/* ==========================================
   밀리초타이머 - 스타일시트
   ========================================== */

/* ==========================================
   1. CSS 변수 & 디자인 토큰
   ========================================== */
:root {
    /* 라이트 테마 컬러 */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-bg-card: #ffffff;
    --color-text-primary: #1a1a1a;
    --color-text-secondary: #6c757d;
    --color-text-muted: #adb5bd;
    --color-border: #e9ecef;
    --color-shadow: rgba(0, 0, 0, 0.1);

    /* 브랜드 컬러 (그라디언트) */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    /* 심플해진 히어로 배경 (라이트 모드: 깨끗한 화이트/그레이 톤) */
    --gradient-hero: linear-gradient(180deg, #FFFFFF 0%, #F5F5F7 100%);

    /* 타이포그래피 */
    --font-primary: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* 간격 시스템 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* 반경 */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;

    /* 그림자 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);

    /* 전환 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* 다크 테마 */
[data-theme="dark"] {
    --color-bg-primary: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-card: #1e293b;
    --color-text-primary: #f8fafc;
    --color-text-secondary: #cbd5e1;
    --color-text-muted: #64748b;
    --color-border: #334155;
    --color-shadow: rgba(0, 0, 0, 0.3);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);

    /* 다크 모드 히어로 배경 */
    --gradient-hero: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
}

/* ==========================================
   2. 리셋 & 기본 스타일
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: opacity var(--transition-fast);
}

a:hover {
    opacity: 0.8;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
    transition: all var(--transition-fast);
}

/* ==========================================
   3. 레이아웃 & 컨테이너
   ========================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-2xl) 0;
}

/* ==========================================
   4. 헤더 & 내비게이션
   ========================================== */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 2.3rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.logo-icon {
    width: 40px;
    height: 40px;
    object-fit: contain;
    transition: transform var(--transition-fast);
}

.logo:hover .logo-icon {
    transform: scale(1.1);
}

/* 테마별 아이콘 표시 */
.logo-icon-dark {
    display: none;
}

.logo-icon-light {
    display: block;
}

[data-theme="dark"] .logo-icon-dark {
    display: block;
}

[data-theme="dark"] .logo-icon-light {
    display: none;
}

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

/* 언어 & 테마 스위치 */
.switch-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.switch {
    position: relative;
    display: inline-block;
    width: 56px;
    height: 28px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-border);
    transition: var(--transition-normal);
    border-radius: 28px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background: white;
    transition: var(--transition-normal);
    border-radius: 50%;
}

input:checked+.slider {
    background: var(--gradient-primary);
}

input:checked+.slider:before {
    transform: translateX(28px);
}

.theme-button {
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.theme-button:hover {
    background: var(--color-border);
    color: var(--color-text-primary);
}

.theme-button.active {
    background: var(--gradient-primary);
    color: white;
}

/* ==========================================
   5. 히어로 섹션
   ========================================== */
.hero {
    position: relative;
    padding: var(--spacing-xl) 0;
    background: var(--gradient-hero);
    overflow: hidden;
}



.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    color: var(--color-text-primary);
    /* 배경에 맞춰 텍스트 색상 자동 조정 */
}

/* 히어로 아이콘 */
.hero-icon-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-app-icon {
    width: 280px;
    height: 280px;
    object-fit: contain;
    filter: drop-shadow(0 20px 60px rgba(0, 0, 0, 0.3));
    animation: fadeInLeft 0.8s ease;
    transition: transform var(--transition-normal);
}

.hero-app-icon:hover {
    transform: scale(1.05) rotate(-2deg);
}

/* 테마별 히어로 아이콘 표시 */
.hero-icon-dark {
    display: none;
}

.hero-icon-light {
    display: block;
}

[data-theme="dark"] .hero-icon-dark {
    display: block;
}

[data-theme="dark"] .hero-icon-light {
    display: none;
}

/* 히어로 텍스트 */
.hero-text-wrapper {
    display: flex;
    flex-direction: column;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    animation: fadeInRight 0.6s ease;
}

.hero-subtitle {
    font-size: 1.25rem;
    line-height: 1.4;
    opacity: 0.95;
    animation: fadeInRight 0.6s ease 0.1s backwards;
}

