/* ===========================================
   TOKYO ADVENTURE - Premium Mobile-First Design
   Inspired by Apple & Google Design Systems
   =========================================== */

/* CSS Variables - Light Theme */
:root {
    /* Colors - Refined & Sophisticated */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f1f3f5;
    --bg-elevated: #ffffff;
    
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-tertiary: #6e6e73;
    --text-quaternary: #86868b;
    
    /* Accent Colors */
    --accent-primary: #ff3b30;
    --accent-primary-light: #fff1f0;
    --accent-success: #34c759;
    --accent-success-light: #e8f9ed;
    --accent-gold: #ffb800;
    --accent-gold-light: #fff9e6;
    --accent-purple: #5856d6;
    --accent-purple-light: #f0f0ff;
    --accent-blue: #007aff;
    
    /* Semantic Colors */
    --color-must-do: #ff3b30;
    --color-kid-fav: #ff9500;
    --color-family: #34c759;
    --color-wife: #5856d6;
    
    /* Shadows - Soft & Subtle */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 12px;
    --space-lg: 16px;
    --space-xl: 24px;
    --space-2xl: 32px;
    --space-3xl: 48px;
    
    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-jp: 'Noto Sans JP', 'Hiragino Sans', sans-serif;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
    
    /* Layout */
    --content-width: 640px;
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);
}

/* Dark Theme */
body.dark-mode {
    --bg-primary: #000000;
    --bg-secondary: #1c1c1e;
    --bg-tertiary: #2c2c2e;
    --bg-elevated: #1c1c1e;
    
    --text-primary: #ffffff;
    --text-secondary: #ebebf5;
    --text-tertiary: #aeaeb2;
    --text-quaternary: #636366;
    
    --accent-primary-light: #3a1412;
    --accent-success-light: #0d2818;
    --accent-gold-light: #2b2408;
    --accent-purple-light: #1a1a3e;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background var(--transition-normal), color var(--transition-normal);
    padding-bottom: calc(80px + var(--safe-area-bottom));
}

/* ===========================================
   HERO SECTION - Minimal & Elegant
   =========================================== */

.hero {
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    padding: var(--space-3xl) var(--space-lg) var(--space-xl);
    text-align: center;
    position: relative;
}

body.dark-mode .hero {
    background: linear-gradient(180deg, var(--bg-tertiary) 0%, var(--bg-primary) 100%);
}

.hero-content {
    max-width: var(--content-width);
    margin: 0 auto;
}

.hero-emoji {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--space-md);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.hero h1 {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-xs);
}

.hero-subtitle {
    font-size: 1rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.hero-hotel {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.hero-hotel svg {
    width: 16px;
    height: 16px;
    color: var(--accent-primary);
}

/* ===========================================
   QUICK ACTIONS - Clean Action Bar
   =========================================== */

.quick-actions {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
    max-width: var(--content-width);
    margin: 0 auto;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.quick-actions::-webkit-scrollbar {
    display: none;
}

.quick-action-card {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-elevated);
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-decoration: none;
    color: inherit;
    transition: all var(--transition-fast);
    cursor: pointer;
    flex-shrink: 0;
    font-family: inherit;
    font-size: inherit;
}

body.dark-mode .quick-action-card {
    border-color: rgba(255, 255, 255, 0.08);
}

.quick-action-card:active {
    transform: scale(0.98);
}

.quick-action-card.translator {
    flex: 1;
    min-width: 180px;
}

.quick-action-card.translator .action-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.quick-action-card.translator .action-icon svg {
    stroke: white;
}

.quick-action-card.currency .action-icon {
    background: var(--accent-gold-light);
}

.quick-action-card.currency .action-icon svg {
    stroke: var(--accent-gold);
}

.quick-action-card.theme {
    padding: var(--space-md);
}

.quick-action-card.theme .action-icon {
    background: var(--bg-tertiary);
}

.action-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.action-icon svg {
    width: 20px;
    height: 20px;
}

.action-info {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.action-title {
    font-weight: 600;
    font-size: 0.9375rem;
}

.action-subtitle {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.action-arrow {
    width: 16px;
    height: 16px;
    color: var(--text-quaternary);
    margin-left: auto;
}

/* Theme toggle icons */
.moon-icon { display: none; }
body.dark-mode .sun-icon { display: none; }
body.dark-mode .moon-icon { display: block; }

/* ===========================================
   DAY TABS - Scrollable Navigation
   =========================================== */

.day-tabs {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--bg-primary);
    position: sticky;
    top: 0;
    z-index: 100;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

body.dark-mode .day-tabs {
    border-bottom-color: rgba(255, 255, 255, 0.06);
}

.day-tabs::-webkit-scrollbar {
    display: none;
}

.tab {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-tertiary);
    font-size: 0.75rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    min-width: 64px;
    flex-shrink: 0;
}

.tab-num {
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1;
}

.tab-label {
    white-space: nowrap;
}

.tab.active {
    background: var(--text-primary);
    color: var(--bg-primary);
}

.tab:not(.active):active {
    background: var(--bg-tertiary);
}

/* ===========================================
   MAIN CONTENT
   =========================================== */

.main-content {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: var(--space-lg);
}

/* ===========================================
   DAY SECTION
   =========================================== */

.day-section {
    margin-bottom: var(--space-3xl);
    scroll-margin-top: 80px;
}

.day-intro {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.day-badge {
    display: inline-block;
    background: var(--accent-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.day-badge.tips {
    background: var(--accent-purple);
}

.day-intro h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    letter-spacing: -0.02em;
}

.day-intro p {
    color: var(--text-tertiary);
    font-size: 0.9375rem;
}

/* ===========================================
   ACTIVITY CARDS - Clean & Scannable
   =========================================== */

.activity-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.activity-card {
    background: var(--bg-elevated);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0, 0, 0, 0.04);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.activity-card:hover {
    box-shadow: var(--shadow-md);
}

body.dark-mode .activity-card {
    border-color: rgba(255, 255, 255, 0.06);
}

.activity-card:active {
    transform: scale(0.99);
}

.activity-card.alt-option {
    background: var(--bg-tertiary);
    border-style: dashed;
}

.activity-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
}

.activity-time {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.activity-badge {
    font-size: 0.6875rem;
    font-weight: 600;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.activity-badge.must-do {
    background: var(--accent-primary-light);
    color: var(--accent-primary);
}

.activity-badge.kid-fav {
    background: var(--accent-gold-light);
    color: #c77800;
}

.activity-badge.family {
    background: var(--accent-success-light);
    color: var(--accent-success);
}

.activity-badge.wife {
    background: var(--accent-purple-light);
    color: var(--accent-purple);
}

.activity-card h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}

.activity-card p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: var(--space-md);
}

.activity-footer {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.tag {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    background: var(--bg-tertiary);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    cursor: default;
}

.tag.location {
    cursor: pointer;
    transition: background var(--transition-fast);
}

.tag.location:active {
    background: var(--accent-success-light);
    color: var(--accent-success);
}

.tag.price {
    background: var(--accent-gold-light);
    color: #946200;
}

body.dark-mode .tag.price {
    color: var(--accent-gold);
}

.activity-link {
    display: inline-block;
    margin-top: var(--space-md);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-blue);
    text-decoration: none;
}

.activity-link:active {
    opacity: 0.7;
}

/* ===========================================
   DAY TIPS
   =========================================== */

.day-tips {
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    margin-top: var(--space-xl);
}

.day-tips h4 {
    font-size: 0.9375rem;
    margin-bottom: var(--space-md);
}

.day-tips ul {
    list-style: none;
}

.day-tips li {
    font-size: 0.875rem;
    padding: var(--space-xs) 0;
    padding-left: 1.25rem;
    position: relative;
    opacity: 0.9;
}

.day-tips li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

/* ===========================================
   BUDGET CARD
   =========================================== */

.budget-card {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    margin-bottom: var(--space-xl);
    border: 2px solid var(--accent-gold);
}

.budget-card h3 {
    font-size: 1.0625rem;
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.budget-note {
    font-size: 0.8125rem;
    font-weight: 400;
    color: var(--text-tertiary);
}

.budget-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.budget-item {
    background: var(--bg-secondary);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    text-align: center;
}

.budget-item .amount {
    display: block;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.budget-item .label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: var(--space-xs);
    display: block;
}

.budget-item.total {
    background: var(--text-primary);
}

.budget-item.total .amount {
    color: var(--bg-primary);
}

.budget-item.total .label {
    color: var(--text-tertiary);
}

body.dark-mode .budget-item.total .label {
    color: var(--text-quaternary);
}

/* ===========================================
   TIPS GRID
   =========================================== */

.tips-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.tip-card {
    background: var(--bg-elevated);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

body.dark-mode .tip-card {
    border-color: rgba(255, 255, 255, 0.06);
}

.tip-icon {
    font-size: 1.5rem;
    display: block;
    margin-bottom: var(--space-sm);
}

