/* InterviewPro - Modern Dark Theme */

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

:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --border: #333333;
    --glass-bg: rgba(255, 255, 255, 0.02);
    --glass-border: rgba(255, 255, 255, 0.1);
    --accent: #ffffff;
    --accent-hover: #f0f0f0;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.hidden {
    display: none !important;
}

/* Auth Modal */
.auth-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.auth-container {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 3rem;
    width: 100%;
    max-width: 420px;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.auth-tabs {
    display: flex;
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 0.25rem;
    margin-bottom: 2rem;
}

.auth-tab {
    flex: 1;
    padding: 0.875rem 1rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    font-size: 0.95rem;
}

.auth-tab.active {
    background: var(--accent);
    color: var(--bg-primary);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input {
    width: 100%;
    padding: 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.form-group input::placeholder {
    color: var(--text-muted);
}

.auth-submit {
    width: 100%;
    padding: 1rem;
    background: var(--accent);
    border: none;
    border-radius: 12px;
    color: var(--bg-primary);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
}

.auth-submit:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.auth-footer {
    text-align: center;
    margin-top: 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.auth-footer span {
    color: var(--accent);
    cursor: pointer;
    font-weight: 500;
}

/* Header */
.header {
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.logo i {
    font-size: 1.5rem;
}

.nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

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

.cta-button {
    padding: 0.75rem 1.5rem;
    background: var(--accent);
    border: none;
    border-radius: 10px;
    color: var(--bg-primary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.cta-button:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.user-menu {
    position: relative;
    color: var(--text-secondary);
    cursor: pointer;
}

.user-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 0.5rem;
    backdrop-filter: blur(20px);
    min-width: 120px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
}

.user-menu:hover .user-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown button {
    width: 100%;
    padding: 0.75rem;
    background: none;
    border: none;
    color: var(--text-primary);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
}

.user-dropdown button:hover {
    background: var(--bg-tertiary);
}

/* Hero Section */
.hero {
    padding: 4rem 0;
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 600;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* Interface Card */
.interface-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    margin-bottom: 3rem;
}

.interface-tabs {
    display: flex;
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 0.25rem;
    margin-bottom: 2rem;
}

.tab-btn {
    flex: 1;
    padding: 1rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.tab-btn.active {
    background: var(--accent);
    color: var(--bg-primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Form Elements */
.form-section {
    margin-bottom: 2rem;
}

.form-label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-input {
    width: 100%;
    padding: 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.1);
}

.form-input::placeholder {
    color: var(--text-muted);
}

.form-row {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.form-select {
    padding: 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    cursor: pointer;
    min-width: 150px;
}

.generate-btn {
    flex: 1;
    padding: 1rem 2rem;
    background: var(--accent);
    border: none;
    border-radius: 12px;
    color: var(--bg-primary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.generate-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

/* Questions */
.questions-container {
    margin-top: 2rem;
}

.questions-container h3 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.questions-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.question-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.25rem;
    transition: var(--transition);
    cursor: pointer;
}

.question-item:hover {
    border-color: var(--accent);
    background: var(--bg-secondary);
}

.question-number {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.question-text {
    color: var(--text-primary);
    line-height: 1.5;
}

/* Analyze Section */
.analyze-section {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.record-options {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.record-option-btn {
    padding: 1rem 2rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.record-option-btn.active {
    background: var(--accent);
    color: var(--bg-primary);
    border-color: var(--accent);
}

.record-mode {
    display: none;
}

.record-mode.active {
    display: block;
}

/* Video Recording */
.video-preview-container {
    position: relative;
    background: var(--bg-secondary);
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-preview {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 12px;
}

.video-overlay {
    position: absolute;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 1rem;
}

.record-btn {
    padding: 0.875rem 1.5rem;
    background: #ef4444;
    border: none;
    border-radius: 25px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.record-btn.stop {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* File Upload */
.upload-area {
    border: 2px dashed var(--border);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--accent);
    background: rgba(255, 255, 255, 0.02);
}

.upload-content h3 {
    margin: 1rem 0 0.5rem;
    color: var(--text-primary);
}

.upload-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.upload-icon {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

.browse-btn {
    padding: 0.75rem 2rem;
    background: var(--accent);
    border: none;
    border-radius: 12px;
    color: var(--bg-primary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.browse-btn:hover {
    background: var(--accent-hover);
}

.file-preview {
    text-align: center;
}

.uploaded-video {
    width: 100%;
    max-width: 500px;
    border-radius: 12px;
    margin-bottom: 1rem;
}

.file-info {
    display: flex;
    justify-content: center;
    gap: 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.analyze-btn {
    width: 100%;
    padding: 1.25rem;
    background: var(--accent);
    border: none;
    border-radius: 12px;
    color: var(--bg-primary);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

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

.analyze-btn:not(:disabled):hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

/* History Section */
.history-section {
    text-align: center;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.history-stats {
    display: flex;
    gap: 2rem;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.empty-history {
    padding: 3rem;
    color: var(--text-secondary);
}

.empty-history i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--accent);
}

.history-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.history-item:hover {
    background: var(--bg-secondary);
}

.history-info h4 {
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.history-info p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.history-score {
    background: var(--accent);
    color: var(--bg-primary);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.875rem;
}

/* Results Section */
.results-section {
    margin-top: 3rem;
    animation: slideUp 0.5s ease-out;
}

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

.results-container {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
}

.results-title {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.results-content {
    display: grid;
    gap: 2rem;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.result-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
}

.result-card h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.score-display {
    text-align: center;
    margin-bottom: 1rem;
}

.score-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: conic-gradient(var(--accent) 0deg, var(--accent) var(--score-deg, 0deg), var(--border) var(--score-deg, 0deg));
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    position: relative;
}

.score-circle::before {
    content: '';
    width: 60px;
    height: 60px;
    background: var(--bg-tertiary);
    border-radius: 50%;
    position: absolute;
}

.score-text {
    position: relative;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent);
}

.issue-item,
.tip-item {
    background: var(--bg-secondary);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 0.75rem;
}

.issue-item .timestamp {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.875rem;
}

.tip-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.tip-item i {
    color: #10b981;
    margin-top: 0.25rem;
}

/* How It Works Section */
.how-it-works {
    padding: 6rem 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.02) 0%, rgba(255, 255, 255, 0.01) 100%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 4rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.step {
    text-align: center;
    padding: 2rem;
}

.step-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.5rem;
    color: white;
}

.step-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.step-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-container {
        padding: 0 1rem;
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero-container {
        padding: 0 1rem;
    }
    
    .interface-card {
        padding: 1.5rem;
    }
    
    .interface-tabs {
        flex-direction: column;
    }
    
    .form-row {
        flex-direction: column;
    }
    
    .record-options {
        flex-direction: column;
    }
    
    .history-header {
        flex-direction: column;
        gap: 1rem;
    }
    
    .steps-container {
        gap: 2rem;
    }
    
    .container {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .auth-container {
        margin: 1rem;
        padding: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .step {
        padding: 1rem;
    }
}