/**
 * QuickBooking - Responsive Styles
 * Mobile-first responsive design
 */

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

:root {
    /* Color Palette */
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --primary-light: #5dade2;
    --secondary-color: #27ae60;
    --secondary-dark: #229954;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --text-primary: #2c3e50;
    --text-secondary: #34495e;
    --text-muted: #7f8c8d;
    --background: #f8f9fa;
    --background-white: #ffffff;
    --border-color: #e9ecef;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: var(--spacing-lg) var(--spacing-md);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.app-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.app-subtitle {
    font-size: 14px;
    opacity: 0.9;
    font-weight: 400;
}

.main-content {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: var(--spacing-md);
}

.footer {
    background-color: var(--text-primary);
    color: white;
    text-align: center;
    padding: var(--spacing-md);
    margin-top: auto;
}

.footer-text {
    font-size: 12px;
    opacity: 0.8;
}

/* ===== Screen Management ===== */
.screen {
    animation: fadeIn var(--transition-base);
}

.screen.hidden {
    display: none;
}

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

/* ===== Loading Screen ===== */
.loading-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.btn-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid #ffffff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 8px;
}

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

.loading-text {
    margin-top: var(--spacing-md);
    color: var(--text-muted);
    font-size: 14px;
}

/* ===== Error Screen ===== */
.error-screen {
    text-align: center;
    padding: var(--spacing-xl);
}

.error-icon {
    font-size: 64px;
    margin-bottom: var(--spacing-md);
}

.error-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--danger-color);
    margin-bottom: var(--spacing-sm);
}

.error-message {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

/* ===== Screen Headers ===== */
.screen-header {
    margin-bottom: var(--spacing-lg);
}

.screen-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.screen-subtitle {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ===== Forms ===== */
.form {
    background-color: var(--background-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

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

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

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

.form-input,
.form-textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 16px;
    font-family: inherit;
    transition: border-color var(--transition-fast);
    background-color: var(--background-white);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-hint {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
    font-style: italic;
}

select.form-input {
    cursor: pointer;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

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

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary {
    background-color: var(--text-muted);
    color: white;
}

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

.btn-download {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--secondary-dark) 100%);
    color: white;
    font-size: 18px;
    padding: 16px 32px;
}

.btn-download:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-block {
    width: 100%;
}

.btn-back {
    background: none;
    border: none;
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 600;
    padding: var(--spacing-sm) 0;
    margin-bottom: var(--spacing-md);
    cursor: pointer;
    text-align: left;
}

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

.btn-nav {
    min-width: 100px;
    padding: 10px 16px;
    font-size: 14px;
}

.button-group {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.button-group .btn {
    flex: 1;
}

/* ===== Cards ===== */
.clinic-card,
.doctor-info-card {
    background-color: var(--background-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

/* Doctor Info Header */
.doctor-info-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-md);
}

.doctor-avatar-mini {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.avatar-placeholder-mini {
    font-size: 28px;
}

.doctor-details {
    flex: 1;
}

.doctor-name-card {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 4px 0;
}

.doctor-spec {
    font-size: 14px;
    color: var(--danger-color);
    font-weight: 500;
    margin: 0;
}

/* Workplace Info */
.workplace-info {
    padding-top: var(--spacing-sm);
}

.workplace-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 8px 0;
}

.workplace-address,
.workplace-phone {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 4px 0;
    line-height: 1.5;
}

.clinic-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.doctor-avatar {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    background-color: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.doctor-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    color: white;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.clinic-details {
    flex: 1;
}

.doctor-name {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.doctor-specialization {
    font-size: 14px;
    color: var(--danger-color);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.doctor-designation {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.doctor-experience {
    font-size: 13px;
    color: var(--text-muted);
}

.clinic-info p {
    margin-bottom: var(--spacing-sm);
    font-size: 14px;
    line-height: 1.6;
}

.clinic-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.clinic-type,
.clinic-address,
.clinic-city,
.clinic-phone {
    color: var(--text-secondary);
}

/* ===== Doctor Info Card (Mini) ===== */
.doctor-mini-info {
    text-align: center;
}

.doctor-name-small {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.workplace-name-small {
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 500;
}

/* ===== Date Picker Section ===== */
.date-picker-section {
    background-color: var(--background-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.section-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.date-picker-container {
    margin-bottom: var(--spacing-md);
}

.date-input {
    width: 100%;
}

.date-hint {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: var(--spacing-sm);
    font-style: italic;
    text-align: center;
}

/* ===== Date Navigation ===== */
.date-navigation {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--background-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.date-info {
    flex: 1;
    text-align: center;
}

.current-date {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.date-counter {
    font-size: 12px;
    color: var(--text-muted);
}

/* ===== Slots Grid ===== */
.slots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.slot-card {
    background-color: var(--background-white);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.slot-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.slot-card:active {
    transform: translateY(0);
}

.slot-time {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.slot-status {
    font-size: 12px;
    color: var(--secondary-color);
    font-weight: 500;
}

/* ===== No Slots Message ===== */
.no-slots-container {
    background-color: var(--background-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.no-slots-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.no-slots-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--warning-color);
    margin-bottom: var(--spacing-sm);
}

.no-slots-text {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

/* ===== Confirmation Screen ===== */
.confirmation-card {
    background-color: var(--background-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
}

.confirmation-section {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.confirmation-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.confirmation-section-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.confirmation-details p {
    margin-bottom: var(--spacing-sm);
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.confirmation-details strong {
    color: var(--text-primary);
}

/* ===== Success Screen ===== */
.success-animation {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.success-checkmark {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: white;
    animation: scaleIn var(--transition-slow);
}

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

.success-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--secondary-color);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.success-card {
    background-color: var(--background-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-xl);
}

.success-details {
    font-size: 14px;
}

.success-item {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.success-item:last-child {
    border-bottom: none;
}

.success-item strong {
    color: var(--text-primary);
    font-weight: 600;
    display: inline-block;
    min-width: 120px;
}

.success-note {
    background-color: #e8f8f5;
    border-left: 4px solid var(--secondary-color);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== App Download Section ===== */
.app-download-section {
    background: linear-gradient(135deg, #e8f4f8 0%, #d5e8f0 100%);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.download-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.download-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.download-text {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.download-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: var(--spacing-sm);
    font-style: italic;
}

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

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) {
    .app-title {
        font-size: 28px;
    }
    
    .main-content {
        padding: var(--spacing-lg);
    }
    
    .form {
        padding: var(--spacing-xl);
    }
    
    .slots-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
    .app-title {
        font-size: 32px;
    }
    
    .screen-title {
        font-size: 26px;
    }
    
    .main-content {
        padding: var(--spacing-xl);
    }
    
    .button-group {
        gap: var(--spacing-lg);
    }
    
    .slots-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
    .main-content {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
    
    .form,
    .clinic-card,
    .confirmation-card,
    .success-card {
        max-width: 800px;
        margin-left: auto;
        margin-right: auto;
    }
    
    .slots-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}

/* Extra large devices (large desktops, 1200px and up) */
@media (min-width: 1200px) {
    .slots-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* ===== Print Styles ===== */
@media print {
    .header,
    .footer,
    .btn,
    .app-download-section {
        display: none;
    }
    
    .main-content {
        padding: 0;
    }
    
    .success-card {
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
}

/* ===== Accessibility ===== */
.btn:focus,
.form-input:focus,
.form-textarea:focus,
.slot-card:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Reduced motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}