/**
 * @file layout.css
 * @description 레이아웃, 그리드, 사이드바, 탭 네비게이션
 */

/* ========== 메인 레이아웃 ========== */
.main-layout {
    display: flex;
    width: 100%;
    min-height: 100vh;
    background-color: var(--bg);
}

/* ========== 사이드바 ========== */
.sidebar {
    width: 70px;
    background: var(--card-bg);
    padding: 1.5rem 0.5rem;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 2rem;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow: visible;
    z-index: 100;
    justify-content: flex-start;
}

/* 사이드바 로고 - 항상 고정 */
.sidebar-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 0;
    margin-top: 0.5rem;
    margin-bottom: 0;
    position: relative;
}

.sidebar-logo img {
    width: 60px;
    height: auto;
}

/* 로고 툴팁 */
.sidebar-logo-tooltip {
    position: absolute;
    left: 70px;
    top: 50%;
    transform: translateY(-50%);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    background: transparent;
    padding: 0.75rem 1rem 0.75rem 0;
    transition: opacity 0.3s ease, visibility 0.3s ease, color 0.3s ease;
    pointer-events: none;
    z-index: 1000;
    color: var(--text);
    font-size: 0.95rem;
    font-weight: 500;
}

/* ========== 배경음악 컨트롤 ========== */
.music-control {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0;
    margin-top: auto;
    margin-bottom: 1rem;
    gap: 0;
    position: relative;
    order: 2;
}

.music-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    padding: 0.75rem;
    border: none;
    background: transparent;
    color: var(--text-light);
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    z-index: 2;
}

.music-toggle-btn:hover {
    background: var(--primary-hover);
    color: white;
    transform: scale(1.05);
}

.music-toggle-btn.playing {
    color: var(--primary);
    background: rgba(var(--primary-rgb, 99, 102, 241), 0.1);
}

.music-toggle-btn.playing:hover {
    color: white;
    background: var(--primary-hover);
}

/* 재생 중 사운드 웨이브 애니메이션 */
.music-toggle-btn.playing .sound-waves {
    animation: soundWave 1.5s ease-in-out infinite;
}

@keyframes soundWave {
    0%, 100% {
        opacity: 0.6;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.1);
    }
}

.music-icon {
    width: 28px;
    height: 28px;
    transition: all 0.3s ease;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.1));
}


/* 음량 조절 컨트롤 */
.music-volume-control {
    position: absolute;
    left: 63px;
    top: 50%;
    transform: translateY(-50%) translateX(-10px);
    display: flex;
    align-items: center;
    
    gap: 0.75rem;
    background: var(--card-bg);
    padding:0.5rem 1rem 0.5rem 1rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 3;
    pointer-events: none;
    white-space: nowrap;
}

/* 호버 시 볼륨 컨트롤 표시 */
.music-control:hover .music-volume-control,
.music-volume-control:hover {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0);
    pointer-events: auto;
}


.music-volume-slider {
    width:70px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.music-volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
}

.music-volume-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 8px var(--primary);
}

.music-volume-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--primary);
    border-radius: 50%;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.music-volume-slider::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 8px var(--primary);
}

.volume-percentage {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text);
    min-width: 35px;
    text-align: right;
}

/* 다크모드 음악 컨트롤 */
body.dark-mode .music-toggle-btn {
    color: var(--text-light);
}

body.dark-mode .music-toggle-btn:hover {
    background: var(--primary-hover);
    color: #1a1a1a;
}

body.dark-mode .music-toggle-btn.playing {
    color: var(--primary);
    background: rgba(var(--primary-rgb, 99, 102, 241), 0.15);
}

body.dark-mode .music-toggle-btn.playing:hover {
    color: #1a1a1a;
}

body.dark-mode .music-volume-control {
    background: var(--card-bg);
    border: 1px solid var(--border);
}

.sidebar #auth-section {
    padding: 0;
    box-shadow: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    margin-bottom: 1rem;
    display: none;
}

.sidebar #user-info {
    display: none;
}

/* ========== 탭 네비게이션 ========== */
.tabs {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    position: relative;
    margin-top: auto;
    margin-bottom: auto;
    order: 1;
}

.tab-button {
    display: flex;
    align-items: center;
    width: 50px;
    padding: 0.75rem;
    border: none;
    background: transparent;
    color: var(--text-light);
    font-size: 1rem;
    font-weight: 500;
    text-align: left;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: color 0.3s ease;
    position: relative;
    justify-content: center;
    overflow: visible;
}

/* 호버 시 배경 */
.tab-button::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 200px;
    height: 100%;
    background: transparent;
    border-radius: 0.5rem;
    transition: background 0.2s ease;
    z-index: 998;
    pointer-events: none;
}

.tab-button:hover::after {
    background: var(--primary-hover);
}

.tab-button svg {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    min-width: 20px;
    min-height: 20px;
    position: relative;
    z-index: 1001;
    transition: color 0.3s ease, stroke 0.3s ease;
}

