/* ========================================
   TMC Mini App - Modern Design System
   ======================================== */

:root {
    /* Light Theme Colors */
    --bg-primary: #f8f9fa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f1f3f5;
    
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-tertiary: #adb5bd;
    
    --accent-purple: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --accent-blue: linear-gradient(135deg, #00d2ff 0%, #3a7bd5 100%);
    --accent-green: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --accent-orange: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    
    --spacing-xs: 8px;
    --spacing-sm: 12px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
}

/* Dark Theme */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1a1d23;
        --bg-secondary: #23272f;
        --bg-tertiary: #2c3139;
        
        --text-primary: #ffffff;
        --text-secondary: #b4bac1;
        --text-tertiary: #6c757d;
        
        --shadow-sm: 0 2px 4px rgba(0,0,0,0.2);
        --shadow-md: 0 4px 12px rgba(0,0,0,0.3);
        --shadow-lg: 0 8px 24px rgba(0,0,0,0.4);
    }
}

/* ========================================
   Base Styles
   ======================================== */

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

html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: var(--bg-primary);
    color: var(--text-primary);
}

#app {
    height: 100vh;
    height: -webkit-fill-available;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* ========================================
   Loading State
   ======================================== */

.loading {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    z-index: 9999;
}

.loading.hidden {
    display: none;
}

.loading-spinner {
    position: relative;
    width: 60px;
    height: 60px;
}

.spinner-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 3px solid transparent;
    border-top-color: #667eea;
    border-radius: 50%;
    animation: spin 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

.spinner-ring:nth-child(1) {
    animation-delay: -0.45s;
}

.spinner-ring:nth-child(2) {
    animation-delay: -0.3s;
    border-top-color: #764ba2;
}

.spinner-ring:nth-child(3) {
    animation-delay: -0.15s;
    border-top-color: #f093fb;
}

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

.loading-text {
    margin-top: var(--spacing-lg);
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
}

/* ========================================
   Screen System
   ======================================== */

.screen {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.screen.hidden {
    display: none;
}

.screen.active {
    display: flex;
}

/* ========================================
   Modern Header
   ======================================== */

.app-header {
    background: var(--bg-secondary);
    padding: var(--spacing-lg) var(--spacing-md);
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.header-title h1 {
    font-size: 24px;
    font-weight: 700;
    margin: 0;
    background: var(--accent-purple);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header-title p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* Screen Header */
.screen-header {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
    gap: var(--spacing-sm);
}

.screen-header h2 {
    flex: 1;
    font-size: 20px;
    font-weight: 600;
    text-align: center;
}

.back-btn {
    background: none;
    border: none;
    padding: var(--spacing-xs);
    cursor: pointer;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: background 0.2s;
}

.back-btn:active {
    background: var(--bg-tertiary);
}

.header-spacer {
    width: 40px;
}

/* ========================================
   Main Content
   ======================================== */

.main-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-lg) var(--spacing-md);
}

.screen-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

/* ========================================
   Menu Cards - Modern Grid
   ======================================== */

.menu-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
}

.menu-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: var(--shadow-sm);
    border: 1px solid transparent;
    min-height: 140px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.menu-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    opacity: 0;
    transition: opacity 0.3s;
}

.menu-card.gradient-purple::before { background: var(--accent-purple); }
.menu-card.gradient-blue::before { background: var(--accent-blue); }
.menu-card.gradient-green::before { background: var(--accent-green); }
.menu-card.gradient-orange::before { background: var(--accent-orange); }

.menu-card:active {
    transform: scale(0.97);
    box-shadow: var(--shadow-md);
}

.menu-card:active::before {
    opacity: 1;
}

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
    color: white;
}

.gradient-purple .card-icon { background: var(--accent-purple); }
.gradient-blue .card-icon { background: var(--accent-blue); }
.gradient-green .card-icon { background: var(--accent-green); }
.gradient-orange .card-icon { background: var(--accent-orange); }

.menu-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.menu-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ========================================
   Search Box
   ======================================== */

.search-box {
    position: relative;
    margin-bottom: var(--spacing-md);
}

.search-icon {
    position: absolute;
    left: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    pointer-events: none;
}

.search-box input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 40px;
    border: 2px solid var(--bg-tertiary);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 15px;
    transition: border-color 0.2s;
}

.search-box input:focus {
    outline: none;
    border-color: #667eea;
}

.search-box input::placeholder {
    color: var(--text-tertiary);
}

/* ========================================
   Asset List
   ======================================== */

.asset-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.asset-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: var(--shadow-sm);
    border: 1px solid transparent;
    overflow: hidden;
    display: flex;
    gap: var(--spacing-sm);
}

.asset-card:active {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: #667eea;
}

.asset-photo {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
}

.asset-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.asset-card-content {
    flex: 1;
    padding: var(--spacing-md);
    min-width: 0;
}

