/* ================================
   Deep Sea Chat – 完全統合版 CSS
================================ */

/* 深海グラデーション背景 */
body {
    margin: 0;
    padding: 0;
    background: linear-gradient(to bottom, #003a5c, #001a33 70%);
    font-family: "Noto Sans JP", sans-serif;
    color: #e8f7ff;
    overflow: hidden;
}

/* アクセシビリティ用（非表示） */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* バブル背景レイヤー */
.bubble-layer {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    will-change: transform;
}

.layer1 {
    background: radial-gradient(circle at 20% 80%, rgba(255,255,255,0.15), transparent 40%);
    animation: float1 18s infinite ease-in-out;
}

.layer2 {
    background: radial-gradient(circle at 70% 20%, rgba(255,255,255,0.12), transparent 40%);
    animation: float2 22s infinite ease-in-out;
}

.layer3 {
    background: radial-gradient(circle at 40% 50%, rgba(255,255,255,0.10), transparent 40%);
    animation: float3 26s infinite ease-in-out;
}

@keyframes float1 { 0% { transform: translateY(40px); } 100% { transform: translateY(-80px); } }
@keyframes float2 { 0% { transform: translateY(60px); } 100% { transform: translateY(-100px); } }
@keyframes float3 { 0% { transform: translateY(50px); } 100% { transform: translateY(-90px); } }

/* 全体レイアウト */
.chat-app {
    display: flex;
    height: 100vh;
    position: relative;
    z-index: 2;
}

/* 左：サイドバー */
.sidebar {
    width: 260px;
    background: rgba(255,255,255,0.06);
    backdrop-filter: blur(12px);
    border-right: 1px solid rgba(255,255,255,0.1);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* 真珠オーブ */
.orb-container {
    display: flex;
    justify-content: center;
    margin-top: 10px;
}

.orb {
    position: relative;
    width: 90px;
    height: 90px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, #ffffff, #a8eaff 40%, #005f99 90%);
    box-shadow:
        0 0 20px rgba(0, 200, 255, 0.4),
        inset 0 0 20px rgba(255, 255, 255, 0.6);
    animation: orbPulse 4s ease-in-out infinite,
               orbGlow 6s ease-in-out infinite;
}

@keyframes orbPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.06); }
}

@keyframes orbGlow {
    0%, 100% {
        box-shadow:
            0 0 20px rgba(0, 200, 255, 0.4),
            inset 0 0 20px rgba(255, 255, 255, 0.6);
    }
    50% {
        box-shadow:
            0 0 40px rgba(0, 200, 255, 0.7),
            inset 0 0 30px rgba(255, 255, 255, 0.8);
    }
}

/* 会話時の光 */
.orb.active {
    animation: orbSpeak 1.2s ease;
}

@keyframes orbSpeak {
    0% { transform: scale(1); box-shadow: 0 0 20px rgba(0,200,255,0.4); }
    50% { transform: scale(1.12); box-shadow: 0 0 60px rgba(0,200,255,0.9); }
    100% { transform: scale(1); box-shadow: 0 0 20px rgba(0,200,255,0.4); }
}

/* 波紋エフェクト */
.orb::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: radial-gradient(
        circle,
        rgba(0, 200, 255, 0.4) 0%,
        rgba(0, 200, 255, 0.15) 40%,
        rgba(0, 200, 255, 0) 70%
    );
    opacity: 0;
    transform: scale(0.6);
    pointer-events: none;
}

.orb.ripple::after {
    animation: rippleWave 1.2s ease-out;
}

@keyframes rippleWave {
    0% { opacity: 0.6; transform: scale(0.6); filter: blur(2px); }
    70% { opacity: 0.25; transform: scale(1.6); filter: blur(4px); }
    100% { opacity: 0; transform: scale(2.2); filter: blur(6px); }
}

/* typing 中の淡い点滅 */
.orb.typing-glow {
    animation: orbTyping 1.2s infinite ease-in-out;
}

@keyframes orbTyping {
    0%   { box-shadow: 0 0 20px rgba(0,200,255,0.3); }
    50%  { box-shadow: 0 0 40px rgba(0,200,255,0.6); }
    100% { box-shadow: 0 0 20px rgba(0,200,255,0.3); }
}

/* スレッド一覧 */
.chat-list {
    list-style: none;
    padding: 0;
    margin: 0;
    overflow-y: auto;
    flex: 1;
}

.chat-list:empty {
    padding-top: 8px;
}

.chat-list li {
    padding: 10px;
    margin-bottom: 8px;
    background: rgba(255,255,255,0.08);
    border-radius: 8px;
    cursor: pointer;
    transition: 0.2s;
}

.chat-list li:hover {
    background: rgba(255,255,255,0.15);
}

.active-thread {
    background: rgba(80,180,255,0.25) !important;
    border-left: 3px solid #4dd0ff;
}

.thread-delete {
    float: right;
    color: #ff6b6b;
    cursor: pointer;
    margin-left: 8px;
    transition: 0.2s;
}

.thread-delete:hover {
    transform: scale(1.2);
}

.thread-edit-input {
    width: 100%;
    padding: 6px;
    border-radius: 6px;
    border: none;
    outline: none;
    background: rgba(255,255,255,0.15);
    color: #e8f7ff;
}

/* 右：チャット画面 */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 16px;
}

.chat-main h1 {
    margin: 0;
}

.messages {
    flex: 1;
    overflow-y: auto;
    padding-right: 6px;
}

/* メッセージバブル */
.message {
    max-width: 70%;
    padding: 10px 14px;
    margin-bottom: 12px;
    border-radius: 12px;
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(6px);
}

/* ユーザー側 */
.message.user {
    margin-left: auto;
    background: rgba(80,180,255,0.25);
    animation: waveUser 0.6s ease-out;
}

/* AI側 */
.message.ai {
    background: rgba(0, 180, 255, 0.18);
    border-left: 3px solid #4dd0ff;
    box-shadow: 0 0 12px rgba(0, 180, 255, 0.4);
    animation: waveAI 0.6s ease-out;
}

@keyframes waveAI {
    0% { opacity: 0; transform: translateX(-40px) translateY(6px); filter: blur(4px); }
    60% { opacity: 1; transform: translateX(4px) translateY(0); filter: blur(0); }
    100% { transform: translateX(0); }
}

@keyframes waveUser {
    0% { opacity: 0; transform: translateX(40px) translateY(6px); filter: blur(4px); }
    60% { opacity: 1; transform: translateX(-4px) translateY(0); filter: blur(0); }
    100% { transform: translateX(0); }
}

/* typing バブル */
.typing {
    max-width: 60%;
    padding: 10px 14px;
    margin-bottom: 12px;
    border-radius: 12px;
    background: rgba(0, 180, 255, 0.12);
    backdrop-filter: blur(6px);
    color: #aeeaff;
    font-size: 18px;
    letter-spacing: 2px;
    animation: typingWave 1.2s infinite ease-in-out;
}

@keyframes typingWave {
    0%   { opacity: 0.4; transform: translateX(-4px); }
    50%  { opacity: 1;   transform: translateX(4px); }
    100% { opacity: 0.4; transform: translateX(-4px); }
}

/* 入力欄 */
.input-area {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

#chat-input {
    flex: 1;
    padding: 12px;
    border-radius: 10px;
    border: none;
    outline: none;
    background: rgba(255,255,255,0.12);
    color: #e8f7ff;
}

#send-btn {
    padding: 12px 18px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, #00c6ff, #0072ff);
    color: white;
    cursor: pointer;
}

/* フォーカスリング */
button:focus-visible,
input:focus-visible {
    outline: 2px solid rgba(0, 200, 255, 0.8);
    outline-offset: 3px;
}