/* ========================================
   CADA UM - Autism Spectrum Disorder Website
   Main Stylesheet
   ======================================== */

/* ========================================
   1. ROOT VARIABLES & GLOBAL STYLES
   ======================================== */
:root {
    /* Autism Spectrum Colors */
    --color-red: #f16a75;
    --color-orange: #c78d23;
    --color-yellow: #d6db55;
    --color-green: #82eb69;
    --color-blue: #8b7cf1;
    --color-purple: #9370DB;
    --color-indigo: #5f2887;
    
    
    /* Gradient Colors */
    --gradient-autism: linear-gradient(135deg, #c45b34, #f3b33e, #ceb531, #36a936, #2c78c3, #6b51a1);
    --gradient-soft: linear-gradient(135deg, rgba(255,69,0,0.1), rgba(255,165,0,0.1), rgba(255,215,0,0.1), rgba(50,205,50,0.1), rgba(30,144,255,0.1), rgba(147,112,219,0.1));
    
    /* Text Colors */
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-white: #ffffff;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    
    /* Font Families */
    --font-primary: 'Poppins', sans-serif;
    --font-secondary: 'Fredoka', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-round: 50%;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.15);
    --shadow-colored: 0 10px 30px rgba(255,165,0,0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* ========================================
   2. TYPOGRAPHY
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-secondary);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

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-md);
    color: var(--text-secondary);
}

/* ========================================
   3. NAVIGATION
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
}

.nav-brand {
    display: flex;
    align-items: center;
}

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

.puzzle-logo {
    display: grid;
    grid-template-columns: 20px 20px;
    grid-template-rows: 20px 20px;
    gap: 2px;
    transform: rotate(-5deg);
    transition: transform 0.3s ease;
}

.puzzle-logo:hover {
    transform: rotate(0deg) scale(1.1);
}

.puzzle-piece {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.piece-1 { background: var(--color-red); }
.piece-2 { background: var(--color-yellow); }
.piece-3 { background: var(--color-green); }
.piece-4 { background: var(--color-blue); }

.brand-text {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-autism);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 3px;
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    padding: var(--spacing-sm) 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--gradient-autism);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link.btn-primary {
    background: var(--gradient-autism);
    color: white;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

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

/* ========================================
   4. HERO SECTION
   ======================================== */
.hero {
    min-height: 100vh;
    padding: calc(80px + var(--spacing-xxl)) 0 var(--spacing-xxl);
    background: var(--gradient-soft);
    position: relative;
    overflow: hidden;
}

.puzzle-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: 0;
}

.floating-puzzle {
    position: absolute;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-sm);
    opacity: 0.3;
    animation: float 15s infinite ease-in-out;
}

.piece-float-1 {
    background: var(--color-red);
    top: 10%;
    left: 5%;
    animation-delay: 0s;
}

.piece-float-2 {
    background: var(--color-orange);
    top: 20%;
    right: 10%;
    animation-delay: 2s;
}

.piece-float-3 {
    background: var(--color-yellow);
    bottom: 30%;
    left: 10%;
    animation-delay: 4s;
}

.piece-float-4 {
    background: var(--color-green);
    bottom: 20%;
    right: 5%;
    animation-delay: 6s;
}

.piece-float-5 {
    background: var(--color-blue);
    top: 50%;
    left: 50%;
    animation-delay: 8s;
}

.piece-float-6 {
    background: var(--color-purple);
    top: 70%;
    right: 20%;
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    25% {
        transform: translateY(-20px) rotate(90deg);
    }
    50% {
        transform: translateY(10px) rotate(180deg);
    }
    75% {
        transform: translateY(-10px) rotate(270deg);
    }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    margin-bottom: var(--spacing-lg);
}

.rainbow-text {
    background: var(--gradient-autism);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: block;
    font-size: 1.2em;
}

.hero-highlight {
    color: var(--color-blue);
    display: block;
    font-size: 1.4em;
    font-weight: 800;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-purple);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-family: var(--font-primary);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.btn-primary {
    background: var(--gradient-autism);
    color: white;
    box-shadow: var(--shadow-colored);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(255,165,0,0.4);
}

