/**
 * WalkSafe - 스타일시트
 * 초등학생 친화적 모바일 중심 디자인
 */

/* ========================================
   CSS 변수 (디자인 토큰)
======================================== */
:root {
    /* 색상 */
    --primary-color: #4CAF50;
    --primary-dark: #388E3C;
    --primary-light: #C8E6C9;
    --secondary-color: #FF9800;
    --danger-color: #F44336;
    --warning-color: #FFC107;

    /* 텍스트 */
    --text-primary: #212121;
    --text-secondary: #757575;
    --text-light: #FFFFFF;

    /* 배경 */
    --bg-primary: #FAFAFA;
    --bg-card: #FFFFFF;
    --bg-gradient: linear-gradient(135deg, #4CAF50 0%, #8BC34A 100%);

    /* 그림자 */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);

    /* 간격 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* 둥글기 */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 50%;

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

/* ========================================
   기본 리셋 및 글로벌 스타일
======================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ========================================
   페이지 레이아웃
======================================== */
.page {
    max-width: 480px;
    margin: 0 auto;
    padding: var(--spacing-md);
    padding-bottom: 100px;
}

/* ========================================
   랜딩 히어로 섹션
======================================== */
.landing-hero {
    background: var(--bg-gradient);
    color: var(--text-light);
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    margin: calc(var(--spacing-md) * -1);
    margin-bottom: var(--spacing-lg);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.hero-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto var(--spacing-lg);
}

.hero-icon svg {
    width: 100%;
    height: 100%;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 1.1rem;
    opacity: 0.95;
    margin-bottom: var(--spacing-lg);
    line-height: 1.5;
}

/* ========================================
   버튼 스타일
======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    min-width: 120px;
}

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

.btn-primary:hover, .btn-primary:active {
    background: var(--primary-light);
    transform: scale(1.02);
}

.btn-secondary {
    background: var(--primary-light);
    color: var(--primary-dark);
}

.btn-danger {
    background: var(--danger-color);
    color: var(--text-light);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.2rem;
    border-radius: var(--radius-lg);
}

.btn-block {
    width: 100%;
}

/* ========================================
   특징 섹션
======================================== */
.features {
    margin-bottom: var(--spacing-lg);
}

.features-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

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

.feature-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.feature-icon {
    font-size: 2rem;
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    border-radius: var(--radius-md);
}

.feature-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.feature-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ========================================
   부모님 안내 섹션
======================================== */
.parent-info {
    background: #FFF8E1;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--secondary-color);
}

.parent-info-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.parent-info-content {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.parent-info-content ul {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
}

.parent-info-content li {
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   제한사항 안내
======================================== */
.limitations {
    background: #FFEBEE;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid var(--danger-color);
}

.limitations-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--danger-color);
}

.limitations p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ========================================
   문의 폼 섹션
======================================== */
.contact-section {
    margin-bottom: var(--spacing-lg);
}

.contact-subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

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

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    font-size: 1rem;
    font-family: inherit;
    border: 2px solid #E0E0E0;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    color: var(--text-primary);
    transition: border-color var(--transition-fast);
    outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
}

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

.contact-section .btn {
    margin-top: var(--spacing-sm);
    background: var(--primary-color);
    color: var(--text-light);
}

.contact-section .btn:hover,
.contact-section .btn:active {
    background: var(--primary-dark);
    transform: scale(1.02);
}

.contact-success {
    text-align: center;
    color: var(--primary-dark);
    background: var(--primary-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
    font-weight: 600;
    font-size: 0.95rem;
}

/* ========================================
   CTA 섹션
======================================== */
.cta-section {
    text-align: center;
    padding: var(--spacing-lg) 0;
}

/* ========================================
   푸터
======================================== */
.footer {
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* ========================================
   Watch 페이지 스타일
======================================== */
.watch-page {
    background: #1a1a2e;
    min-height: 100vh;
}

.watch-page .page {
    padding-bottom: var(--spacing-lg);
}

/* 헤더 */
.watch-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    color: var(--text-light);
}

.watch-header h1 {
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* 비디오 컨테이너 */
.video-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%; /* 16:9 비율 */
    background: #000;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
}

.video-container video,
.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* 상태 표시 바 (이모지 + 텍스트) */
.status-bar {
    display: flex;
    justify-content: space-around;
    background: rgba(255,255,255,0.1);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
}

.status-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    color: rgba(255,255,255,0.6);
    font-size: 0.85rem;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.status-item.active {
    color: var(--primary-light);
    background: rgba(76, 175, 80, 0.15);
}

