@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&display=swap');

:root {
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #8b5cf6;
    --accent-hover: #7c3aed;
    --accent-glow: rgba(139, 92, 246, 0.5);
    --danger: #ef4444;
    
    /* Select Colors */
    --select-bg: rgba(20, 20, 30, 0.6);
    --select-border: rgba(139, 92, 246, 0.3);
    --select-text: #e2e8f0;
    --select-opt-bg: #1e1e2f;
    --select-opt-text: white;
}

[data-theme="light"] {
    --bg-gradient: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
    --card-bg: rgba(255, 255, 255, 0.7);
    --card-border: rgba(0, 0, 0, 0.15);
    --text-main: #0f172a;
    --text-muted: #475569;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --accent-glow: rgba(99, 102, 241, 0.3);
    --danger: #ef4444;
    
    /* Select Colors */
    --select-bg: rgba(255, 255, 255, 0.6);
    --select-border: rgba(99, 102, 241, 0.4);
    --select-text: #0f172a;
    --select-opt-bg: #ffffff;
    --select-opt-text: #0f172a;
}

body {
    margin: 0;
    font-family: 'Outfit', sans-serif;
    background: var(--bg-gradient);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(to right, #a78bfa, #f472b6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
}

.nav-links {
    display: flex;
    align-items: center;
}

/* ===========================================================
   네비게이션 바
   - 데스크탑(≥821px): 한 줄 인라인 메뉴 (기본 .nav-links flex row)
   - 모바일(≤820px): 우측 슬라이드 드로어 + 햄버거
   HTML 자식 순서: drawer-head → 메뉴 a들 → user-card → 로그인/아웃 → settings-group
   =========================================================== */

/* === 공통 === */
.nav-icon { display: none; }          /* 아이콘은 모바일에서만 노출 */
.nav-drawer-head { display: none; }   /* 드로어 헤더는 모바일에서만 */
.nav-section-label { display: none; } /* 섹션 라벨도 모바일에서만 */
.nav-pts-mobile { display: none; }    /* 헤더 우측 미니 포인트 칩도 모바일에서만 */

/* 햄버거 버튼 */
.nav-toggle {
    display: none;
    width: 42px;
    height: 38px;
    padding: 0;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 8px;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    margin-left: 0.5rem;
}
.nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-main);
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.2s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 백드롭 */
.nav-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s;
}
.nav-backdrop.open { opacity: 1; visibility: visible; }

/* === 데스크탑(기본) 레이아웃 === */
.nav-links a.nav-item {
    color: var(--text-main);
    text-decoration: none;
    margin-left: 1.5rem;
    font-weight: 600;
    transition: color 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}
.nav-links a.nav-item:hover { color: var(--accent); }
.nav-links a.nav-logout { color: #ef4444; }

/* 유저 카드: 데스크탑은 메뉴 우측에 인라인 알약 */
.nav-user-card {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-left: 1rem;
    padding: 0.2rem 0.6rem 0.2rem 0.2rem;
    background: rgba(99, 102, 241, 0.10);
    border: 1px solid rgba(99, 102, 241, 0.25);
    border-radius: 999px;
}
.nav-user-avatar {
    width: 28px; height: 28px;
    border-radius: 50%;
    background: linear-gradient(135deg, #a78bfa, #f472b6);
    color: white;
    font-weight: 800;
    font-size: 0.85rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.nav-user-info { display: inline-flex; align-items: center; gap: 0.4rem; }
.nav-user-name { font-weight: 700; font-size: 0.88rem; color: var(--text-main); }
.nav-user-role { display: none; }     /* 데스크탑은 이름만 */
.nav-user-points {
    background: rgba(245,158,11,0.18);
    border: 1px solid rgba(245,158,11,0.45);
    color: #fbbf24;
    padding: 0.18rem 0.55rem;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
}

/* 설정 그룹: 데스크탑은 인라인 + 좌측 구분선 */
.nav-settings-group {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-left: 1rem;
    border-left: 1px solid rgba(255,255,255,0.2);
    padding-left: 1rem;
}
.nav-lang {
    padding: 0.4rem 0.5rem;
    font-size: 0.9rem;
    background: rgba(255,255,255,0.1);
    border-radius: 6px;
    border: 1px solid rgba(255,255,255,0.1);
    color: var(--text-main);
    width: auto;
    appearance: auto;
    background-image: none;
    box-shadow: none;
}

/* === 모바일(≤820px): 우측 슬라이드 드로어 === */
@media (max-width: 820px) {
    /* ★ backdrop-filter 가 켜져 있으면 헤더가 fixed 자식의 포함 블록이 되어
       드로어/백드롭이 헤더 박스 안에 갇혀버림 → 모바일에선 끄고 반투명만 사용 */
    header {
        padding: 0.7rem 0.9rem;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        background: rgba(15, 23, 42, 0.96);
    }
    [data-theme="light"] header { background: rgba(241, 245, 249, 0.96); }
    .logo { font-size: 1.25rem; }
    .nav-toggle { display: flex; }
    body.nav-open { overflow: hidden; }

