/*
================================================================================
 * Sentiment Analysis Dataset - Styles
 * 
 * Project: Sentiment Analysis Dataset
 * Description: Text sentiment analysis dataset with labeled reviews, comments,
 *              and social media posts for sentiment classification models.
 * Category: Text Data
 * Difficulty: Intermediate
 * 
 * Author: Molla Samser (Founder)
 * Designer & Tester: Rima Khatun
 * Website: https://rskworld.in
 * Email: help@rskworld.in | support@rskworld.in
 * Phone: +91 93305 39277
 * 
 * © 2026 RSK World - Free Programming Resources & Source Code
 * All rights reserved.
================================================================================
*/

/* ============================================
   CSS Variables & Root
   ============================================ */
:root {
    /* Primary Colors - Crimson/Ruby Theme */
    --primary: #dc3545;
    --primary-dark: #a71d2a;
    --primary-light: #f8d7da;
    --primary-rgb: 220, 53, 69;
    
    /* Secondary Colors */
    --secondary: #6c757d;
    --secondary-dark: #495057;
    
    /* Semantic Colors */
    --positive: #28a745;
    --positive-light: #d4edda;
    --neutral: #ffc107;
    --neutral-light: #fff3cd;
    --negative: #dc3545;
    --negative-light: #f8d7da;
    
    /* Background Colors */
    --bg-primary: #0d0d0d;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #242424;
    --bg-card: #1e1e1e;
    --bg-gradient: linear-gradient(135deg, #1a0a0a 0%, #0d0d0d 50%, #0a0a1a 100%);
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-muted: #6c757d;
    
    /* Border & Shadow */
    --border-color: rgba(220, 53, 69, 0.2);
    --border-radius: 12px;
    --border-radius-lg: 24px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 30px rgba(220, 53, 69, 0.3);
    
    /* Typography */
    --font-primary: 'DM Sans', sans-serif;
    --font-heading: 'Crimson Pro', serif;
    
    /* Transitions */
    --transition: all 0.3s ease;
    --transition-slow: all 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   Animated Background
   ============================================ */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: var(--bg-gradient);
    overflow: hidden;
}

.floating-shapes span {
    position: absolute;
    display: block;
    width: 20px;
    height: 20px;
    background: rgba(220, 53, 69, 0.1);
    animation: float 25s linear infinite;
    border-radius: 50%;
}

.floating-shapes span:nth-child(1) { left: 10%; width: 80px; height: 80px; animation-delay: 0s; }
.floating-shapes span:nth-child(2) { left: 20%; width: 20px; height: 20px; animation-delay: 2s; animation-duration: 12s; }
.floating-shapes span:nth-child(3) { left: 30%; width: 60px; height: 60px; animation-delay: 4s; }
.floating-shapes span:nth-child(4) { left: 40%; width: 40px; height: 40px; animation-delay: 0s; animation-duration: 18s; }
.floating-shapes span:nth-child(5) { left: 50%; width: 30px; height: 30px; animation-delay: 0s; }
.floating-shapes span:nth-child(6) { left: 60%; width: 100px; height: 100px; animation-delay: 3s; }
.floating-shapes span:nth-child(7) { left: 70%; width: 50px; height: 50px; animation-delay: 7s; }
.floating-shapes span:nth-child(8) { left: 80%; width: 25px; height: 25px; animation-delay: 15s; animation-duration: 45s; }
.floating-shapes span:nth-child(9) { left: 85%; width: 15px; height: 15px; animation-delay: 2s; animation-duration: 35s; }
.floating-shapes span:nth-child(10) { left: 90%; width: 90px; height: 90px; animation-delay: 0s; animation-duration: 11s; }

@keyframes float {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.1;
    }
    90% {
        opacity: 0.1;
    }
    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}

/* ============================================
   Container
   ============================================ */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================
   Header & Navigation
   ============================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(13, 13, 13, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo i {
    color: var(--primary);
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 25px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    color: var(--text-secondary);
}

