 200, 163, 0.3);
    color: var(--color-success);
}

.flash-message.error {
    background: rgba(231, 111, 81, 0.15);
    border: 1px solid rgba(231, 111, 81, 0.3);
    color: var(--color-danger);
}

.flash-message.info {
    background: rgba(232, 213, 183, 0.15);
    border: 1px solid rgba(232, 213, 183, 0.3);
    color: var(--color-primary);
}

/* ============== Main Content ============== */
.main-content {
    padding-top: 70px;
    min-height: 100vh;
}

/* ============== Login Page ============== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background-image: 
        radial-gradient(ellipse at 30% 30%, rgba(232, 213, 183, 0.08) 0%, transparent 40%),
        radial-gradient(ellipse at 70% 70%, rgba(244, 162, 97, 0.05) 0%, transparent 40%);
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 3rem 2.5rem;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    animation: fadeInUp 0.6s ease-out;
}

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

.login-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.login-logo {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: float 4s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.login-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    letter-spacing: 1px;
}

.login-subtitle {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.google-login-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    width: 100%;
    padding: 1rem 1.5rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.google-login-btn:hover {
    background: var(--color-bg-hover);
    border-color: var(--color-primary-dim);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.google-icon {
    width: 24px;
    height: 24px;
}

.login-footer {
    margin-top: 2rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* ============== Profile Page ============== */
.profile-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

.page-header {
    margin-bottom: 2rem;
}

.page-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.page-subtitle {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}

.profile-form {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
}

.form-section {
    margin-bottom: 2rem;
}

.form-section:last-child {
    margin-bottom: 0;
}

.section-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-primary-dim);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
}

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

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.form-label .optional {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-weight: 400;
}

.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 1rem;
    font-family: var(--font-body);
    transition: all 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary-dim);
    box-shadow: 0 0 0 3px rgba(232, 213, 183, 0.1);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-select {
    width: 100%;
    padding: 0.875rem 1rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 1rem;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all 0.3s ease;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23666666' 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 0.75rem center;
    background-size: 1.25rem;
    padding-right: 2.5rem;
}

.form-select:focus {
    outline: none;
    border-color: var(--color-primary-dim);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    font-family: var(--font-body);
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dim) 100%);
    color: var(--color-bg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), 0 0 20px rgba(232, 213, 183, 0.3);
}

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

.btn-secondary:hover {
    background: var(--color-bg-hover);
    border-color: var(--color-border-light);
}

.btn-full {
    width: 100%;
}

/* ============== Schedule Page ============== */
.schedule-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

.week-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.week-info {
    display: flex;
    align-items: baseline;
    gap: 1rem;
}

.week-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--color-primary);
}

.week-dates {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.waiting-count {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(244, 162, 97, 0.15);
    border: 1px solid rgba(244, 162, 97, 0.3);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    color: var(--color-accent);
}

.schedule-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 1rem;
}

.day-column {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out backwards;
}

.day-column:nth-child(1) { animation-delay: 0.05s; }
.day-column:nth-child(2) { animation-delay: 0.1s; }
.day-column:nth-child(3) { animation-delay: 0.15s; }
.day-column:nth-child(4) { animation-delay: 0.2s; }
.day-column:nth-child(5) { animation-delay: 0.25s; }
.day-column:nth-child(6) { animation-delay: 0.3s; }
.day-column:nth-child(7) { animation-delay: 0.35s; }

.day-header {
    padding: 1rem;
    background: var(--color-bg-card);
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.day-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

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

.day-header.weekend .day-name {
    color: var(--color-accent);
}

.classes-list {
    padding: 0.75rem;
    max-height: 600px;
    overflow-y: auto;
}

.classes-list::-webkit-scrollbar {
    width: 4px;
}

.classes-list::-webkit-scrollbar-track {
    background: transparent;
}

.classes-list::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 2px;
}

.class-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0.875rem;
    margin-bottom: 0.75rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.class-card:last-child {
    margin-bottom: 0;
}

.class-card:hover {
    border-color: var(--color-border-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.class-card.waiting {
    border-color: var(--color-accent);
    background: rgba(244, 162, 97, 0.08);
}

.class-time {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.375rem;
}

.class-title {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 0.375rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.class-instructor {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.class-status {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.status-badge {
    padding: 0.25rem 0.5rem;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
}

.status-available {
    background: rgba(126, 200, 163, 0.2);
    color: var(--color-success);
}

.status-waiting {
    background: rgba(244, 162, 97, 0.2);
    color: var(--color-warning);
}

.status-full {
    background: rgba(231, 111, 81, 0.2);
    color: var(--color-danger);
}

.capacity-info {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.waiting-btn {
    width: 100%;
    margin-top: 0.5rem;
    padding: 0.5rem;
    font-size: 0.8rem;
    font-weight: 500;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.waiting-btn.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-bg);
}

/* ============== Auto Booking Page ============== */
.auto-booking-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

.rules-list {
    margin-bottom: 2rem;
}

.rule-card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.4s ease-out;
}

.rule-card.disabled {
    opacity: 0.5;
}

.rule-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.rule-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
}

.rule-actions {
    display: flex;
    gap: 0.5rem;
}

.rule-btn {
    padding: 0.375rem 0.75rem;
    font-size: 0.8rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.rule-btn:hover {
    border-color: var(--color-primary-dim);
    color: var(--color-primary);
}

.rule-btn.delete:hover {
    border-color: var(--color-danger);
    color: var(--color-danger);
}

.rule-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.rule-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.rule-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.rule-value {
    font-size: 0.9rem;
    color: var(--color-text);
}

.rule-days {
    display: flex;
    gap: 0.25rem;
    flex-wrap: wrap;
}

.day-tag {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
    background: var(--color-bg-card);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
}

/* Add Rule Form */
.add-rule-section {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
}

.add-rule-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.rule-form {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.form-group.full-width {
    grid-column: span 2;
}

.days-selector {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.day-checkbox {
    display: none;
}

.day-label {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.day-checkbox:checked + .day-label {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-bg);
}

.time-range {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.time-separator {
    color: var(--color-text-muted);
}

.empty-state {
    text-align: center;
    padding: 3rem;
    color: var(--color-text-muted);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* ============== Responsive ============== */
@media (max-width: 1200px) {
    .schedule-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 900px) {
    .schedule-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .rule-form {
        grid-template-columns: 1fr;
    }
    
    .form-group.full-width {
        grid-column: span 1;
    }
}

@media (max-width: 768px) {
    .main-nav {
        flex-direction: column;
        height: auto;
        padding: 1rem;
        gap: 1rem;
    }
    
    .nav-links {
        width: 100%;
        justify-content: center;
    }
    
    .main-content {
        padding-top: 140px;
    }
    
    .schedule-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .week-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
}

@media (max-width: 500px) {
    .schedule-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-link {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
    }
}

/* ============== Toast Notifications ============== */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    padding: 1rem 1.5rem;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease-out;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.toast.success {
    border-color: var(--color-success);
}

.toast.error {
    border-color: var(--color-danger);
}

.toast-icon {
    font-size: 1.25rem;
}

.toast-message {
    font-size: 0.9rem;
    color: var(--color-text);
}