/* Variables CSS */
:root {
    /* Colores principales del logo */
    --brand-orange: #f97316;
    --brand-orange-light: #fb923c;
    --brand-orange-dark: #ea580c;
    --brand-blue: #0891b2;
    --brand-blue-light: #06b6d4;
    --brand-blue-dark: #0e7490;
    
    /* Colores de fondo y estructura */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-glass: rgba(15, 23, 42, 0.8);
    --bg-card: rgba(30, 41, 59, 0.6);
    
    /* Colores de texto */
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-dark: #1e293b;
    
    /* Gradientes */
    --gradient-bg: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #334155 100%);
    --gradient-orange: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    --gradient-blue: linear-gradient(135deg, #0891b2 0%, #0e7490 100%);
    --gradient-card: linear-gradient(145deg, rgba(30, 41, 59, 0.8) 0%, rgba(51, 65, 85, 0.4) 100%);
    
    /* Sombras */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 20px rgba(249, 115, 22, 0.3);
    
    /* Espaciado y tamaños */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transiciones */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-cubic: cubic-bezier(0.4, 0, 0.2, 1);
}

/* RESET Y BASE */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    background-image: var(--gradient-bg);
    background-attachment: fixed;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    width: 100%;
    max-width: 100vw;
    left: 0 !important;
    right: 0 !important;
    transform: none !important;
    margin: 0;
    padding: 0;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('corredores2.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    opacity: 0.04;
    z-index: -1;
    pointer-events: none;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Space Grotesk', sans-serif;
    line-height: 1.2;
    font-weight: 600;
    color: var(--text-primary);
}

a {
    color: var(--brand-orange);
    text-decoration: none;
    transition: var(--transition-normal);
}

a:hover {
    color: var(--brand-orange-light);
}

main {
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
    position: relative;
    left: 0;
    right: 0;
}

/* PARTÍCULAS DE FONDO */

.particles-bg {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--brand-blue);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 15s infinite linear;
}

@keyframes float {
    0% {
        transform: translateY(100vh) scale(0);
        opacity: 0;
    }
    10% {
        opacity: 0.3;
    }
    90% {
        opacity: 0.3;
    }
    100% {
        transform: translateY(-10vh) scale(1);
        opacity: 0;
    }
}

/* HEADER Y NAVEGACIÓN*/

.header {
    position: fixed;
    top: 0;
    left: 0 !important;
    right: 0 !important;
    z-index: 1000;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(249, 115, 22, 0.1);
    transition: var(--transition-normal);
    transform: none !important;
    width: 100%;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition-normal);
}

.logo:hover {
    transform: scale(1.02);
}

.header-logo {
    height: 48px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
    text-decoration: none;
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(249, 115, 22, 0.1);
    transform: translateY(-1px);
}

.nav-cta {
    background: var(--gradient-orange) !important;
    color: var(--text-primary) !important;
    padding: var(--spacing-sm) var(--spacing-lg) !important;
    border-radius: var(--radius-full) !important;
    box-shadow: var(--shadow-glow);
    font-weight: 600;
}

.nav-cta:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 0 30px rgba(249, 115, 22, 0.5) !important;
}

.nav-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    flex-direction: column;
    gap: 4px;
}

.nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-normal);
}

/*HERO SECTION */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px var(--spacing-lg) var(--spacing-3xl);
    text-align: center;
    position: relative;
    overflow: hidden;
    scroll-margin-top: 70px;
}

#homeSection {
    min-height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    scroll-margin-top: 70px;
}

.hero-container {
    max-width: 1200px;
    width: 100%;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    animation: fadeInUp 1s ease-out;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(8, 145, 178, 0.15);
    border: 1px solid var(--brand-blue);
    color: var(--brand-blue-light);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xl);
    backdrop-filter: blur(10px);
}

.badge-icon {
    font-size: 1.2rem;
}

.hero-logo-large {
    margin-bottom: var(--spacing-xl);
}

.hero-logo {
    width: clamp(280px, 60vw, 450px);
    height: auto;
    max-width: 100%;
    filter: drop-shadow(0 10px 25px rgba(0, 0, 0, 0.3));
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    line-height: 1.1;
}

.title-highlight {
    background: var(--gradient-orange);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.125rem, 2.5vw, 1.375rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
    line-height: 1.6;
}

.hero-cta-group {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    font-size: 1.125rem;
    font-weight: 700;
    cursor: pointer;
    border: none;
    transition: var(--transition-normal);
    text-decoration: none;
    white-space: nowrap;
    text-align: center;
    box-sizing: border-box;
}

.hero-cta.primary {
    background: var(--gradient-orange);
    color: var(--text-primary);
    box-shadow: var(--shadow-glow);
}

.hero-cta.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(249, 115, 22, 0.4);
}

.hero-cta.secondary {
    background: transparent;
    color: var(--brand-blue-light);
    border: 2px solid var(--brand-blue);
}

.hero-cta.secondary:hover {
    background: rgba(8, 145, 178, 0.1);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

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

.stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--brand-orange);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(249, 115, 22, 0.3);
}

/* FEATURES SECTION */

.features-section {
    padding: var(--spacing-3xl) var(--spacing-lg);
    position: relative;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-lg);
}

.section-header p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

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

.feature-card {
    background: var(--gradient-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    border: 1px solid rgba(249, 115, 22, 0.1);
    backdrop-filter: blur(20px);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--gradient-orange);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-2xl);
    border-color: rgba(249, 115, 22, 0.3);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-orange);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

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

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* SCIENCE SECTION */

.science-section {
    padding: var(--spacing-3xl) var(--spacing-lg);
    background: rgba(30, 41, 59, 0.3);
    backdrop-filter: blur(10px);
}

.science-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.science-text h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.science-lead {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.7;
}

.science-points {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.science-point {
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.point-number {
    min-width: 48px;
    height: 48px;
    background: var(--gradient-blue);
    color: var(--text-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
}

.point-content h4 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.point-content p {
    color: var(--text-secondary);
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
}

.formula-card {
    background: var(--gradient-card);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    border: 1px solid rgba(8, 145, 178, 0.3);
    backdrop-filter: blur(20px);
}

.formula-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    color: var(--brand-blue-light);
    text-align: center;
}

.formula {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.formula-line {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    font-family: 'Monaco', 'Courier New', monospace;
}

.formula-line.total {
    border-top: 2px solid var(--brand-orange);
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.variable {
    font-weight: 600;
    color: var(--brand-orange);
    min-width: 100px;
}

.operator {
    color: var(--text-muted);
    font-weight: 700;
}

.equation {
    color: var(--text-secondary);
}

/* CALCULATOR SECTION */

.calculator-section {
    width: 100%;
    min-height: 100vh;
    padding: 120px var(--spacing-lg) var(--spacing-3xl);
    display: none;
}

.calculator-container {
    max-width: 800px;
    width: 100%;
    margin: 0 auto;
    background: var(--gradient-card);
    border-radius: var(--radius-2xl);
    padding: var(--spacing-2xl);
    border: 1px solid rgba(249, 115, 22, 0.1);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-2xl);
}

.back-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-bottom: 20px;
}

.back-button:hover {
    background: #0056b3;
}

.calculator-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.calculator-disclaimer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    background: rgba(249, 115, 22, 0.1);
    color: var(--brand-orange);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xl);
    border: 1px solid rgba(249, 115, 22, 0.2);
}

.progress-container {
    margin-bottom: var(--spacing-2xl);
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.progress-fill {
    height: 100%;
    background: var(--gradient-orange);
    transition: width 0.5s ease-in-out;
    border-radius: var(--radius-sm);
}

.progress-labels {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.progress-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: var(--transition-normal);
}

.progress-label.active {
    color: var(--brand-orange);
}

.step-circle {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid var(--text-muted);
    transition: var(--transition-normal);
}

.progress-label.active .step-circle {
    background: var(--brand-orange);
    border-color: var(--brand-orange);
    color: var(--text-primary);
}

/* WIZARD FORM */

.wizard-form {
    margin-top: var(--spacing-xl);
}

.step-container {
    display: none;
    animation: fadeIn 0.5s var(--transition-cubic);
}

.step-container.step-active {
    display: block;
}

.step-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.step-title {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.step-description {
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
    width: 100%;
    box-sizing: border-box;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
    box-sizing: border-box;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.form-group input,
.form-group select {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    transition: var(--transition-normal);
    backdrop-filter: blur(10px);
    width: 100%;
    box-sizing: border-box;
    min-width: 0;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--brand-orange);
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.1);
    background: rgba(255, 255, 255, 0.08);
}

.form-group small {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.form-group input.error,
.form-group select.error {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.error-message {
    color: #ef4444;
    font-size: 0.8rem;
    margin-top: var(--spacing-xs);
    display: none;
}

/* Estilos para tooltips informativos */
.info-tooltip {
    display: inline-block;
    margin-left: 6px;
    font-size: 0.9rem;
    color: var(--brand-orange);
    cursor: help;
    opacity: 0.7;
    transition: opacity 0.2s ease;
    position: relative;
}

.info-tooltip:hover {
    opacity: 1;
}

.info-tooltip[title]:hover::after {
    content: attr(title);
    position: absolute;
    left: 50%;
    bottom: 150%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: normal;
    white-space: nowrap;
    max-width: 300px;
    white-space: normal;
    width: max-content;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
}

.info-tooltip[title]:hover::before {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 142%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: rgba(0, 0, 0, 0.9);
    z-index: 1001;
}

.step-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* BOTONES */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition-normal);
    text-decoration: none;
    white-space: nowrap;
    min-height: 44px;
    text-align: center;
    box-sizing: border-box;
}

.btn-primary {
    background: var(--gradient-orange);
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: transparent;
    border: 1px solid var(--brand-blue);
    color: var(--brand-blue-light);
}

.btn-secondary:hover {
    background: rgba(8, 145, 178, 0.1);
    transform: translateY(-1px);
}

.btn-tertiary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-tertiary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

/* RESULTS SECTION */

.results-section {
    min-height: 100vh;
    padding: 120px var(--spacing-lg) var(--spacing-3xl);
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s ease;
    background: var(--gradient-bg); 
}

.results-section.force-show {
    opacity: 1 !important;
    visibility: visible !important;
    display: block !important;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.results-header h2 {
    font-size: 2.5rem;
    color: var(--text-primary);
    background: var(--gradient-orange);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.results-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.results-content {
    display: block;
    padding: var(--spacing-2xl);
    background: var(--gradient-card); 
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(249, 115, 22, 0.1); 
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-2xl); 
    max-width: 1200px;
    margin: 0 auto;
    color: var(--text-primary);
}

.results-summary {
    margin-bottom: var(--spacing-3xl);
    padding: var(--spacing-xl);
    background: rgba(30, 41, 59, 0.5); 
    border-radius: var(--radius-xl);
    border: 1px solid rgba(8, 145, 178, 0.2); 
}

.results-summary h3 {
    font-size: 1.5rem;
    color: var(--brand-blue-light); 
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

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

.summary-item {
    text-align: center;
    padding: var(--spacing-xl);
    background: rgba(249, 115, 22, 0.05); 
    border-radius: var(--radius-lg);
    border: 1px solid rgba(249, 115, 22, 0.1);
    transition: var(--transition-normal);
}

.summary-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--brand-orange); 
}

.summary-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--brand-orange); 
    margin-bottom: var(--spacing-sm);
}

.summary-label {
    font-size: 1rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.scientific-validation {
    margin-top: var(--spacing-3xl);
}

.scientific-validation h3 {
    font-size: 1.5rem;
    color: var(--brand-blue-light); 
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.phase-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.hour-block-simple {
    padding: var(--spacing-xl);
    background: var(--gradient-card); 
    border-radius: var(--radius-lg);
    border-left: 4px solid #007bff; 
    border: 1px solid rgba(8, 145, 178, 0.1);
    transition: var(--transition-normal);
}

.hour-block-simple:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--brand-blue-light); 
}

.hour-block-simple h4 {
    margin-bottom: var(--spacing-md);
    color: var(--brand-orange); 
    font-size: 1.25rem;
}

.hour-block-simple h5 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-size: 1.125rem;
}

.hour-block-simple p {
    margin: var(--spacing-sm) 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

.hour-block-simple small {
    color: var(--text-muted);
    font-style: italic;
    font-size: 0.875rem;
}

