/* ===== CSS Variables ===== */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #6b7280;
    --success-color: #16a34a;
    --success-hover: #15803d;
    --danger-color: #dc2626;
    --danger-hover: #b91c1c;
    --warning-color: #ea580c;
    --warning-hover: #c2410c;
    
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    --blue-50: #eff6ff;
    --blue-100: #dbeafe;
    --blue-500: #3b82f6;
    --blue-600: #2563eb;
    --blue-700: #1d4ed8;
    
    --green-50: #f0fdf4;
    --green-100: #dcfce7;
    --green-500: #22c55e;
    --green-600: #16a34a;
    --green-700: #15803d;
    
    --red-50: #fef2f2;
    --red-100: #fee2e2;
    --red-500: #ef4444;
    --red-600: #dc2626;
    --red-700: #b91c1c;
    
    --yellow-50: #fffbeb;
    --yellow-100: #fef3c7;
    --yellow-500: #f59e0b;
    --yellow-600: #d97706;
    --yellow-700: #b45309;
    
    --orange-50: #fff7ed;
    --orange-100: #ffedd5;
    --orange-500: #f97316;
    --orange-600: #ea580c;
    --orange-700: #c2410c;
    
    --purple-50: #faf5ff;
    --purple-100: #f3e8ff;
    --purple-500: #a855f7;
    --purple-600: #9333ea;
    --purple-700: #7c3aed;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--gray-50);
}

/* ===== Layout ===== */
#app {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
    padding-top: 5rem; /* Header height */
}

/* ===== Typography ===== */
h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-4);
}

h2 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-3);
}

h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
}

p {
    margin-bottom: var(--spacing-4);
    color: var(--gray-600);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3) var(--spacing-6);
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    gap: var(--spacing-2);
}

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

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--gray-100);
    color: var(--gray-700);
    border: 1px solid var(--gray-300);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--gray-200);
    transform: translateY(-1px);
}

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

.btn-success:hover:not(:disabled) {
    background-color: var(--success-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background-color: var(--danger-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-full {
    width: 100%;
}

.btn-sm {
    padding: var(--spacing-2) var(--spacing-4);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
}

.link-btn {
    background: none;
    border: none;
    color: var(--primary-color);
    text-decoration: underline;
    cursor: pointer;
    font-size: var(--font-size-sm);
    padding: 0;
}

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

/* ===== Forms ===== */
.form-group {
    margin-bottom: var(--spacing-6);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-2);
    font-weight: 500;
    color: var(--gray-700);
}

.required {
    color: var(--danger-color);
}

/* 必填欄位樣式 */
.form-group input[required],
.form-group select[required],
.form-group textarea[required] {
    border-color: #ef4444;
    box-shadow: 0 0 0 1px rgba(239, 68, 68, 0.1);
}

.form-group input[required]:focus,
.form-group select[required]:focus,
.form-group textarea[required]:focus {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-group input[required]:valid,
.form-group select[required]:valid,
.form-group textarea[required]:valid {
    border-color: #10b981;
    box-shadow: 0 0 0 1px rgba(16, 185, 129, 0.1);
}

.form-group label.required::after {
    content: " *";
    color: #ef4444;
    font-weight: bold;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    transition: all 0.2s ease;
}

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

.form-group input:invalid,
.form-group select:invalid,
.form-group textarea:invalid {
    border-color: var(--danger-color);
}

/* ===== Cards ===== */
.card {
    background: white;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-6);
    margin-bottom: var(--spacing-6);
}

.card-header {
    border-bottom: 1px solid var(--gray-200);
    padding-bottom: var(--spacing-4);
    margin-bottom: var(--spacing-6);
}

.card-body {
    flex: 1;
}

.card-footer {
    border-top: 1px solid var(--gray-200);
    padding-top: var(--spacing-4);
    margin-top: var(--spacing-6);
}

/* ===== Grid System ===== */
.grid {
    display: grid;
    gap: var(--spacing-6);
}

.grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* ===== Flexbox Utilities ===== */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}

.space-x-2 > * + * {
    margin-left: var(--spacing-2);
}

.space-x-3 > * + * {
    margin-left: var(--spacing-3);
}

.space-x-4 > * + * {
    margin-left: var(--spacing-4);
}

.space-y-2 > * + * {
    margin-top: var(--spacing-2);
}

.space-y-3 > * + * {
    margin-top: var(--spacing-3);
}

.space-y-4 > * + * {
    margin-top: var(--spacing-4);
}

.space-y-6 > * + * {
    margin-top: var(--spacing-6);
}

/* ===== Spacing Utilities ===== */
.p-2 { padding: var(--spacing-2); }
.p-3 { padding: var(--spacing-3); }
.p-4 { padding: var(--spacing-4); }
.p-6 { padding: var(--spacing-6); }
.p-8 { padding: var(--spacing-8); }

