/* ==========================================
   MuscXP Theme Variables & Base Configs
   ========================================== */
:root {
    --bg-primary: #030303;      /* Deep pitch black background */
    --bg-secondary: #0a0812;    /* Dark violet/purple-black background */
    --bg-card: #0e0c17;         /* Flat slate-purple for cards */
    --color-primary: #7c3aed;   /* Premium Violet Purple */
    --color-primary-hover: #9333ea;
    --color-accent-yellow: #eeff00; /* Sparse Branding Yellow */
    --text-main: #ffffff;
    --text-muted: #9ca3af;
    --text-secondary: #cbd5e1;
    --border-color: rgba(255, 255, 255, 0.05);
    --border-hover: rgba(124, 58, 237, 0.3);
    --font-family: 'Outfit', sans-serif;
    --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-main);
    font-family: var(--font-family);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    line-height: 1.5;
}

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

/* ==========================================
   Reusable UI Components
   ========================================== */
.badge {
    display: inline-block;
    background: rgba(124, 58, 237, 0.15);
    border: 1px solid rgba(124, 58, 237, 0.3);
    color: #a78bfa;
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 16px;
    width: fit-content;
}

/* Centered section headers */
.section-header-centered {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: 50px;
    padding: 0 20px;
}

.section-title-centered {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--text-main);
    margin-top: 10px;
}

/* ==========================================
   Header / Navigation Bar
   ========================================== */
.main-header {
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 100;
    background: rgba(3, 3, 3, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 18px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-main);
}

.header-logo-img {
    width: 28px;
    height: 28px;
    object-fit: contain;
    border-radius: 6px;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.logo-text span {
    color: var(--color-accent-yellow); /* Branding yellow on suffix */
}

/* Nav Menu links */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition-smooth);
}

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

/* Professor Login Button (PC only) */
.professor-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    border: 1px solid var(--color-primary);
    padding: 8px 18px;
    border-radius: 50px;
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.professor-btn .btn-icon {
    width: 16px;
    height: 16px;
    stroke: var(--color-primary);
    transition: var(--transition-smooth);
}

.professor-btn:hover {
    background: var(--color-primary);
    color: var(--text-main);
    transform: translateY(-1px);
}

.professor-btn:hover .btn-icon {
    stroke: var(--text-main);
}

/* ==========================================
   Hero Section
   ========================================== */
.hero-section {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    padding: 160px 25px 80px 25px;
    border-bottom: 1px solid var(--border-color);
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 50px;
}

.hero-content {
    flex: 1.1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1.5px;
    margin-bottom: 24px;
}

.purple-highlight {
    color: var(--color-primary);
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 35px;
    font-weight: 350;
    max-width: 520px;
}

/* App download badges */
.download-badges {
    display: flex;
    align-items: center;
    gap: 15px;
}

.store-badge img {
    height: 42px;
    transition: var(--transition-smooth);
}

.store-badge:hover img {
    transform: translateY(-2px);
}

.hero-image-wrapper {
    flex: 0.9;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-mockup-img {
    max-height: 520px;
    object-fit: contain;
    width: auto;
}

/* ==========================================
   Features / Recursos Section
   ========================================== */
.features-section {
    padding: 100px 25px;
    max-width: 1200px;
    margin: 0 auto;
    border-bottom: 1px solid var(--border-color);
}

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

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 35px;
    border-radius: 16px;
    transition: var(--transition-smooth);
}

.feature-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
}

.feature-icon-wrapper {
    width: 46px;
    height: 46px;
    background: rgba(124, 58, 237, 0.1);
    color: var(--color-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.feature-icon-wrapper svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ==========================================
   Developers / Creators Section (Adaptive)
   ========================================== */
.dev-section {
    padding: 100px 25px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.dev-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 60px;
}

.dev-info-side {
    flex: 1.1;
}

.dev-section-title {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 40px;
}

.dev-blocks {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.dev-block {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.dev-icon {
    flex-shrink: 0;
}

.avatar-letter {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    font-weight: 800;
}

.dev-avatar-img {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    object-fit: cover;
    display: block;
}

.letter-xp {
    background: var(--color-primary);
    color: #ffffff;
}

.letter-classic {
    background: #ffffff;
    color: #000000;
}

.dev-block-text h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.dev-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 12px;
}

/* Social link capsules */
.ig-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 6px 14px;
    border-radius: 50px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.ig-icon {
    width: 14px;
    height: 14px;
}

.ig-badge:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #ffffff;
    transform: scale(1.02);
}

.dev-image-side {
    flex: 0.9;
}

.dev-gym-img {
    border-radius: 0;
    width: 100%;
    height: auto;
    max-height: 550px;
    object-fit: contain;
    border: none;
}

/* ==========================================
   Evolution / Results Section
   ========================================== */
.evolution-section {
    padding: 100px 25px;
    max-width: 1200px;
    margin: 0 auto;
    border-bottom: 1px solid var(--border-color);
}

.evolution-container {
    display: flex;
    align-items: center;
    gap: 60px;
}

.evolution-image-side {
    flex: 0.9;
    display: flex;
    justify-content: center;
}

.evolution-mockup-img {
    max-height: 460px;
    object-fit: contain;
}

.evolution-content-side {
    flex: 1.1;
}

.evolution-title {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 25px;
}

.evolution-checklist {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.evolution-checklist li {
    display: flex;
    align-items: center;
    gap: 12px;
}

