/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500;600&display=swap');

/* --- 変数 --- */
:root {
    --accent: #5b8dee;
    --accent-dark: #4a7cdc;
    --own-bubble: #5b8dee;
    --own-bubble-text: #fff;
    --other-bubble: #f0f2f5;
    --other-bubble-text: #1a1a2e;
    --sidebar-bg: #fafafa;
    --sidebar-border: #ebebeb;
    --header-bg: #fff;
    --body-bg: #fff;
    --text-primary: #1a1a2e;
    --text-muted: #9a9aaa;
    --input-bg: #f0f2f5;
    --radius-bubble: 18px;
    --font: 'Noto Sans JP', -apple-system, sans-serif;
}

/* --- リセット --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

body, html {
    height: 100%;
    width: 100%;
    overflow: hidden;
    font-family: var(--font);
    background: var(--body-bg);
    color: var(--text-primary);
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
}

/* --- アプリ全体 --- */
#app {
    display: flex;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* ===========================
   サイドバー
=========================== */
#sidebar {
    width: 260px;
    min-width: 260px;
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    display: flex;
    flex-direction: column;
    transition: transform 0.28s cubic-bezier(.4,0,.2,1);
    z-index: 2000;
}

.server-name {
    padding: 20px 18px 16px;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--text-primary);
    border-bottom: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.sidebar-scroll {
    flex: 1;
    overflow-y: auto;
    padding: 8px 0;
}

.sidebar-scroll::-webkit-scrollbar { width: 0; }

.sidebar-section {
    padding: 16px 18px 6px;
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    text-transform: uppercase;
}

#sidebar ul {
    list-style: none;
    padding: 0 8px;
}

#sidebar li {
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 6px;
    transition: background 0.15s;
    margin: 1px 0;
}

#sidebar li:hover { background: #eef0f5; }
#sidebar li.active {
    background: #e8edfc;
    color: var(--accent);
    font-weight: 500;
}

/* 未読バッジ */
.badge {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
    margin-left: auto;
    animation: badgePop 0.25s ease;
}

@keyframes badgePop {
    from { transform: scale(0); opacity: 0; }
    to   { transform: scale(1); opacity: 1; }
}

/* DM検索エリア */
#dm-search-area {
    display: flex;
    gap: 6px;
    padding: 4px 8px 8px;
}

#dm-search-area input {
    flex: 1;
    padding: 6px 10px;
    border-radius: 8px;
    border: 1px solid var(--sidebar-border);
    background: var(--input-bg);
    font-size: 0.8rem;
    font-family: var(--font);
    outline: none;
    color: var(--text-primary);
}

#dm-search-area button {
    padding: 6px 12px;
    border-radius: 8px;
    border: none;
    background: var(--accent);
    color: #fff;
    font-size: 0.78rem;
    font-family: var(--font);
    cursor: pointer;
    font-weight: 500;
    flex-shrink: 0;
    white-space: nowrap;
    transition: background 0.15s;
}

#dm-search-area button:hover { background: var(--accent-dark); }

/* ユーザー情報 */
#user-info-area {
    padding: 12px 14px;
    border-top: 1px solid var(--sidebar-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    flex-shrink: 0;
}

#user-name-block {
    display: flex;
    flex-direction: column;
    gap: 1px;
    overflow: hidden;
    flex: 1;
}

#user-display-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#user-userid-label {
    font-size: 0.72rem;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#user-info-area button {
    padding: 5px 12px;
    border-radius: 20px;
    border: 1px solid var(--sidebar-border);
    background: transparent;
    font-size: 0.75rem;
    font-family: var(--font);
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
    flex-shrink: 0;
}

#user-info-area button:hover {
    background: #f0f0f0;
    color: var(--text-primary);
}

/* 管理メニュー */
#admin-action-list li {
    color: #e05252 !important;
    font-weight: 500 !important;
}

/* ===========================
   メインチャットエリア
=========================== */
#chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: var(--body-bg);
}

/* ヘッダー */
#main-header {
    height: 54px;
    display: flex;
    align-items: center;
    padding: 0 16px;
    border-bottom: 1px solid var(--sidebar-border);
    background: var(--header-bg);
    flex-shrink: 0;
    gap: 10px;
}

#menu-btn {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-muted);
    padding: 4px;
    display: none;
    line-height: 1;
}

#display-channel-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.01em;
}

/* ===========================
   メッセージエリア
=========================== */
#messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

#messages::-webkit-scrollbar { width: 4px; }
#messages::-webkit-scrollbar-track { background: transparent; }
#messages::-webkit-scrollbar-thumb { background: #ddd; border-radius: 4px; }

/* 管理者ログパネル */
.log-line  { margin: 1px 0; }
.log-info  { color: #7ecfff; }
.log-warn  { color: #ffd166; }
.log-error { color: #ff6b6b; }
.date-separator {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 10px 0 6px;
    color: var(--text-muted);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.04em;
}