.m-2 { margin: var(--spacing-2); }
.m-3 { margin: var(--spacing-3); }
.m-4 { margin: var(--spacing-4); }
.m-6 { margin: var(--spacing-6); }
.m-8 { margin: var(--spacing-8); }

.mb-2 { margin-bottom: var(--spacing-2); }
.mb-3 { margin-bottom: var(--spacing-3); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.mt-2 { margin-top: var(--spacing-2); }
.mt-3 { margin-top: var(--spacing-3); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

/* ===== Text Utilities ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }
.text-3xl { font-size: var(--font-size-3xl); }

.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-gray-500 { color: var(--gray-500); }
.text-gray-600 { color: var(--gray-600); }
.text-gray-700 { color: var(--gray-700); }
.text-gray-800 { color: var(--gray-800); }

.text-blue-600 { color: var(--blue-600); }
.text-blue-700 { color: var(--blue-700); }

.text-green-600 { color: var(--green-600); }
.text-green-700 { color: var(--green-700); }

.text-red-500 { color: var(--red-500); }
.text-red-600 { color: var(--red-600); }

/* ===== Background Utilities ===== */
.bg-white { background-color: white; }
.bg-gray-50 { background-color: var(--gray-50); }
.bg-gray-100 { background-color: var(--gray-100); }

.bg-blue-50 { background-color: var(--blue-50); }
.bg-blue-100 { background-color: var(--blue-100); }

.bg-green-50 { background-color: var(--green-50); }
.bg-green-100 { background-color: var(--green-100); }

.bg-red-50 { background-color: var(--red-50); }
.bg-red-100 { background-color: var(--red-100); }

.bg-purple-50 { background-color: var(--purple-50); }
.bg-purple-100 { background-color: var(--purple-100); }

/* ===== Border Utilities ===== */
.border { border: 1px solid var(--gray-200); }
.border-2 { border: 2px solid var(--gray-200); }
.border-gray-200 { border-color: var(--gray-200); }
.border-gray-300 { border-color: var(--gray-300); }

.border-blue-500 { border-color: var(--blue-500); }
.border-green-500 { border-color: var(--green-500); }
.border-purple-500 { border-color: var(--purple-500); }

.rounded { border-radius: var(--border-radius); }
.rounded-lg { border-radius: var(--border-radius-lg); }
.rounded-xl { border-radius: var(--border-radius-xl); }
.rounded-full { border-radius: 9999px; }

/* ===== Shadow Utilities ===== */
.shadow { box-shadow: var(--shadow); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* ===== Display Utilities ===== */
.hidden { display: none !important; }
.block { display: block; }
.inline-block { display: inline-block; }
.flex { display: flex; }
.grid { display: grid; }

/* ===== Position Utilities ===== */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }

/* ===== Width & Height Utilities ===== */
.w-full { width: 100%; }
.h-full { height: 100%; }
.min-h-screen { min-height: 100vh; }

/* ===== Transitions ===== */
.transition {
    transition-property: color, background-color, border-color, text-decoration-color, fill, stroke, opacity, box-shadow, transform, filter, backdrop-filter;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    transition-duration: 150ms;
}

.transition-all {
    transition-property: all;
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    transition-duration: 150ms;
}

/* ===== Hover Effects ===== */
.hover\:shadow-lg:hover { box-shadow: var(--shadow-lg); }
.hover\:shadow-xl:hover { box-shadow: var(--shadow-xl); }
.hover\:-translate-y-1:hover { transform: translateY(-0.25rem); }

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { transform: translateX(-100%); }
    to { transform: translateX(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

.slide-in {
    animation: slideIn 0.3s ease-out;
}

.pulse {
    animation: pulse 2s infinite;
}

/* ===== Page System ===== */
.page {
    display: none !important;
    visibility: hidden !important;
    padding: var(--spacing-8) var(--spacing-4);
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.page.active {
    display: block !important;
    visibility: visible !important;
    animation: fadeIn 0.3s ease-out;
}

/* ===== Responsive Design ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.container-sm {
    max-width: 640px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.container-md {
    max-width: 768px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.container-lg {
    max-width: 1024px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

/* ===== Tailwind-like Grid Classes for Date Picker ===== */
.grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.grid-cols-7 {
    grid-template-columns: repeat(7, 1fr);
}

.gap-2 {
    gap: 0.5rem;
}

.gap-3 {
    gap: 0.75rem;
}

.mb-4 {
    margin-bottom: 1rem;
}

/* Mobile first responsive grid */
@media (min-width: 768px) {
    .md\:grid-cols-7 {
        grid-template-columns: repeat(7, 1fr);
    }
    