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

.btn-secondary:hover {
    background: var(--color-blue);
    color: white;
    transform: translateY(-3px);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.1rem;
}

.stats-container {
    display: flex;
    gap: var(--spacing-xl);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.stat-item i {
    font-size: 2rem;
    color: var(--color-orange);
    margin-bottom: var(--spacing-sm);
}

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

.stat-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.hero-logo-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}

.main-puzzle-logo {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    transform: rotate(-5deg);
    transition: transform 0.5s ease;
}

.main-puzzle-logo:hover {
    transform: rotate(0deg) scale(1.05);
}

.puzzle-grid {
    display: grid;
    grid-template-columns: 100px 100px;
    grid-template-rows: 100px 100px;
    gap: 5px;
    margin-bottom: var(--spacing-lg);
}

.puzzle-tile {
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tile-1 { background: var(--color-red); }
.tile-2 { background: var(--color-yellow); }
.tile-3 { background: var(--color-green); }
.tile-4 { background: var(--color-blue); }

.smile-face {
    font-size: 3rem;
}

.logo-text {
    text-align: center;
    font-size: 2rem;
    background: var(--gradient-autism);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.rainbow-bear {
    position: absolute;
    bottom: -20px;
    right: -20px;
    font-size: 4rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* ========================================
   5. ABOUT TEA SECTION
   ======================================== */
.about-tea {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-secondary);
}

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

.section-title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-md);
}

.puzzle-icon {
    font-size: 2.5rem;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--color-blue);
    font-weight: 500;
}

.tea-definition {
    margin-bottom: var(--spacing-xxl);
}

.definition-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border-left: 5px solid;
    border-image: var(--gradient-autism) 1;
}

.definition-text {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.characteristics-title {
    color: var(--color-orange);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-size: 1.8rem;
}

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

.char-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    text-align: center;
    border-top: 4px solid;
}

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

.char-card i {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.char-card h4 {
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
}

.char-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.red-card {
    border-color: var(--color-red);
}
.red-card i { color: var(--color-red); }
.red-card h4 { background: var(--color-red); }

.orange-card {
    border-color: var(--color-orange);
}
.orange-card i { color: var(--color-orange); }
.orange-card h4 { background: var(--color-orange); }

.yellow-card {
    border-color: var(--color-yellow);
}
.yellow-card i { color: var(--color-yellow); }
.yellow-card h4 { 
    background: var(--color-yellow);
    color: var(--text-primary);
}

.green-card {
    border-color: var(--color-green);
}
.green-card i { color: var(--color-green); }
.green-card h4 { background: var(--color-green); }

.blue-card {
    border-color: var(--color-blue);
}
.blue-card i { color: var(--color-blue); }
.blue-card h4 { background: var(--color-blue); }

.important-info {
    max-width: 800px;
    margin: 0 auto;
}

.info-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--color-purple);
}

.info-card i {
    font-size: 2rem;
    color: var(--color-purple);
    margin-bottom: var(--spacing-md);
}

.info-card h3 {
    color: var(--color-purple);
    margin-bottom: var(--spacing-lg);
}

.info-card ul {
    list-style: none;
}

.info-card li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--text-secondary);
}

.info-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-green);
    font-weight: bold;
}

/* ========================================
   6. FEATURES SECTION
   ======================================== */
.features {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--gradient-autism);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    background: var(--gradient-autism);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon i {
    font-size: 2.5rem;
    color: white;
}

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

.feature-list {
    list-style: none;
    text-align: left;
    margin-top: var(--spacing-lg);
}

.feature-list li {
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: var(--spacing-lg);
}

.feature-list li::before {
    content: '🧩';
    position: absolute;
    left: 0;
}

/* ========================================
   7. HOW IT WORKS SECTION
   ======================================== */
.how-it-works {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-secondary);
}

.process-timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto var(--spacing-xxl);
}

.process-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-autism);
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-xxl);
    position: relative;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-number {
    width: 60px;
    height: 60px;
    background: white;
    border: 3px solid;
    border-color: var(--color-blue);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--color-blue);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.timeline-content {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 45%;
    position: relative;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: auto;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: auto;
}

