:root {
    --bg: #000000;
    --card: rgba(20, 20, 20, 0.85);
    --text: #FFFFFF;
    --text-secondary: rgba(255, 255, 255, 0.65);
    --accent: #FFFFFF;
    --accent-text: #000000;
    --border: rgba(255, 255, 255, 0.1);
    --radius-large: 36px;
    --radius-medium: 24px;
    --blur: 16px;
    --shadow: 0 2px 16px rgba(0, 0, 0, 0.3);
    --spacing-unit: 0.7rem; /* 8px grid */
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
    padding: calc(var(--spacing-unit) * 2); /* 16px */
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-unit); /* 8px */
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: calc(var(--spacing-unit) * 3); /* 24px */
}

.main-nav {
    display: flex;
    gap: calc(var(--spacing-unit) * 2); /* 16px */
}

.main-nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
}

.main-nav a:hover {
    color: var(--text);
}

.logo {
    font-size: 1.5rem; /* 24px */
    font-weight: 700;
    letter-spacing: -0.02em;
}

.cta {
    background: var(--accent);
    color: var(--accent-text);
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3); /* 12px 24px */
    border-radius: var(--radius-medium);
    font-weight: 600;
    font-size: 0.9rem; /* 14px */
    text-decoration: none;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
    min-height: 48px; /* Touch target */
    display: flex;
    align-items: center;
    justify-content: center;
}

.cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    opacity: 0.95;
}

.cta.large {
    font-size: 1.1rem;
    padding: calc(var(--spacing-unit) * 2) calc(var(--spacing-unit) * 4);
}

.cta.small {
    font-size: 0.85rem;
    padding: var(--spacing-unit) calc(var(--spacing-unit) * 2);
}

.auth-links {
    display: flex;
}

.auth-links .cta {
    margin: 0 0 0 16px;
}

.card {
    background: var(--card);
    backdrop-filter: blur(var(--blur));
    border-radius: var(--radius-large);
    padding: calc(var(--spacing-unit) * 3); /* 24px */
    border: 1px solid var(--border);
    margin-bottom: calc(var(--spacing-unit) * 3); /* 24px */
    transition: transform 0.2s ease;
}

.card:hover {
    transform: translateY(-3px);
}

.hero {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: calc(var(--spacing-unit) * 3);
}

.hero-content {
    flex: 1;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-large);
}

h1 {
    font-size: 2.5rem; /* 40px */
    font-weight: 700;
    margin-bottom: var(--spacing-unit); /* 8px */
    letter-spacing: -0.03em;
}

h2 {
    font-size: 1.5rem; /* 24px */
    font-weight: 600;
    margin-bottom: var(--spacing-unit); /* 8px */
    letter-spacing: -0.02em;
}

h3 {
    font-size: 1.25rem; /* 20px */
    font-weight: 600;
    margin-bottom: var(--spacing-unit); /* 8px */
}

p {
    color: var(--text-secondary);
    font-size: 0.9rem; /* 14px */
    margin-bottom: var(--spacing-unit); /* 8px */
}

.controls {
    display: flex;
    gap: var(--spacing-unit); /* 8px */
    margin: calc(var(--spacing-unit) * 2) 0; /* 16px */
    flex-wrap: wrap;
}

.upload-label {
    padding: calc(var(--spacing-unit) * 1.5) calc(var(--spacing-unit) * 3); /* 12px 24px */
    background: var(--card);
    border-radius: var(--radius-medium);
    cursor: pointer;
    color: var(--text);
    font-weight: 500;
    font-size: 0.9rem; /* 14px */
    border: 1px solid var(--border);
    transition: all 0.2s ease;
    min-height: 48px; /* Touch target */
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-label:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.file-upload {
    display: none;
}

#result {
    min-height: 120px;
    padding: calc(var(--spacing-unit) * 2); /* 16px */
    background: var(--card);
    border-radius: var(--radius-medium);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    white-space: pre-wrap;
    font-size: 0.9rem; /* 14px */
    transition: opacity 0.3s ease;
    position: relative;
}

