/* ===================================
   YouTube Thumbnail Downloader
   Main Stylesheet
   =================================== */

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #FF0000;
    --primary-dark: #CC0000;
    --secondary-color: #282828;
    --text-dark: #0F0F0F;
    --text-light: #606060;
    --bg-light: #F9F9F9;
    --white: #FFFFFF;
    --border-color: #E5E5E5;
    --success-color: #00A152;
    --error-color: #E53935;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}

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

a {
    text-decoration: none;
    color: inherit;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-brand i {
    font-size: 2rem;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-dark);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 0;
    position: relative;
}

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

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background-color: var(--primary-color);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.95;
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--text-dark) 100%);
    color: var(--white);
    padding: 3rem 0;
    text-align: center;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.page-header p {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Main Content */
.main-content {
    padding: 3rem 0;
    min-height: calc(100vh - 400px);
}

/* Downloader Card */
.downloader-card {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 2rem;
    margin-bottom: 3rem;
}

.card-header {
    text-align: center;
    margin-bottom: 2rem;
}

.card-header h2 {
    color: var(--text-dark);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.card-header p {
    color: var(--text-light);
    font-size: 1rem;
}

/* Input Section */
.input-section {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.input-wrapper {
    flex: 1;
    position: relative;
}

.input-wrapper i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

.input-wrapper input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Buttons */
.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

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

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

.btn-download {
    background-color: var(--success-color);
    color: var(--white);
    padding: 1rem 1.5rem;
    flex-direction: column;
    gap: 0.25rem;
}

.btn-download:hover {
    background-color: #008C45;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-reset {
    background-color: var(--text-light);
    color: var(--white);
    width: 100%;
    margin-top: 1rem;
}

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

.quality-label {
    font-weight: 600;
    font-size: 0.9rem;
}

.quality-res {
    font-size: 0.75rem;
    opacity: 0.9;
}

/* Error Message */
.error-msg {
    background-color: #FFEBEE;
    color: var(--error-color);
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    display: none;
}

.error-msg.show {
    display: block;
}

/* Preview Section */
.preview-section {
    margin-top: 2rem;
    animation: fadeIn 0.5s ease;
}

.preview-section h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.thumbnail-preview {
    text-align: center;
    margin-bottom: 2rem;
}

.thumbnail-preview img {
    max-width: 100%;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    margin: 0 auto;
}

/* Download Section */
.download-section {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: 12px;
}

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

/* Info Sections */
.info-section {
    margin-bottom: 3rem;
}

.info-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.step-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s ease;
    position: relative;
}

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

.step-number {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.step-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.step-card h3 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.step-card p {
    color: var(--text-light);
}

/* Features Section */
.features-section {
    background-color: var(--bg-light);
    padding: 3rem 2rem;
    border-radius: 12px;
}

.features-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.feature-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

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

/* Content Pages */
.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.content-section {
    margin-bottom: 3rem;
}

.content-section h2 {
    color: var(--text-dark);
    font-size: 1.8rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.content-section h3 {
    color: var(--text-dark);
    font-size: 1.4rem;
    margin-bottom: 0.75rem;
    margin-top: 1.5rem;
}

.content-section h4 {
    color: var(--text-dark);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    margin-top: 1rem;
}

.content-section p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.content-section ul,
.content-section ol {
    margin-left: 2rem;
    margin-bottom: 1rem;
    color: var(--text-light);
}

.content-section li {
    margin-bottom: 0.5rem;
    line-height: 1.8;
}

.disclaimer-notice {
    background-color: #FFF3E0;
    border-left: 4px solid #FF9800;
    padding: 1rem 1.5rem;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-radius: 8px;
}

.disclaimer-notice i {
    color: #FF9800;
    font-size: 1.5rem;
}

.contact-info-box {
    background-color: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    margin-top: 1rem;
}

.contact-info-box p {
    margin-bottom: 0.5rem;
}

.contact-info-box strong {
    color: var(--text-dark);
}

/* Feature List Items */
.features-list {
    margin-top: 1.5rem;
}

.feature-item {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 1rem;
    background-color: var(--bg-light);
    border-radius: 8px;
}

.feature-item i {
    color: var(--success-color);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.feature-item h3 {
    color: var(--text-dark);
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.feature-item p {
    color: var(--text-light);
    margin-bottom: 0;
}

/* User Types */
.user-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.user-type-card {
    background-color: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
}

.user-type-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.user-type-card h3 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.user-type-card p {
    color: var(--text-light);
}

/* Contact Page */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.contact-info h2 {
    color: var(--text-dark);
    font-size: 2rem;
    margin-bottom: 1rem;
}

.contact-methods {
    margin: 2rem 0;
}

.contact-method {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    padding: 1rem;
    background-color: var(--bg-light);
    border-radius: 8px;
}

.contact-method i {
    font-size: 1.5rem;
    color: var(--primary-color);
    flex-shrink: 0;
}

.contact-method h3 {
    color: var(--text-dark);
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.contact-method p {
    color: var(--text-light);
    margin: 0;
}

.social-contact {
    margin-top: 2rem;
}

.social-contact h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
}

/* Contact Form */
.contact-form-wrapper h2 {
    color: var(--text-dark);
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.contact-form {
    background-color: var(--white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

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

.form-group label {
    display: block;
    color: var(--text-dark);
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

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

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

.form-message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    display: none;
}

.form-message.success {
    background-color: #E8F5E9;
    color: var(--success-color);
    display: block;
}

.form-message.error {
    background-color: #FFEBEE;
    color: var(--error-color);
    display: block;
}

/* FAQ Section */
.faq-section {
    margin-top: 3rem;
}

.faq-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-dark);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.faq-item {
    background-color: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
}

.faq-item h3 {
    color: var(--text-dark);
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.faq-item h3 i {
    color: var(--primary-color);
}

.faq-item p {
    color: var(--text-light);
    margin: 0;
}

/* Footer */
.footer {
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 3rem 0 1rem;
    margin-top: 3rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-section h3 i {
    color: var(--primary-color);
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: var(--white);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 1rem;
}

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

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

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    transition: color 0.3s ease;
}

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

.footer-section ul li i {
    margin-right: 0.5rem;
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 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;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--white);
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
        box-shadow: var(--shadow-lg);
        display: none;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu li {
        padding: 0.75rem 20px;
    }

    .nav-menu a.active::after {
        display: none;
    }

    .hero h1,
    .page-header h1 {
        font-size: 1.8rem;
        flex-direction: column;
        gap: 0.5rem;
    }

    .hero p,
    .page-header p {
        font-size: 1rem;
    }

    .input-section {
        flex-direction: column;
    }

    .download-grid {
        grid-template-columns: 1fr;
    }

    .steps-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }

    .contact-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .downloader-card,
    .contact-form {
        padding: 1.5rem;
    }

    .hero,
    .page-header {
        padding: 2rem 0;
    }

    .btn {
        padding: 0.875rem 1.5rem;
    }
}