/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --red: #e63946;
    --dark-red: #b5212d;
    --red-glow: rgba(230, 57, 70, 0.4);
    --bg-dark: #0a0a0a;
    --bg-card: #111111;
    --bg-card-hover: #1a1a1a;
    --text: #f1f1f1;
    --text-muted: #888888;
    --border: #222222;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(-45deg, #0a0a0a, #1a0000, #0a0a0a, #2a0a0a, #0a0a0a, #1a0005);
    background-size: 400% 400%;
    animation: gradientShift 12s ease infinite;
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

@keyframes gradientShift {
    0%   { background-position: 0% 50%; }
    25%  { background-position: 100% 50%; }
    50%  { background-position: 100% 100%; }
    75%  { background-position: 0% 100%; }
    100% { background-position: 0% 50%; }
}

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

ul {
    list-style: none;
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 4rem;
    transition: background 0.3s, box-shadow 0.3s;
}

.navbar.scrolled {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
}

.nav-brand {
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 3px;
    color: var(--red);
    text-shadow: 0 0 10px var(--red-glow);
}

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

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: color 0.3s;
    letter-spacing: 0.5px;
}

.nav-links a:hover {
    color: var(--red);
}

/* ===== Language Switcher ===== */
.lang-switcher {
    position: relative;
}

.lang-select {
    appearance: none;
    -webkit-appearance: none;
    background: var(--bg-card);
    color: var(--text);
    border: 1px solid var(--border);
    padding: 0.45rem 2.2rem 0.45rem 0.8rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    outline: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23888' viewBox='0 0 16 16'%3E%3Cpath d='M1.5 5.5l6.5 6.5 6.5-6.5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.6rem center;
}

.lang-select:hover {
    border-color: var(--red);
}

.lang-select:focus {
    border-color: var(--red);
    box-shadow: 0 0 8px var(--red-glow);
}

.lang-select option {
    background: var(--bg-card);
    color: var(--text);
    padding: 0.5rem;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--red);
    color: #fff;
    box-shadow: 0 4px 20px var(--red-glow);
}

.btn-primary:hover {
    background: var(--dark-red);
    box-shadow: 0 6px 30px var(--red-glow);
    transform: translateY(-2px);
}

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

.btn-outline:hover {
    background: var(--red);
    color: #fff;
}

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 700px;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1.2rem;
}

.hero p {
    font-size: 1.15rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
}

.highlight {
    color: var(--red);
}

.hero-glow {
    position: absolute;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--red-glow) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    opacity: 0.3;
    animation: pulse 4s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.2; transform: translate(-50%, -50%) scale(1); }
    50% { opacity: 0.4; transform: translate(-50%, -50%) scale(1.15); }
}

/* ===== Section Shared ===== */
.section-title {
    text-align: center;
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 3rem;
}

/* ===== Products ===== */
.products {
    padding: 6rem 2rem;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1100px;
    margin: 0 auto;
}

.product-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 2.5rem 2rem;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
    border-color: #333;
}

.product-card.featured {
    border-color: var(--red);
    box-shadow: 0 0 30px var(--red-glow);
}

.product-card.featured:hover {
    box-shadow: 0 0 50px var(--red-glow);
}

.card-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--red);
    color: #fff;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.product-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
}

.card-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.2rem;
}

.card-price {
    font-size: 2rem;
    font-weight: 800;
    color: var(--red);
    margin-bottom: 1.2rem;
}

.card-features {
    text-align: left;
    margin-bottom: 1.8rem;
    padding: 0 1rem;
}

.card-features li {
    padding: 0.35rem 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.product-card .btn {
    width: 100%;
    text-align: center;
}

/* ===== Features ===== */
.features {
    padding: 6rem 2rem;
    background: linear-gradient(180deg, var(--bg-dark) 0%, #0f0f0f 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
}

.feature-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: border-color 0.3s, transform 0.3s;
}

.feature-item:hover {
    border-color: var(--red);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 2.2rem;
    margin-bottom: 1rem;
}

.feature-item h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.feature-item p {
    color: var(--text-muted);
    font-size: 0.88rem;
}

/* ===== FAQ ===== */
.faq {
    padding: 6rem 2rem;
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: 10px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: border-color 0.3s;
}

.faq-item:hover {
    border-color: #333;
}

.faq-item.active {
    border-color: var(--red);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 1.5rem;
    cursor: pointer;
    font-weight: 600;
    font-size: 0.95rem;
    background: var(--bg-card);
    transition: background 0.3s;
}

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

.faq-toggle {
    font-size: 1.3rem;
    color: var(--red);
    transition: transform 0.3s;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 1.5rem 1.2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===== Footer ===== */
.footer {
    border-top: 1px solid var(--border);
    padding: 3rem 2rem;
    text-align: center;
}

.footer-brand {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--red);
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
}

.footer p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 1.2rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem 1.5rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .nav-links a {
        font-size: 0.85rem;
    }

    .hero h1 {
        font-size: 2.2rem;
    }

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

    .product-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

    .section-title {
        font-size: 1.7rem;
    }
}

@media (max-width: 480px) {
    .nav-links {
        display: none;
    }

    .hero h1 {
        font-size: 1.8rem;
    }
}