.timeline-content h3 {
    color: var(--color-blue);
    margin-bottom: var(--spacing-sm);
}

.timeline-icon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2rem;
    opacity: 0.1;
}

.timeline-item:nth-child(odd) .timeline-icon {
    right: var(--spacing-lg);
}

.timeline-item:nth-child(even) .timeline-icon {
    left: var(--spacing-lg);
}

.cta-section {
    text-align: center;
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 800px;
    margin: 0 auto;
}

.cta-section h3 {
    color: var(--color-purple);
    margin-bottom: var(--spacing-lg);
}

.cta-section p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xl);
}

/* ========================================
   8. TESTIMONIALS SECTION
   ======================================== */
.testimonials {
    padding: var(--spacing-xxl) 0;
    background: white;
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.testimonial-card {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    position: relative;
}

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

.testimonial-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.testimonial-avatar {
    width: 60px;
    height: 60px;
    background: var(--gradient-autism);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
}

.testimonial-avatar i {
    font-size: 2rem;
    color: white;
}

.testimonial-info h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.testimonial-info p {
    color: var(--color-blue);
    font-size: 0.9rem;
}

.testimonial-content {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.quote-icon {
    position: absolute;
    left: 0;
    top: 0;
    color: var(--color-orange);
    opacity: 0.3;
    font-size: 1.5rem;
}

.testimonial-content p {
    font-style: italic;
    line-height: 1.8;
}

.testimonial-rating {
    display: flex;
    gap: var(--spacing-xs);
}

.testimonial-rating i {
    color: var(--color-yellow);
    font-size: 1.2rem;
}

/* ========================================
   9. CONTACT SECTION
   ======================================== */
.contact {
    padding: var(--spacing-xxl) 0;
    background: var(--bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xxl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.info-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.info-item i {
    width: 50px;
    height: 50px;
    background: var(--gradient-autism);
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.info-item h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.social-link {
    width: 50px;
    height: 50px;
    background: white;
    border-radius: var(--radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-blue);
    font-size: 1.5rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.social-link:hover {
    background: var(--gradient-autism);
    color: white;
    transform: translateY(-5px);
}

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

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-blue);
    box-shadow: 0 0 0 3px rgba(30,144,255,0.1);
}

.btn-block {
    width: 100%;
}

/* ========================================
   10. FOOTER
   ======================================== */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

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

.footer-section h3,
.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-lg);
}

.footer-section p {
    color: rgba(255,255,255,0.8);
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section ul li a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--color-yellow);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.puzzle-logo-footer {
    font-size: 2rem;
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.newsletter-form input {
    flex: 1;
    padding: var(--spacing-sm);
    border: none;
    border-radius: var(--radius-sm);
}

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

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--color-yellow);
}

/* ========================================
   11. BACK TO TOP BUTTON
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-autism);
    border: none;
    border-radius: var(--radius-round);
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ========================================
   12. RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: white;
        flex-direction: column;
        padding: var(--spacing-xl);
        transition: left 0.3s ease;
        box-shadow: var(--shadow-xl);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .stats-container {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
    
    .process-timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .timeline-item:nth-child(even) {
        flex-direction: column;
    }
    
    .timeline-number {
        left: 20px;
    }
    
    .timeline-content {
        width: calc(100% - 60px);
        margin-left: 60px !important;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .characteristic-cards {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   13. ANIMATIONS
   ======================================== */
[data-aos] {
    transition-property: transform, opacity;
}

.fade-in {
    animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ========================================
   14. UTILITIES
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mt-5 { margin-top: var(--spacing-xxl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.mb-5 { margin-bottom: var(--spacing-xxl); }

.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }
.p-5 { padding: var(--spacing-xxl); }

/* ========================================
   15. PRINT STYLES
   ======================================== */
@media print {
    .navbar,
    .back-to-top,
    .hero-buttons,
    .contact-form,
    .social-links {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    h1, h2, h3 {
        page-break-after: avoid;
    }
    
    .characteristic-cards,
    .features-grid {
        display: block;
    }
    
    .char-card,
    .feature-card {
        page-break-inside: avoid;
        margin-bottom: 1rem;
    }
}