/* ============================================
   shared-ui.css
   천상열차분야지도 XR 플랫폼 — 공통 UI 시스템
   모든 체험 모듈이 공유하는 디자인 토큰 및 컴포넌트
   ============================================ */

/* ===== 1. 디자인 토큰 ===== */
:root {
    /* 공통 크롬 색상 (골드 계열) */
    --sui-gold:          #ffd700;
    --sui-gold-dim:      #c9a962;
    --sui-gold-bright:   #ffe766;
    --sui-gold-bg:       rgba(255, 215, 0, 0.10);
    --sui-gold-bg-hover: rgba(255, 215, 0, 0.20);

    /* 배경 */
    --sui-bg-deep:   #0a0a1a;
    --sui-bg-panel:  #12122a;
    --sui-bg-glass:  rgba(10, 10, 26, 0.85);

    /* 텍스트 */
    --sui-text-primary: #ffffff;
    --sui-text-muted:   #a0a0b0;
    --sui-text-dim:     #606070;

    /* 보더 */
    --sui-border:       rgba(255, 215, 0, 0.20);
    --sui-border-panel: rgba(255, 215, 0, 0.12);
    --sui-border-hard:  #2a2a4a;

    /* 헤더 */
    --sui-header-height: 64px;
    --sui-header-z:      9900;

    /* 푸터 */
    --sui-footer-height: 28px;

    /* 모양 */
    --sui-radius-sm:   6px;
    --sui-radius-md:   10px;
    --sui-radius-pill: 999px;

    /* 폰트 */
    --sui-font: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
}


/* ===== 2. 통합 헤더 (.sui-header) ===== */

.sui-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--sui-header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    padding-top: env(safe-area-inset-top, 0px);
    padding-left: calc(20px + env(safe-area-inset-left, 0px));
    padding-right: calc(20px + env(safe-area-inset-right, 0px));
    background: var(--sui-bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--sui-border-panel);
    z-index: var(--sui-header-z);
    gap: 12px;
    box-sizing: border-box;
    font-family: var(--sui-font);
}

/* 타이틀 */
.sui-header-title {
    flex: 1;
    text-align: center;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--sui-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 0;
    padding: 0 8px;
    min-width: 0;
}

/* --- 변형: 그라데이션 페이드 (캔버스 몰입형 모듈) --- */
.sui-header--fade {
    background: linear-gradient(
        180deg,
        rgba(10, 10, 26, 0.92) 0%,
        rgba(10, 10, 26, 0.60) 60%,
        rgba(10, 10, 26, 0.00) 100%
    );
    border-bottom: none;
    height: 68px;
    align-items: flex-start;
    padding-top: calc(12px + env(safe-area-inset-top, 0px));
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

/* --- 변형: 자동 숨김 (캔버스 모듈) --- */
.sui-header--autohide {
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.sui-header--autohide.sui-header--hidden {
    opacity: 0;
    transform: translateY(-100%);
    pointer-events: none;
}


/* ===== 3. 통합 뒤로가기 (.sui-back-btn) ===== */

.sui-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 0 14px;
    height: 34px;
    background: var(--sui-gold-bg);
    border: 1px solid var(--sui-border);
    border-radius: var(--sui-radius-pill);
    color: var(--sui-gold);
    text-decoration: none;
    font-family: var(--sui-font);
    font-size: 0.82rem;
    font-weight: 500;
    white-space: nowrap;
    cursor: pointer;
    transition: background 0.25s, border-color 0.25s, color 0.25s;
    flex-shrink: 0;
    line-height: 1;
}

.sui-back-btn::before {
    content: '\2190'; /* ← */
    font-size: 1rem;
    line-height: 1;
}

.sui-back-btn:hover,
.sui-back-btn:active {
    background: var(--sui-gold-bg-hover);
    border-color: var(--sui-gold);
    color: var(--sui-gold-bright);
}

/* 초소형 모바일: 화살표만 표시 */
@media (max-width: 480px) {
    .sui-back-btn .sui-back-text {
        display: none;
    }
    .sui-back-btn {
        padding: 0 10px;
        min-width: 34px;
        min-height: 34px;
        justify-content: center;
    }
}


/* ===== 4. 언어 선택기 모바일 아이콘화 (.sui-lang) ===== */

/* 글로브 아이콘: 데스크톱에서는 숨김 */
.sui-lang .sui-globe {
    display: none;
    line-height: 1;
    color: #ffffff;
}

.sui-lang .sui-globe svg {
    display: block;
    width: 18px;
    height: 18px;
    stroke: #ffffff;
}

/* 데스크톱: 텍스트 표시 */
.sui-lang .current-lang {
    display: inline;
}

/* 모바일: 아이콘으로 전환 */
@media (max-width: 768px) {
    .sui-lang .sui-globe {
        display: inline-flex;
        align-items: center;
    }
    .sui-lang .current-lang {
        display: none;
    }
    .sui-lang .lang-btn {
        padding: 0 10px;
        min-width: 40px;
        min-height: 40px;
        justify-content: center;
        gap: 4px;
    }
    .sui-lang .lang-btn .dropdown-arrow {
        display: none;
    }
}

