:root {
    --bg-base: #0a0b10;
    --bg-gradient: radial-gradient(circle at 50% -20%, #1e1f29 0%, #0a0b10 80%);
    --card-bg: rgba(25, 27, 38, 0.65);
    --card-border: rgba(255, 255, 255, 0.06);
    --card-border-hover: rgba(255, 255, 255, 0.15);
    
    --text-primary: #f5f5f7;
    --text-secondary: #86868b;
    --text-muted: #48484a;
    
    --accent-blue: #0071e3;
    --accent-green: #30d158;
    --accent-gold: #ffd60a;
    --accent-red: #ff453a;
    
    --font-sans: 'Outfit', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Hiragino Sans", "Meiryo", sans-serif;
    --font-serif: 'Playfair Display', 'Shippori Mincho', "Yu Mincho", "Hiragino Mincho ProN", Georgia, serif;
    
    --transition-smooth: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-base);
    background-image: var(--bg-gradient);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.app-container.single-column {
    display: block;
    width: 100%;
    min-height: 100vh;
}

.main-content {
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
    padding: 64px 24px;
}

.main-header {
    margin-bottom: 48px;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 24px;
}

.logo-title {
    display: flex;
    align-items: baseline;
    gap: 16px;
    margin-bottom: 8px;
}

.logo-icon {
    font-size: 36px;
    filter: drop-shadow(0 0 12px rgba(0, 113, 227, 0.6));
    align-self: center;
}

.main-header h1 {
    font-family: var(--font-serif);
    font-size: 34px;
    font-weight: 400;
    letter-spacing: -0.5px;
    display: flex;
    align-items: baseline;
    gap: 12px;
}

.en-title {
    font-family: var(--font-sans);
    font-size: 18px;
    font-weight: 300;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 14px;
    margin-left: 52px;
}

/* 入力エリア */
.input-section {
    display: flex;
    flex-direction: column;
    gap: 28px;
    margin-bottom: 56px;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.input-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

textarea {
    width: 100%;
    height: 160px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 18px 20px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.6;
    resize: vertical;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: var(--transition-smooth);
}

textarea:focus {
    outline: none;
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 0 24px rgba(0, 113, 227, 0.2);
}

/* ボタン（2.4秒白黒反転の儀式美学） */
.action-area {
    display: flex;
    justify-content: center;
    margin-top: 8px;
}

.btn {
    font-family: var(--font-sans);
    font-size: 15px;
    font-weight: 500;
    padding: 16px 40px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
    background: transparent;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all 2.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn:hover {
    background: #ffffff;
    color: #000000;
    border-color: #ffffff;
    box-shadow: 0 0 24px rgba(255, 255, 255, 0.2);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: transparent;
    color: var(--text-muted);
    border-color: var(--card-border);
}

/* 出力エリア */
.output-section {
    animation: fadeIn 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.output-section.hidden {
    display: none;
}

.section-divider {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 40px 0 32px 0;
}

.section-divider::before,
.section-divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--card-border);
}

.section-divider span {
    padding: 0 16px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.advisors-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.advisor-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 24px 28px;
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.advisor-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: transparent;
    transition: var(--transition-smooth);
}

.advisor-card.active {
    border-color: var(--card-border-hover);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

.advisor-card.active::before {
    background: var(--accent-blue);
    box-shadow: 0 0 12px var(--accent-blue);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 18px;
}

.advisor-avatar {
    font-size: 24px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 12px;
    border: 1px solid var(--card-border);
}

.advisor-meta {
    flex: 1;
}

.advisor-meta h3 {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: -0.2px;
}

.role-tag {
    font-size: 12px;
    color: var(--text-secondary);
}

.pulse-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: transparent;
    transition: var(--transition-smooth);
}

.advisor-card.active .pulse-indicator {
    background: var(--accent-blue);
    box-shadow: 0 0 12px var(--accent-blue);
    animation: pulse 1.6s infinite;
}

.card-body {
    position: relative;
}

.advisor-response {
    font-size: 15px;
    line-height: 1.8;
    color: #d1d1d6;
    white-space: pre-wrap;
    word-break: break-word;
}

.advisor-response.font-elegant {
    font-family: var(--font-serif);
    font-size: 16px;
    color: #f5f5f7;
    letter-spacing: 0.2px;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0% { transform: scale(0.9); opacity: 0.6; }
    50% { transform: scale(1.3); opacity: 1; }
    100% { transform: scale(0.9); opacity: 0.6; }
}

@media (max-width: 640px) {
    .main-content {
        padding: 40px 16px;
    }
    .main-header h1 {
        font-size: 26px;
    }
    .subtitle {
        margin-left: 0;
        margin-top: 8px;
    }
}