/* ===================================
   Variables CSS - Colores Institucionales
   =================================== */
:root {
    --primary-color: #F5A623;
    --secondary-color: #8B2332;
    --dark-color: #1a1a1a;
    --light-color: #f8f9fa;
    --text-dark: #333333;
    --text-light: #666666;
    --white: #ffffff;
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --border-radius: 12px;
    --transition: all 0.3s ease;
    --shadow: 0 4px 15px rgba(0,0,0,0.1);
    --shadow-hover: 0 8px 25px rgba(0,0,0,0.15);
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===================================
   Header
   =================================== */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

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

.logo-section {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo {
    height: 60px;
    width: auto;
}

.brand h1 {
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    margin-bottom: 5px;
}

.brand p {
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 500;
}

/* Navegación */
.nav-menu ul {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: var(--transition);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-link:hover,
.nav-link.active {
    color: var(--secondary-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--secondary-color);
    transition: var(--transition);
}

.nav-close {
    display: none;
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    position: relative;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: var(--white);
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero::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 1200 600"><path d="M0,300 Q300,200 600,300 T1200,300 L1200,600 L0,600 Z" fill="rgba(255,255,255,0.05)"/></svg>');
    background-size: cover;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-badge {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    padding: 10px 25px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 40px;
    opacity: 0.95;
}

.hero-info {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.info-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   Botones
   =================================== */
.btn {
    display: inline-block;
    padding: 15px 35px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

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

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

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

.btn-large {
    padding: 18px 40px;
    font-size: 1.1rem;
}

/* ===================================
   Secciones
   =================================== */
.section {
    padding: 80px 0;
}

.section-light {
    background: var(--light-color);
}

.section-dark {
    background: var(--white);
}

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

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

.title-line {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    margin: 0 auto 20px;
    border-radius: 2px;
}

.section-description {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
}

/* ===================================
   Content Cards
   =================================== */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.content-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.content-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.card-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
}

.card-icon i {
    font-size: 2rem;
    color: var(--white);
}

.content-card h3 {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.content-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ===================================
   Objetivos
   =================================== */
.objectives-section {
    background: var(--white);
    padding: 50px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.subsection-title {
    font-size: 1.8rem;
    color: var(--secondary-color);
    margin-bottom: 30px;
    text-align: center;
}

.objectives-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.objective-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 20px;
    background: var(--light-color);
    border-radius: 10px;
    transition: var(--transition);
}

.objective-item:hover {
    background: #fff;
    box-shadow: var(--shadow);
}

.objective-item i {
    font-size: 1.5rem;
    color: var(--success);
    flex-shrink: 0;
}

.objective-item p {
    color: var(--text-dark);
    font-weight: 500;
}

/* ===================================
   Desafíos
   =================================== */
.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.challenge-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.challenge-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.challenge-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.challenge-number {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 4rem;
    font-weight: 800;
    color: rgba(245, 166, 35, 0.1);
}

.challenge-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.challenge-icon i {
    font-size: 2rem;
    color: var(--white);
}

.challenge-card h3 {
    font-size: 1.4rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.challenge-card p {
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.8;
}

.challenge-ods {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.ods-badge {
    background: var(--primary-color);
    color: var(--white);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.challenge-features {
    list-style: none;
    padding: 0;
}

.challenge-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    color: var(--text-dark);
}

.challenge-features i {
    color: var(--success);
}

/* ===================================
   Requisitos
   =================================== */
.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.req-card {
    background: var(--white);
    padding: 35px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.req-card h3 {
    color: var(--secondary-color);
    font-size: 1.3rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.req-card h3 i {
    color: var(--primary-color);
}

.req-card ul {
    list-style: none;
    padding: 0;
}

.req-card li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
    color: var(--text-dark);
}

.req-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

.important-note {
    background: #fff3cd;
    border-left: 4px solid var(--warning);
    padding: 25px;
    border-radius: var(--border-radius);
    display: flex;
    gap: 15px;
    align-items: flex-start;
}

.important-note i {
    font-size: 1.5rem;
    color: var(--warning);
    flex-shrink: 0;
}

/* ===================================
   Timeline (Cronograma)
   =================================== */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 40px;
    position: relative;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-marker {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
    box-shadow: 0 0 0 10px var(--white);
}

.timeline-marker i {
    font-size: 1.5rem;
    color: var(--white);
}

.timeline-content {
    flex: 1;
    background: var(--white);
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin: 0 30px;
    transition: var(--transition);
}