.tip-card h4 {
    font-size: 0.9375rem;
    margin-bottom: var(--space-xs);
}

.tip-card p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.tip-card a {
    color: var(--accent-blue);
    text-decoration: none;
    font-weight: 500;
}

/* ===========================================
   TECH SECTION
   =========================================== */

.tech-section {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    color: white;
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
}

.tech-section h3 {
    font-size: 1.0625rem;
    margin-bottom: var(--space-lg);
}

.tech-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.tech-item {
    display: grid;
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    gap: var(--space-xs);
    background: rgba(255, 255, 255, 0.06);
    padding: var(--space-md);
    border-radius: var(--radius-md);
}

.tech-name {
    font-weight: 600;
    font-size: 0.9375rem;
}

.tech-price {
    font-weight: 600;
    color: var(--accent-gold);
    font-size: 0.8125rem;
}

.tech-desc {
    grid-column: span 2;
    font-size: 0.8125rem;
    opacity: 0.7;
}

.tech-tip {
    margin-top: var(--space-lg);
    font-size: 0.8125rem;
    opacity: 0.8;
}

/* ===========================================
   MODAL
   =========================================== */

.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-card {
    background: var(--bg-elevated);
    width: 100%;
    max-width: 500px;
    padding: var(--space-xl);
    padding-bottom: calc(var(--space-xl) + var(--safe-area-bottom));
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    transform: translateY(100%);
    transition: transform var(--transition-normal);
    position: relative;
}

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

/* Activity Modal Specific */
.activity-modal-card {
    max-height: 85vh;
    overflow-y: auto;
}

.activity-modal-header {
    margin-bottom: var(--space-xl);
    padding-right: var(--space-xl);
}

.activity-modal-header h2 {
    font-size: 1.375rem;
    font-weight: 700;
    margin-bottom: var(--space-xs);
}

.activity-modal-header p {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.venue-section {
    background: var(--bg-secondary);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
}

.venue-section h4,
.alternatives-section h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.venue-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md);
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--accent-blue);
    font-weight: 500;
    margin-bottom: var(--space-md);
    transition: background var(--transition-fast);
}

.venue-link:active {
    background: var(--bg-tertiary);
}

.venue-info {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.venue-info div {
    padding: var(--space-xs) 0;
}

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

.alt-card {
    background: var(--bg-secondary);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.alt-card:active {
    background: var(--bg-tertiary);
    border-color: var(--accent-blue);
}

.alt-card h5 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.alt-card p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.alt-meta {
    display: flex;
    gap: var(--space-sm);
}

.alt-tag {
    font-size: 0.6875rem;
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    color: var(--text-tertiary);
}

.alt-tag.cost {
    background: var(--accent-gold-light);
    color: #946200;
}

body.dark-mode .alt-tag.cost {
    color: var(--accent-gold);
}

.alt-hint {
    font-size: 0.75rem;
    color: var(--text-quaternary);
    margin-bottom: var(--space-md);
}

/* Suggest Modal */
.suggest-modal-card {
    text-align: center;
    padding-top: var(--space-3xl);
}

.suggest-header {
    margin-bottom: var(--space-lg);
}

.suggest-emoji {
    font-size: 3rem;
    display: block;
    margin-bottom: var(--space-sm);
}

.suggest-header h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

.suggest-header p {
    color: var(--accent-blue);
    font-weight: 600;
}

.suggest-desc {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-bottom: var(--space-xl);
}

.suggest-who p {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
}

.who-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
}

.who-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg) var(--space-2xl);
    background: var(--bg-secondary);
    border: 2px solid var(--bg-tertiary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: inherit;
}

.who-btn:hover {
    border-color: var(--accent-blue);
    background: var(--bg-tertiary);
}

.who-btn:active {
    transform: scale(0.97);
}

.who-avatar {
    font-size: 2rem;
}

.who-btn span:last-child {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--text-primary);
}

/* Suggestion Badge on Activity Cards */
.suggestion-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-size: 0.6875rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    margin-left: var(--space-sm);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.suggestion-badge.mat {
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
}

.suggestion-badge.skye {
    background: linear-gradient(135deg, #ec4899 0%, #be185d 100%);
}

/* Modified Activity Card */
.activity-card.has-suggestion {
    border: 2px solid;
    border-image: linear-gradient(135deg, #667eea 0%, #764ba2 100%) 1;
    border-radius: var(--radius-lg);
}

.activity-card.has-suggestion.mat {
    border-image: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%) 1;
}

.activity-card.has-suggestion.skye {
    border-image: linear-gradient(135deg, #ec4899 0%, #be185d 100%) 1;
}

.suggested-activity {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px dashed var(--bg-tertiary);
}

.suggested-activity-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-xs);
}

.suggested-activity-header span {
    font-size: 0.6875rem;
    color: var(--text-quaternary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.suggested-name {
    font-weight: 600;
    color: var(--accent-purple);
}

.clear-suggestion {
    font-size: 0.75rem;
    color: var(--text-quaternary);
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
    font-family: inherit;
}

.clear-suggestion:hover {
    color: var(--accent-primary);
}

.modal-close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close svg {
    width: 16px;
    height: 16px;
    color: var(--text-secondary);
}

.modal-card h2 {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

.modal-subtitle {
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-bottom: var(--space-xl);
}

.converter-group {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.converter-input {
    flex: 1;
}

.converter-input label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-bottom: var(--space-xs);
}

.converter-input input {
    width: 100%;
    padding: var(--space-md);
    border: 2px solid var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 1.25rem;
    font-weight: 600;
    font-family: inherit;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color var(--transition-fast);
}

.converter-input input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.converter-swap {
    font-size: 1.25rem;
    color: var(--text-quaternary);
    margin-top: 1rem;
}

.quick-amounts {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-xl);
}

.amount-btn {
    padding: var(--space-sm) var(--space-md);
    border: 1px solid var(--bg-tertiary);
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.amount-btn:active {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: white;
}

/* ===========================================
   TOAST
   =========================================== */

.toast {
    position: fixed;
    bottom: calc(100px + var(--safe-area-bottom));
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: var(--space-md) var(--space-xl);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    opacity: 0;
    transition: all var(--transition-normal);
    z-index: 2000;
    box-shadow: var(--shadow-lg);
}

.toast.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

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

/* ===========================================
   FAB (Floating Action Button)
   =========================================== */

.fab {
    position: fixed;
    bottom: calc(24px + var(--safe-area-bottom));
    right: var(--space-lg);
    width: 56px;
    height: 56px;
    border-radius: var(--radius-full);
    background: var(--text-primary);
    color: var(--bg-primary);
    border: none;
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    z-index: 500;
}

.fab svg {
    width: 24px;
    height: 24px;
}

.fab:active {
    transform: scale(0.95);
}

/* ===========================================
   FOOTER
   =========================================== */

footer {
    text-align: center;
    padding: var(--space-3xl) var(--space-lg);
    background: var(--bg-primary);
}

.footer-text {
    font-family: var(--font-jp);
    font-size: 1.5rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-text span {
    display: block;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 400;
    -webkit-text-fill-color: var(--text-tertiary);
    margin-top: var(--space-xs);
}

/* ===========================================
   RESPONSIVE ADJUSTMENTS
   =========================================== */

@media (min-width: 640px) {
    .hero {
        padding: var(--space-3xl) var(--space-xl);
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .quick-actions {
        justify-content: center;
    }
    
    .modal-card {
        border-radius: var(--radius-xl);
        margin: var(--space-xl);
    }
    
    .modal-overlay {
        align-items: center;
    }
    
    .modal-overlay.active .modal-card {
        animation: slideUp var(--transition-normal) ease;
    }
    
    @keyframes slideUp {
        from { transform: translateY(20px); opacity: 0; }
        to { transform: translateY(0); opacity: 1; }
    }
}

@media (max-width: 400px) {
    .tips-grid {
        grid-template-columns: 1fr;
    }
    
    .budget-grid {
        grid-template-columns: 1fr;
    }
}

/* ===========================================
   PRICE DISPLAY SWITCHING
   =========================================== */

.price-display {
    transition: opacity var(--transition-fast);
}

.price-display.switching {
    opacity: 0.5;
}

/* ===========================================
   TOUCH TARGETS
   =========================================== */

@media (pointer: coarse) {
    .tab,
    .quick-action-card,
    .tag.location,
    .activity-link,
    .amount-btn {
        min-height: 44px;
    }
}

/* ===========================================
   SAFE AREA SUPPORT
   =========================================== */

@supports (padding: env(safe-area-inset-bottom)) {
    body {
        padding-bottom: calc(80px + env(safe-area-inset-bottom));
    }
    
    .fab {
        bottom: calc(24px + env(safe-area-inset-bottom));
    }
}

/* ===========================================
   PRINT STYLES
   =========================================== */

@media print {
    .day-tabs,
    .quick-actions,
    .fab,
    .modal-overlay {
        display: none !important;
    }
    
    .day-section {
        break-inside: avoid;
    }
    
    body {
        padding-bottom: 0;
    }
}