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

:root {
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --secondary-color: #764ba2;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #ffffff;
    --bg-light: #f8f9fa;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
}

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

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

/* Header */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

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

.nav-menu a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}

.nav-menu a:hover {
    opacity: 0.8;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    gap: 4px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: white;
    border-radius: 2px;
    transition: all 0.3s;
}

/* Hero секция */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero-logo {
    margin-bottom: 2rem;
    animation: fadeInScale 1s ease-out;
}

.hero-logo-img {
    height: 200px;
    width: auto;
    max-width: 500px;
    object-fit: contain;
    filter: drop-shadow(0 4px 20px rgba(0, 0, 0, 0.3));
    animation: float 3s ease-in-out infinite;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Кнопки */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

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

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

.btn-secondary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-disabled {
    background: var(--border-color);
    color: var(--text-light);
    cursor: not-allowed;
}

/* Секции */
section {
    padding: 4rem 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-color);
}

.subsection-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

/* Features */
.features {
    background: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

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

.functionality {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.functionality-list {
    list-style: none;
    padding-left: 0;
}

.functionality-list li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-light);
}

.functionality-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* Setup */
.setup-section {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.setup-steps {
    list-style: none;
    counter-reset: step-counter;
    padding-left: 0;
}

.setup-steps li {
    counter-increment: step-counter;
    padding: 1rem 0;
    padding-left: 3rem;
    position: relative;
    color: var(--text-light);
}

.setup-steps li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 1rem;
    background: var(--primary-color);
    color: white;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.setup-steps code {
    background: var(--bg-light);
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    color: var(--primary-color);
}

/* Downloads */
.downloads {
    background: var(--bg-light);
}

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

.download-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.download-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.download-card h3 {
    margin-bottom: 1rem;
    color: var(--text-color);
}

.download-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

/* Yandex */
.yandex-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.step-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    position: relative;
}

.step-number {
    position: absolute;
    top: -1rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: white;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
}

.step-card h3 {
    margin-top: 1rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

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

.step-card a {
    color: var(--primary-color);
    text-decoration: none;
}

.step-card a:hover {
    text-decoration: underline;
}

.voice-commands {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.commands-list {
    list-style: none;
    padding-left: 0;
}

.commands-list li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-light);
}

.commands-list li::before {
    content: "🎤";
    position: absolute;
    left: 0;
}

.mqtt-note {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid var(--primary-color);
}

.mqtt-note p {
    color: var(--text-light);
    margin: 0;
}

/* FAQ */
.faq {
    background: var(--bg-light);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto 3rem;
}

.faq-item {
    background: white;
    margin-bottom: 1rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 1.5rem;
    background: none;
    border: none;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    color: var(--text-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.3s;
}

.faq-question:hover {
    background: var(--bg-light);
}

.faq-question::after {
    content: "+";
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform 0.3s;
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

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

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

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-light);
}

.support {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
}

.support-email {
    font-size: 1.2rem;
    margin-top: 1rem;
}

.support-email a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.support-email a:hover {
    text-decoration: underline;
}

/* Footer */
.footer {
    background: var(--text-color);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer a {
    color: white;
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* Адаптивность */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        background: var(--primary-color);
        flex-direction: column;
        padding: 2rem;
        transition: left 0.3s;
        box-shadow: var(--shadow);
    }

    .nav-menu.active {
        left: 0;
    }

    .menu-toggle {
        display: flex;
    }

    .hero-logo-img {
        height: 140px;
        max-width: 350px;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 2rem;
    }

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

    .container {
        padding: 0 15px;
    }
}

/* Плавная прокрутка */
html {
    scroll-behavior: smooth;
}

/* Анимации при появлении */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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