.status-item.warning {
    color: var(--warning-color);
    background: rgba(255, 193, 7, 0.15);
}

.status-item.danger {
    color: var(--danger-color);
    background: rgba(244, 67, 54, 0.15);
}

.status-emoji {
    font-size: 1.8rem;
    line-height: 1;
}

.status-label {
    font-size: 0.75rem;
    font-weight: 600;
}

/* 상태 메시지 */
.status-message {
    text-align: center;
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-radius: var(--radius-sm);
}

.status-message.safe {
    color: var(--primary-light);
    background: rgba(76, 175, 80, 0.1);
}

.status-message.warning {
    color: var(--warning-color);
    background: rgba(255, 193, 7, 0.1);
}

.status-message.danger {
    color: var(--danger-color);
    background: rgba(244, 67, 54, 0.1);
}

/* 컨트롤 영역 */
.controls {
    padding: var(--spacing-md);
}

.controls .btn {
    margin-bottom: var(--spacing-md);
}

/* 테스트 컨트롤 */
.test-controls {
    background: rgba(255,255,255,0.05);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
}

.test-controls-title {
    color: var(--text-light);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.7;
}

.test-btn {
    background: rgba(255,255,255,0.1);
    color: var(--text-light);
    border: 1px solid rgba(255,255,255,0.2);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    cursor: pointer;
    margin-right: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.test-btn:hover, .test-btn.active {
    background: rgba(255,255,255,0.2);
}

/* 권한 경고 */
.permission-warning {
    display: none;
    background: var(--warning-color);
    color: var(--text-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.permission-warning.show {
    display: block;
}

/* Watch 페이지 푸터 */
.watch-page .footer {
    color: rgba(255,255,255,0.5);
}

.watch-page .footer a {
    color: var(--primary-light);
    text-decoration: none;
}

/* ========================================
   유틸리티 클래스
======================================== */
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-md { margin-bottom: var(--spacing-md); }
.text-center { text-align: center; }

/* ========================================
   언어 전환 버튼
======================================== */
.lang-switch-wrap {
    position: fixed;
    top: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 8px;
}

.lang-switch-label {
    background: rgba(255,255,255,0.95);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-lg);
    padding: 6px 10px;
    font-size: 0.75rem;
    font-weight: 700;
}

.lang-switch {
    background: rgba(255,255,255,0.95);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 7px 10px;
    border-radius: var(--radius-lg);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.lang-switch:hover {
    background: var(--primary-color);
    color: var(--text-light);
}

.watch-page .lang-switch {
    background: rgba(255,255,255,0.2);
    color: var(--text-light);
    border-color: rgba(255,255,255,0.5);
}

.watch-page .lang-switch-label {
    background: rgba(255,255,255,0.2);
    color: var(--text-light);
    border-color: rgba(255,255,255,0.5);
}

/* ========================================
   Watch 페이지 - 안내 섹션
======================================== */
.how-it-works,
.trust-info {
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) var(--spacing-md);
}

.section-title {
    color: var(--text-light);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-align: center;
}

/* 작동 방식 그리드 */
.info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    background: rgba(255,255,255,0.05);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
}

.info-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.info-text {
    color: var(--text-light);
}

.info-text strong {
    display: block;
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.info-text p {
    font-size: 0.75rem;
    opacity: 0.8;
    line-height: 1.4;
    margin: 0;
}

/* 안심 배지 */
.trust-badges {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(76, 175, 80, 0.2);
    color: var(--primary-light);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.trust-badge span:first-child {
    font-size: 1.2rem;
}

/* 감지 앱 아이콘 메뉴 */
.support-apps,
.app-detect-menu {
    background: rgba(255,255,255,0.05);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.support-apps-subtitle,
.app-detect-title {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-sm);
}

.watch-page .app-detect-title {
    color: rgba(255,255,255,0.7);
}

.app-icon-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.app-chip {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 700;
    background: #f3f3f3;
}

.watch-page .app-chip {
    background: rgba(255,255,255,0.08);
    color: #fff;
}

.app-chip-icon {
    width: 24px;
    height: 24px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    color: #fff;
}

.app-chip.youtube .app-chip-icon { background: #ff0000; }
.app-chip.instagram .app-chip-icon { background: #c13584; }
.app-chip.tiktok .app-chip-icon { background: #111; }
.app-chip.games .app-chip-icon { background: #3f51b5; }

