/**
 * Landing Page Styles - MathMentor IA
 * nomasceros.es
 */

/* ===========================
   COLOR VARIABLES
   =========================== */
:root {
    /* Brand Colors */
    --landing-primary: #0d6efd;      /* Azul Bootstrap - Primary CTAs */
    --landing-success: #20c997;      /* Verde - Gamificación */
    --landing-accent: #17a2b8;       /* Cian - Acentos */
    --landing-dark: #2c3e50;         /* Texto oscuro */
    --landing-light: #f8f9fa;        /* Fondo claro */
    --landing-white: #ffffff;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--landing-primary) 0%, var(--landing-accent) 100%);
    --gradient-success: linear-gradient(135deg, var(--landing-success) 0%, #17a589 100%);

    /* Shadows */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 5px 20px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.15);

    /* Spacing */
    --section-padding-desktop: 80px;
    --section-padding-mobile: 40px;
}

/* Dark Mode Overrides */
body.dark-mode {
    --landing-light: #1a1d23;
    --landing-white: #2d3139;
    --landing-dark: #e9ecef;
    --shadow-sm: 0 2px 10px rgba(255, 255, 255, 0.05);
    --shadow-md: 0 5px 20px rgba(255, 255, 255, 0.08);
    --shadow-lg: 0 10px 30px rgba(255, 255, 255, 0.12);
}

/* ===========================
   NAVBAR LANDING
   =========================== */
.landing-navbar {
    padding: 1rem 0;
    transition: all 0.3s ease;
    background-color: var(--landing-white) !important;
}

.landing-navbar .navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    transition: transform 0.2s ease;
}

.landing-navbar .navbar-brand:hover {
    transform: scale(1.05);
}

.landing-navbar .btn-primary {
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
}

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

/* Dark Mode Toggle - Landing Specific */
.theme-switch-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
}

.theme-icon {
    font-size: 1.2rem;
    color: var(--landing-dark);
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

body.dark-mode .theme-icon {
    color: var(--landing-light);
}

/* ===========================
   HERO SECTION
   =========================== */
.hero-section {
    padding: 140px 0 80px;  /* Account for fixed navbar */
    min-height: 85vh;
    background: var(--gradient-primary);
    color: white;
    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,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.3;
}

.hero-section .container {
    position: relative;
    z-index: 1;
}

.hero-section h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-section .lead {
    font-size: 1.5rem;
    font-weight: 400;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.hero-section .btn-cta {
    padding: 1rem 3rem;
    font-size: 1.25rem;
    font-weight: 700;
    border-radius: 50px;
    background-color: white;
    color: var(--landing-primary);
    border: none;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
}

.hero-section .btn-cta:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
    background-color: var(--landing-light);
}

.hero-section .btn-cta i {
    margin-left: 0.5rem;
    transition: transform 0.3s ease;
}

.hero-section .btn-cta:hover i {
    transform: translateX(5px);
}

/* ===========================
   INTRODUCTION SECTION
   =========================== */
.intro-section {
    padding: var(--section-padding-desktop) 0;
    background-color: var(--landing-white);
}

.intro-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--landing-primary);
    margin-bottom: 1.5rem;
}

.intro-section .lead {
    font-size: 1.25rem;
    color: var(--landing-dark);
    opacity: 0.85;
    margin-bottom: 2rem;
}

.intro-section .feature-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.intro-section .feature-icon i {
    font-size: 2rem;
    color: white;
}

.intro-section .col:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

/* ===========================
   FEATURES SECTION
   =========================== */
.features-section {
    padding: var(--section-padding-desktop) 0;
    background-color: var(--landing-light);
}

.features-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--landing-primary);
    margin-bottom: 3rem;
}

.feature-card {
    background-color: var(--landing-white);
    border-radius: 15px;
    padding: 2rem;
    height: 100%;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--landing-primary);
}

.feature-card img {
    width: 100%;
    border-radius: 10px;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.feature-card h4 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--landing-primary);
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--landing-dark);
    opacity: 0.8;
    line-height: 1.6;
}

.feature-card .badge {
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
}

/* ===========================
   GAMIFICATION SECTION
   =========================== */
.gamification-section {
    padding: var(--section-padding-desktop) 0;
    background: var(--gradient-success);
    color: white;
    position: relative;
    overflow: hidden;
}

.gamification-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%23ffffff' fill-opacity='0.05' fill-rule='evenodd'/%3E%3C/svg%3E");
    opacity: 0.4;
}

.gamification-section .container {
    position: relative;
    z-index: 1;
}

.gamification-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.gamification-section .lead {
    font-size: 1.25rem;
    opacity: 0.95;
    margin-bottom: 3rem;
}

.gamification-card {
    background-color: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    height: 100%;
}

body.dark-mode .gamification-card {
    background-color: rgba(45, 49, 57, 0.95);
}