.timeline-content:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.timeline-content h3 {
    color: var(--secondary-color);
    margin-bottom: 10px;
    font-size: 1.3rem;
}

.timeline-date {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 10px;
}

.timeline-item.active .timeline-content,
.timeline-item.highlight .timeline-content {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

.timeline-item.active .timeline-content h3,
.timeline-item.highlight .timeline-content h3,
.timeline-item.active .timeline-date,
.timeline-item.highlight .timeline-date {
    color: var(--white);
}

/* ===================================
   Premios
   =================================== */
.prizes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.prize-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 40px 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.prize-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.prize-badge {
    width: 120px;
    height: 120px;
    margin: 0 auto 25px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

.first-place .prize-badge {
    background: linear-gradient(135deg, #FFD700, #FFA500);
}

.second-place .prize-badge {
    background: linear-gradient(135deg, #C0C0C0, #808080);
}

.third-place .prize-badge {
    background: linear-gradient(135deg, #CD7F32, #8B4513);
}

.prize-badge i {
    font-size: 2.5rem;
    color: var(--white);
    margin-bottom: 5px;
}

.prize-position {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--white);
}

.prize-label {
    font-size: 0.9rem;
    color: var(--white);
}

.prize-card h3 {
    color: var(--secondary-color);
    font-size: 1.5rem;
    margin-bottom: 25px;
}

.prize-items {
    text-align: left;
}

.prize-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 15px;
    margin-bottom: 10px;
    border-radius: 8px;
    background: var(--light-color);
}

.prize-item i {
    color: var(--primary-color);
    font-size: 1.2rem;
    flex-shrink: 0;
    margin-top: 3px;
}

.prize-item.highlight {
    background: linear-gradient(135deg, rgba(245, 166, 35, 0.1), rgba(139, 35, 50, 0.1));
    border: 2px solid var(--primary-color);
}

.additional-awards {
    background: var(--white);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.additional-awards h3 {
    color: var(--secondary-color);
    font-size: 1.5rem;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.additional-awards h3 i {
    color: var(--primary-color);
}

.awards-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.award-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 20px;
    background: var(--light-color);
    border-radius: 10px;
}

.award-item i {
    color: var(--success);
    font-size: 1.3rem;
    flex-shrink: 0;
}

/* ===================================
   Inscripción
   =================================== */
.inscription-content {
    margin-bottom: 50px;
}

.inscription-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.step {
    text-align: center;
    padding: 30px;
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step h3 {
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.inscription-cta {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: var(--white);
    padding: 60px;
    border-radius: var(--border-radius);
    text-align: center;
}

.inscription-cta h3 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.inscription-cta p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.evaluation-criteria {
    background: var(--white);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.evaluation-criteria h3 {
    color: var(--secondary-color);
    font-size: 1.8rem;
    margin-bottom: 30px;
    text-align: center;
}

.criteria-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.criteria-item {
    display: flex;
    flex-direction: column;
    padding: 20px;
    background: var(--light-color);
    border-radius: 10px;
    text-align: center;
}

.criteria-score {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.total-score {
    text-align: center;
    padding: 20px;
    background: linear-gradient(135deg, rgba(245, 166, 35, 0.1), rgba(139, 35, 50, 0.1));
    border-radius: 10px;
    font-size: 1.3rem;
    color: var(--secondary-color);
}

/* ===================================
   Contacto
   =================================== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.contact-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

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

.contact-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.contact-icon i {
    font-size: 2rem;
    color: var(--white);
}

.contact-card h3 {
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.contact-name {
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.contact-link:hover {
    color: var(--secondary-color);
}

.contact-info {
    color: var(--text-light);
    line-height: 2;
}

.social-links {
    text-align: center;
    background: var(--white);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.social-links h3 {
    color: var(--secondary-color);
    margin-bottom: 25px;
}

.social-icons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.social-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.3rem;
    transition: var(--transition);
}

.social-icon:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: var(--shadow-hover);
}

/* ===================================
   Footer
   =================================== */
.footer {
    background: var(--secondary-color);
    color: var(--white);
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo img {
    height: 60px;
    margin-bottom: 15px;
    background: var(--white);
    padding: 5px;
    border-radius: 50%;
}

.footer-logo p {
    opacity: 0.9;
}

.footer-links h4,
.footer-info h4 {
    margin-bottom: 20px;
    color: var(--primary-color);
}