/* ========================================
   센서 디버그 패널
======================================== */
.debug-panel {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.debug-title {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
}

.debug-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.debug-item {
    text-align: center;
}

.debug-label {
    display: block;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.65rem;
    margin-bottom: 2px;
}

.debug-value {
    display: block;
    color: var(--text-light);
    font-size: 0.85rem;
    font-weight: 600;
    font-family: monospace;
}

.debug-bar-container {
    position: relative;
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: visible;
    margin-bottom: 4px;
}

.debug-bar {
    height: 100%;
    width: 0%;
    background: var(--primary-color);
    border-radius: 4px;
    transition: width 0.1s ease, background 0.2s ease;
}

.debug-bar-threshold {
    position: absolute;
    top: -2px;
    width: 2px;
    height: 12px;
    background: #FF9800;
    border-radius: 1px;
}

.debug-bar-labels {
    display: flex;
    justify-content: space-between;
    color: rgba(255, 255, 255, 0.3);
    font-size: 0.6rem;
}

/* 반응형 - 작은 화면 */
@media (max-width: 360px) {
    .info-grid,
    .trust-badges,
    .app-icon-row {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   온보딩 모달
======================================== */
.onboarding-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    background: rgba(0, 0, 0, 0.85);
    align-items: center;
    justify-content: center;
}

.onboarding-modal.show {
    display: flex;
}

.onboarding-content {
    background: #1a1a2e;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 340px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255,255,255,0.1);
}

.onboarding-step {
    display: none;
}

.onboarding-step.active {
    display: block;
}

.onboarding-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.onboarding-step h2 {
    color: var(--text-light);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
}

.onboarding-step p {
    color: rgba(255,255,255,0.7);
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
}

.onboarding-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.onboarding-dot {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    background: rgba(255,255,255,0.2);
    transition: all var(--transition-fast);
}

.onboarding-dot.active {
    background: var(--primary-color);
    width: 24px;
    border-radius: 5px;
}

.onboarding-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

.onboarding-buttons .btn {
    min-width: 100px;
    font-size: 1rem;
}

/* ========================================
   가로 모드 (Landscape) 지원
======================================== */
@media (orientation: landscape) {
    .watch-page .page {
        max-width: 720px;
    }

    .video-container {
        max-width: 560px;
        margin-left: auto;
        margin-right: auto;
    }

    .status-bar {
        max-width: 560px;
        margin-left: auto;
        margin-right: auto;
    }

    .status-message {
        max-width: 560px;
        margin-left: auto;
        margin-right: auto;
    }
}

@media (orientation: landscape) and (max-height: 500px) {
    .how-it-works,
    .trust-info {
        display: none;
    }

    .watch-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .controls {
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

/* ========================================
   PIN 모달
======================================== */
.pin-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 99999;
    background: rgba(0, 0, 0, 0.85);
    align-items: center;
    justify-content: center;
}

.pin-modal.show {
    display: flex;
}

.pin-modal-content {
    background: #1a1a2e;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 340px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255,255,255,0.1);
}

.pin-modal-content h2 {
    color: var(--text-light);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
}

.pin-modal-content p {
    color: rgba(255,255,255,0.7);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: var(--spacing-lg);
}

.pin-input {
    width: 100%;
    padding: var(--spacing-md);
    font-size: 1.5rem;
    text-align: center;
    letter-spacing: 0.5em;
    background: rgba(255,255,255,0.1);
    border: 2px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-md);
    color: var(--text-light);
    outline: none;
    margin-bottom: var(--spacing-md);
    transition: border-color var(--transition-fast);
    -moz-appearance: textfield;
}

.pin-input::-webkit-outer-spin-button,
.pin-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.pin-input:focus {
    border-color: var(--primary-color);
}

.pin-input.error {
    border-color: var(--danger-color);
    animation: pin-shake 0.3s ease;
}

@keyframes pin-shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-8px); }
    75% { transform: translateX(8px); }
}

.pin-error-msg {
    color: var(--danger-color);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-md);
    min-height: 1.2em;
}

.pin-modal-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

.pin-modal-buttons .btn {
    min-width: 100px;
    font-size: 1rem;
}

.btn-pin-change {
    background: rgba(255,255,255,0.1);
    color: rgba(255,255,255,0.7);
    border: 1px solid rgba(255,255,255,0.2);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-top: var(--spacing-sm);
}

.btn-pin-change:hover {
    background: rgba(255,255,255,0.2);
    color: var(--text-light);
}