.date-separator::before,
.date-separator::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--sidebar-border);
}

/* --- メッセージ共通 --- */
.msg-item {
    display: flex;
    flex-direction: column;
    max-width: 72%;
    animation: fadeUp 0.18s ease;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* 相手のメッセージ（左） */
.msg-item.other { align-self: flex-start; align-items: flex-start; }

/* 自分のメッセージ（右） */
.msg-item.mine  { align-self: flex-end;   align-items: flex-end; }

.msg-header {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 3px;
    padding: 0 4px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.delete-btn {
    cursor: pointer;
    color: #ccc;
    font-size: 0.85rem;
    transition: color 0.15s;
    line-height: 1;
}
.delete-btn:hover { color: #e05252; }

.msg-content {
    padding: 8px 14px;
    border-radius: var(--radius-bubble);
    word-break: break-word;
    white-space: pre-wrap;
    font-size: 0.9rem;
    line-height: 1.5;
    width: fit-content;
    max-width: 100%;
    position: relative;
}

/* 相手の吹き出し */
.msg-item.other .msg-content {
    background: var(--other-bubble);
    color: var(--other-bubble-text);
    border-top-left-radius: 4px;
}

/* 自分の吹き出し */
.msg-item.mine .msg-content {
    background: var(--own-bubble);
    color: var(--own-bubble-text);
    border-top-right-radius: 4px;
}

.msg-footer {
    font-size: 0.62rem;
    color: var(--text-muted);
    margin-top: 3px;
    padding: 0 4px;
}

/* ===========================
   入力エリア
=========================== */
#input-area {
    padding: 10px 12px;
    border-top: 1px solid var(--sidebar-border);
    display: flex;
    align-items: flex-end;
    gap: 8px;
    background: var(--body-bg);
    flex-shrink: 0;
}

#message-input {
    flex: 1;
    padding: 9px 15px;
    border-radius: 22px;
    border: 1px solid var(--sidebar-border);
    background: var(--input-bg);
    font-size: 15px;
    font-family: var(--font);
    outline: none;
    resize: none;
    max-height: 120px;
    line-height: 1.45;
    color: var(--text-primary);
    transition: border-color 0.15s;
}

#message-input:focus {
    border-color: var(--accent);
}

#message-input::placeholder { color: var(--text-muted); }

#send-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    transition: background 0.15s, transform 0.1s;
}

#send-btn:hover { background: var(--accent-dark); }
#send-btn:active { transform: scale(0.94); }

/* ===========================
   ログイン・メンテナンス画面
=========================== */
#maintenance-overlay,
#auth-overlay {
    position: fixed;
    inset: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

#maintenance-overlay {
    background: rgba(10, 10, 20, 0.88);
    backdrop-filter: blur(6px);
    color: white;
}

#auth-overlay {
    background: #f5f6fa;
}

.auth-card {
    background: white;
    padding: 36px 30px;
    border-radius: 20px;
    width: 90%;
    max-width: 340px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    box-shadow: 0 8px 40px rgba(0,0,0,0.10);
}

.auth-card h2 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.01em;
    margin-bottom: 4px;
}

.auth-card input {
    padding: 11px 15px;
    border-radius: 12px;
    border: 1px solid var(--sidebar-border);
    background: var(--input-bg);
    font-size: 0.9rem;
    font-family: var(--font);
    outline: none;
    color: var(--text-primary);
    transition: border-color 0.15s;
}

.auth-card input:focus { border-color: var(--accent); }
.auth-card input::placeholder { color: var(--text-muted); }

.auth-card button {
    padding: 12px;
    border-radius: 12px;
    border: none;
    background: var(--accent);
    color: white;
    font-size: 0.9rem;
    font-family: var(--font);
    font-weight: 600;
    cursor: pointer;
    letter-spacing: 0.02em;
    transition: background 0.15s, transform 0.1s;
    margin-top: 4px;
}

.auth-card button:hover { background: var(--accent-dark); }
.auth-card button:active { transform: scale(0.98); }

.auth-card p {
    font-size: 0.78rem;
    color: var(--accent);
    text-align: center;
    cursor: pointer;
    font-weight: 500;
}

.auth-card p:hover { text-decoration: underline; }

/* ===========================
   レスポンシブ
=========================== */
@media (max-width: 768px) {
    #menu-btn { display: block; }

    #sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100%;
        transform: translateX(-100%);
    }

    #app.sidebar-open #sidebar { transform: translateX(0); }

    #sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.35);
        z-index: 1500;
        backdrop-filter: blur(2px);
    }

    #app.sidebar-open #sidebar-overlay { display: block; }

    .msg-item { max-width: 85%; }
}