#result.loading {
    opacity: 0.5;
}

#result.recording::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 32px;
    height: 32px;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%23FFFFFF' viewBox='0 0 24 24'%3E%3Cpath d='M12 14c1.66 0 3-1.34 3-3V5c0-1.66-1.34-3-3-3S9 3.34 9 5v6c0 1.66 1.34 3 3 3zm5.91-3c-.49 0-.9.36-.98.85C16.52 14.2 14.47 16 12 16s-4.52-1.8-4.93-4.15c-.08-.49-.49-.85-.98-.85-.61 0-1.09.54-1 1.14.49 3 2.97 5.42 5.91 6.28V21h2v-2.72c2.94-.86 5.42-3.28 5.91-6.28.09-.6-.39-1.14-1-1.14z'/%3E%3C/svg%3E") no-repeat center;
    background-size: 32px;
    animation: pulse 1.5s ease-in-out infinite;
}

#result.loading::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 40px;
    height: 40px;
    border: 4px solid var(--accent);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.dots::after {
    content: '';
    animation: dots 1.5s steps(3, end) infinite;
}

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(1); }
    50% { transform: translate(-50%, -50%) scale(1.15); }
    100% { transform: translate(-50%, -50%) scale(1); }
}

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

@keyframes dots {
    0% { content: '.'; }
    33% { content: '..'; }
    66% { content: '...'; }
}

.how-it-works, .features, .testimonials, .pricing, .advantages, .use-cases, .integrations, .faq, .blog-teaser, .cta-section {
    margin: calc(var(--spacing-unit) * 4) 0; /* 32px */
}

.steps-grid, .feature-grid, .testimonial-grid, .advantage-grid, .case-grid, .integrations-grid, .blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: calc(var(--spacing-unit) * 2); /* 16px */
}

.step-card, .feature-card, .testimonial-card, .advantage-block, .case-card, .integration-card, .blog-card {
    background: var(--card);
    backdrop-filter: blur(var(--blur));
    border-radius: var(--radius-large);
    padding: calc(var(--spacing-unit) * 2); /* 16px */
    border: 1px solid var(--border);
    transition: transform 0.2s ease;
}

.step-card:hover, .feature-card:hover, .testimonial-card:hover, .advantage-block:hover, .case-card:hover, .integration-card:hover, .blog-card:hover {
    transform: translateY(-3px);
}

.step-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    background: var(--accent-text);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-unit);
}

.feature-icon {
    font-size: 2rem; /* 32px */
    margin-bottom: var(--spacing-unit); /* 8px */
}

.user-photo {
    border-radius: 50%;
    margin-bottom: var(--spacing-unit);
}

.user-name {
    font-weight: 500;
    color: var(--text);
    margin-top: var(--spacing-unit);
    text-align: right;
}

.pricing-table {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-unit); /* 8px */
}

.price-card {
    background: var(--card);
    backdrop-filter: blur(var(--blur));
    border-radius: var(--radius-large);
    padding: calc(var(--spacing-unit) * 2); /* 16px */
    border: 1px solid var(--border);
    text-align: center;
    transition: transform 0.2s ease;
    position: relative;
}

.price-card:hover {
    transform: translateY(-3px);
}

.price-card.popular {
    border-color: var(--accent);
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.2);
}

.popular-badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: var(--accent-text);
    padding: 4px 12px;
    border-radius: var(--radius-medium);
    font-size: 0.8rem;
    font-weight: 600;
}

.price-title {
    font-size: 1.25rem; /* 20px */
    font-weight: 600;
    margin-bottom: var(--spacing-unit); /* 8px */
}

.price-value {
    font-size: 1.75rem; /* 28px */
    font-weight: 700;
    margin-bottom: calc(var(--spacing-unit) * 1.5); /* 12px */
}

.price-features {
    list-style: none;
    color: var(--text-secondary);
    font-size: 0.85rem; /* 13px */
    margin-bottom: var(--spacing-unit); /* 8px */
}

.price-features li {
    margin-bottom: calc(var(--spacing-unit) / 2); /* 4px */
}

.pricing-comparison {
    margin-top: calc(var(--spacing-unit) * 3);
    overflow-x: auto;
}

.pricing-comparison table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.pricing-comparison th, .pricing-comparison td {
    padding: calc(var(--spacing-unit) / 2) var(--spacing-unit);
    border: 1px solid var(--border);
    text-align: center;
}

