@import url('variables.css');
@import url('animations.css');

/* ==========================================================================
   1. RESET & TIPOGRAFÍA EDITORIAL
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex-grow: 1;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    color: var(--color-text);
}

p {
    color: var(--color-text-muted);
}

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

ul {
    list-style: none;
}

img, video {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ==========================================================================
   2. UTILIDADES DE TEXTO & GRADIENTES
   ========================================================================== */
.gradient-text {
    background: linear-gradient(135deg, var(--color-text) 40%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.gradient-text-amber {
    background: linear-gradient(135deg, var(--color-text) 40%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

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

/* ==========================================================================
   3. BARRA DE NAVEGACIÓN (STUDIO PRO NAVBAR)
   ========================================================================== */
.main-header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: 0.85rem 0;
    transition: background var(--transition);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.logo a {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--color-text);
}

.logo-dot {
    width: 8px;
    height: 8px;
    background-color: var(--color-primary);
    border-radius: 50%;
    display: inline-block;
}

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

.nav-links a {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-muted);
    transition: all var(--transition);
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.mobile-toggle-btn {
    display: none;
}

/* Menú Desplegable Móvil */
.mobile-nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    z-index: 999;
}

.mobile-nav-menu.active {
    display: block;
    animation: fadeInSlide 0.25s ease-out;
}

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

.mobile-links {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 1.2rem;
}

.mobile-links a {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0.5rem 0;
}

.mobile-links a i {
    color: var(--color-primary);
    width: 18px;
    height: 18px;
}

/* ==========================================================================
   4. BOTONES ELEGANTES & PILL CTA
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 1.4rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.88rem;
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid transparent;
    gap: 0.5rem;
    user-select: none;
    text-align: center;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--color-primary);
    color: #ffffff;
    box-shadow: var(--shadow-btn-primary);
}

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

.btn-pro {
    background-color: var(--color-secondary);
    color: #ffffff;
    box-shadow: var(--shadow-btn-pro);
}

.btn-pro:hover {
    background-color: var(--color-secondary-hover);
    color: #ffffff;
    transform: translateY(2px);
    box-shadow: var(--shadow-btn-pro-active);
}

.btn-outline {
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.btn-outline:hover {
    border-color: rgba(0, 0, 0, 0.1);
    background: rgba(0, 0, 0, 0.06);
    color: var(--color-primary-dark);
    transform: translateY(-2px);
}

.btn-icon {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    width: 38px;
    height: 38px;
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition);
    flex-shrink: 0;
}

.btn-icon:hover {
    color: var(--color-primary-dark);
    border-color: rgba(0, 0, 0, 0.1);
    background: rgba(0, 0, 0, 0.04);
}

/* ==========================================================================
   5. INSIGNIAS & PILL BADGES
   ========================================================================== */
.pill-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-primary);
    border: 1px solid var(--color-primary-border);
    padding: 4px 14px;
    border-radius: 9999px;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.pill-badge-amber {
    background: rgba(245, 158, 11, 0.12);
    color: var(--color-secondary);
    border: 1px solid var(--color-secondary-border);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 6px;
    letter-spacing: 0.02em;
}

.badge-free {
    background: var(--color-primary-light);
    color: var(--color-primary);
    border: 1px solid var(--color-primary-border);
}

.badge-pro {
    background: var(--color-secondary-light);
    color: var(--color-secondary);
    border: 1px solid var(--color-secondary-border);
}

/* ==========================================================================
   6. CONTENEDORES & TARJETAS DE ESTUDIO (GLASS CARDS)
   ========================================================================== */
.glass-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-3d-idle);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.8);
    transform: translateY(-5px) scale(1.01);
    box-shadow: var(--shadow-3d-hover);
}

.feature-card, .card {
    background: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-3d-idle);
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
}

.feature-card:hover, .card:hover {
    border-color: var(--color-primary-border);
    transform: translateY(-5px) scale(1.01);
    box-shadow: var(--shadow-3d-hover);
}

.card-pro {
    border-color: rgba(245, 158, 11, 0.25);
}

.card-pro:hover {
    border-color: var(--color-secondary);
    box-shadow: 0 16px 36px rgba(245, 158, 11, 0.15);
}

/* ==========================================================================
   7. LAYOUTS & ESTRUCTURA FLUIDA
   ========================================================================== */
.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 1.5rem;
    width: 100%;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.8rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.8rem;
}

