/**
 * Hotel Metric Theme - Main Stylesheet
 * Version 2.0.0 - Complete Rebuild
 * Professional, modern, and fully responsive
 */

/* ==========================================
   CSS VARIABLES (Design System)
   ========================================== */
:root {
    /* Colors */
    --color-primary: #FFD700;
    --color-primary-dark: #E6C200;
    --color-bg-dark: #0f0f1e;
    --color-bg-darker: #1a1a2e;
    --color-bg-light: #f5f5f5;
    --color-text-white: #ffffff;
    --color-text-dark: #1a1a1a;
    --color-text-gray: #666666;
    --color-border: rgba(255, 255, 255, 0.1);
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    --font-size-small: 14px;
    --font-size-large: 18px;
    --line-height-base: 1.6;
    --line-height-heading: 1.2;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-header: 1000;
    --z-overlay: 900;
    --z-modal: 1100;
}

/* ==========================================
   RESET & BASE STYLES
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: var(--line-height-base);
    color: var(--color-text-dark);
    background-color: var(--color-bg-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ==========================================
   TYPOGRAPHY
   ========================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: var(--line-height-heading);
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

p {
    margin-bottom: var(--spacing-sm);
}

/* ==========================================
   LAYOUT
   ========================================== */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

/* ==========================================
   HEADER & NAVIGATION
   ========================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(15, 15, 30, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: var(--z-header);
    transition: var(--transition-base);
}

.site-header.scrolled {
    background: rgba(15, 15, 30, 1);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.nav-menu {
    display: flex;
}

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

.nav-link {
    color: var(--color-text-white);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-primary);
    background: rgba(255, 215, 0, 0.1);
}

.nav-cta {
    background: var(--color-primary);
    color: var(--color-text-dark);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 600;
}

.nav-cta:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-xs);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-text-white);
    border-radius: 2px;
    transition: var(--transition-base);
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-align: center;
    transition: var(--transition-base);
    cursor: pointer;
}

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

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

.btn-secondary {
    background: transparent;
    color: var(--color-text-white);
    border: 2px solid var(--color-text-white);
}

.btn-secondary:hover {
    background: var(--color-text-white);
    color: var(--color-text-dark);
}

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

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

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: var(--font-size-large);
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-darker) 100%);
    color: var(--color-text-white);
    padding-top: 70px;
    position: relative;
    overflow: hidden;
}

/* Hero background image (optional) */
.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../images/hero-background.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0.15;
    z-index: 0;
}

.hero-section.has-background::before {
    opacity: 0.3;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    text-align: center;
}

.hero-title {
    color: var(--color-text-white);
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: var(--font-size-large);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-scroll {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
}

.scroll-indicator {
    display: block;
    width: 40px;
    height: 40px;
    border: 2px solid var(--color-primary);
    border-radius: 50%;
    color: var(--color-primary);
    font-size: 1.5rem;
    line-height: 36px;
    text-align: center;
    animation: bounce 2s infinite;
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ==========================================
   SECTION STYLES
   ========================================== */
.section-title {
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-dark);
}

.section-subtitle {
    text-align: center;
    font-size: var(--font-size-large);
    color: var(--color-text-gray);
    margin-bottom: var(--spacing-lg);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-cta {
    text-align: center;
    margin-top: var(--spacing-lg);
}

/* Dark sections */
.hero-section,
.metodo-section,
.faq-section {
    background: var(--color-bg-dark);
    color: var(--color-text-white);
}

.hero-section .section-title,
.metodo-section .section-title,
.faq-section .section-title {
    color: var(--color-text-white);
}

.hero-section .section-subtitle,
.metodo-section .section-subtitle,
.faq-section .section-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

/* Light sections */
.problema-section,
.soluzione-section,
.calcolatore-section,
.servizi-section,
.risultati-section,
.chi-sono-section,
.contatti-section {
    background: var(--color-bg-light);
}

/* ==========================================
   PROBLEMA SECTION
   ========================================== */
.section-intro,
.section-target,
.section-conclusion {
    font-size: var(--font-size-large);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    text-align: center;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.questions-list {
    max-width: 800px;
    margin: var(--spacing-lg) auto;
    padding: var(--spacing-lg);
    background: var(--color-text-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

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

.questions-list ul {
    list-style: none;
}

.questions-list li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-md);
    position: relative;
    font-size: var(--font-size-large);
    color: var(--color-text-dark);
}

.questions-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

/* ==========================================
   FEATURES GRID
   ========================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feature-card {
    background: var(--color-text-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    color: var(--color-text-gray);
    line-height: 1.8;
}

/* ==========================================
   CALCULATOR SECTION
   ========================================== */
.calculator-box {
    max-width: 800px;
    margin: 0 auto;
    background: var(--color-text-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.calculator-form {
    margin-bottom: var(--spacing-md);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-dark);
}

.form-group input,
.form-group textarea {
    padding: 0.75rem;
    border: 2px solid #e0e0e0;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.calculator-result {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 2px solid #e0e0e0;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.result-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--color-bg-light);
    border-radius: var(--radius-md);
}

.result-item.highlight {
    background: var(--color-primary);
}

.result-label {
    display: block;
    font-size: var(--font-size-small);
    font-weight: 600;
    text-transform: uppercase;
    color: var(--color-text-gray);
    margin-bottom: var(--spacing-xs);
}

.result-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-dark);
}

/* ==========================================
   STEPS GRID (Metodo)
   ========================================== */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.step-card {
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition-base);
}

.step-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-5px);
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--color-primary);
    color: var(--color-text-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.step-card h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.step-card p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.8;
}

/* ==========================================
   PRICING GRID (Servizi)
   ========================================== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.pricing-card {
    background: var(--color-text-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
}

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

.pricing-card.featured {
    border: 3px solid var(--color-primary);
    position: relative;
}

.pricing-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-primary);
    color: var(--color-text-dark);
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: var(--font-size-small);
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
}

.pricing-badge.popular {
    background: var(--color-primary);
}

.pricing-badge.premium {
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
}

.pricing-title {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xs);
}

.pricing-subtitle {
    font-weight: 600;
    color: var(--color-text-gray);
    margin-bottom: var(--spacing-sm);
}

.pricing-description {
    color: var(--color-text-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.pricing-features {
    list-style: none;
    margin: var(--spacing-md) 0;
    flex-grow: 1;
}

.pricing-features li {
    padding: 0.5rem 0;
    color: var(--color-text-dark);
    line-height: 1.6;
}

.section-note {
    text-align: center;
    margin-top: var(--spacing-lg);
    font-style: italic;
    color: var(--color-text-gray);
}

/* ==========================================
   STATS GRID (Risultati)
   ========================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.stat-card {
    background: var(--color-text-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition-base);
}

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

.stat-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-weight: 700;
    font-size: var(--font-size-small);
    text-transform: uppercase;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-sm);
}

.stat-description {
    color: var(--color-text-gray);
    line-height: 1.6;
}

.cta-text {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.cta-subtext {
    color: var(--color-text-gray);
    margin-bottom: var(--spacing-md);
}

/* ==========================================
   CHI SONO SECTION
   ========================================== */
.chi-sono-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.chi-sono-name {
    color: var(--color-primary);
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.chi-sono-role {
    font-size: var(--font-size-large);
    color: var(--color-text-gray);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.chi-sono-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    gap: var(--spacing-lg);
    align-items: flex-start;
}

.chi-sono-photo {
    flex: 0 0 300px;
    position: sticky;
    top: 100px;
}

.chi-sono-photo .profile-photo {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 4px solid var(--color-primary);
}

.chi-sono-text {
    flex: 1;
}

.chi-sono-content p {
    font-size: var(--font-size-large);
    line-height: 2;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-dark);
}

.competenze-box {
    background: var(--color-text-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-top: var(--spacing-lg);
}

.competenze-box h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.competenze-list li {
    padding: 0.5rem 0;
    color: var(--color-text-dark);
    line-height: 1.8;
}

/* ==========================================
   FAQ SECTION
   ========================================== */
.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    transition: var(--transition-base);
}

.faq-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

.faq-question {
    width: 100%;
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: left;
    font-size: var(--font-size-large);
    font-weight: 600;
    color: var(--color-text-white);
    cursor: pointer;
    transition: var(--transition-fast);
}

.faq-icon {
    color: var(--color-primary);
    font-size: 1.5rem;
    font-weight: 700;
    transition: var(--transition-base);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq-item.active .faq-answer {
    max-height: 1000px;
}

.faq-answer p {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.8;
}

/* ==========================================
   CONTACT FORM
   ========================================== */
.contact-form-wrapper {
    max-width: 700px;
    margin: 0 auto;
}

.contact-form {
    background: var(--color-text-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.checkbox-group {
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-sm);
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.checkbox-group label {
    margin: 0;
    font-weight: 400;
}

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 600;
}

.form-message.success {
    background: #d4edda;
    color: #155724;
}

.form-message.error {
    background: #f8d7da;
    color: #721c24;
}

/* ==========================================
   FOOTER
   ========================================== */
.site-footer {
    background: var(--color-bg-darker);
    color: var(--color-text-white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.footer-title {
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.7);
}

.footer-contact h4,
.footer-links h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.footer-contact p {
    margin-bottom: var(--spacing-xs);
}

.footer-contact a,
.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition-fast);
}

.footer-contact a:hover,
.footer-links a:hover {
    color: var(--color-primary);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    color: rgba(255, 255, 255, 0.6);
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 768px) {
    /* Navigation */
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 100%;
        max-width: 300px;
        height: calc(100vh - 70px);
        background: var(--color-bg-darker);
        padding: var(--spacing-md);
        transition: var(--transition-base);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-links {
        flex-direction: column;
        align-items: stretch;
    }
    
    .nav-link {
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
    }
    
    /* Hero */
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-cta .btn {
        width: 100%;
        max-width: 300px;
    }
    
    /* Grids */
    .features-grid,
    .steps-grid,
    .pricing-grid,
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    /* Chi Sono */
    .chi-sono-content {
        flex-direction: column;
    }
    
    .chi-sono-photo {
        flex: 0 0 auto;
        width: 100%;
        max-width: 300px;
        margin: 0 auto var(--spacing-lg);
        position: static;
    }
    
    /* Form */
    .form-row {
        grid-template-columns: 1fr;
    }
    
    /* Spacing */
    section {
        padding: var(--spacing-lg) 0;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-base: 14px;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
    }
    
    .btn-large {
        padding: 1rem 2rem;
    }
}

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.text-center {
    text-align: center;
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }