/* ===== GOOGLE FONTS ===== */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

/* ===== VARIABLES ===== */
:root {
    /* Colors */
    --primary-color: #FD3132;
    --primary-light: #ff6b6b;
    --primary-dark: #e02a2b;
    --secondary-color: #2A3D66;
    --text-color: #333333;
    --text-color-light: #777777;
    --white-color: #FFFFFF;
    --light-color: #F5F7FA;
    --gray-color: #EEEEEE;
    --dark-color: #1E293B;
    
    /* Typography */
    --body-font: 'Poppins', sans-serif;
    --h1-font-size: 3.5rem;
    --h2-font-size: 2.5rem;
    --h3-font-size: 1.5rem;
    --h4-font-size: 1.25rem;
    --normal-font-size: 1rem;
    --small-font-size: 0.875rem;
    --smaller-font-size: 0.75rem;
    
    /* Font weight */
    --font-light: 300;
    --font-regular: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
    
    /* Margins */
    --mb-0-25: 0.25rem;
    --mb-0-5: 0.5rem;
    --mb-1: 1rem;
    --mb-1-5: 1.5rem;
    --mb-2: 2rem;
    --mb-2-5: 2.5rem;
    --mb-3: 3rem;
    
    /* Z-index */
    --z-tooltip: 10;
    --z-fixed: 100;
    
    /* Shadows */
    --shadow-small: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 5px 15px rgba(0, 0, 0, 0.07);
    --shadow-large: 0 10px 30px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 0.3s ease;
    --transition-normal: 0.5s ease;
    
    /* Border Radius */
    --radius-small: 4px;
    --radius-medium: 8px;
    --radius-large: 16px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
}

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

h1, h2, h3, h4 {
    font-weight: var(--font-semibold);
    line-height: 1.3;
    color: var(--text-color);
}

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

a:hover {
    color: var(--primary-color);
}

ul {
    list-style: none;
}

button, input, textarea {
    font-family: var(--body-font);
    font-size: var(--normal-font-size);
    outline: none;
    border: none;
}

button {
    cursor: pointer;
}

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

/* ===== REUSABLE CLASSES ===== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.section {
    padding: 6rem 0 2rem;
}

.section-heading {
    text-align: center;
    margin-bottom: 4rem;
}

.section-heading h6 {
    display: inline-block;
    background-color: rgba(253, 49, 50, 0.1);
    color: var(--primary-color);
    font-size: var(--small-font-size);
    font-weight: var(--font-semibold);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-heading h2 {
    font-size: var(--h2-font-size);
    margin-bottom: 1rem;
    font-weight: var(--font-bold);
}

.section-heading p {
    max-width: 600px;
    margin: 0 auto;
    color: var(--text-color-light);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: var(--font-medium);
    transition: var(--transition-fast);
    cursor: pointer;
}

.btn i {
    margin-left: 0.5rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    color: var(--white-color);
    box-shadow: 0 5px 15px rgba(253, 49, 50, 0.3);
    transform: translateY(-3px);
}

.btn-primary-sm {
    padding: 0.5rem 1rem;
    font-size: var(--small-font-size);
}

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

.btn-secondary:hover {
    background-color: #223357;
    color: var(--white-color);
    box-shadow: 0 5px 15px rgba(42, 61, 102, 0.3);
    transform: translateY(-3px);
}

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

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-3px);
}

.btn-outline-light {
    background-color: transparent;
    color: var(--white-color);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline-light:hover {
    border-color: var(--white-color);
    color: var(--white-color);
    transform: translateY(-3px);
}

.btn-youtube {
    background-color: #FF0000;
    color: var(--white-color);
}

.btn-youtube:hover {
    background-color: #cc0000;
    color: var(--white-color);
    box-shadow: 0 5px 15px rgba(255, 0, 0, 0.3);
    transform: translateY(-3px);
}

.btn-block {
    width: 100%;
}

/* ===== HEADER ===== */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--white-color);
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-small);
    transition: var(--transition-fast);
}

.header-scrolled {
    padding: 0.75rem 0;
    box-shadow: var(--shadow-medium);
}

nav {
    height: 4.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
}

.logo {
    width: 45px;
    margin-right: 0.75rem;
}

.logo-text h1 {
    font-size: 1.5rem;
    font-weight: var(--font-bold);
    color: var(--primary-color);
    margin-bottom: 0;
}

.logo-text p {
    font-size: var(--smaller-font-size);
    color: var(--text-color-light);
}

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

.nav-links {
    display: flex;
    margin-right: 2rem;
}

.nav-links a {
    margin: 0 1rem;
    font-weight: var(--font-medium);
    position: relative;
}

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

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

.auth-buttons {
    display: flex;
    gap: 1rem;
}

.mobile-menu-btn {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* ===== HERO SECTION ===== */
.hero {
    padding: 10rem 0 6rem;
    background-color: #f8f9fa;
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 4rem;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: var(--h1-font-size);
    font-weight: var(--font-bold);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-text p {
    font-size: 1.1rem;
    color: var(--text-color-light);
    margin-bottom: 2rem;
    max-width: 600px;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    gap: 2.5rem;
}

.stat-item h3 {
    font-size: 2rem;
    font-weight: var(--font-bold);
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-item p {
    font-size: var(--small-font-size);
    color: var(--text-color-light);
    margin-bottom: 0;
}

.hero-animation {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

#hero-lottie {
    width: 100%;
    max-width: 500px;
}

.hero-shape {
    position: absolute;
    bottom: -1px;
    height: 20%;
    left: 0;
    width: 100%;
    line-height: 0;
}

/* ===== FEATURES SECTION ===== */
.features {
    padding: 6rem 0;
}

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

.feature-card {
    background-color: var(--white-color);
    padding: 2rem;
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-medium);
    transition: var(--transition-fast);
    text-align: center;
}

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

.feature-icon {
    width: 70px;
    height: 70px;
    background-color: rgba(253, 49, 50, 0.1);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    font-size: 1.75rem;
}

.feature-card h3 {
    font-size: var(--h4-font-size);
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-color-light);
    font-size: var(--small-font-size);
}

/* ===== PRACTICE TESTS SECTION ===== */
.practice-tests {
    padding: 6rem 0;
    background-color: var(--light-color);
}

.test-tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 3rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background-color: var(--white-color);
    border-radius: var(--radius-full);
    font-weight: var(--font-medium);
    color: var(--text-color);
    cursor: pointer;
    transition: var(--transition-fast);
    border: 2px solid transparent;
}

.tab-btn.active, .tab-btn:hover {
    background-color: var(--primary-color);
    color: var(--white-color);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease forwards;
}

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

.test-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.test-card {
    background-color: var(--white-color);
    border-radius: var(--radius-medium);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    transition: var(--transition-fast);
}

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

.card-img {
    position: relative;
}

.card-img img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-small);
    font-size: var(--smaller-font-size);
    font-weight: var(--font-medium);
    text-transform: uppercase;
}

.card-badge.free {
    background-color: var(--primary-color);
    color: var(--white-color);
}

.card-body {
    padding: 1.5rem;
}

.card-body h3 {
    font-size: var(--h4-font-size);
    margin-bottom: 0.75rem;
}

.card-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: var(--smaller-font-size);
    color: var(--text-color-light);
}

.card-meta span {
    display: flex;
    align-items: center;
}

.card-meta i {
    margin-right: 0.5rem;
}

.card-body p {
    color: var(--text-color-light);
    font-size: var(--small-font-size);
    margin-bottom: 1.5rem;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.participants {
    font-size: var(--smaller-font-size);
    color: var(--text-color-light);
    display: flex;
    align-items: center;
}

.participants i {
    margin-right: 0.5rem;
    color: var(--primary-color);
}

.view-more {
    text-align: center;
    margin-top: 3rem;
}

/* ===== RESOURCES SECTION ===== */
.resources {
    padding: 6rem 0;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.resource-card {
    background-color: var(--white-color);
    border-radius: var(--radius-medium);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    transition: var(--transition-fast);
}

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

.resource-img img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.resource-body {
    padding: 1.5rem;
}

.resource-tag {
    display: inline-block;
    background-color: rgba(253, 49, 50, 0.1);
    color: var(--primary-color);
    font-size: var(--smaller-font-size);
    font-weight: var(--font-medium);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    margin-bottom: 1rem;
}

.resource-body h3 {
    font-size: var(--h4-font-size);
    margin-bottom: 0.75rem;
}

.resource-body p {
    color: var(--text-color-light);
    font-size: var(--small-font-size);
    margin-bottom: 1.5rem;
}

.resource-link {
    color: var(--primary-color);
    font-weight: var(--font-medium);
    font-size: var(--small-font-size);
    display: flex;
    align-items: center;
}

.resource-link i {
    margin-left: 0.5rem;
    transition: var(--transition-fast);
}

.resource-link:hover i {
    transform: translateX(5px);
}

.tip-of-the-day {
    background-color: var(--light-color);
    border-radius: var(--radius-large);
    padding: 3rem;
    display: flex;
    align-items: center;
    gap: 2rem;
}

.tip-content {
    flex: 1;
}

.tip-badge {
    display: inline-flex;
    align-items: center;
    background-color: var(--primary-color);
    color: var(--white-color);
    font-size: var(--small-font-size);
    font-weight: var(--font-medium);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    margin-bottom: 1.5rem;
}

