/* ===== BASE STYLES ===== */
:root {
    /* LINEテーマカラー */
    --line-green: #00C300;
    --line-gray: #f8f9fa;
    --line-dark-gray: #6c757d;
    
    /* 痛みレベルカラー */
    --pain-red: #ff4757;
    --pain-orange: #ff6b35;
    --pain-yellow: #ffa502;
    --pain-green: #2ed573;
    --success-green: #2ed573;
    
    /* システムカラー */
    --primary-color: #00C300;
    --secondary-color: #495057;
    --accent-color: #007bff;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    
    /* グレースケール */
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --medium-gray: #e9ecef;
    --dark-gray: #6c757d;
    --darker-gray: #495057;
    --black: #212529;
    
    /* フォント */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --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;
    
    /* スペーシング */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* 角丸 */
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    /* シャドウ */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Z-index */
    --z-header: 1000;
    --z-nav: 1100;
    --z-modal: 1200;
    --z-loading: 1300;
}

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.5;
    color: var(--black);
    background-color: var(--light-gray);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ===== LAYOUT ===== */
.mobile-container {
    max-width: 100vw;
    min-height: 100vh;
    padding: 0;
    margin: 0 auto;
    background-color: var(--light-gray);
    position: relative;
    padding-bottom: 80px; /* Bottom nav height */
}

/* ===== LOADING SCREEN ===== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, #00a82d 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
}

.loading-spinner {
    text-align: center;
    color: white;
}

.loading-spinner i {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    animation: pulse 2s ease-in-out infinite alternate;
}

.loading-spinner p {
    font-size: var(--font-size-lg);
    font-weight: 500;
}

@keyframes pulse {
    from { opacity: 0.5; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1.1); }
}

/* ===== LOGIN SCREEN ===== */
.login-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, #00a82d 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    padding: var(--spacing-xl);
}

.login-content {
    text-align: center;
    color: white;
    max-width: 320px;
    width: 100%;
}

.app-logo {
    margin-bottom: var(--spacing-2xl);
}

.app-logo i {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    display: block;
}

.app-logo h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.login-description {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.9;
    line-height: 1.6;
}

.login-button {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-xl);
    background-color: white;
    color: var(--primary-color);
    border: none;
    border-radius: var(--border-radius-xl);
    font-size: var(--font-size-lg);
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-lg);
}

.login-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.login-button i {
    font-size: var(--font-size-xl);
}

/* ===== HEADER ===== */
.app-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #00a82d 100%);
    color: white;
    padding: var(--spacing-lg) var(--spacing-md);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: var(--z-header);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 100%;
}

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

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.user-name {
    font-weight: 500;
    font-size: var(--font-size-lg);
}

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

.notification-btn,
.settings-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.notification-btn:hover,
.settings-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.notification-badge {
    position: absolute;
    top: 5px;
    right: 5px;
    background-color: var(--danger-color);
    color: white;
    font-size: var(--font-size-xs);
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

/* ===== PAGE HEADER ===== */
.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #00a82d 100%);
    color: white;
    padding: var(--spacing-lg) var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: var(--z-header);
}

.back-button,
.export-btn,
.history-btn,
.help-btn {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.back-button:hover,
.export-btn:hover,
.history-btn:hover,
.help-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.page-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    flex: 1;
    text-align: center;
}

.header-spacer {
    width: 40px;
}

/* ===== SECTIONS ===== */
.section-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--darker-gray);
    margin-bottom: var(--spacing-lg);
    padding: 0 var(--spacing-md);
}

.section-title i {
    color: var(--primary-color);
}

/* ===== DASHBOARD ===== */
.dashboard {
    padding: var(--spacing-lg) 0;
}

/* Quick Status */
.quick-status {
    padding: 0 var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.status-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.status-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all 0.3s ease;
}

.status-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.status-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
}

.pain-card .status-icon {
    background: rgba(255, 71, 87, 0.1);
    color: var(--pain-red);
}

.exercise-card .status-icon {
    background: rgba(0, 195, 0, 0.1);
    color: var(--primary-color);
}

.status-content {
    display: flex;
    flex-direction: column;
}

.status-label {
    font-size: var(--font-size-sm);
    color: var(--dark-gray);
    margin-bottom: var(--spacing-xs);
}