.check-icon {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    color: #ffffff;
    background-color: var(--color-primary);
    border-radius: 50%;
    padding: 4px;
}

.evolution-checklist li span {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* ==========================================
   Testimonials / Depoimentos Section
   ========================================== */
.testimonials-section {
    padding: 100px 25px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.testimonials-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.testimonial-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.stars {
    color: var(--color-primary);
    font-size: 0.95rem;
    margin-bottom: 18px;
    letter-spacing: 2px;
}

.testimonial-text {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 24px;
    font-style: italic;
}

.testimonial-user {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar-text {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--color-primary);
}

.user-name {
    font-size: 0.95rem;
    font-weight: 600;
}

.user-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ==========================================
   Bottom CTA Banner
   ========================================== */
.bottom-cta-banner {
    padding: 60px 25px;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
}

.cta-banner-container {
    max-width: 1200px;
    margin: 0 auto;
    background: linear-gradient(135deg, #4c1d95 0%, #2e1065 100%);
    border-radius: 24px;
    padding: 50px 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 30px;
}

.cta-banner-left {
    display: flex;
    align-items: center;
    gap: 25px;
}

.cta-banner-logo-img {
    width: 48px;
    height: 48px;
    object-fit: contain;
    border-radius: 8px;
    flex-shrink: 0;
}

.cta-banner-left h2 {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 6px;
}

.cta-banner-left p {
    color: #c084fc;
    font-size: 1rem;
    font-weight: 500;
}

/* ==========================================
   Footer Section
   ========================================== */
.main-footer {
    background-color: var(--bg-primary);
    padding: 80px 25px 40px 25px;
}

.footer-top-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: 50px;
    margin-bottom: 60px;
}

.footer-info-col {
    max-width: 320px;
}

.footer-desc {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-top: 20px;
    margin-bottom: 25px;
}

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

.social-links a {
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.social-links a svg {
    width: 16px;
    height: 16px;
}

.social-links a:hover {
    color: #ffffff;
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.footer-links-grid {
    display: flex;
    gap: 80px;
}

.footer-links-col h4 {
    font-size: 0.95rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.footer-links-col {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links-col a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
}

.footer-links-col a:hover {
    color: var(--text-main);
}

.footer-bottom-bar {
    max-width: 1200px;
    margin: 0 auto;
    border-top: 1px solid var(--border-color);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom-bar p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ==========================================
   Mobile Sticky/Floating Bottom CTA Button
   ========================================== */
.mobile-cta-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 15px 20px 30px 20px;
    background: linear-gradient(to top, rgba(3, 3, 3, 1) 75%, rgba(3, 3, 3, 0) 100%);
    z-index: 99;
}

.cta-container {
    max-width: 600px;
    margin: 0 auto;
}

.app-btn-mobile {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    width: 100%;
    background-color: var(--color-primary);
    color: var(--text-main);
    text-decoration: none;
    padding: 16px;
    border-radius: 14px;
    font-size: 1.05rem;
    font-weight: 700;
    border: none;
    transition: var(--transition-smooth);
}

.app-btn-mobile .btn-icon {
    width: 18px;
    height: 18px;
    stroke: var(--text-main);
}

.app-btn-mobile:hover, .app-btn-mobile:active {
    background-color: var(--color-primary-hover);
    transform: scale(0.98);
}

/* ==========================================
   Responsive Rules (Media Queries)
   ========================================== */

/* PC / Tablet Landscape Screen sizes (>= 992px) */
@media screen and (min-width: 992px) {
    .mobile-cta-footer {
        display: none;
    }
    
    #professor-desktop-btn {
        display: flex;
    }
}

/* Medium & Small screens (< 992px) */
@media screen and (max-width: 991px) {
    /* Layout adjustments */
    .hero-container {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }
    
    .hero-content {
        align-items: center;
    }
    
    .hero-title {
        font-size: 2.75rem;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-mockup-img {
        max-height: 420px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .dev-container {
        flex-direction: column;
        gap: 40px;
    }
    
    .dev-image-side {
        width: 100%;
    }
    
    .evolution-container {
        flex-direction: column-reverse;
        text-align: center;
        gap: 40px;
    }
    
    .evolution-checklist {
        align-items: center;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .cta-banner-container {
        flex-direction: column;
        text-align: center;
        padding: 40px 30px;
    }
    
    .cta-banner-left {
        flex-direction: column;
        gap: 15px;
    }
}

/* Mobile Screen sizes (< 768px) */
@media screen and (max-width: 767px) {
    body {
        padding-bottom: 100px; /* Leave space for sticky bottom mobile button */
    }
    
    .nav-menu {
        display: none; /* Hide top links menu on mobile */
    }
    
    #professor-desktop-btn {
        display: none; /* Hide header button on mobile */
    }
    
    .mobile-cta-footer {
        display: block;
    }
    
    .hero-section {
        padding-top: 120px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-top-container {
        flex-direction: column;
        gap: 40px;
    }
    
    .footer-links-grid {
        flex-wrap: wrap;
        gap: 40px;
    }
    
    .section-title-centered,
    .dev-section-title,
    .evolution-title {
        font-size: 1.8rem;
    }
}