/* ===================================================
   NAUTICAL NURTURE - APPLE-INSPIRED CSS
   Modern Seaweed Analysis System
   ================================================ */

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

:root {
    /* Apple-inspired Color Palette */
    --primary-blue: #007AFF;
    --primary-dark: #0056CC;
    --secondary-teal: #32D74B;
    --accent-orange: #FF9500;
    --error-red: #FF3B30;

    /* Neutral Colors */
    --text-primary: #1D1D1F;
    --text-secondary: #86868B;
    --text-tertiary: #515154;
    --background-primary: #FFFFFF;
    --background-secondary: #F5F5F7;
    --background-tertiary: #FBFBFD;

    /* Glass Effect Colors */
    --glass-white: rgba(255, 255, 255, 0.8);
    --glass-dark: rgba(0, 0, 0, 0.05);

    /* Shadows */
    --shadow-small: 0 2px 10px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 8px 25px rgba(0, 0, 0, 0.12);
    --shadow-large: 0 15px 40px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 25px 60px rgba(0, 0, 0, 0.18);

    /* Border Radius */
    --radius-small: 8px;
    --radius-medium: 16px;
    --radius-large: 24px;
    --radius-xl: 32px;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
    --spacing-3xl: 96px;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===================================================
   BASE STYLES
   ================================================ */

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    color: var(--text-primary);
    background-color: var(--background-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===================================================
   TYPOGRAPHY
   ================================================ */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-semibold);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.section-subtitle {
    font-size: 1.25rem;
    font-weight: var(--font-weight-regular);
    color: var(--text-secondary);
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
}

/* ===================================================
   BUTTONS
   ================================================ */

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-large);
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-medium);
    position: relative;
    overflow: hidden;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-large);
}

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

.btn-secondary {
    background: var(--glass-white);
    color: var(--text-primary);
    padding: 1rem 2rem;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-large);
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-normal);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-outline {
    background: transparent;
    color: var(--primary-blue);
    padding: 1rem 2rem;
    border: 2px solid var(--primary-blue);
    border-radius: var(--radius-large);
    font-size: 1rem;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-outline:hover {
    background: var(--primary-blue);
    color: white;
    transform: translateY(-2px);
}

.btn-reset {
    background: var(--background-secondary);
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--radius-small);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-reset:hover {
    background: var(--text-secondary);
    color: white;
}

/* ===================================================
   HERO SECTION
   ================================================ */

.hero-section {
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--spacing-3xl);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
    z-index: 2;
}

.hero-content {
    color: white;
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: var(--font-weight-bold);
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.05em;
}

.hero-highlight {
    background: linear-gradient(135deg, #32D74B, #007AFF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: var(--font-weight-light);
    opacity: 0.9;
    margin-bottom: var(--spacing-xl);
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease-out 0.3s both;
}

.floating-card {
    background: var(--glass-white);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
    animation: float 6s ease-in-out infinite;
}

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

.metric-value {
    display: block;
    font-size: 4rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
}

.metric-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-xl);
    left: 50%;
    transform: translateX(-50%);
    color: white;
    text-align: center;
    opacity: 0.8;
    animation: fadeIn 2s ease-out 2s both;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid white;
    border-bottom: 2px solid white;
    transform: rotate(45deg);
    margin: var(--spacing-xs) auto 0;
    animation: bounce 2s infinite;
}

/* ===================================================
   FEATURES SECTION
   ================================================ */

.features-section {
    padding: var(--spacing-3xl) 0;
    background: var(--background-tertiary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.feature-card {
    background: var(--background-primary);
    border-radius: var(--radius-large);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-small);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-teal));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
    transform-origin: left;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-large);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-teal));
    border-radius: var(--radius-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-small);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
    color: white;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.feature-stats {
    display: flex;
    gap: var(--spacing-md);
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-blue);
}

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

/* ===================================================
   ANALYSIS SECTION
   ================================================ */

.analysis-section {
    padding: var(--spacing-3xl) 0;
    background: var(--background-primary);
}

.analysis-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.upload-section {
    margin-bottom: var(--spacing-2xl);
}

.upload-area {
    border: 3px dashed #E5E5EA;
    border-radius: var(--radius-large);
    padding: var(--spacing-3xl) var(--spacing-md);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    background: var(--background-tertiary);
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s;
}

.upload-area:hover {
    border-color: var(--primary-blue);
    background: rgba(0, 122, 255, 0.03);
    transform: translateY(-2px);
}

.upload-area:hover::before {
    left: 100%;
}

.upload-area.drag-over {
    border-color: var(--secondary-teal);
    background: rgba(50, 215, 75, 0.05);
    transform: scale(1.02);
}