.status-value {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--black);
}

/* Progress Section */
.progress-section {
    margin-bottom: var(--spacing-xl);
}

.chart-container {
    background: white;
    margin: 0 var(--spacing-md);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

/* Quick Actions */
.quick-actions {
    margin-bottom: var(--spacing-xl);
}

.action-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    padding: 0 var(--spacing-md);
}

.action-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.action-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.action-card i {
    font-size: var(--font-size-2xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.action-card span {
    font-weight: 600;
    color: var(--black);
    font-size: var(--font-size-base);
}

.action-card small {
    color: var(--dark-gray);
    font-size: var(--font-size-sm);
}

/* Today's Exercises */
.today-exercises {
    margin-bottom: var(--spacing-xl);
}

.exercises-container {
    padding: 0 var(--spacing-md);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 44px;
}

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

.btn-primary:hover {
    background-color: #00a82d;
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--medium-gray);
    color: var(--darker-gray);
}

.btn-secondary:hover {
    background-color: var(--dark-gray);
    color: white;
}

.btn-block {
    width: 100%;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

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

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

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius-md);
    font-size: var(--font-size-base);
    transition: border-color 0.3s ease;
    background-color: white;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 195, 0, 0.2);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* ===== PAIN SLIDER ===== */
.pain-slider-container {
    padding: var(--spacing-lg) var(--spacing-sm);
}

.pain-slider {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(to right, var(--success-green), var(--pain-yellow), var(--pain-red));
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.pain-slider::-webkit-slider-thumb {
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: white;
    border: 2px solid var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow-md);
}

.pain-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: white;
    border: 2px solid var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow-md);
}

.pain-labels {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--dark-gray);
}

/* ===== BODY MAP ===== */
.body-map-container {
    background: white;
    margin: 0 var(--spacing-md);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

.body-map {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.body-svg {
    max-width: 100%;
    height: auto;
    max-height: 400px;
}

.body-part {
    cursor: pointer;
    transition: all 0.3s ease;
}

.clickable-part {
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.clickable-part:hover {
    fill: rgba(0, 195, 0, 0.3) !important;
    stroke-width: 3 !important;
    transform: scale(1.05);
    transform-origin: center;
}

.clickable-part.selected {
    fill: var(--primary-color) !important;
    stroke: #ffffff !important;
    stroke-width: 3 !important;
}

.body-svg {
    max-width: 100%;
    height: auto;
    max-height: 400px;
    touch-action: manipulation;
}

.selected-parts h3 {
    font-size: var(--font-size-lg);
    color: var(--darker-gray);
    margin-bottom: var(--spacing-md);
}

.parts-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.part-tag {
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    font-size: var(--font-size-sm);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin: var(--spacing-xs);
    animation: fadeInScale 0.3s ease;
}

.remove-part {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.remove-part:hover {
    background: rgba(255, 255, 255, 0.4);
}

.empty-selection {
    color: var(--dark-gray);
    font-style: italic;
    margin: 0;
    padding: var(--spacing-md);
    text-align: center;
    background: var(--light-gray);
    border-radius: var(--border-radius-md);
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ===== BOTTOM NAVIGATION ===== */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid var(--medium-gray);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) 0;
    z-index: var(--z-nav);
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--dark-gray);
    transition: color 0.3s ease;
    text-decoration: none;
}

.nav-item.active {
    color: var(--primary-color);
}

.nav-item i {
    font-size: var(--font-size-lg);
}

.nav-item span {
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* ===== MODAL ===== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    padding: var(--spacing-lg);
}

.modal-content {
    background: white;
    border-radius: var(--border-radius-lg);
    max-width: 400px;
    width: 100%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

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

.modal-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    cursor: pointer;
    color: var(--dark-gray);
}

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

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--medium-gray);
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 360px) {
    .mobile-container {
        padding: 0;
    }
    
    .status-grid,
    .action-grid {
        grid-template-columns: 1fr;
    }
    
    .header-content {
        padding: 0 var(--spacing-sm);
    }
    
    .user-name {
        font-size: var(--font-size-base);
    }
}

@media (min-width: 768px) {
    .mobile-container {
        max-width: 428px;
        margin: 0 auto;
        box-shadow: var(--shadow-xl);
    }
}