.hero-rating {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: 2.5rem;
    animation: fadeInRight 0.6s ease 0.2s backwards;
}

.stars {
    font-size: 1.5rem;
    letter-spacing: 2px;
}

.rating-text {
    font-size: 1rem;
    opacity: 0.9;
}

/* Apple 공식 다운로드 배지 */
.download-badges {
    margin-top: 0.8rem;
    animation: fadeInRight 0.6s ease 0.3s backwards;
}

.download-badge {
    display: inline-block;
    transition: transform var(--transition-normal), opacity var(--transition-fast);
}

.download-badge:hover {
    transform: scale(1.05);
    opacity: 0.9;
}

.download-badge-img {
    height: 72px;
    width: auto;
    object-fit: contain;
}

/* 언어별 배지 표시 */
.download-badge-en {
    display: none;
}

.download-badge-ko {
    display: inline-block;
}

[lang="en"] .download-badge-en {
    display: inline-block;
}

[lang="en"] .download-badge-ko {
    display: none;
}

/* ==========================================
   6. 기능 섹션
   ========================================== */
.features {
    background: var(--color-bg-secondary);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text-primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--color-bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ==========================================
   7. 스크린샷 섹션
   ========================================== */
.screenshots-gallery {
    display: flex;
    gap: var(--spacing-lg);
    overflow-x: auto;
    padding: var(--spacing-md);
    scroll-snap-type: x mandatory;
    scrollbar-width: thin;
    scrollbar-color: var(--color-primary) var(--color-bg-secondary);
    justify-content: flex-start;
}

/* 커스텀 스크롤바 디자인 */
.screenshots-gallery::-webkit-scrollbar {
    height: 8px;
}

.screenshots-gallery::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
    border-radius: 4px;
}

.screenshots-gallery::-webkit-scrollbar-thumb {
    background-color: var(--color-primary);
    border-radius: 4px;
}

.screenshots-gallery::-webkit-scrollbar-thumb:hover {
    background-color: var(--color-primary-dark);
}

.screenshot-item {
    flex: 0 0 auto;
    width: 280px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    scroll-snap-align: center;
    transition: transform var(--transition-normal);
    position: relative;
}

.screenshot-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.screenshot-img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-lg);
}



/* ==========================================
   8. 통계 섹션
   ========================================== */
.stats {
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
    text-align: center;
    padding: var(--spacing-lg) 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
}

.stat-item {
    padding: var(--spacing-lg);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--spacing-xs);
    opacity: 0.95;
}

.stat-label {
    font-size: 1.125rem;
    opacity: 0.9;
}

/* ==========================================
   9. 푸터
   ========================================== */
.footer {
    background: var(--color-bg-secondary);
    padding: var(--spacing-xl) 0;
    text-align: center;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    color: var(--color-text-secondary);
}

.copyright {
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.footer-link {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-primary);
}

/* ==========================================
   10. 애니메이션
   ========================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }
}

/* ==========================================
   11. 반응형 디자인
   ========================================== */

/* 태블릿 */
@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-lg);
    }

    .hero-icon-wrapper {
        order: -1;
    }

    .hero-app-icon {
        width: 200px;
        height: 200px;
    }

    .hero-rating {
        justify-content: center;
    }

    .download-button {
        align-self: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .features-grid,
    .reviews-grid {
        grid-template-columns: 1fr;
    }

    .header-content {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .header-controls {
        justify-content: center;
        width: 100%;
        gap: var(--spacing-md);
    }

    /* 공간 확보를 위해 모바일에서는 테마 텍스트 숨김 */
    .theme-button span {
        display: none;
    }

    .theme-button {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 1.1rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* 모바일 */
@media (max-width: 480px) {
    .hero-app-icon {
        width: 160px;
        height: 160px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section {
        padding: var(--spacing-xl) 0;
    }

    .download-button {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 1rem;
    }

    .feature-card {
        padding: var(--spacing-lg);
    }
}

/* ==========================================
   12. 유틸리티 클래스
   ========================================== */
.text-center {
    text-align: center;
}

.hidden {
    display: none;
}

.fade-in {
    animation: fadeInUp 0.6s ease;
}