/* CSS Variables */
:root {
    --primary: #ff0050;
    --primary-dark: #e60046;
    --secondary: #00f2ea;
    --dark: #121212;
    --dark-light: #1e1e1e;
    --gray: #6b7280;
    --gray-light: #9ca3af;
    --white: #ffffff;
    --background: #fafafa;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.15);
    --gradient: linear-gradient(135deg, #ff0050 0%, #ff7a00 100%);
    --gradient-secondary: linear-gradient(135deg, #00f2ea 0%, #0066ff 100%);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--white);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Navigation Bar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.navbar.scrolled {
    box-shadow: 0 4px 20px var(--shadow);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 800;
    color: var(--dark);
    text-decoration: none;
}

.logo svg {
    color: var(--primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    color: var(--gray);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--primary);
}

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

/* Language Selector */
.language-selector {
    position: relative;
}

.lang-button {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--background);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    cursor: pointer;
    font-family: 'Outfit', sans-serif;
    font-size: 14px;
    font-weight: 500;
    color: var(--dark);
    transition: all 0.3s ease;
}

.lang-button:hover {
    background: var(--white);
    border-color: var(--primary);
}

.dropdown-arrow {
    transition: transform 0.3s ease;
}

.lang-dropdown {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 12px;
    box-shadow: 0 10px 40px var(--shadow-lg);
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 100;
}

.lang-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: block;
    padding: 12px 20px;
    color: var(--gray);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.lang-option:first-child {
    border-radius: 12px 12px 0 0;
}

.lang-option:last-child {
    border-radius: 0 0 12px 12px;
}

.lang-option:hover {
    background: var(--background);
    color: var(--primary);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--dark);
    transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 60vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(255, 0, 80, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 242, 234, 0.05) 0%, transparent 50%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.title-line {
    animation: fadeInUp 0.8s ease-out;
}

.title-line:nth-child(2) {
    animation-delay: 0.2s;
}

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

.hero-subtitle {
    font-size: 20px;
    color: var(--gray);
    margin-bottom: 48px;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

/* Download Box */
.download-box {
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 20px;
    padding: 12px;
    box-shadow: 0 10px 40px var(--shadow);
    display: flex;
    gap: 12px;
    max-width: 700px;
    margin: 0 auto 32px;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.input-wrapper {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 20px;
    color: var(--gray);
}

.url-input {
    width: 100%;
    padding: 18px 20px 18px 52px;
    border: none;
    background: var(--background);
    border-radius: 12px;
    font-family: 'Outfit', sans-serif;
    font-size: 15px;
    color: var(--dark);
    outline: none;
    transition: all 0.3s ease;
}

.url-input:focus {
    background: var(--white);
    box-shadow: 0 0 0 2px var(--primary);
}

.paste-btn {
    position: absolute;
    right: 8px;
    padding: 10px;
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    cursor: pointer;
    color: var(--gray);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.download-btn {
    padding: 18px 40px;
    background: var(--gradient);
    border: none;
    border-radius: 12px;
    color: var(--white);
    font-family: 'Outfit', sans-serif;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.download-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(255, 0, 80, 0.3);
}

/* Loading Spinner */
.loading-spinner {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    margin: 32px 0;
    animation: fadeIn 0.3s ease-out;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--background);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Error Message */
.error-message {
    display: none;
    background: #fee;
    color: #c00;
    padding: 16px 24px;
    border-radius: 12px;
    margin: 24px auto;
    max-width: 700px;
    font-size: 14px;
    font-weight: 500;
    animation: fadeIn 0.3s ease-out;
}

/* Video Preview */
.video-preview {
    display: none;
    margin: 48px auto 0;
    animation: fadeInUp 0.5s ease-out;
}

.preview-card {
    background: var(--white);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 40px var(--shadow);
}

.preview-image {
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    background: var(--dark-light);
}

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

.preview-info {
    padding: 32px;
}

.preview-info h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--dark);
}

.download-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

.option-btn {
    padding: 16px 24px;
    background: var(--background);
    border: 2px solid transparent;
    border-radius: 12px;
    color: var(--dark);
    font-family: 'Outfit', sans-serif;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.option-btn:hover {
    background: var(--gradient);
    color: var(--white);
    border-color: var(--primary);
    transform: translateY(-2px);
}

/* Features Section */
.features {
    padding: 120px 0;
    background: var(--background);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--dark);
}

.section-subtitle {
    font-size: 18px;
    color: var(--gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--white);
    padding: 40px 32px;
    border-radius: 20px;
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 60px var(--shadow-lg);
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--white);
}

.feature-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--dark);
}

.feature-description {
    font-size: 15px;
    color: var(--gray);
    line-height: 1.7;
}

/* How to Use Section */
.how-to-use {
    padding: 120px 0;
    background: var(--white);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 48px;
    margin-top: 64px;
}

.step-card {
    position: relative;
    padding: 40px 32px;
    background: var(--background);
    border-radius: 20px;
    border: 2px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.step-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.step-number {
    font-size: 48px;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 24px;
}

.step-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--dark);
}

.step-description {
    font-size: 15px;
    color: var(--gray);
    line-height: 1.7;
}

/* FAQ Section */
.faq {
    padding: 120px 0;
    background: var(--background);
}

.faq-grid {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: 16px;
    margin-bottom: 16px;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.faq-question {
    width: 100%;
    padding: 24px 32px;
    background: none;
    border: none;
    text-align: left;
    font-family: 'Outfit', sans-serif;
    font-size: 18px;
    font-weight: 600;
    color: var(--dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    transition: all 0.3s ease;
}

.faq-question:hover {
    color: var(--primary);
}

.faq-icon {
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 32px 24px;
    color: var(--gray);
    line-height: 1.7;
}

/* Footer */
.footer {
    background: var(--dark);
    color: var(--gray-light);
    padding: 80px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 8px;
}

.footer-logo svg {
    color: var(--primary);
}

.footer-description {
    font-size: 14px;
    line-height: 1.7;
}

.footer-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--gray-light);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 32px;
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    margin-bottom: 8px;
}

.footer-disclaimer {
    color: var(--gray);
    font-size: 12px;
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 32px 20px;
        gap: 24px;
        box-shadow: 0 10px 40px var(--shadow);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: all 0.3s ease;
    }

    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .language-selector {
        width: 100%;
    }

    .lang-button {
        width: 100%;
        justify-content: center;
    }

    .lang-dropdown {
        width: 100%;
        left: 0;
        right: 0;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .download-box {
        flex-direction: column;
        padding: 16px;
    }

    .download-btn {
        width: 100%;
        justify-content: center;
    }

    .section-title {
        font-size: 36px;
    }

    .section-subtitle {
        font-size: 16px;
    }

    .features-grid,
    .steps-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }

    .section-title {
        font-size: 28px;
    }

    .feature-card,
    .step-card {
        padding: 32px 24px;
    }

    .faq-question {
        padding: 20px 24px;
        font-size: 16px;
    }

    .faq-answer p {
        padding: 0 24px 20px;
    }
}