/* ============================================
   Apple Design System - Variables
   ============================================ */
:root {
    --color-bg: #000000;
    --color-surface: rgba(28, 28, 30, 0.8);
    --color-surface-elevated: rgba(44, 44, 46, 0.8);
    
    --color-label-primary: #ffffff;
    --color-label-secondary: rgba(235, 235, 245, 0.6);
    --color-label-tertiary: rgba(235, 235, 245, 0.3);
    
    --color-accent: #0a84ff;
    --color-accent-secondary: #5e5ce6;
    --color-green: #30d158;
    --color-orange: #ff9f0a;
    --color-red: #ff453a;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', sans-serif;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    
    --transition-fast: 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-smooth: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
    --transition-spring: 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-label-primary);
    min-height: 100vh;
    min-height: 100dvh;
    line-height: 1.4;
    overflow-x: hidden;
}

.noise {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    z-index: 1000;
}

/* ============================================
   Container
   ============================================ */
.container {
    max-width: 480px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    padding-top: env(safe-area-inset-top, 20px);
    padding-bottom: calc(100px + env(safe-area-inset-bottom, 20px));
}

/* ============================================
   Header
   ============================================ */
.header {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.header-top {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.header-label {
    font-size: 0.8125rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-label-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.header-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.5px;
    margin-bottom: var(--spacing-xs);
}

.header-subtitle {
    font-size: 1.0625rem;
    color: var(--color-label-secondary);
    font-weight: var(--font-weight-medium);
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    border-radius: 100px;
    font-size: 0.6875rem;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    background: var(--color-green);
    color: #000;
}

.badge.running {
    background: var(--color-green);
}

.badge.waiting {
    background: var(--color-orange);
}

.badge.ended {
    background: var(--color-red);
}

.badge.saturday {
    background: var(--color-accent-secondary);
    color: #fff;
}

/* ============================================
   Time Hero
   ============================================ */
.time-hero {
    text-align: center;
    padding: var(--spacing-lg) 0 var(--spacing-2xl);
}

.time-wrapper {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 4px;
}

.current-time {
    font-size: 5rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: -3px;
    line-height: 1;
    background: linear-gradient(180deg, #fff 0%, rgba(255,255,255,0.7) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.current-seconds {
    font-size: 2rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-label-secondary);
    opacity: 0.6;
    min-width: 2.5rem;
    animation: secondsPulse 1s ease-in-out infinite;
}

@keyframes secondsPulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 0.3; }
}

.current-date {
    font-size: 1.0625rem;
    color: var(--color-label-secondary);
    margin-top: var(--spacing-sm);
    font-weight: var(--font-weight-medium);
}

/* ============================================
   Glass Card
   ============================================ */
.glass-card {
    background: var(--color-surface);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

/* ============================================
   Main Card
   ============================================ */
.main-card {
    padding: var(--spacing-xl);
}

.next-shuttle-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.label {
    font-size: 0.8125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-label-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.train-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--color-label-secondary);
    background: rgba(255, 255, 255, 0.06);
    padding: 6px 12px;
    border-radius: 100px;
}

.train-badge svg {
    width: 14px;
    height: 14px;
    opacity: 0.7;
}

.next-shuttle-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.time-display-large {
    display: flex;
    flex-direction: column;
}

.time-value {
    font-size: 3.5rem;
    font-weight: var(--font-weight-bold);
    letter-spacing: -2px;
    line-height: 1;
}

.time-label {
    font-size: 0.875rem;
    color: var(--color-label-secondary);
    margin-top: var(--spacing-xs);
    font-weight: var(--font-weight-medium);
}

/* ============================================
   Countdown Ring - 수정됨
   ============================================ */
.countdown-ring {
    position: relative;
    width: 100px;
    height: 100px;
    flex-shrink: 0;
}

.progress-ring {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-ring-bg {
    fill: none;
    stroke: rgba(255, 255, 255, 0.08);
    stroke-width: 6;
}

.progress-ring-fill {
    fill: none;
    stroke: var(--color-accent);
    stroke-width: 6;
    stroke-linecap: round;
    stroke-dasharray: 339.292;
    stroke-dashoffset: 0; /* 초기값을 0으로 변경 */
    transition: stroke-dashoffset 1s linear, stroke 0.3s ease;
}


.progress-ring-fill.urgent {
    stroke: var(--color-red);
}

.progress-ring-fill.soon {
    stroke: var(--color-orange);
}

.countdown-inner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.countdown-value {
    font-size: 1.75rem;
    font-weight: var(--font-weight-bold);
    display: block;
    line-height: 1;
}

.countdown-value.urgent {
    color: var(--color-red);
}

.countdown-value.soon {
    color: var(--color-orange);
}

.countdown-unit {
    font-size: 0.6875rem;
    color: var(--color-label-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 2px;
    display: block;
}