.creator-hero-grid {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    gap: 4rem;
    align-items: center;
}

.creator-about-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.course-details-layout {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 2.5rem;
    align-items: start;
}

.classroom-layout {
    display: grid;
    grid-template-columns: 1fr 380px;
    min-height: calc(100vh - 140px);
}

.classroom-main {
    padding: 1.5rem 2rem;
    overflow-y: auto;
}

.classroom-sidebar {
    background: #0d1210;
    border-left: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
}

/* ==========================================================================
   8. FORMULARIOS LIMPIOS
   ========================================================================== */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1.1rem;
}

label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.form-control {
    width: 100%;
    padding: 0.7rem 0.95rem;
    background: #f9fafa;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: var(--font-primary);
    font-size: 0.9rem;
    transition: border-color var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}

.form-control::placeholder {
    color: var(--color-text-dim);
}

/* ==========================================================================
   9. FOOTER DE ESTUDIO
   ========================================================================== */
.main-footer {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: 4rem 0 2rem 0;
    margin-top: 6rem;
}

.footer-content {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 3.5rem;
}

.footer-section h3 {
    font-size: 1.3rem;
    font-weight: 800;
    margin-bottom: 0.8rem;
    color: var(--color-text);
}

.footer-section h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.footer-section p {
    font-size: 0.88rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.footer-bottom {
    max-width: 1240px;
    margin: 3rem auto 0 auto;
    padding: 1.5rem 1.5rem 0 1.5rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
    font-size: 0.85rem;
    color: var(--color-text-dim);
}

/* ==========================================================================
   10. RESPONSIVE MEDIA QUERIES (TABLETS & SMARTPHONES)
   ========================================================================== */
@media (max-width: 992px) {
    .creator-hero-grid,
    .creator-about-grid,
    .course-details-layout,
    .classroom-layout {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
}

@media (max-width: 768px) {
    .nav-links,
    .nav-desktop-btn {
        display: none;
    }

    .mobile-toggle-btn {
        display: inline-flex;
    }

    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   Widget Flotante de WhatsApp (Estilo Popup)
   ========================================================================== */
.whatsapp-widget-container {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
    font-family: inherit;
}

.whatsapp-float-btn {
    width: 60px;
    height: 60px;
    background-color: #25D366;
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    outline: none;
}

.whatsapp-float-btn:hover {
    transform: scale(1.1);
}

.whatsapp-popup {
    position: absolute;
    bottom: 80px;
    right: 0;
    width: 320px;
    background-color: var(--color-card-bg);
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.95);
    transform-origin: bottom right;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid var(--color-border);
}

.whatsapp-popup.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.whatsapp-popup-header {
    background-color: #075E54;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.whatsapp-avatar {
    width: 40px;
    height: 40px;
    background: #fff;
    border-radius: 50%;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.whatsapp-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.whatsapp-close {
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s, background 0.2s;
}

.whatsapp-close:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
}

.whatsapp-popup-body {
    padding: 1.5rem 1rem;
    background-color: var(--color-bg-alt);
    background-image: url("data:image/svg+xml,%3Csvg width='20' height='20' viewBox='0 0 20 20' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%239C92AC' fill-opacity='0.05' fill-rule='evenodd'%3E%3Ccircle cx='3' cy='3' r='3'/%3E%3Ccircle cx='13' cy='13' r='3'/%3E%3C/g%3E%3C/svg%3E");
    min-height: 120px;
}

.whatsapp-message {
    background: var(--color-card-bg);
    padding: 12px 15px;
    border-radius: 0 12px 12px 12px;
    box-shadow: 0 1px 2px rgba(0,0,0,0.1);
    position: relative;
    max-width: 90%;
}

.whatsapp-message::before {
    content: '';
    position: absolute;
    top: 0;
    left: -8px;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 0 10px 10px 0;
    border-color: transparent var(--color-card-bg) transparent transparent;
}

.whatsapp-time {
    display: block;
    text-align: right;
    font-size: 0.7rem;
    color: var(--color-text-dim);
    margin-top: 5px;
}

.whatsapp-popup-footer {
    padding: 1rem;
    background: var(--color-card-bg);
    border-top: 1px solid var(--color-border);
}

.whatsapp-btn-start {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 0.8rem;
    background-color: #25D366;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: background-color 0.2s;
}

.whatsapp-btn-start:hover {
    background-color: #128C7E;
    color: white;
}