/* ===== CSS Reset & Base ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Colors */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #4facfe 100%);
    --success-color: #4ade80;
    --error-color: #f87171;
    --bg-dark: #0f0f1e;
    --bg-darker: #08080f;
    --card-bg: rgba(26, 26, 46, 0.7);
    --text-primary: #ffffff;
    --text-secondary: #a0a0b8;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --glow: 0 0 20px rgba(102, 126, 234, 0.5);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ===== Animated Background ===== */
.gradient-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(79, 172, 254, 0.1) 0%, transparent 50%);
    z-index: -1;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

/* ===== Container ===== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===== Header ===== */
.header {
    padding: var(--spacing-md) 0;
    backdrop-filter: blur(10px);
    background: rgba(15, 15, 30, 0.8);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    font-size: 2rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.logo h1 {
    font-size: 1.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--error-color);
    animation: pulse 2s ease-in-out infinite;
}

.status-dot.connected {
    background: var(--success-color);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ===== Main Content ===== */
.main-content {
    padding: var(--spacing-xl) 0;
    min-height: calc(100vh - 200px);
}

/* ===== Hero Section ===== */
.hero {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Content Grid ===== */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

/* ===== Card ===== */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 0.8s ease;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg), var(--glow);
}

.card-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.icon {
    font-size: 1.5rem;
}

/* ===== Upload Area ===== */
.upload-area {
    border: 2px dashed rgba(102, 126, 234, 0.5);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: var(--spacing-md);
    position: relative;
    min-height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-area:hover {
    border-color: rgba(102, 126, 234, 1);
    background: rgba(102, 126, 234, 0.05);
}

.upload-area.dragover {
    border-color: var(--success-color);
    background: rgba(74, 222, 128, 0.1);
    transform: scale(1.02);
}

.upload-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.upload-text {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.upload-subtext {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.image-preview {
    position: relative;
    width: 100%;
}

.image-preview img {
    max-width: 100%;
    max-height: 300px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.btn-remove {
    position: absolute;
    top: 10px;
    right: 10px;
    background: var(--error-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: transform 0.2s ease;
}

.btn-remove:hover {
    transform: scale(1.1);
}

/* ===== Buttons ===== */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    width: 100%;
    justify-content: center;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--glow);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-icon {
    font-size: 1.2rem;
}

/* ===== Chat Section ===== */
.chat-messages {
    height: 400px;
    overflow-y: auto;
    padding: var(--spacing-md);
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    scroll-behavior: smooth;
}

.chat-messages::-webkit-scrollbar {
    width: 8px;
}

.chat-messages::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(102, 126, 234, 0.5);
    border-radius: 10px;
}

.welcome-message {
    text-align: center;
    color: var(--text-secondary);
    padding: var(--spacing-xl);
}

.message {
    margin-bottom: var(--spacing-md);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.message.user {
    text-align: right;
}

.message-content {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    max-width: 80%;
}

.message.user .message-content {
    background: var(--primary-gradient);
    color: white;
}

.message.agent .message-content {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.message.system .message-content {
    background: rgba(74, 222, 128, 0.2);
    color: var(--success-color);
    text-align: center;
    display: block;
    max-width: 100%;
}

.chat-input-container {
    display: flex;
    gap: var(--spacing-sm);
}

.chat-input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.chat-input:focus {
    outline: none;
    border-color: rgba(102, 126, 234, 0.5);
    background: rgba(255, 255, 255, 0.08);
}

.btn-send {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.btn-send:hover:not(:disabled) {
    transform: scale(1.05);
}

.btn-send:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ===== Results Section ===== */
.results-card {
    grid-column: 1 / -1;
}

.result-prediction {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.prediction-label {
    font-size: 2rem;
    font-weight: 700;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    animation: scaleIn 0.5s ease;
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.prediction-label.realism {
    background: rgba(74, 222, 128, 0.2);
    color: var(--success-color);
}

.prediction-label.deepfake {
    background: rgba(248, 113, 113, 0.2);
    color: var(--error-color);
}

.prediction-confidence {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

#confidenceValue {
    font-weight: 700;
    color: var(--text-primary);
    margin-left: var(--spacing-xs);
}

.confidence-meter {
    margin-bottom: var(--spacing-lg);
}

.meter-bar {
    height: 30px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
}

.meter-fill {
    height: 100%;
    background: var(--primary-gradient);
    border-radius: var(--radius-lg);
    transition: width 1s ease;
    position: relative;
    overflow: hidden;
}

.meter-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.detailed-scores {
    display: grid;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.score-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
}

.score-label {
    font-weight: 600;
}

.score-value {
    color: var(--text-secondary);
}

.explanation-section {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: rgba(102, 126, 234, 0.1);
    border-left: 4px solid rgba(102, 126, 234, 0.5);
    border-radius: var(--radius-md);
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.explanation-section h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.explanation-text {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===== Agent Status ===== */
.agent-status {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    background: var(--card-bg);
    backdrop-filter: blur(10px);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.status-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.status-spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(102, 126, 234, 0.3);
    border-top-color: rgba(102, 126, 234, 1);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--text-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .header .container {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}