.footer-links ul {
    list-style: none;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
    display: block;
    padding: 5px 0;
}

.footer-links a:hover {
    opacity: 1;
    color: var(--primary-color);
}

.footer-info p {
    opacity: 0.9;
    margin-bottom: 10px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255,255,255,0.2);
    opacity: 0.8;
}

/* ===================================
   Agente IA - Chat Flotante
   =================================== */
.ai-chat-button {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: 50%;
    color: var(--white);
    font-size: 1.8rem;
    cursor: pointer;
    box-shadow: var(--shadow-hover);
    z-index: 999;
    transition: var(--transition);
    position: relative;
}

.ai-chat-button:hover {
    transform: scale(1.1);
}

.ai-pulse {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(1.5);
        opacity: 0;
    }
}

.ai-chat-window {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 400px;
    height: 600px;
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-hover);
    z-index: 1000;
    display: none;
    flex-direction: column;
    overflow: hidden;
}

.ai-chat-window.active {
    display: flex;
}

.ai-chat-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.ai-header-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.ai-header-info i {
    font-size: 1.8rem;
}

.ai-header-info h4 {
    margin: 0;
    font-size: 1.1rem;
}

.ai-status {
    font-size: 0.85rem;
    opacity: 0.9;
}

.ai-close-btn {
    background: rgba(255,255,255,0.2);
    border: none;
    color: var(--white);
    width: 35px;
    height: 35px;
    border-radius: 50%;
    font-size: 1.3rem;
    cursor: pointer;
    transition: var(--transition);
}

.ai-close-btn:hover {
    background: rgba(255,255,255,0.3);
}

.ai-chat-body {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background: #f5f5f5;
}

.ai-message {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ai-avatar {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}

.ai-text {
    background: var(--white);
    padding: 15px;
    border-radius: 12px;
    max-width: 80%;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.ai-bot .ai-text {
    background: var(--white);
}

.ai-user {
    flex-direction: row-reverse;
}

.ai-user .ai-text {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
}

.ai-user .ai-avatar {
    background: #333;
}

.ai-text ul {
    margin: 10px 0;
    padding-left: 20px;
}

.ai-text li {
    margin: 5px 0;
}

.ai-chat-footer {
    background: var(--white);
    padding: 15px;
    border-top: 1px solid #ddd;
}

.ai-quick-questions {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.quick-question-btn {
    background: var(--light-color);
    border: 1px solid #ddd;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 5px;
}

.quick-question-btn:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--white);
    border-color: transparent;
}

.ai-input-form {
    display: flex;
    gap: 10px;
}

.ai-input {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid #ddd;
    border-radius: 25px;
    font-size: 0.95rem;
    transition: var(--transition);
}

.ai-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

.ai-send-btn {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: 50%;
    color: var(--white);
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
}

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

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

.ai-loading {
    display: flex;
    gap: 5px;
    padding: 10px;
}

.ai-loading span {
    width: 8px;
    height: 8px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: bounce 1.4s infinite ease-in-out both;
}

.ai-loading span:nth-child(1) {
    animation-delay: -0.32s;
}

.ai-loading span:nth-child(2) {
    animation-delay: -0.16s;
}

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
    }
    40% {
        transform: scale(1);
    }
}

/* ===================================
   Responsive
   =================================== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: var(--white);
        padding: 80px 30px 30px;
        box-shadow: -5px 0 15px rgba(0,0,0,0.1);
        transition: var(--transition);
        z-index: 999;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu ul {
        flex-direction: column;
        gap: 20px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-close {
        display: block;
        position: absolute;
        top: 20px;
        right: 20px;
        background: none;
        border: none;
        font-size: 2rem;
        color: var(--secondary-color);
        cursor: pointer;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-info {
        gap: 20px;
    }

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

    .timeline::before {
        left: 30px;
    }

    .timeline-item,
    .timeline-item:nth-child(odd) {
        flex-direction: row;
    }

    .timeline-marker {
        width: 50px;
        height: 50px;
    }

    .timeline-content {
        margin-left: 20px;
        margin-right: 0;
    }

    .ai-chat-window {
        width: 90%;
        right: 5%;
        height: 500px;
    }

    .prizes-grid,
    .challenges-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .logo {
        height: 45px;
    }

    .brand h1 {
        font-size: 1.2rem;
    }

    .brand p {
        font-size: 0.8rem;
    }
}