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

.btn-download {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--primary);
    color: white;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: var(--transition);
}

.btn-download:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ============================================
   Buttons
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.btn-large {
    padding: 18px 36px;
    font-size: 1.1rem;
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    padding-bottom: 60px;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: rgba(220, 53, 69, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.hero-badge i {
    font-size: 1.1rem;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, #ff6b7a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    max-width: 500px;
}

.hero-stats {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 5px;
}

.stat-item i {
    color: var(--primary);
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    font-family: var(--font-heading);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.hero-actions {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

/* Hero Visual */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.sentiment-showcase {
    display: flex;
    flex-direction: column;
    gap: 20px;
    width: 100%;
    max-width: 350px;
}

.sentiment-card {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    animation: slideIn 0.6s ease forwards;
    opacity: 0;
}

.sentiment-card:nth-child(1) { animation-delay: 0.2s; }
.sentiment-card:nth-child(2) { animation-delay: 0.4s; }
.sentiment-card:nth-child(3) { animation-delay: 0.6s; }

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.sentiment-card:hover {
    transform: translateX(-10px);
    border-color: transparent;
}

.sentiment-card.positive:hover {
    box-shadow: 0 0 30px rgba(40, 167, 69, 0.3);
}

.sentiment-card.neutral:hover {
    box-shadow: 0 0 30px rgba(255, 193, 7, 0.3);
}

.sentiment-card.negative:hover {
    box-shadow: 0 0 30px rgba(220, 53, 69, 0.3);
}

.sentiment-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 1.8rem;
}

.positive .sentiment-icon {
    background: var(--positive-light);
    color: var(--positive);
}

.neutral .sentiment-icon {
    background: var(--neutral-light);
    color: #856404;
}

.negative .sentiment-icon {
    background: var(--negative-light);
    color: var(--negative);
}

.sentiment-info {
    display: flex;
    flex-direction: column;
}

.sentiment-label {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.sentiment-count {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--text-secondary);
}

/* ============================================
   Section Styles
   ============================================ */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(220, 53, 69, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 15px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.section-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ============================================
   Features Section
   ============================================ */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    padding: 35px;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(220, 53, 69, 0.1);
    border-radius: 50%;
    margin-bottom: 20px;
    font-size: 1.8rem;
    color: var(--primary);
}

.feature-card h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    margin-bottom: 12px;
}

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

/* ============================================
   Explorer Section
   ============================================ */
.explorer {
    background: var(--bg-secondary);
}

.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.filter-tab:hover,
.filter-tab.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.samples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.sample-card {
    padding: 25px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.sample-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.sample-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.sample-source {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.sample-sentiment {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
}

.sample-sentiment.positive {
    background: var(--positive-light);
    color: var(--positive);
}

.sample-sentiment.neutral {
    background: var(--neutral-light);
    color: #856404;
}

.sample-sentiment.negative {
    background: var(--negative-light);
    color: var(--negative);
}

.sample-text {
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 0.95rem;
}

.explorer-actions {
    text-align: center;
}

/* ============================================
   Technologies Section
   ============================================ */
.tech-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
}

.tech-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    padding: 30px 40px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.tech-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.tech-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    font-size: 2rem;
}

.tech-icon.csv { background: #28a745; color: white; }
.tech-icon.txt { background: #6c757d; color: white; }
.tech-icon.json { background: #ffc107; color: #333; }
.tech-icon.nltk { background: #0d6efd; color: white; }
.tech-icon.spacy { background: #09A3D5; color: white; }

.tech-card span {
    font-weight: 600;
    font-size: 1.1rem;
}

/* ============================================
   Structure Section
   ============================================ */
.structure {
    background: var(--bg-secondary);
}

.structure-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.file-tree {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    padding: 30px;
}

.tree-header {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--primary);
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.tree-list {
    padding-left: 20px;
}

.tree-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 15px;
}

.tree-item > i {
    color: var(--primary);
}

.tree-item > span {
    font-weight: 500;
}

.tree-sublist {
    padding-left: 25px;
}

.tree-sublist li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.tree-sublist li i {
    color: var(--text-muted);
}

.tree-sublist li i.fa-python {
    color: #3776ab;
}

.highlight-folder {
    color: var(--primary) !important;
    font-weight: 600;
}

.structure-info h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 25px;
}

.info-item {
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    margin-bottom: 15px;
}

.info-item strong {
    display: block;
    color: var(--primary);
    margin-bottom: 8px;
    font-family: monospace;
}

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

.info-item.highlight {
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.15) 0%, var(--bg-card) 100%);
    border-color: var(--primary);
}

/* ============================================
   Statistics Section
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.stats-card {
    padding: 30px;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
}

.stats-card h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    margin-top: 20px;
    color: var(--text-secondary);
}

.stats-chart {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stats-card.metrics {
    text-align: left;
}

.stats-card.metrics h3 {
    margin-top: 0;
    margin-bottom: 25px;
    color: var(--text-primary);
}

.metric-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.metric-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.metric-item:last-child {
    border-bottom: none;
}

.metric-label {
    color: var(--text-secondary);
}

.metric-value {
    font-size: 1.3rem;
    font-weight: 700;
    font-family: var(--font-heading);
    color: var(--primary);
}

.metric-unit {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-left: 5px;
}

/* ============================================
   Use Cases Section
   ============================================ */
.use-cases {
    background: var(--bg-secondary);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.case-card {
    padding: 35px 25px;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.case-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(220, 53, 69, 0.1);
    border-radius: 50%;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: var(--primary);
}

.case-card h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.case-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============================================
   Download Section
   ============================================ */
.download {
    padding: 80px 0;
}

.download-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 50px;
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.2) 0%, var(--bg-card) 100%);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
}

.download-content h2 {
    font-family: var(--font-heading);
    font-size: 2rem;
    margin-bottom: 15px;
}

.download-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    max-width: 500px;
}

.download-meta {
    display: flex;
    gap: 25px;
}

.download-meta span {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.download-meta i {
    color: var(--primary);
}

.download-action {
    text-align: center;
}

.download-note {
    display: block;
    margin-top: 15px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--bg-secondary);
    padding: 60px 0 30px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
}

.footer-logo i {
    color: var(--primary);
}

.footer-brand p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    max-width: 300px;
}

.footer-social {
    display: flex;
    gap: 15px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    color: var(--text-secondary);
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.footer-column ul li {
    margin-bottom: 12px;
}

.footer-column ul li a,
.footer-column ul li {
    color: var(--text-secondary);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-column ul li a:hover {
    color: var(--primary);
}

.footer-column ul li i {
    color: var(--primary);
    width: 20px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.footer-bottom strong {
    color: var(--primary);
}

/* ============================================
   Back to Top Button
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
}

/* ============================================
   Advanced Features Section
   ============================================ */
.advanced-features {
    background: var(--bg-secondary);
}

.advanced-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.advanced-card {
    display: flex;
    gap: 20px;
    padding: 30px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.advanced-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
}

.advanced-icon {
    width: 60px;
    height: 60px;
    min-width: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(220, 53, 69, 0.1);
    border-radius: var(--border-radius);
    font-size: 1.5rem;
    color: var(--primary);
}

.advanced-content h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.advanced-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.advanced-content code {
    display: inline-block;
    padding: 6px 12px;
    background: var(--bg-primary);
    border-radius: 6px;
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.8rem;
    color: var(--primary);
    border: 1px solid var(--border-color);
}

/* ============================================
   Step by Step Guide Section
   ============================================ */
.guide-timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.guide-timeline::before {
    content: '';
    position: absolute;
    left: 40px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary) 0%, rgba(220, 53, 69, 0.2) 100%);
    border-radius: 3px;
}

.guide-step {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
    position: relative;
}