    .md\:gap-3 {
        gap: 0.75rem;
    }
    
    .md\:text-sm {
        font-size: 0.875rem;
    }
    
    .md\:text-base {
        font-size: 1rem;
    }
}

/* Small mobile styles */
.text-xs {
    font-size: 0.75rem;
}

.text-sm {
    font-size: 0.875rem;
}

.text-base {
    font-size: 1rem;
}

.p-2 {
    padding: 0.5rem;
}

.p-3 {
    padding: 0.75rem;
}

.mt-0\.5 {
    margin-top: 0.125rem;
}

.font-medium {
    font-weight: 500;
}

.text-gray-500 {
    color: #6b7280;
}

.border-gray-200 {
    border-color: #e5e7eb;
}

.hover\:border-gray-300:hover {
    border-color: #d1d5db;
}

.border-blue-500 {
    border-color: #3b82f6;
}

.bg-blue-50 {
    background-color: #eff6ff;
}

.text-blue-700 {
    color: #1d4ed8;
}

.rounded-lg {
    border-radius: 0.5rem;
}

.border {
    border-width: 1px;
}

/* Small mobile specific adjustments */
@media (max-width: 640px) {
    .sm\:p-3 {
        padding: 0.75rem;
    }
}

/* ===== Footer 樣式 ===== */
.site-footer {
    background-color: #D1D5DB;
    color: #6B7280;
    padding: var(--spacing-6) 0;
    margin-top: var(--spacing-8);
    border-top: 1px solid #E5E7EB;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.footer-content {
    text-align: center;
}

.footer-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
    align-items: center;
}

.footer-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
}

.footer-label {
    font-weight: 500;
    color: #6B7280;
}

.footer-value {
    color: #6B7280;
}

/* 手機版footer調整 */
@media (min-width: 640px) {
    .footer-info {
        flex-direction: row;
        justify-content: center;
        gap: var(--spacing-6);
    }
}

/* ===== 我的預約頁面樣式 ===== */
.bookings-grid {
    display: grid;
    gap: var(--spacing-4);
}

.booking-card {
    background: white;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--gray-200);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.booking-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.booking-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-4);
}

.booking-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-900);
    margin: 0;
}

.booking-status {
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-transform: uppercase;
}

.booking-status.confirmed {
    background-color: var(--green-100);
    color: var(--green-700);
}

.booking-status.pending {
    background-color: var(--orange-100);
    color: var(--orange-700);
}

.booking-status.cancelled {
    background-color: var(--red-100);
    color: var(--red-700);
}

.booking-details {
    display: grid;
    gap: var(--spacing-2);
}

.booking-detail {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.booking-detail-label {
    font-weight: 500;
    color: var(--gray-600);
}

.booking-detail-value {
    color: var(--gray-900);
}

.booking-actions {
    margin-top: var(--spacing-4);
    display: flex;
    gap: var(--spacing-2);
    justify-content: flex-end;
}

.empty-state {
    text-align: center;
    padding: var(--spacing-12);
    background: white;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--gray-200);
}

.empty-state-icon {
    width: 4rem;
    height: 4rem;
    margin: 0 auto var(--spacing-4);
    background-color: var(--gray-100);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.empty-state-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-2);
}

.empty-state-description {
    color: var(--gray-600);
    margin-bottom: var(--spacing-6);
}

.loading-state {
    text-align: center;
    padding: var(--spacing-12);
}

.loading-spinner {
    width: 2rem;
    height: 2rem;
    margin: 0 auto var(--spacing-4);
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 體健設施關閉對話框 */
.fitness-dialog-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease;
}

.fitness-dialog {
    background: white;
    border-radius: 16px;
    padding: 2.5rem;
    max-width: 450px;
    width: 90%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s ease;
}

.fitness-dialog-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: bounce 0.6s ease;
}

.fitness-dialog h3 {
    font-size: 1.75rem;
    color: var(--gray-900);
    margin-bottom: 1rem;
    font-weight: 600;
}

.fitness-dialog-text {
    font-size: 1.125rem;
    color: var(--gray-700);
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.fitness-dialog-text strong {
    color: var(--primary-color);
    font-weight: 600;
}

.fitness-dialog-subtext {
    font-size: 0.95rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
}

.fitness-dialog-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.875rem 2.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.fitness-dialog-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.4);
}

.fitness-dialog-btn:active {
    transform: translateY(0);
}

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

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

@keyframes bounce {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

/* 響應式設計 */
@media (max-width: 768px) {
    .fitness-dialog {
        padding: 2rem 1.5rem;
        max-width: 90%;
    }
    
    .fitness-dialog-icon {
        font-size: 3rem;
    }
    
    .fitness-dialog h3 {
        font-size: 1.5rem;
    }
    
    .fitness-dialog-text {
        font-size: 1rem;
    }
}

/* 響應式設計 */
@media (min-width: 768px) {
    .bookings-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    }
}