/* ============================================
   CROSS15 - MAIN STYLESHEET
   Modern Fitness & Training Platform
   ============================================ */

/* ============================================
   CSS VARIABLES - DESIGN TOKENS
   ============================================ */
:root {
    /* Color Palette */
    --color-primary: #B8E986;
    /* Softer Green - Primary Brand (antes: #CFFF00) */
    --color-primary-dark: #9ACC6A;
    /* Darker Green (antes: #A8D600) */
    --color-bg-dark: #0A0A0A;
    /* Deep Black Background */
    --color-bg-secondary: #1A1A1A;
    /* Secondary Dark */
    --color-bg-card: #141414;
    /* Card Background */
    --color-text-primary: #FFFFFF;
    /* White Text */
    --color-text-secondary: #B0B0B0;
    /* Gray Text */
    --color-text-muted: #707070;
    /* Muted Gray */
    --color-accent-red: #FF3B3B;
    /* Accent Red */

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Bebas Neue', 'Impact', sans-serif;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 64px;
    --spacing-2xl: 96px;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(207, 255, 0, 0.3);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    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-dark);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

h1 {
    font-size: clamp(3rem, 8vw, 6rem);
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: clamp(1.8rem, 4vw, 3rem);
    margin-bottom: var(--spacing-sm);
}

h4 {
    font-size: clamp(1.4rem, 3vw, 2rem);
    margin-bottom: var(--spacing-sm);
}

p {
    font-size: 1rem;
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

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

ul {
    list-style: none;
}

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

/* ============================================
   UTILITY CLASSES
   ============================================ */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.container-wide {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

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

.text-gradient {
    background: linear-gradient(135deg, var(--color-primary) 0%, #FFFFFF 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-padding {
    padding: var(--spacing-2xl) 0;
}

.section-padding-sm {
    padding: var(--spacing-xl) 0;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-block;
    padding: 16px 40px;
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-bg-dark);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(207, 255, 0, 0.5);
}

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

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

.btn-ghost {
    background: transparent;
    color: var(--color-text-primary);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

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

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    transition: all var(--transition-base);
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.navbar.scrolled {
    padding: var(--spacing-sm) 0;
    background: rgba(10, 10, 10, 0.95);
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    height: 100%;
}

.logo {
    height: 50px;
    transition: var(--transition-base);
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.nav-action-link {
    color: var(--color-text-secondary);
    transition: var(--transition-base);
    display: flex;
    align-items: center;
}

.nav-action-link:hover {
    color: var(--color-primary);
    transform: translateY(-2px);
}

.nav-divider {
    color: rgba(255, 255, 255, 0.2);
    font-weight: 300;
}

.nav-links a {
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-secondary);
    position: relative;
    white-space: nowrap;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-base);
}

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

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

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 30px;
    height: 3px;
    background: var(--color-primary);
    transition: var(--transition-base);
    border-radius: 2px;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 100px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg,
            rgba(10, 10, 10, 0.8) 0%,
            rgba(10, 10, 10, 0.6) 50%,
            rgba(10, 10, 10, 0.9) 100%);
    z-index: 1;
}

.hero-background img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-tag {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(207, 255, 0, 0.1);
    border: 1px solid var(--color-primary);
    border-radius: 50px;
    color: var(--color-primary);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.hero h1 {
    margin-bottom: var(--spacing-md);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* ============================================
   CARDS & GRID LAYOUTS
   ============================================ */
.card {
    background: var(--color-bg-card);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(207, 255, 0, 0.3);
    box-shadow: var(--shadow-lg);
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease-out forwards;
}

.fade-in {
    animation: fadeIn 1s ease-out forwards;
}

.slide-in-left {
    animation: slideInLeft 0.8s ease-out forwards;
}

.slide-in-right {
    animation: slideInRight 0.8s ease-out forwards;
}

/* ============================================
   FOOTER
   ============================================ */
footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: var(--spacing-2xl);
}

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

.footer-col h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.2rem;
}

.footer-col a {
    display: block;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
    transition: var(--transition-fast);
}

.footer-col a:hover {
    color: var(--color-primary);
    transform: translateX(5px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 1024px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        left: auto;
        transform: none;
        width: 300px;
        height: 100vh;
        background: var(--color-bg-dark);
        flex-direction: column;
        justify-content: center;
        gap: var(--spacing-md);
        transition: right var(--transition-base);
        border-left: 1px solid rgba(255, 255, 255, 0.1);
    }

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

    .menu-toggle {
        display: flex;
    }

    .hero {
        padding-top: 120px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 48px;
        --spacing-2xl: 64px;
    }

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

    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
}