.guide-step:last-child {
    margin-bottom: 0;
}

.step-number {
    width: 80px;
    height: 80px;
    min-width: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: white;
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    border-radius: 50%;
    z-index: 1;
    box-shadow: 0 0 20px rgba(220, 53, 69, 0.4);
}

.step-content {
    flex: 1;
    padding: 25px 30px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.step-content h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    margin-bottom: 10px;
    color: var(--primary);
}

.step-content > p {
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.step-code {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.code-label {
    display: block;
    padding: 8px 15px;
    background: rgba(220, 53, 69, 0.1);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
}

.step-code pre {
    padding: 15px;
    margin: 0;
    overflow-x: auto;
}

.step-code code {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============================================
   Unique Features Section
   ============================================ */
.unique-features {
    background: var(--bg-secondary);
}

.unique-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.unique-card {
    padding: 30px;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
}

.unique-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.unique-card.featured {
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.1) 0%, var(--bg-card) 100%);
    border-color: var(--primary);
}

.unique-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    padding: 6px 16px;
    background: var(--primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 50px;
    text-transform: uppercase;
}

.unique-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(220, 53, 69, 0.1);
    border-radius: 50%;
    margin-bottom: 20px;
    font-size: 1.8rem;
    color: var(--primary);
}

.unique-card h3 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.unique-card > p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.unique-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.unique-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.unique-list li i {
    color: var(--positive);
    font-size: 0.8rem;
}

/* ============================================
   Python Scripts Section
   ============================================ */
.scripts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
}

.script-card {
    padding: 25px;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.script-card:hover {
    transform: translateY(-3px);
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.script-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.script-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(220, 53, 69, 0.1);
    border-radius: var(--border-radius);
    font-size: 1.3rem;
    color: var(--primary);
}

.script-header h3 {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 1.1rem;
    color: var(--primary);
}

.script-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 15px;
}

.script-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 15px;
}

.script-features span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    background: var(--bg-tertiary);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.script-features span i {
    color: var(--positive);
    font-size: 0.7rem;
}

.script-usage {
    padding: 12px 15px;
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.usage-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 5px;
}

.script-usage code {
    font-family: 'Fira Code', 'Consolas', monospace;
    font-size: 0.85rem;
    color: var(--primary);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1200px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-description {
        margin: 0 auto 30px;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .sentiment-showcase {
        margin: 40px auto 0;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advanced-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .unique-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .guide-timeline::before {
        left: 35px;
    }
    
    .step-number {
        width: 70px;
        height: 70px;
        min-width: 70px;
        font-size: 1.6rem;
    }
    
    .structure-content {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .download-card {
        flex-direction: column;
        text-align: center;
        gap: 30px;
    }
    
    .download-content p {
        margin: 0 auto 20px;
    }
    
    .download-meta {
        justify-content: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-brand {
        text-align: center;
    }
    
    .footer-brand p {
        max-width: 100%;
    }
    
    .footer-social {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .features-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .advanced-grid,
    .unique-grid {
        grid-template-columns: 1fr;
    }
    
    .advanced-card {
        flex-direction: column;
        text-align: center;
    }
    
    .guide-timeline::before {
        display: none;
    }
    
    .guide-step {
        flex-direction: column;
        gap: 15px;
    }
    
    .step-number {
        width: 60px;
        height: 60px;
        min-width: 60px;
        font-size: 1.4rem;
        margin: 0 auto;
    }
    
    .step-content {
        text-align: center;
    }
    
    .step-code {
        text-align: left;
    }
    
    .scripts-grid {
        grid-template-columns: 1fr;
    }
    
    .samples-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .filter-tabs {
        gap: 10px;
    }
    
    .filter-tab {
        padding: 10px 18px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .stat-item {
        align-items: center;
    }
    
    .btn {
        padding: 12px 20px;
        font-size: 0.9rem;
    }
    
    .download-card {
        padding: 30px 20px;
    }
    
    .download-meta {
        flex-direction: column;
        gap: 10px;
    }
}