.upload-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-teal));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-medium);
}

.upload-icon svg {
    width: 40px;
    height: 40px;
    color: white;
}

.upload-area h3 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.upload-area p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.file-types {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.upload-progress {
    margin-top: var(--spacing-md);
    text-align: center;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: #E5E5EA;
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-teal));
    border-radius: 3px;
    animation: progress 2s ease-in-out;
}

.progress-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
}

/* ===================================================
   RESULTS SECTION
   ================================================ */

.results-section {
    background: var(--background-primary);
    border-radius: var(--radius-large);
    box-shadow: var(--shadow-medium);
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out;
}

.results-header {
    background: var(--background-secondary);
    padding: var(--spacing-md) var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #E5E5EA;
}

.results-header h3 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.results-content {
    padding: var(--spacing-xl);
}

.image-preview {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.image-preview img {
    max-width: 100%;
    max-height: 400px;
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-medium);
    object-fit: contain;
}

.detection-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.metric-card {
    background: var(--background-tertiary);
    border-radius: var(--radius-medium);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-fast);
}

.metric-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-small);
}

.metric-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-small);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.metric-icon.classification {
    background: linear-gradient(135deg, #32D74B, #30D158);
}

.metric-icon.quality {
    background: linear-gradient(135deg, #FF9500, #FF9F0A);
}

.metric-icon.moisture {
    background: linear-gradient(135deg, #007AFF, #5AC8FA);
}

.metric-icon.price {
    background: linear-gradient(135deg, #FF3B30, #FF453A);
}

.metric-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.metric-content {
    flex: 1;
    min-width: 0;
}

.metric-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-tertiary);
    font-weight: var(--font-weight-medium);
    margin-bottom: 2px;
}

.metric-value {
    display: block;
    font-size: 1.25rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
}

.metric-confidence {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
}

/* ===================================================
   DETAILED ANALYSIS TABS
   ================================================ */

.detailed-analysis {
    border-top: 1px solid #E5E5EA;
    padding-top: var(--spacing-xl);
}

.analysis-tabs {
    display: flex;
    border-bottom: 1px solid #E5E5EA;
    margin-bottom: var(--spacing-md);
}

.tab-button {
    background: none;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    border-bottom: 2px solid transparent;
}

.tab-button.active {
    color: var(--primary-blue);
    border-bottom-color: var(--primary-blue);
}

.tab-button:hover {
    color: var(--text-primary);
}

.tab-panel {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

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

.tab-panel h4 {
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.detection-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
}

.detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid #F2F2F7;
}

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

.detail-value {
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

/* ===================================================
   FEATURE ANALYSIS BARS
   ================================================ */

.features-chart {
    space-y: var(--spacing-md);
}

.feature-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.feature-name {
    min-width: 140px;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
}

.bar-container {
    flex: 1;
    height: 8px;
    background: #E5E5EA;
    border-radius: 4px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-teal));
    border-radius: 4px;
    transition: width 1s ease-out;
}

.feature-score {
    min-width: 50px;
    text-align: right;
    font-size: 0.875rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
}

/* ===================================================
   MARKET INTELLIGENCE
   ================================================ */

.market-insights {
    background: var(--background-tertiary);
    border-radius: var(--radius-medium);
    padding: var(--spacing-md);
}

.insight-card h5 {
    font-size: 1rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.market-indicators {
    space-y: var(--spacing-sm);
}

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

.indicator-label {
    min-width: 120px;
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
}

.indicator-bar {
    flex: 1;
    height: 6px;
    background: #E5E5EA;
    border-radius: 3px;
    overflow: hidden;
}

.indicator-fill {
    height: 100%;
    background: linear-gradient(135deg, var(--secondary-teal), #30D158);
    border-radius: 3px;
    transition: width 1s ease-out;
}

.indicator-fill.volatility {
    background: linear-gradient(135deg, var(--accent-orange), #FF9F0A);
}

.indicator-value {
    min-width: 60px;
    text-align: right;
    font-size: 0.875rem;
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
}

/* ===================================================
   STATISTICS SECTION
   ================================================ */

.stats-section {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-dark));
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    text-align: center;
}

.stat-item {
    animation: fadeInUp 0.6s ease-out;
}

.stat-number {
    font-size: 3rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-xs);
    background: linear-gradient(135deg, #FFFFFF, rgba(255, 255, 255, 0.8));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
    font-weight: var(--font-weight-medium);
}

/* ===================================================
   TECHNOLOGY SECTION
   ================================================ */

.technology-section {
    padding: var(--spacing-3xl) 0;
    background: var(--background-secondary);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
}