.pricing-comparison th {
    background: var(--card);
    font-weight: 600;
}

.advantage-block img, .case-card img, .step-card img, .feature-card img, .integration-card img, .blog-card img {
    max-width: 100%;
    height: auto;
    margin-bottom: var(--spacing-unit);
    border-radius: var(--radius-medium);
}

.case-list {
    list-style: none;
    color: var(--text-secondary);
    font-size: 0.9rem; /* 14px */
}

.case-list li {
    margin-bottom: calc(var(--spacing-unit) / 2); /* 4px */
    position: relative;
    padding-left: calc(var(--spacing-unit) * 2); /* 16px */
}

.case-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--text);
}

.faq-accordion .faq-item {
    background: var(--card);
    border-radius: var(--radius-medium);
    padding: var(--spacing-unit);
    margin-bottom: var(--spacing-unit);
    cursor: pointer;
    transition: background 0.2s ease;
}

.faq-accordion .faq-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.faq-accordion .faq-item h3 {
    margin-bottom: 0;
}

.faq-accordion .faq-item p {
    display: none; /* Для аккордеона, добавить JS для toggle */
}

.blog-card {
    text-align: center;
}

.blog-card h3 {
    margin-top: var(--spacing-unit);
}

.cta-section {
    text-align: center;
    background: var(--card);
    border-radius: var(--radius-large);
    padding: calc(var(--spacing-unit) * 4);
    border: 1px solid var(--border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-unit);
}

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.footer-social {
    display: flex;
    gap: var(--spacing-unit);
}

.footer-social a img {
    transition: transform 0.2s ease;
}

.footer-social a:hover img {
    transform: scale(1.1);
}

footer p {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem; /* 13px */
}

@media (max-width: 768px) {
    .hero {
        flex-direction: column;
    }

    h1 {
        font-size: 2rem; /* 32px */
    }
    h2 {
        font-size: 1.25rem; /* 20px */
    }
    .controls {
        flex-direction: column;
        gap: calc(var(--spacing-unit) / 2); /* 4px */
    }
    .steps-grid, .feature-grid, .testimonial-grid, .advantage-grid, .case-grid, .integrations-grid, .blog-grid {
        grid-template-columns: 1fr;
    }
    .card {
        padding: calc(var(--spacing-unit) * 2); /* 16px */
    }
    #result {
        min-height: 100px;
    }
    header {
        flex-direction: column;
        gap: var(--spacing-unit);
    }
    .main-nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    .auth-links {
        justify-content: center;
    }
    .footer-content {
        flex-direction: column;
        gap: var(--spacing-unit);
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.75rem;
    }
    h2 {
        font-size: 1.1rem;
    }
    p, .case-list, .price-features {
        font-size: 0.85rem;
    }
    .logo {
        font-size: 1.25rem;
    }
    .cta, .upload-label {
        font-size: 0.85rem;
        padding: var(--spacing-unit) calc(var(--spacing-unit) * 2); /* 8px 16px */
    }
}


/* Модальное окно логина */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background: var(--card);
    border-radius: var(--radius-large);
    padding: calc(var(--spacing-unit) * 3);
    max-width: 400px;
    width: 90%;
    border: 1px solid var(--border);
    position: relative;
    animation: slideIn 0.3s ease;
}

.modal-content h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.modal-content form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-unit);
}

.modal-content input {
    padding: calc(var(--spacing-unit) * 1.5);
    border-radius: var(--radius-medium);
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.1);
    color: var(--text);
    font-size: 0.9rem;
}

.modal-content button {
    background: var(--accent);
    color: var(--accent-text);
    padding: calc(var(--spacing-unit) * 1.5);
    border-radius: var(--radius-medium);
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.modal-content button:hover {
    transform: translateY(-2px);
    opacity: 0.95;
}

.modal-content .error-message {
    color: #FF5555;
    font-size: 0.85rem;
    margin-top: calc(var(--spacing-unit) / 2);
    display: none;
}

.modal-content .close {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal-content .close:hover {
    color: var(--text);
}

.modal-content .register-link {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: calc(var(--spacing-unit) * 2);
}

.modal-content .register-link a {
    color: var(--text);
    text-decoration: none;
}

.modal-content .register-link a:hover {
    text-decoration: underline;
}

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

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