    /* 헤더 우측 미니 포인트 칩 */
    .nav-pts-mobile {
        display: inline-block;
        margin-left: auto;
        background: rgba(245,158,11,0.18);
        border: 1px solid rgba(245,158,11,0.45);
        color: #fbbf24;
        padding: 0.3rem 0.7rem;
        border-radius: 999px;
        font-size: 0.82rem;
        font-weight: 700;
        text-decoration: none;
        white-space: nowrap;
    }

    /* 드로어 컨테이너 */
    .nav-links {
        position: fixed;
        top: 0; right: 0; bottom: 0;
        width: min(86vw, 340px);
        background: rgba(15, 23, 42, 0.98);
        border-left: 1px solid var(--card-border);
        padding: 0 0 1rem;
        backdrop-filter: blur(14px);
        box-shadow: -18px 0 40px rgba(0, 0, 0, 0.5);
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        overflow-y: auto;
        overflow-x: hidden;
        z-index: 1001;
        transform: translateX(100%);
        transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
        display: flex;
    }
    [data-theme="light"] .nav-links { background: rgba(255, 255, 255, 0.98); }
    .nav-links.open { transform: translateX(0); }

    /* HTML 순서: drawer-head → 메뉴 → user-card → 로그아웃 → settings
       모바일 드로어 시각 순서: drawer-head → user-card → 메뉴 → settings → 로그아웃 */
    .nav-drawer-head    { order: 0; }
    .nav-user-card      { order: 1; }
    .nav-links a.nav-item:not(.nav-logout) { order: 2; }
    .nav-settings-group { order: 3; }
    .nav-links a.nav-logout                { order: 4; }

    /* 1) 드로어 헤더 */
    .nav-drawer-head {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 1rem 1.1rem 0.7rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .nav-brand {
        font-size: 1rem;
        font-weight: 800;
        background: linear-gradient(to right, #a78bfa, #f472b6);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }
    .nav-close {
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid rgba(255, 255, 255, 0.12);
        color: var(--text-main);
        width: 34px; height: 34px;
        padding: 0; border-radius: 8px;
        cursor: pointer; font-size: 1rem;
        display: inline-flex; align-items: center; justify-content: center;
    }

    /* 2) 유저 카드: 모바일은 크고 화려한 카드 */
    .nav-user-card {
        display: flex;
        align-items: center;
        gap: 0.7rem;
        margin: 0.8rem 1rem 0.5rem;
        padding: 0.85rem 1rem;
        background: linear-gradient(135deg, rgba(139, 92, 246, 0.22), rgba(99, 102, 241, 0.12));
        border: 1px solid rgba(139, 92, 246, 0.35);
        border-radius: 14px;
    }
    .nav-user-avatar { width: 40px; height: 40px; font-size: 1.05rem; }
    .nav-user-info {
        flex: 1; min-width: 0;
        display: flex; flex-direction: column; gap: 0.1rem;
        align-items: flex-start;
    }
    .nav-user-name {
        font-size: 0.95rem;
        overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
        max-width: 100%;
    }
    .nav-user-role {
        display: block;
        font-size: 0.72rem;
        color: var(--text-muted);
        text-transform: uppercase;
        letter-spacing: 0.05em;
    }
    .nav-user-points {
        font-size: 0.78rem;
        padding: 0.3rem 0.6rem;
        flex-shrink: 0;
    }

    /* 3) 메뉴 항목 */
    .nav-links a.nav-item {
        display: flex;
        align-items: center;
        gap: 0.7rem;
        margin: 0 0.7rem;
        padding: 0.75rem 0.7rem;
        border-radius: 10px;
        font-weight: 600;
        color: var(--text-main);
    }
    .nav-links a.nav-item:hover { background: rgba(99, 102, 241, 0.18); color: var(--text-main); }
    .nav-icon {
        display: inline-flex;
        width: 24px;
        font-size: 1.05rem;
        justify-content: center;
    }

    /* 4) 설정 그룹 */
    .nav-settings-group {
        display: flex;
        align-items: center;
        gap: 0.5rem;
        margin: 0.6rem 1rem 0;
        padding: 0.8rem 0 0;
        border-left: none;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .nav-section-label {
        display: block;
        font-size: 0.7rem;
        text-transform: uppercase;
        letter-spacing: 0.08em;
        color: var(--text-muted);
        font-weight: 700;
        flex: 1;
    }
    .nav-lang {
        padding: 0.5rem 2.2rem 0.5rem 0.7rem;
        font-size: 0.85rem;
        background: rgba(255, 255, 255, 0.08);
        border-radius: 8px;
        border: 1px solid rgba(255, 255, 255, 0.12);
        color: var(--text-main);
        appearance: auto;
        background-image: none;
        box-shadow: none;
        width: auto;
    }
    .v3-settings-wrap { flex-shrink: 0; }