.tech-card {
    background: var(--background-primary);
    border-radius: var(--radius-large);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-small);
    transition: all var(--transition-normal);
}

.tech-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-large);
}

.tech-icon {
    width: 80px;
    height: 80px;
    background: var(--background-secondary);
    border-radius: var(--radius-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.tech-icon img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.tech-card h4 {
    font-size: 1.25rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.tech-card p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===================================================
   CTA SECTION
   ================================================ */

.cta-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--background-tertiary), var(--background-secondary));
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 122, 255, 0.1) 0%, transparent 70%);
    animation: pulse 4s ease-in-out infinite;
}

.cta-section .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: var(--spacing-2xl);
    position: relative;
    z-index: 2;
}

.cta-content {
    text-align: left;
}

.cta-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.cta-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.cta-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.cta-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.floating-metrics {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
}

.metric-bubble {
    background: var(--glass-white);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-large);
    padding: var(--spacing-md);
    text-align: center;
    box-shadow: var(--shadow-medium);
    animation: float 6s ease-in-out infinite;
    animation-delay: calc(var(--i) * 0.5s);
}

.metric-bubble:nth-child(1) { --i: 0; }
.metric-bubble:nth-child(2) { --i: 1; }
.metric-bubble:nth-child(3) { --i: 2; }

.bubble-value {
    display: block;
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
}

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

/* ===================================================
   MODALS
   ================================================ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    animation: fadeIn 0.3s ease-out;
}

.modal-content {
    background: var(--background-primary);
    border-radius: var(--radius-large);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-xl);
    animation: scaleIn 0.3s ease-out;
}

.modal-content.error {
    border-top: 4px solid var(--error-red);
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid #E5E5EA;
    border-top: 4px solid var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

.modal-content h3 {
    font-size: 1.5rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.modal-content p {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.loading-steps {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-md);
    gap: var(--spacing-xs);
}

.step {
    flex: 1;
    padding: var(--spacing-xs);
    background: #E5E5EA;
    border-radius: var(--radius-small);
    font-size: 0.75rem;
    font-weight: var(--font-weight-medium);
    color: var(--text-tertiary);
    transition: all var(--transition-fast);
}

.step.active {
    background: var(--primary-blue);
    color: white;
}

.step.completed {
    background: var(--secondary-teal);
    color: white;
}

.error-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    color: var(--error-red);
}

/* ===================================================
   ANIMATIONS
   ================================================ */

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

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

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

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

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes progress {
    from { width: 0%; }
    to { width: 100%; }
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.1; }
}

/* ===================================================
   RESPONSIVE DESIGN
   ================================================ */

@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: var(--spacing-xl);
    }

    .cta-section .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .floating-metrics {
        flex-direction: row;
        justify-content: center;
        margin-top: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xs: 6px;
        --spacing-sm: 12px;
        --spacing-md: 18px;
        --spacing-lg: 24px;
        --spacing-xl: 36px;
        --spacing-2xl: 48px;
        --spacing-3xl: 72px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary,
    .btn-secondary,
    .btn-outline {
        width: 100%;
        max-width: 300px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .metrics-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tech-grid {
        grid-template-columns: 1fr;
    }

    .analysis-tabs {
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }

    .tab-button {
        flex: 1;
        min-width: 100px;
    }

    .detection-details {
        grid-template-columns: 1fr;
    }

    .floating-metrics {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .modal-content {
        width: 95%;
        padding: var(--spacing-md);
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .loading-steps {
        flex-direction: column;
        gap: var(--spacing-xs);
    }
}

/* ===================================================
   ACCESSIBILITY & PERFORMANCE
   ================================================ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #F2F2F7;
        --text-secondary: #98989D;
        --text-tertiary: #8E8E93;
        --background-primary: #000000;
        --background-secondary: #1C1C1E;
        --background-tertiary: #2C2C2E;
    }

    .upload-area {
        border-color: #48484A;
        background: var(--background-secondary);
    }

    .feature-card,
    .tech-card,
    .modal-content {
        background: var(--background-secondary);
    }

    .metric-card {
        background: var(--background-tertiary);
    }
}

/* ===================================================
   UTILITY CLASSES
   ================================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.hidden { display: none !important; }
.visible { display: block !important; }

.fade-in { animation: fadeIn 0.5s ease-out; }
.fade-in-up { animation: fadeInUp 0.5s ease-out; }

.shadow-small { box-shadow: var(--shadow-small); }
.shadow-medium { box-shadow: var(--shadow-medium); }
.shadow-large { box-shadow: var(--shadow-large); }

.rounded { border-radius: var(--radius-medium); }
.rounded-large { border-radius: var(--radius-large); }