/* ============================================
   VARIABLES Y CONFIGURACIÓN GLOBAL
   ============================================ */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #10b981;
    --accent: #f59e0b;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --text-dark: #1f2937;
    --text-gray: #6b7280;
    --border: #e5e7eb;
    --shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

/* ============================================
   NAVEGACIÓN
   ============================================ */
.navbar {
    position: sticky;
    top: 0;
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-gray);
    font-weight: 500;
    transition: var(--transition);
}

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

.btn-login {
    color: var(--text-dark) !important;
}

.btn-signup {
    background-color: var(--primary);
    color: var(--bg-white) !important;
    padding: 0.5rem 1.5rem;
    border-radius: 0.5rem;
}

.btn-signup:hover {
    background-color: var(--primary-dark);
}

/* ============================================
   BOTONES GENERALES
   ============================================ */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    text-align: center;
}

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

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

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

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

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

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

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

.btn-block {
    width: 100%;
    display: block;
}

/* ============================================
   SECCIÓN HERO
   ============================================ */
.hero {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.25rem;
    color: var(--text-gray);
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 400px;
}

.globe-animation {
    font-size: 12rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-30px);
    }
}

/* ============================================
   SECCIÓN CARACTERÍSTICAS
   ============================================ */
.features {
    background-color: var(--bg-light);
    padding: 4rem 2rem;
}

.features h2,
.about h2,
.cta h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

.features-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--bg-white);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

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

/* ============================================
   SECCIÓN ABOUT
   ============================================ */
.about {
    max-width: 1200px;
    margin: 0 auto;
    padding: 4rem 2rem;
    text-align: center;
}

.about p {
    font-size: 1.1rem;
    color: var(--text-gray);
    margin-bottom: 3rem;
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

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

.stat strong {
    font-size: 2rem;
    color: var(--primary);
}

.stat span {
    color: var(--text-gray);
    font-size: 0.95rem;
}

/* ============================================
   SECCIÓN CTA
   ============================================ */
.cta {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--bg-white);
    padding: 4rem 2rem;
    text-align: center;
}

.cta h2 {
    color: var(--bg-white);
    margin-bottom: 1rem;
}

.cta p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.9);
}

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

.cta .btn-primary:hover {
    background-color: var(--bg-light);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background-color: var(--text-dark);
    color: var(--bg-white);
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1rem;
}

.footer-links a {
    color: var(--bg-white);
    text-decoration: none;
    transition: var(--transition);
}

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

/* ============================================
   AUTENTICACIÓN - LAYOUT
   ============================================ */
.auth-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 100vh;
    gap: 0;
}

.auth-form-wrapper {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 2rem;
    background-color: var(--bg-white);
}

.auth-visual {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--bg-white);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.visual-content {
    text-align: center;
}

.visual-content h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.visual-content p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.benefits-list {
    list-style: none;
    text-align: left;
    display: inline-block;
    font-size: 1rem;
    line-height: 2;
}

/* ============================================
   AUTENTICACIÓN - FORMULARIOS
   ============================================ */
.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h1 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.auth-header p {
    font-size: 1.25rem;
    color: var(--text-gray);
}

.auth-form {
    max-width: 400px;
}

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

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

.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="text"] {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-remember {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
}

.checkbox input {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.forgot-link {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

.forgot-link:hover {
    text-decoration: underline;
}

.error-message {
    display: block;
    color: #ef4444;
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.auth-divider {
    text-align: center;
    margin: 1.5rem 0;
    color: var(--text-gray);
    position: relative;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 45%;
    height: 1px;
    background-color: var(--border);
}

.auth-divider::before {
    left: 0;
}

.auth-divider::after {
    right: 0;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
    color: var(--text-gray);
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
    }

    .hero {
        grid-template-columns: 1fr;
        padding: 2rem 1rem;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .hero-visual {
        height: 300px;
    }

    .globe-animation {
        font-size: 8rem;
    }

    .features h2,
    .about h2,
    .cta h2 {
        font-size: 2rem;
    }

    .auth-container {
        grid-template-columns: 1fr;
    }

    .auth-visual {
        display: none;
    }

    .auth-form-wrapper {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        flex-direction: column;
        gap: 0.5rem;
    }

    .hero-content h1 {
        font-size: 1.5rem;
    }

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

    .form-remember {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
}