    /* 5) 로그아웃 */
    .nav-links a.nav-logout {
        margin: 0.6rem 0.7rem 0;
        padding: 0.75rem 0.7rem;
        border-radius: 10px;
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        padding-top: 1rem;
        color: #ef4444 !important;
    }
    .nav-links a.nav-logout:hover { background: rgba(239, 68, 68, 0.12); }

    /* 설정 팝오버: 드로어 안에선 좌측으로 펴짐 */
    #v3-settings-pop { right: 0; left: auto; top: calc(100% + 6px); max-width: 240px; }
}

main {
    flex: 1;
    padding: 2rem;
    max-width: 1800px;
    margin: 0 auto;
    width: 96%;
    box-sizing: border-box;
}

/* 헤더 설정 팝오버 (뷰어 버전 + 테마) */
.hdr-gear {
    padding: 0.4rem 0.7rem;
    font-size: 1rem;
    background: rgba(255,255,255,0.1);
    border-radius: 6px;
    width: auto;
    border: 1px solid rgba(255,255,255,0.1);
    color: var(--text-main);
    cursor: pointer;
    line-height: 1;
}
.hdr-gear:hover { background: rgba(255,255,255,0.2); }
.v3-settings-wrap { position: relative; display: inline-flex; }
#v3-settings-pop {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    width: 250px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1rem;
    box-shadow: 0 12px 30px rgba(0,0,0,0.35);
    z-index: 10000;
    display: none;
    backdrop-filter: blur(12px);
}
#v3-settings-pop.open { display: block; }
.v3-set-section { margin-bottom: 1rem; }
.v3-set-section:last-child { margin-bottom: 0; }
.v3-set-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    font-weight: bold;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.v3-seg { display: flex; gap: 0.4rem; }
.v3-seg button {
    flex: 1;
    padding: 0.45rem 0.2rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--card-border);
    color: var(--text-main);
    transition: all 0.15s ease;
    width: auto;
}
.v3-seg button:hover { background: rgba(255,255,255,0.12); }
.v3-seg button.active {
    background: rgba(99,102,241,0.28);
    border-color: rgba(99,102,241,0.6);
    color: #c7d2fe;
    font-weight: bold;
}
.v3-set-hint { font-size: 0.7rem; color: var(--text-muted); margin-top: 0.4rem; }

/* Glassmorphism Cards */
.glass-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2rem;
    backdrop-filter: blur(12px);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px 0 var(--accent-glow);
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-muted);
}

input[type="text"], input[type="password"], input[type="file"] {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--card-border);
    background: rgba(0, 0, 0, 0.2);
    color: var(--text-main);
    font-family: 'Outfit', sans-serif;
    box-sizing: border-box;
    transition: border-color 0.3s ease;
}

input[type="text"]:focus, input[type="password"]:focus {
    outline: none;
    border-color: var(--accent);
}

/* Premium Select Styling */
select {
    width: 100%;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%238b5cf6' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1.2rem;
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    background-color: var(--select-bg);
    border: 1px solid var(--select-border);
    color: var(--select-text);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    font-weight: 500;
    backdrop-filter: blur(10px);
    font-family: 'Outfit', sans-serif;
    box-sizing: border-box;
}

select:hover {
    border-color: var(--accent);
    box-shadow: 0 0 15px var(--accent-glow), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow), 0 0 20px var(--accent-glow);
}

select option {
    background-color: var(--select-opt-bg);
    color: var(--select-opt-text);
    padding: 12px;
    font-weight: 500;
}

button {
    background: var(--accent);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-family: 'Outfit', sans-serif;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.2s ease;
    width: auto;
}

button:hover {
    background: var(--accent-hover);
    transform: scale(1.05);
}

button.danger {
    background: var(--danger);
}
button.danger:hover {
    background: #dc2626;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.5rem;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--card-border);
}

th {
    font-weight: 600;
    color: var(--text-muted);
}

tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* Category Sections */
.category-section {
    margin-bottom: 3rem;
}

.category-title {
    font-size: 1.8rem;
    font-weight: 800;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent);
    display: inline-block;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* Viewer */
#osmd-container {
    background: #ffffff; /* Sheet music needs white background */
    border-radius: 16px;
    padding: 2rem;
    overflow-x: auto;
    box-shadow: 0 8px 32px 0 rgba(0,0,0,0.5);
}

/* Loader */
.loader-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(5px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    visibility: hidden;
    opacity: 0;
    transition: visibility 0s, opacity 0.3s linear;
}
.loader-overlay.active {
    visibility: visible;
    opacity: 1;
}

.spinner {
    border: 4px solid rgba(255,255,255,0.1);
    border-left-color: var(--accent);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}