.tip-badge i {
    margin-right: 0.5rem;
}

.tip-content h3 {
    font-size: var(--h3-font-size);
    margin-bottom: 1rem;
}

.tip-content p {
    color: var(--text-color-light);
    margin-bottom: 1.5rem;
    max-width: 600px;
}

.tip-animation {
    flex: 1;
    max-width: 400px;
}

#tip-lottie {
    width: 100%;
}

/* ===== WHY US SECTION ===== */
.why-us {
    padding: 6rem 0;
    background-color: var(--light-color);
}

.why-us-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.why-us-card {
    background-color: var(--white-color);
    padding: 2rem;
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-medium);
    transition: var(--transition-fast);
}

.why-us-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-large);
}

.why-us-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(253, 49, 50, 0.1);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.why-us-card h3 {
    font-size: var(--h4-font-size);
    margin-bottom: 1rem;
}

.why-us-card p {
    color: var(--text-color-light);
    font-size: var(--small-font-size);
}

.stats-counter {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 2rem;
}

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

.counter-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(253, 49, 50, 0.1);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.counter h3 {
    font-size: 2rem;
    font-weight: var(--font-bold);
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.counter p {
    color: var(--text-color-light);
    font-size: var(--small-font-size);
}

/* ===== TESTIMONIALS SECTION ===== */
.testimonials {
    padding: 6rem 0;
}

.testimonial-slider {
    display: flex;
    overflow: hidden;
    margin-bottom: 2rem;
}

.testimonial-card {
    flex: 0 0 100%;
    background-color: var(--white-color);
    border-radius: var(--radius-medium);
    padding: 2.5rem;
    box-shadow: var(--shadow-medium);
    transition: var(--transition-normal);
}

.testimonial-rating {
    margin-bottom: 1.5rem;
    color: #FFC107;
}

.testimonial-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color);
    margin-bottom: 1.5rem;
    font-style: italic;
    position: relative;
}

.testimonial-text::before {
    content: '"';
    font-size: 5rem;
    position: absolute;
    top: -2.5rem;
    left: -1rem;
    color: var(--primary-color);
    opacity: 0.1;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.author-img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    overflow: hidden;
    margin-right: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--light-color);
    color: var(--primary-color);
    font-size: 1.5rem;
}

.author-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-info h4 {
    font-weight: var(--font-semibold);
    margin-bottom: 0.25rem;
}

.author-info p {
    color: var(--text-color-light);
    font-size: var(--smaller-font-size);
}

.testimonial-dots {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--gray-color);
    cursor: pointer;
    transition: var(--transition-fast);
}

.dot.active {
    background-color: var(--primary-color);
    width: 25px;
    border-radius: var(--radius-full);
}

/* ===== CTA SECTION ===== */
.cta {
    padding: 6rem 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: var(--white-color);
    text-align: center;
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
}

.cta h2 {
    font-size: var(--h2-font-size);
    color: var(--white-color);
    margin-bottom: 1.5rem;
    font-weight: var(--font-bold);
}

.cta p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* ===== YOUTUBE CHANNEL SECTION ===== */
.youtube-channel {
    padding: 6rem 0;
}

.youtube-content {
    display: flex;
    align-items: center;
    gap: 3rem;
}

.youtube-preview {
    flex: 1;
    position: relative;
    border-radius: var(--radius-medium);
    overflow: hidden;
    box-shadow: var(--shadow-medium);
}

.youtube-preview img {
    width: 100%;
    height: auto;
    transition: var(--transition-fast);
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background-color: rgba(255, 0, 0, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white-color);
    font-size: 2.5rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.youtube-preview:hover img {
    transform: scale(1.05);
}

.youtube-preview:hover .play-button {
    background-color: #FF0000;
    box-shadow: 0 0 20px rgba(255, 0, 0, 0.5);
}

.youtube-info {
    flex: 1;
}

.youtube-info h3 {
    font-size: var(--h3-font-size);
    margin-bottom: 1.5rem;
}

.youtube-info p {
    color: var(--text-color-light);
    margin-bottom: 2rem;
}

.channel-features {
    margin-bottom: 2rem;
}

.channel-features li {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.channel-features i {
    color: var(--primary-color);
    margin-right: 1rem;
}

/* ===== CONTACT SECTION ===== */
.contact {
    padding: 6rem 0;
    background-color: var(--light-color);
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
}

.contact-card {
    background-color: var(--white-color);
    padding: 2rem;
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-medium);
    text-align: center;
    transition: var(--transition-fast);
}

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

.contact-icon {
    width: 60px;
    height: 60px;
    background-color: rgba(253, 49, 50, 0.1);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    font-size: 1.5rem;
}

.contact-card h3 {
    font-size: var(--h4-font-size);
    margin-bottom: 0.75rem;
}

.contact-card p, .contact-card a {
    color: var(--text-color-light);
    font-size: var(--small-font-size);
}

.contact-card a:hover {
    color: var(--primary-color);
}

.contact-form-container {
    background-color: var(--white-color);
    padding: 3rem;
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-medium);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: var(--font-medium);
    color: var(--text-color);
}

.form-group input, 
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--gray-color);
    border-radius: var(--radius-small);
    background-color: var(--white-color);
    color: var(--text-color);
    transition: var(--transition-fast);
}

.form-group input:focus, 
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(253, 49, 50, 0.1);
}

.form-group input::placeholder, 
.form-group textarea::placeholder {
    color: #aaa;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ===== NEWSLETTER SECTION ===== */
.newsletter {
    padding: 6rem 0;
    background-color: var(--secondary-color);
}

.newsletter-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 3rem;
}

.newsletter-text {
    flex: 1;
}

.newsletter-text h2 {
    font-size: var(--h3-font-size);
    color: var(--white-color);
    margin-bottom: 1rem;
}

.newsletter-text p {
    color: rgba(255, 255, 255, 0.8);
}

.newsletter-form {
    flex: 1;
    display: flex;
    gap: 1rem;
}

.newsletter-form input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: var(--radius-full);
    font-size: var(--normal-font-size);
}

.newsletter-form button {
    padding: 0 2rem;
}

/* ===== FOOTER SECTION ===== */
.footer {
    background-color: var(--dark-color);
    color: rgba(255, 255, 255, 0.8);
    padding: 6rem 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 4rem;
    margin-bottom: 4rem;
}

.about-column {
    grid-column: span 2;
}

.footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
}

.footer-logo img {
    width: 40px;
    margin-right: 1rem;
}

.footer-logo h3 {
    color: var(--white-color);
    font-size: 1.5rem;
}

.about-column p {
    margin-bottom: 1.5rem;
    color: rgba(255, 255, 255, 0.6);
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white-color);
    transition: var(--transition-fast);
}

.social-links a:hover {
    background-color: var(--primary-color);
    color: var(--white-color);
    transform: translateY(-5px);
}

.footer-column h3 {
    color: var(--white-color);
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.75rem;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background-color: var(--primary-color);
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: var(--small-font-size);
}

.copyright p {
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom-links {
    display: flex;
    gap: 1.5rem;
}

.footer-bottom-links a {
    color: rgba(255, 255, 255, 0.6);
}

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

/* ===== BACK TO TOP BUTTON ===== */
.back-to-top {
    position: fixed;
    right: 2rem;
    bottom: 2rem;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-medium);
    cursor: pointer;
    transition: var(--transition-fast);
    opacity: 0;
    visibility: hidden;
    z-index: 99;
}

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

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-5px);
}

/* ===== RESPONSIVE DESIGN ===== */
@media screen and (max-width: 1200px) {
    :root {
        --h1-font-size: 3rem;
        --h2-font-size: 2.25rem;
    }
    
    .container {
        padding: 0 3rem;
    }
}

@media screen and (max-width: 992px) {
    :root {
        --h1-font-size: 2.5rem;
        --h2-font-size: 2rem;
        --h3-font-size: 1.35rem;
    }
    
    .container {
        padding: 0 2rem;
    }
    
    .hero-content, 
    .tip-of-the-day, 
    .youtube-content, 
    .newsletter-content {
        flex-direction: column;
    }
    
    .hero-text {
        text-align: center;
    }
    
    .hero-cta, 
    .hero-stats {
        justify-content: center;
    }
    
    .about-column {
        grid-column: span 1;
    }
}

@media screen and (max-width: 768px) {
    :root {
        --h1-font-size: 2.25rem;
        --h2-font-size: 1.75rem;
        --h3-font-size: 1.25rem;
    }
    
    .container {
        padding: 0 1.5rem;
    }
    
    nav {
        position: relative;
    }
    
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--white-color);
        flex-direction: column;
        align-items: center;
        padding: 2rem 0;
        box-shadow: var(--shadow-medium);
        transform: translateY(-150%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition-fast);
        z-index: var(--z-fixed);
    }
    
    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links li {
        margin: 1rem 0;
    }
    
    .auth-buttons {
        margin-right: 1rem;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .nav-right {
        gap: 1rem;
    }
    
    .hero-content {
        gap: 2rem;
    }
    
    .test-tabs {
        gap: 0.5rem;
    }
    
    .tab-btn {
        padding: 0.75rem 1rem;
        font-size: var(--small-font-size);
    }
    
    .tip-of-the-day {
        padding: 2rem;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media screen and (max-width: 576px) {
    .auth-buttons {
        display: none;
    }
    
    .section-heading {
        margin-bottom: 3rem;
    }
    
    .hero-cta {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        justify-content: space-around;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .contact-form-container {
        padding: 2rem;
    }
}