/* style.css - iOS 26 Liquid Design */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600&display=swap');

:root {
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --accent-color: #00d2ff;
    --text-main: #ffffff;
    --text-sub: #a0a0a0;
    --danger-color: #ff4757;
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 50%, #0ea5e9 100%);
    background-size: 200% 200%;
    animation: gradientMove 15s ease infinite;
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
}

@keyframes gradientMove {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Glassmorphism Utilities */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--glass-shadow);
}

.glass-input {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    color: white;
    padding: 12px 16px;
    border-radius: 16px;
    transition: all 0.3s ease;
}
.glass-input:focus {
    outline: none;
    background: rgba(0, 0, 0, 0.4);
    border-color: var(--accent-color);
}

.glass-btn {
    background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0));
    border: 1px solid var(--glass-border);
    color: white;
    padding: 10px 20px;
    border-radius: 16px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 600;
}
.glass-btn:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}
.glass-btn.primary {
    background: var(--accent-color);
    color: #000;
    border: none;
}
/* 危険アクション用ボタン */
.glass-btn.danger {
    background: rgba(255, 71, 87, 0.2);
    color: #ffcccb;
    border-color: var(--danger-color);
}
.glass-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.4);
}

/* Chat Layout */
.app-container {
    display: flex;
    width: 95vw;
    height: 90vh;
    margin: 5vh auto;
    overflow: hidden;
}

.sidebar {
    width: 320px;
    margin-right: 20px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start; 
}

.main-chat {
    flex: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Messages */
.message-bubble {
    padding: 12px 18px;
    border-radius: 20px;
    margin-bottom: 4px; 
    position: relative;
    font-size: 14px;
    line-height: 1.5;
    word-break: break-all;
    cursor: context-menu; 
    max-width: 70%; 
}
.message-group {
    margin-bottom: 16px;
}
.message-bubble.sent {
    background: var(--accent-color);
    color: #0f172a;
    border-bottom-right-radius: 4px;
}
.message-bubble.received {
    background: rgba(255, 255, 255, 0.1);
    border-bottom-left-radius: 4px;
}

/* System Log (削除メッセージ用) */
.system-log {
    align-self: center;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: #a0a0a0;
    font-size: 11px;
    padding: 4px 12px;
    border-radius: 12px;
    margin: 8px 0;
    text-align: center;
}

/* Context Menu Items */
.menu-item {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 14px;
    transition: background 0.2s;
    background: transparent;
    border: none;
    color: white;
    cursor: pointer;
    text-align: left;
}
.menu-item:hover {
    background: rgba(255,255,255,0.1);
}

/* Animations */
.fade-in { animation: fadeIn 0.2s ease-out; }
@keyframes fadeIn { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }