/* ===================================
   AI Anti-Scam Training System
   Professional Modern UI Design
   =================================== */

/* CSS Variables - Unique Color Palette */
:root {
    /* Coral Theme */
    --coral-primary: #FF6B6B;
    --coral-secondary: #FF8E53;
    --coral-gradient: linear-gradient(135deg, #FF6B6B 0%, #FF8E53 100%);
    
    /* Violet Theme */
    --violet-primary: #6C5CE7;
    --violet-secondary: #A29BFE;
    --violet-gradient: linear-gradient(135deg, #6C5CE7 0%, #A29BFE 100%);
    
    /* Emerald Theme */
    --emerald-primary: #00B894;
    --emerald-secondary: #00CEC9;
    --emerald-gradient: linear-gradient(135deg, #00B894 0%, #00CEC9 100%);
    
    /* Azure Theme */
    --azure-primary: #0984E3;
    --azure-secondary: #74B9FF;
    --azure-gradient: linear-gradient(135deg, #0984E3 0%, #74B9FF 100%);
    
    /* Neutral Colors */
    --bg-dark: #0F1419;
    --bg-medium: #1A1F2E;
    --text-primary: #FFFFFF;
    --text-secondary: #A0AEC0;
    --text-dark: #2D3748;
    
    /* 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: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.25);
}

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

body {
    font-family: 'Outfit', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Animated Background Pattern */
.background-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(108, 92, 231, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 107, 107, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(0, 184, 148, 0.15) 0%, transparent 50%);
    animation: patternShift 20s ease-in-out infinite;
}

@keyframes patternShift {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.1) rotate(5deg); }
}

/* Header Section */
.header {
    position: relative;
    z-index: 10;
    padding: var(--spacing-xl) var(--spacing-lg);
    animation: fadeInDown 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
}

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

.shield-icon {
    width: 64px;
    height: 64px;
    background: var(--violet-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    animation: float 3s ease-in-out infinite;
}

.shield-icon svg {
    width: 36px;
    height: 36px;
    color: white;
}

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

.title-group h1 {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #FFFFFF 0%, #A0AEC0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 300;
    letter-spacing: 0.02em;
}

.version-badge {
    padding: 0.5rem 1.25rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: var(--text-primary);
}

/* Header Right Section */
.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Model Switch Container */
.model-switch-container {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.25rem;
    background: rgba(26, 31, 46, 0.8);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    transition: all 0.3s ease;
}

.model-switch-container:hover {
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.model-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.model-icon {
    font-size: 1.25rem;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.model-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    transition: all 0.3s ease;
    text-shadow: 0 0 10px currentColor;
}

.switch-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--violet-gradient);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(108, 92, 231, 0.3);
}

.switch-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(108, 92, 231, 0.5);
}

.switch-button:active {
    transform: translateY(0);
}

/* Gemini 模式時的按鈕樣式 */
.switch-button.active {
    background: linear-gradient(135deg, #0984E3 0%, #74B9FF 100%);
    box-shadow: 0 2px 8px rgba(9, 132, 227, 0.3);
}

.switch-button.active:hover {
    box-shadow: 0 4px 16px rgba(9, 132, 227, 0.5);
}

.switch-toggle {
    width: 36px;
    height: 20px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 10px;
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.switch-slider {
    width: 16px;
    height: 16px;
    background: white;
    border-radius: 50%;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.switch-button.active .switch-slider {
    transform: translateX(16px);
    background: #FFD700;
}

.switch-button.active .switch-toggle {
    background: rgba(255, 215, 0, 0.3);
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

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

.modal-content {
    background: var(--bg-medium);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-small {
    max-width: 400px;
}

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

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 2rem;
    cursor: pointer;
    transition: color 0.3s ease;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-lg);
}

.modal-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    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: 0.875rem;
    transition: all 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--violet-primary);
    background: rgba(255, 255, 255, 0.08);
}

.form-group input + input {
    margin-top: 0.5rem;
}

.form-group small {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.form-group small a {
    color: var(--violet-primary);
    text-decoration: none;
}

.form-group small a:hover {
    text-decoration: underline;
}

.input-with-toggle {
    position: relative;
}

.input-with-toggle input {
    padding-right: 3rem;
}

.toggle-visibility {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

.toggle-visibility:hover {
    opacity: 1;
}

.validation-status {
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
    font-size: 0.875rem;
}

.validation-status.success {
    background: rgba(0, 184, 148, 0.1);
    border: 1px solid rgba(0, 184, 148, 0.3);
    color: var(--emerald-primary);
}

.validation-status.error {
    background: rgba(255, 107, 107, 0.1);
    border: 1px solid rgba(255, 107, 107, 0.3);
    color: var(--coral-primary);
}

.modal-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

.btn-primary, .btn-secondary, .btn-success {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--violet-gradient);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(108, 92, 231, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn-success {
    background: var(--emerald-gradient);
    color: white;
}

.btn-success:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 184, 148, 0.4);
}

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

.switch-info {
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    color: var(--text-secondary);
}

.info-item strong {
    color: var(--text-primary);
}

/* Modes Container */
.modes-container {
    position: relative;
    z-index: 10;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

/* Mode Card */
.mode-card {
    position: relative;
    background: rgba(26, 31, 46, 0.8);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    min-height: 400px;
}

.mode-card:nth-child(1) { animation-delay: 0.1s; }
.mode-card:nth-child(2) { animation-delay: 0.2s; }
.mode-card:nth-child(3) { animation-delay: 0.3s; }
.mode-card:nth-child(4) { animation-delay: 0.4s; }

/* Card Glow Effect */
.card-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.mode-card[data-color="coral"] .card-glow {
    background: radial-gradient(circle, rgba(255, 107, 107, 0.3) 0%, transparent 70%);
}

.mode-card[data-color="violet"] .card-glow {
    background: radial-gradient(circle, rgba(108, 92, 231, 0.3) 0%, transparent 70%);
}

.mode-card[data-color="emerald"] .card-glow {
    background: radial-gradient(circle, rgba(0, 184, 148, 0.3) 0%, transparent 70%);
}

.mode-card[data-color="azure"] .card-glow {
    background: radial-gradient(circle, rgba(9, 132, 227, 0.3) 0%, transparent 70%);
}

.mode-card:hover {
    transform: translateY(-12px) scale(1.02);
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-xl);
}

.mode-card:hover .card-glow {
    opacity: 1;
}

.mode-card:active {
    transform: translateY(-8px) scale(1.01);
}

/* Mode Content */
.mode-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.icon-wrapper {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.05);
    transition: all 0.3s ease;
}

.mode-card:hover .icon-wrapper {
    transform: scale(1.1) rotate(5deg);
}

.mode-icon {
    font-size: 3rem;
    line-height: 1;
}

.badge-container {
    display: flex;
    gap: var(--spacing-xs);
}

.mode-badge {
    display: inline-block;
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-lg);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.mode-badge.updated {
    background: var(--coral-gradient);
    color: white;
}

.mode-badge.new {
    background: var(--emerald-gradient);
    color: white;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

.mode-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    line-height: 1.2;
}

.mode-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    font-weight: 300;
}

.mode-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin: var(--spacing-sm) 0;
}

.mode-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.9375rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
}

.mode-card[data-color="coral"] .feature-icon {
    background: var(--coral-gradient);
    color: white;
}

.mode-card[data-color="violet"] .feature-icon {
    background: var(--violet-gradient);
    color: white;
}

.mode-card[data-color="emerald"] .feature-icon {
    background: var(--emerald-gradient);
    color: white;
}

.mode-card[data-color="azure"] .feature-icon {
    background: var(--azure-gradient);
    color: white;
}

/* Mode Button */
.mode-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    margin-top: auto;
    position: relative;
    overflow: hidden;
}

.mode-card[data-color="coral"] .mode-button {
    background: var(--coral-gradient);
    color: white;
}

.mode-card[data-color="violet"] .mode-button {
    background: var(--violet-gradient);
    color: white;
}

.mode-card[data-color="emerald"] .mode-button {
    background: var(--emerald-gradient);
    color: white;
}

.mode-card[data-color="azure"] .mode-button {
    background: var(--azure-gradient);
    color: white;
}

.mode-button svg {
    width: 20px;
    height: 20px;
    transition: transform 0.3s ease;
}

.mode-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.mode-button:hover svg {
    transform: translateX(4px);
}

.mode-button:active {
    transform: translateY(0);
}

/* Footer */
.footer {
    position: relative;
    z-index: 10;
    padding: var(--spacing-xl) var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.footer-tech {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 400;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: var(--text-primary);
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Responsive Design */
@media (max-width: 1024px) {
    .modes-container {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: var(--spacing-md);
    }

    .title-group h1 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .header {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .logo-section {
        flex-direction: column;
    }
    
    .title-group h1 {
        font-size: 1.75rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .modes-container {
        grid-template-columns: 1fr !important;
        padding: var(--spacing-md);
    }

    .mode-card {
        padding: var(--spacing-lg);
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .footer-links {
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .shield-icon {
        width: 48px;
        height: 48px;
    }
    
    .shield-icon svg {
        width: 28px;
        height: 28px;
    }
    
    .title-group h1 {
        font-size: 1.5rem;
    }

    .mode-icon {
        font-size: 2.5rem;
    }

    .mode-title {
        font-size: 1.5rem;
    }
}