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

.asset-name {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.asset-info {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.asset-code {
    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
    font-size: 12px;
    background: var(--bg-tertiary);
    padding: 4px 8px;
    border-radius: 6px;
    color: var(--text-primary);
}

/* Status Badges */
.status-badge {
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.status-available {
    background: rgba(17, 153, 142, 0.15);
    color: #11998e;
}

.status-in_use {
    background: rgba(240, 147, 251, 0.15);
    color: #f093fb;
}

.status-reserved {
    background: rgba(0, 210, 255, 0.15);
    color: #00d2ff;
}

.status-in_repair {
    background: rgba(245, 87, 108, 0.15);
    color: #f5576c;
}

/* ========================================
   Scan Screen
   ======================================== */

.scan-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl);
}

.scan-illustration {
    margin-bottom: var(--spacing-lg);
    animation: float 3s ease-in-out infinite;
}

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

.scan-title {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.scan-description {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 300px;
}

.divider {
    width: 100%;
    text-align: center;
    margin: var(--spacing-lg) 0;
    position: relative;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--bg-tertiary);
}

.divider span {
    position: relative;
    padding: 0 var(--spacing-md);
    background: var(--bg-primary);
    color: var(--text-tertiary);
    font-size: 13px;
}

.manual-input {
    display: flex;
    gap: var(--spacing-xs);
    width: 100%;
    max-width: 400px;
}

.manual-input input {
    flex: 1;
}

/* ========================================
   Asset Detail Card
   ======================================== */

.asset-detail-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-md);
}

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

.asset-header h3 {
    font-size: 20px;
    font-weight: 600;
    flex: 1;
}

.asset-code-display {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
}

.code-label {
    font-size: 13px;
    color: var(--text-secondary);
}

.code-value {
    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
    font-size: 15px;
    font-weight: 600;
}

.asset-info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.info-item {
    display: flex;
    flex-direction: column;
}

.info-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.info-value {
    font-size: 15px;
    font-weight: 500;
}

.asset-description {
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--bg-tertiary);
}

.asset-description p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* ========================================
   Buttons
   ======================================== */

button {
    font-family: inherit;
    cursor: pointer;
    user-select: none;
}

.btn-primary, .btn-secondary, .btn-success, .btn-info, .btn-warning, .btn-action {
    width: 100%;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 17px;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-primary:active {
    transform: translateY(1px);
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:active {
    background: var(--bg-primary);
}

.btn-success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(17, 153, 142, 0.3);
}

.btn-info {
    background: linear-gradient(135deg, #00d2ff 0%, #3a7bd5 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 210, 255, 0.3);
}

.btn-warning {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    box-shadow: 0 4px 12px rgba(240, 147, 251, 0.3);
}

.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: none;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
    flex-shrink: 0;
}

.btn-icon:active {
    background: var(--bg-primary);
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.hidden {
    display: none !important;
}

/* ========================================
   Forms
   ======================================== */

.form-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

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

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

input[type="text"],
input[type="date"],
textarea {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--bg-tertiary);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.2s;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: #667eea;
}

textarea {
    resize: vertical;
    min-height: 100px;
    line-height: 1.5;
}

.input-with-button {
    display: flex;
    gap: var(--spacing-xs);
}

.input-with-button input {
    flex: 1;
}

/* ========================================
   Modals
   ======================================== */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.modal.hidden {
    display: none;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--bg-tertiary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    padding: var(--spacing-xs);
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: background 0.2s;
}

.modal-close:active {
    background: var(--bg-tertiary);
}

.modal-body {
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--bg-tertiary);
    display: flex;
    gap: var(--spacing-sm);
}

.modal-footer button {
    flex: 1;
}

/* ========================================
   Reservations List
   ======================================== */

.reservation-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.reservation-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
}

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

.reservation-title {
    font-size: 16px;
    font-weight: 600;
}

.reservation-info {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.reservation-dates {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.reservation-actions {
    margin-top: var(--spacing-sm);
    display: flex;
    gap: var(--spacing-xs);
}

/* ========================================
   Empty States
   ======================================== */

.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.empty-state svg {
    opacity: 0.3;
    margin-bottom: var(--spacing-md);
}

.empty-state h4 {
    font-size: 16px;
    margin-bottom: var(--spacing-xs);
}

.empty-state p {
    font-size: 14px;
}

/* ========================================
   Utilities
   ======================================== */

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

.mt-2 {
    margin-top: var(--spacing-sm);
}

/* ========================================
   Animations
   ======================================== */

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

.screen.active {
    animation: slideIn 0.3s ease-out;
}

/* ========================================
   Responsive
   ======================================== */

@media (min-width: 768px) {
    .menu-cards {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .asset-info-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}