/* 언어 선택기 골드 테마 강제 (모든 모듈에서 통일) */
.sui-lang .lang-btn {
    background: var(--sui-gold-bg);
    color: var(--sui-gold);
    border: 1px solid var(--sui-border);
    border-radius: 20px;
    font-family: var(--sui-font);
    transition: background 0.25s, border-color 0.25s, color 0.25s;
}

.sui-lang .lang-btn:hover,
.sui-lang .lang-btn:active {
    background: var(--sui-gold-bg-hover);
    border-color: var(--sui-gold);
    color: var(--sui-gold-bright);
}

.sui-lang .language-dropdown {
    background: var(--sui-bg-panel);
    border: 1px solid var(--sui-border-hard);
    border-radius: 8px;
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.5);
}

.sui-lang .lang-option:hover,
.sui-lang .lang-option:active {
    background: var(--sui-gold-bg);
}

.sui-lang .lang-option.active {
    background: var(--sui-gold-bg-hover);
    color: var(--sui-gold);
}


/* ===== 5. 글래스 모피즘 유틸리티 ===== */

.sui-glass {
    background: rgba(10, 10, 26, 0.82);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--sui-border-panel);
    border-radius: var(--sui-radius-md);
}

.sui-glass--gold {
    border-color: var(--sui-border);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}


/* ===== 6. 컨트롤 버튼 유틸리티 ===== */

.sui-ctrl-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 18px;
    height: 36px;
    min-height: 36px;
    background: var(--sui-gold-bg);
    border: 1px solid var(--sui-border);
    border-radius: var(--sui-radius-pill);
    color: var(--sui-text-primary);
    font-family: var(--sui-font);
    font-size: 0.82rem;
    cursor: pointer;
    transition: background 0.25s, border-color 0.25s, color 0.25s;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    white-space: nowrap;
}

.sui-ctrl-btn:hover,
.sui-ctrl-btn:active {
    background: var(--sui-gold-bg-hover);
    border-color: var(--sui-gold);
    color: var(--sui-gold-bright);
}

.sui-ctrl-btn.active {
    background: rgba(255, 215, 0, 0.25);
    border-color: var(--sui-gold);
    color: var(--sui-gold);
}


/* ===== 7. 애니메이션 유틸리티 ===== */

@keyframes sui-fadeUp {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes sui-fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes sui-spin {
    to { transform: rotate(360deg); }
}

.sui-anim-fadeUp {
    animation: sui-fadeUp 0.35s ease forwards;
}

.sui-anim-fadeIn {
    animation: sui-fadeIn 0.35s ease forwards;
}


/* ===== 8. 로딩 화면 컴포넌트 ===== */

.sui-loading {
    position: fixed;
    inset: 0;
    background: radial-gradient(ellipse at center, #0f0f23 0%, #000000 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
    color: var(--sui-text-primary);
    font-family: var(--sui-font);
}

.sui-loading.hidden {
    opacity: 0;
    pointer-events: none;
}

.sui-loading__spinner {
    width: 48px;
    height: 48px;
    border: 3px solid rgba(255, 215, 0, 0.15);
    border-top-color: var(--sui-gold);
    border-radius: 50%;
    animation: sui-spin 1s linear infinite;
    margin-bottom: 20px;
}

.sui-loading__title {
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--sui-gold);
    margin-bottom: 8px;
}

.sui-loading__subtitle {
    font-size: 0.85rem;
    color: var(--sui-text-muted);
    margin-bottom: 24px;
}

.sui-loading__progress-track {
    width: 240px;
    height: 3px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 2px;
    overflow: hidden;
}

.sui-loading__progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--sui-gold-dim), var(--sui-gold));
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 2px;
}

.sui-loading__percent {
    font-size: 0.8rem;
    color: var(--sui-gold);
    margin-top: 10px;
    font-variant-numeric: tabular-nums;
}

.sui-loading__status {
    font-size: 0.8rem;
    color: var(--sui-text-muted);
    margin-top: 6px;
}


/* ===== 9. 통합 푸터 (.sui-footer) ===== */

.sui-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--sui-footer-height, 28px);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--sui-bg-glass);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-top: 1px solid var(--sui-border-panel);
    z-index: 9000;
    font-family: var(--sui-font);
    font-size: 10px;
    color: rgba(255, 255, 255, 0.35);
    pointer-events: none;
    padding: 0 10px;
    padding-bottom: env(safe-area-inset-bottom, 0px);
    box-sizing: border-box;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}

.sui-footer a {
    color: rgba(255, 255, 255, 0.45);
    text-decoration: none;
    pointer-events: auto;
}

.sui-footer a:hover {
    color: rgba(255, 255, 255, 0.65);
}


/* ===== 10. 모바일 반응형 보정 ===== */

@media (max-width: 768px) {
    :root {
        --sui-header-height: 56px;
    }

    .sui-header {
        padding: 0 14px;
        padding-top: env(safe-area-inset-top, 0px);
        padding-left: calc(14px + env(safe-area-inset-left, 0px));
        padding-right: calc(14px + env(safe-area-inset-right, 0px));
    }

    .sui-header--fade {
        height: 60px;
        padding-top: calc(10px + env(safe-area-inset-top, 0px));
    }

    .sui-header-title {
        font-size: 0.85rem;
    }

    .sui-footer {
        font-size: 9px;
        padding: 0 8px;
    }
}