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

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --text-light: #e2e8f0;
    --text-muted: #94a3b8;
    --border-color: #1e293b;
    --card-bg: #1e293b;
    --accent: #06b6d4;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-darker);
    color: var(--text-light);
    min-height: 100vh;
    overflow-x: hidden;
}

.hidden {
    display: none !important;
}

/* Login Screen */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-dark) 100%);
    position: relative;
    overflow: hidden;
}

.login-container::before {
    content: '';
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--primary-color) 0%, transparent 70%);
    opacity: 0.1;
    top: -250px;
    left: -250px;
    animation: float 20s infinite ease-in-out;
}

.login-container::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--secondary-color) 0%, transparent 70%);
    opacity: 0.1;
    bottom: -200px;
    right: -200px;
    animation: float 25s infinite ease-in-out reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(50px, 50px) rotate(180deg); }
}

.login-box {
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 48px;
    width: 100%;
    max-width: 400px;
    position: relative;
    z-index: 1;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5),
                0 0 0 1px rgba(99, 102, 241, 0.1),
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
    transform: perspective(1000px) rotateX(0deg);
    transition: transform 0.3s ease;
}

.login-box:hover {
    transform: perspective(1000px) rotateX(2deg);
}

.logo-3d {
    font-size: 32px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-transform: uppercase;
    letter-spacing: 4px;
    text-shadow: 0 0 30px rgba(99, 102, 241, 0.5);
    transform: perspective(500px) rotateY(-5deg);
    transition: transform 0.3s ease;
}

.logo-3d:hover {
    transform: perspective(500px) rotateY(5deg);
}

.login-box h2 {
    text-align: center;
    margin-bottom: 8px;
    font-size: 24px;
    font-weight: 600;
}

.subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 32px;
    font-size: 14px;
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: 12px;
    padding: 14px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
    width: 100%;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.primary-btn:active {
    transform: translateY(0);
}

.error-message {
    color: #ef4444;
    text-align: center;
    margin-top: 16px;
    font-size: 14px;
    min-height: 20px;
}

.debug-info {
    margin-top: 12px;
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.45);
    color: var(--text-muted);
    font-size: 12px;
    text-align: left;
    line-height: 1.35;
    word-break: break-word;
}

/* Admin Panel */
.admin-panel {
    min-height: 100vh;
    background: var(--bg-darker);
}

.header-3d {
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 24px 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.header-3d h1 {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logout-btn {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid rgba(239, 68, 68, 0.3);
    border-radius: 8px;
    padding: 8px 16px;
    color: #ef4444;
    cursor: pointer;
    transition: all 0.3s ease;
}

.logout-btn:hover {
    background: rgba(239, 68, 68, 0.3);
    transform: translateY(-1px);
}

.statistics-panel {
    background: rgba(30, 41, 59, 0.4);
    border-bottom: 1px solid var(--border-color);
    padding: 24px 32px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.stat-card {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary-color);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.2);
}

.stat-label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.filters-panel {
    background: rgba(30, 41, 59, 0.6);
    border-bottom: 1px solid var(--border-color);
    padding: 24px 32px;
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    align-items: flex-end;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.filter-group label {
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.filter-group select,
.filter-group input[type="date"] {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 14px;
    color: var(--text-light);
    font-size: 14px;
    min-width: 150px;
    transition: all 0.3s ease;
}

.filter-group select:focus,
.filter-group input[type="date"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.filter-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: 8px;
    padding: 10px 20px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    height: fit-content;
}

.filter-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.filter-btn.secondary {
    background: rgba(148, 163, 184, 0.2);
    border: 1px solid var(--border-color);
}

.filter-btn.secondary:hover {
    background: rgba(148, 163, 184, 0.3);
}

.content-area {
    padding: 32px;
    max-width: 1400px;
    margin: 0 auto;
}

.dialogs-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.dialog-message {
    background: rgba(30, 41, 59, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 20px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.dialog-message::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.dialog-message:hover {
    transform: translateX(4px);
    border-color: var(--primary-color);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.dialog-message:hover::before {
    opacity: 1;
}

.dialog-message.user {
    border-left-color: var(--accent);
}

.dialog-message.assistant {
    border-left-color: var(--secondary-color);
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-size: 12px;
    color: var(--text-muted);
}

.message-user-info {
    display: flex;
    gap: 12px;
    align-items: center;
}

.message-user-info strong {
    color: var(--text-light);
    font-weight: 600;
}

.message-role {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 10px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 1px;
}

.message-role.user {
    background: rgba(6, 182, 212, 0.2);
    color: var(--accent);
}

.message-role.assistant {
    background: rgba(139, 92, 246, 0.2);
    color: var(--secondary-color);
}

.message-text {
    color: var(--text-light);
    line-height: 1.6;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.message-time {
    font-size: 11px;
    color: var(--text-muted);
}

.loading {
    text-align: center;
    padding: 48px;
    color: var(--text-muted);
    font-size: 16px;
}

.empty-state {
    text-align: center;
    padding: 48px;
    color: var(--text-muted);
    font-size: 16px;
}

/* Responsive */
@media (max-width: 768px) {
    .filters-panel {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-group {
        width: 100%;
    }
    
    .filter-group select,
    .filter-group input[type="date"] {
        width: 100%;
    }
    
    .content-area {
        padding: 16px;
    }
}