/* Route Indicator */
.route-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    font-size: 0.8125rem;
    color: var(--color-label-secondary);
    font-weight: var(--font-weight-medium);
}

.route-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
}

.route-line {
    flex: 1;
    max-width: 80px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-secondary));
    border-radius: 1px;
}

/* ============================================
   Schedule Card
   ============================================ */
.schedule-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.schedule-title {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
}

.schedule-count {
    font-size: 0.75rem;
    color: var(--color-label-tertiary);
    background: rgba(255, 255, 255, 0.06);
    padding: 4px 10px;
    border-radius: 100px;
    font-weight: var(--font-weight-medium);
}

.schedule-list {
    max-height: 360px;
    overflow-y: auto;
    margin: 0 calc(var(--spacing-lg) * -1);
    padding: 0 var(--spacing-lg);
}

.schedule-list::-webkit-scrollbar {
    width: 0;
}

/* Schedule Item */
.schedule-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.schedule-item:last-child {
    margin-bottom: 0;
}

.schedule-item.passed {
    opacity: 0.3;
}

.schedule-item.next {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-secondary));
    transform: scale(1.02);
}

.schedule-item.next .item-sub,
.schedule-item.next .item-remain {
    color: rgba(255, 255, 255, 0.8);
}

.item-time {
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    min-width: 60px;
    letter-spacing: -0.5px;
}

.item-info {
    flex: 1;
    margin-left: var(--spacing-md);
}

.item-sub {
    font-size: 0.75rem;
    color: var(--color-label-tertiary);
}

.item-remain {
    font-size: 0.8125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-accent);
    text-align: right;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.8;
}

.empty-title {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-sm);
}

.empty-desc {
    font-size: 0.875rem;
    color: var(--color-label-secondary);
    line-height: 1.6;
}

/* ============================================
   Info Section
   ============================================ */
.info-section {
    padding: var(--spacing-lg) 0;
}

.info-title {
    font-size: 0.8125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--color-label-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-md);
}

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

.info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.info-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.info-icon svg {
    width: 16px;
    height: 16px;
    color: var(--color-label-secondary);
}

.info-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.info-label {
    font-size: 0.6875rem;
    color: var(--color-label-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.info-value {
    font-size: 0.8125rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-label-primary);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    text-align: center;
    padding: var(--spacing-xl) 0;
    color: var(--color-label-tertiary);
    font-size: 0.75rem;
    line-height: 1.8;
}

/* ============================================
   FAB Button
   ============================================ */
.fab {
    position: fixed;
    bottom: calc(24px + env(safe-area-inset-bottom, 0px));
    right: 24px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-surface-elevated);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-spring);
    z-index: 100;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.fab svg {
    width: 22px;
    height: 22px;
    color: var(--color-label-primary);
    transition: transform var(--transition-smooth);
}

.fab:hover {
    transform: scale(1.05);
    background: var(--color-surface-elevated);
}

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

.fab:active svg {
    transform: rotate(180deg);
}

/* ============================================
   Animations
   ============================================ */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

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

.schedule-item {
    animation: fadeIn 0.3s ease backwards;
}

.schedule-item:nth-child(1) { animation-delay: 0.05s; }
.schedule-item:nth-child(2) { animation-delay: 0.1s; }
.schedule-item:nth-child(3) { animation-delay: 0.15s; }
.schedule-item:nth-child(4) { animation-delay: 0.2s; }
.schedule-item:nth-child(5) { animation-delay: 0.25s; }

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 380px) {
    .current-time {
        font-size: 4rem;
    }
    
    .current-seconds {
        font-size: 1.5rem;
    }
    
    .time-value {
        font-size: 2.75rem;
    }
    
    .countdown-ring {
        width: 80px;
        height: 80px;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Light Mode
   ============================================ */
@media (prefers-color-scheme: light) {
    :root {
        --color-bg: #f2f2f7;
        --color-surface: rgba(255, 255, 255, 0.8);
        --color-surface-elevated: rgba(255, 255, 255, 0.9);
        --color-label-primary: #000000;
        --color-label-secondary: rgba(60, 60, 67, 0.6);
        --color-label-tertiary: rgba(60, 60, 67, 0.3);
        --color-accent: #007aff;
    }
    
    .current-time {
        background: linear-gradient(180deg, #000 0%, rgba(0,0,0,0.7) 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    
    .current-seconds {
        color: var(--color-label-secondary);
    }
    
    .glass-card {
        border: 1px solid rgba(0, 0, 0, 0.04);
    }
    
    .badge {
        color: #fff;
    }
    
    .noise {
        opacity: 0.02;
    }
}