.gamification-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.gamification-card .icon-badge {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.gamification-card .icon-badge i {
    font-size: 2.5rem;
    color: white;
}

.gamification-card h4 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--landing-primary);
    margin-bottom: 1rem;
}

.gamification-card p {
    color: var(--landing-dark);
    opacity: 0.85;
}

.gamification-section img {
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    width: 100%;
}

/* ===========================
   TESTIMONIALS SECTION
   =========================== */
.testimonials-section {
    padding: var(--section-padding-desktop) 0;
    background-color: var(--landing-white);
}

.testimonials-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--landing-primary);
    margin-bottom: 3rem;
}

.testimonial-card {
    background-color: var(--landing-light);
    border-radius: 15px;
    padding: 2rem;
    height: 100%;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    position: relative;
}

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

.testimonial-card::before {
    content: '\f10e';
    font-family: 'bootstrap-icons';
    position: absolute;
    top: 1rem;
    left: 1.5rem;
    font-size: 3rem;
    color: var(--landing-accent);
    opacity: 0.2;
}

.testimonial-card .quote-text {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--landing-dark);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    position: relative;
    z-index: 1;
}

.testimonial-card .author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.testimonial-card .author-avatar {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.25rem;
}

.testimonial-card .author-info h5 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--landing-primary);
    margin-bottom: 0.25rem;
}

.testimonial-card .author-info p {
    font-size: 0.9rem;
    color: var(--landing-dark);
    opacity: 0.7;
    margin-bottom: 0;
}

.testimonial-card .rating {
    color: #ffc107;
    font-size: 1.2rem;
    margin-top: 1rem;
}

/* ===========================
   FINAL CTA SECTION
   =========================== */
.cta-section {
    padding: var(--section-padding-desktop) 0;
    background: var(--gradient-primary);
    color: white;
    text-align: center;
}

.cta-section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-section .lead {
    font-size: 1.25rem;
    opacity: 0.95;
    margin-bottom: 2rem;
}

.cta-section .btn-cta-large {
    padding: 1.25rem 4rem;
    font-size: 1.5rem;
    font-weight: 700;
    border-radius: 50px;
    background-color: white;
    color: var(--landing-primary);
    border: none;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    display: inline-block;
}

.cta-section .btn-cta-large:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.4);
    text-decoration: none;
    color: var(--landing-primary);
}

.cta-section .free-badge {
    display: inline-block;
    background-color: var(--landing-success);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    margin-top: 1.5rem;
    box-shadow: var(--shadow-md);
}

/* ===========================
   FOOTER
   =========================== */
.landing-footer {
    background-color: var(--landing-dark);
    color: var(--landing-light);
}

body.dark-mode .landing-footer {
    background-color: #0f1115;
}

.landing-footer h5,
.landing-footer h6 {
    font-weight: 700;
    margin-bottom: 1rem;
}

.landing-footer a {
    transition: all 0.3s ease;
}

.landing-footer a:hover {
    color: var(--landing-accent) !important;
    transform: translateX(5px);
    display: inline-block;
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */
@media (max-width: 992px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }

    .hero-section .lead {
        font-size: 1.25rem;
    }

    .features-section h2,
    .intro-section h2,
    .gamification-section h2,
    .testimonials-section h2,
    .cta-section h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding-desktop: var(--section-padding-mobile);
    }

    .hero-section {
        padding: 120px 0 60px;
        min-height: 70vh;
    }

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

    .hero-section .lead {
        font-size: 1.1rem;
    }

    .hero-section .btn-cta {
        padding: 0.875rem 2rem;
        font-size: 1.1rem;
    }

    .features-section h2,
    .intro-section h2,
    .gamification-section h2,
    .testimonials-section h2,
    .cta-section h2 {
        font-size: 1.75rem;
    }

    .cta-section .btn-cta-large {
        padding: 1rem 2.5rem;
        font-size: 1.25rem;
    }

    .feature-card,
    .gamification-card,
    .testimonial-card {
        margin-bottom: 1.5rem;
    }
}

@media (max-width: 576px) {
    .hero-section h1 {
        font-size: 1.75rem;
    }

    .hero-section .lead {
        font-size: 1rem;
    }

    .landing-navbar .navbar-brand {
        font-size: 1.25rem;
    }

    .theme-switch-wrapper {
        gap: 5px;
    }

    .theme-icon {
        font-size: 1rem;
    }
}

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

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.animate-fade-in {
    animation: fadeInUp 0.6s ease-out;
}

.animate-pulse {
    animation: pulse 2s ease-in-out infinite;
}

/* ===========================
   UTILITIES
   =========================== */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-divider {
    height: 3px;
    width: 80px;
    background: var(--gradient-primary);
    margin: 1.5rem auto;
    border-radius: 2px;
}