/* RESPONSIVE DESIGN - MOBILE FIRST */

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav {
        padding: 0 var(--spacing-md);
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--bg-glass);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding-top: var(--spacing-2xl);
        transition: left 0.3s ease;
        border-top: 1px solid rgba(249, 115, 22, 0.1);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    /* Hero Section Mobile */
    .hero {
        padding: 120px var(--spacing-md) var(--spacing-3xl);
        text-align: center;
    }
    
    .hero-container {
        padding: 0;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .stat-divider {
        display: none;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .form-group.full-width {
        grid-column: 1;
        width: 100%;
    }
    
    .form-group input,
    .form-group select {
        width: 100%;
        box-sizing: border-box;
        min-width: 0;
    }
    
    /* Calculator Mobile */
    .calculator-container {
        padding: var(--spacing-lg);
        margin: var(--spacing-md);
    }
    
    .progress-labels {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
    
    .progress-label {
        font-size: 0.875rem;
    }
    
    /* Results Mobile */
    .results-content {
        padding: var(--spacing-lg);
        margin: var(--spacing-md);
    }
    
    .summary-grid {
        grid-template-columns: 1fr;
    }
    
    .results-header {
        flex-direction: column;
        text-align: center;
    }
    
    .results-actions {
        width: 100%;
        justify-content: center;
    }
    
    /* Features Mobile */
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .features-section {
        padding: var(--spacing-2xl) var(--spacing-md);
    }
}

/* Tablet Adjustments */
@media (max-width: 1024px) and (min-width: 769px) {
    .hero {
        padding: 120px var(--spacing-lg) var(--spacing-3xl);
    }
    
    .form-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-md);
    }
    
    .form-group input,
    .form-group select {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .step-actions {
        gap: var(--spacing-md);
    }
    
    .btn {
        text-align: center;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
}

/* Small Mobile Adjustments */
@media (max-width: 480px) {
    .hero-logo {
        width: clamp(240px, 80vw, 320px);
    }
    
    .hero-title {
        font-size: clamp(1.75rem, 7vw, 2.25rem);
        line-height: 1.2;
    }
    
    .hero-subtitle {
        font-size: clamp(1rem, 4vw, 1.125rem);
    }
    
    .hero-cta {
        width: 100%;
        max-width: 300px;
    }
    
    .nav {
        padding: 0 var(--spacing-sm);
    }
    
    .calculator-disclaimer {
        font-size: 0.875rem;
        padding: var(--spacing-md);
    }
    
    .step-title {
        font-size: 1.5rem;
    }
    
    /* Extra mobile form fixes */
    .form-grid {
        gap: var(--spacing-md);
        padding: 0;
        margin: 0 0 var(--spacing-xl) 0;
    }
    
    .form-group {
        margin-bottom: var(--spacing-sm);
    }
    
    .form-group label {
        font-size: 0.85rem;
        margin-bottom: var(--spacing-xs);
    }
    
    .form-group input,
    .form-group select {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
        min-height: 44px;
    }
    
    .step-container {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .btn {
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        min-height: 44px;
        box-sizing: border-box;
        width: auto;
    }
    
    .btn span,
    .btn svg {
        display: flex;
        align-items: center;
    }
    
    .step-actions {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: stretch;
    }
    
    .step-actions .btn {
        width: 100%;
        max-width: none;
    }
    
    .hero-cta {
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
        text-align: center;
        box-sizing: border-box;
    }
    
    .hero-cta span {
        display: flex;
        align-items: center;
        width: 100%;
        justify-content: center;
    }
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.footer-text p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.privacy-content {
    background: var(--gradient-card);
    border-radius: var(--radius-2xl);
    padding: 2rem;
    backdrop-filter: blur(20px);
    border: 1px solid rgba(249, 115, 22, 0.1);
    max-width: 900px;
    margin: 2rem auto;
}

/* Loading Spinner Styles */
.loading-spinner {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    backdrop-filter: blur(5px);
}

.spinner-container {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: var(--radius-2xl);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(20px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(249, 115, 22, 0.2);
    border-left: 4px solid var(--brand-orange);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

.spinner-container p {
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 500;
    margin: 0 0 0.5rem 0;
    opacity: 0.9;
}

.spinner-container small {
    color: var(--text-muted);
    font-size: 0.9rem;
    opacity: 0.7;
    display: block;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}