.tab-button span {
    position: absolute;
    left: 70px;
    margin-left: 0;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    background: transparent;
    padding: 0.75rem 1rem 0.75rem 0;
    transition: opacity 0.3s ease, visibility 0.3s ease, color 0.3s ease;
    pointer-events: none;
    z-index: 1000;
}

.tab-button:hover {
    background: transparent;
    color: white;
}

.tab-button:hover svg {
    color: white;
    stroke: white;
}

.tab-button:hover span {
    color: white;
}

/* 사이드바 호버 시 모든 툴팁 표시 */
.sidebar:hover .tab-button span {
    opacity: 1;
    visibility: visible;
}

.sidebar:hover .sidebar-logo-tooltip {
    opacity: 1;
    visibility: visible;
}

.sidebar:hover .music-volume-control,
.music-volume-control:hover {
    opacity: 1;
    visibility: visible;
    transform: translateY(-50%) translateX(0);
    pointer-events: auto;
}

/* 활성 탭 배경 */
.tab-button.active::after {
    background: var(--primary);
    width: 50px;
}

.tab-button.active {
    background: transparent;
    color: white;
    box-shadow: none;
}

.tab-button.active:hover::after {
    width: 200px;
    background: var(--primary-hover);
}

.tab-button.active:hover {
    color: white;
}

.tab-button.active span {
    color: var(--text);
}

.tab-button.active:hover span {
    color: white;
}

/* ========== 다크모드 탭 스타일 ========== */
body.dark-mode .tab-button {
    color: var(--text-light);
}

body.dark-mode .tab-button svg {
    color: var(--text-light);
    stroke: var(--text-light);
}

body.dark-mode .tab-button:hover {
    color: #1a1a1a;
}

body.dark-mode .tab-button:hover svg {
    color: #1a1a1a;
    stroke: #1a1a1a;
}

body.dark-mode .tab-button:hover span {
    color: #1a1a1a;
}

body.dark-mode .tab-button.active {
    color: #1a1a1a;
}

body.dark-mode .tab-button.active svg {
    color: #1a1a1a;
    stroke: #1a1a1a;
}

body.dark-mode .tab-button.active span {
    color: var(--text-light);
}

body.dark-mode .tab-button.active:hover {
    color: #1a1a1a;
}

body.dark-mode .tab-button.active:hover svg {
    color: #1a1a1a;
    stroke: #1a1a1a;
}

body.dark-mode .tab-button.active:hover span {
    color: #1a1a1a;
}

/* ========== 콘텐츠 영역 ========== */
.content-area {
    flex-grow: 1;
    padding: 2rem;
    max-width: calc(100% - 70px);
    overflow-y: auto;
    transition: max-width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* 헤더 로그인 섹션 */
#auth-section-header {
    position: fixed;
    top: 2rem;
    right: 3rem;
    z-index: 50;
    display: flex;
    align-items: center;
    gap: 1rem;
}

#auth-section-header button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    white-space: nowrap;
}

#auth-section-header button:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(44, 44, 44, 0.3);
}

#auth-section-header button svg {
    flex-shrink: 0;
}

#auth-section-header #user-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* 다크모드 로그인 버튼 */
body.dark-mode #auth-section-header button {
    background: var(--primary);
    color: #1a1a1a;
}

body.dark-mode #auth-section-header button:hover {
    background: var(--primary-hover);
    color: #1a1a1a;
}

/* 쪽지함 탭일 때 content-area 스타일 오버라이드 */
.content-area:has(#messages-tab-content.active) {
    padding: 0;
    overflow: hidden;
}

#current-tab-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--text);
    text-align: center;
}

/* 기존 컨테이너 (더 이상 사용하지 않음) */
.container {
    max-width: 100%;
    margin: 0;
    padding: 0;
}

/* ========== 반응형 디자인 ========== */
@media (max-width: 768px) {
    .main-layout {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border);
        padding: 1rem;
    }

    .sidebar-logo img {
        width: 40px;
    }

    .music-control {
        margin-bottom: 0.5rem;
    }

    .music-toggle-btn {
        width: 40px;
        height: 40px;
        padding: 0.5rem;
    }

    .music-icon {
        width: 24px;
        height: 24px;
    }

    .music-volume-control {
        position: fixed;
        left: 50%;
        top: auto;
        bottom: 80px;
        transform: translateX(-50%) translateY(10px);
        flex-direction: column;
        padding: 1rem;
    }

    .music-control:hover .music-volume-control {
        transform: translateX(-50%) translateY(0);
    }

    .music-volume-slider {
        width: 150px;
    }

    .tabs {
        flex-direction: row;
        justify-content: space-around;
    }

    .tab-button {
        width: auto;
        text-align: center;
        padding: 0.5rem 0.75rem;
        justify-content: center;
    }

    .tab-button span {
        position: static;
        opacity: 0;
        visibility: hidden;
        display: none;
    }

    .content-area {
        max-width: 100%;
        padding: 1rem;
    }

    #current-tab-title {
        font-size: 2rem;
        margin-bottom: 1.5rem;
    }
}