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

:root {
    --primary: #e94560;
    --primary-dark: #d63850;
    --secondary: #0f3460;
    --accent: #533483;
    --bg: #f0f2f5;
    --bg-card: rgba(255, 255, 255, 0.85);
    --text: #1a1a2e;
    --text-light: #555;
    --header-bg: rgba(26, 26, 46, 0.98);
    --shadow: 0 8px 32px rgba(0,0,0,0.1);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s ease;
    --glass-bg: rgba(255, 255, 255, 0.2);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px rgba(0,0,0,0.15);
}

body.dark-mode {
    --bg: #0a0a1a;
    --bg-card: rgba(30, 30, 58, 0.9);
    --text: #e0e0e0;
    --text-light: #aaa;
    --header-bg: rgba(10, 10, 26, 0.98);
    --shadow: 0 8px 32px rgba(0,0,0,0.4);
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    transition: background var(--transition), color var(--transition);
    -webkit-font-smoothing: antialiased;
}

/* ===== Typography ===== */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2rem, 5vw, 3.2rem);
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: clamp(1.5rem, 3.5vw, 2.4rem);
    margin-bottom: 1.5rem;
    position: relative;
    display: inline-block;
    padding-bottom: 0.5rem;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 2px;
}

h3 {
    font-size: 1.25rem;
    margin-bottom: 0.6rem;
}

p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

/* ===== Container ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ===== Header & Navigation ===== */
header {
    background: var(--header-bg);
    color: #fff;
    padding: 0.8rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.05);
    transition: background var(--transition), box-shadow var(--transition);
}

header.sticky {
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: #fff;
    text-decoration: none;
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: 0.5px;
}

.logo svg {
    transition: transform var(--transition);
}

.logo:hover svg {
    transform: rotate(-10deg) scale(1.05);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

.nav-links a {
    color: rgba(255,255,255,0.7);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background: var(--primary);
    transform: scaleX(0);
    transition: transform var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: #fff;
    background: rgba(233, 69, 96, 0.15);
}

.nav-links a.active::after {
    transform: scaleX(1);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.4rem;
    z-index: 100;
}

.mobile-menu-toggle span {
    display: block;
    width: 26px;
    height: 2.5px;
    background: #fff;
    margin: 5px 0;
    border-radius: 2px;
    transition: all var(--transition);
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.dark-mode-toggle {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    color: #fff;
    padding: 0.4rem 0.8rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all var(--transition);
    backdrop-filter: blur(4px);
}

.dark-mode-toggle:hover {
    background: rgba(255,255,255,0.2);
    transform: scale(1.05);
}

/* ===== Hero Section ===== */
#hero {
    position: relative;
    padding: 5rem 0 4rem;
    overflow: hidden;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #fff;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

body.dark-mode #hero {
    background: linear-gradient(135deg, #0a0a1a 0%, #0f1a2e 50%, #0a2040 100%);
}

#hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 50%, rgba(233, 69, 96, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(83, 52, 131, 0.1) 0%, transparent 50%);
    animation: heroGlow 10s ease-in-out infinite alternate;
}

@keyframes heroGlow {
    0% { transform: translate(0, 0) rotate(0deg); }
    100% { transform: translate(-5%, -5%) rotate(5deg); }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 600px;
    animation: fadeInUp 0.8s ease;
}

.hero-content p {
    color: rgba(255,255,255,0.8);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.hero-visual {
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-visual svg {
    filter: drop-shadow(0 20px 40px rgba(0,0,0,0.3));
    transition: transform var(--transition);
}

.hero-visual:hover svg {
    transform: translateY(-10px) scale(1.02);
}

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

/* ===== Buttons ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    padding: 0.9rem 2.5rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.05rem;
    text-decoration: none;
    transition: all var(--transition);
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.4);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(233, 69, 96, 0.5);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--secondary), var(--accent));
    color: #fff;
    padding: 0.7rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition);
    box-shadow: 0 4px 15px rgba(15, 52, 96, 0.3);
}

.btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(15, 52, 96, 0.4);
    color: #fff;
}

/* ===== Sections ===== */
section {
    padding: 5rem 0;
    position: relative;
}

section:nth-child(even) {
    background: rgba(233, 69, 96, 0.03);
}

body.dark-mode section:nth-child(even) {
    background: rgba(233, 69, 96, 0.05);
}

/* ===== About Grid ===== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.about-grid article {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    transition: all var(--transition);
}

.about-grid article:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0,0,0,0.15);
}

/* ===== Products Grid ===== */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.card:hover::before {
    transform: scaleX(1);
}

.card:hover {
    transform: translateY(-8px) scale(1.01);
    box-shadow: 0 16px 48px rgba(0,0,0,0.15);
}

.card ul {
    list-style: none;
    margin: 1rem 0;
}

.card ul li {
    padding: 0.3rem 0;
    color: var(--text-light);
    font-size: 0.95rem;
}

.card ul li::before {
    content: '•';
    color: var(--primary);
    margin-right: 0.5rem;
    font-weight: bold;
}

/* ===== Services Grid ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
}

.services-grid article {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    transition: all var(--transition);
    text-align: center;
}

.services-grid article:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0,0,0,0.15);
    border-color: var(--primary);
}

/* ===== Features Grid ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
}

.features-grid article {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    transition: all var(--transition);
    text-align: center;
}

.features-grid article:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 16px 48px rgba(0,0,0,0.15);
}

.features-grid svg {
    margin-bottom: 1rem;
    transition: transform var(--transition);
}

.features-grid article:hover svg {
    transform: scale(1.2) rotate(5deg);
}

/* ===== Howto Steps ===== */
.howto-steps {
    list-style: none;
    counter-reset: step;
    display: grid;
    gap: 1.5rem;
}

.howto-steps li {
    counter-increment: step;
    background: var(--bg-card);
    padding: 1.5rem 2rem 1.5rem 4rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    position: relative;
    transition: all var(--transition);
}

.howto-steps li::before {
    content: counter(step);
    position: absolute;
    left: 1.2rem;
    top: 1.5rem;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.95rem;
}

.howto-steps li:hover {
    transform: translateX(8px);
    box-shadow: 0 12px 36px rgba(0,0,0,0.12);
}

/* ===== FAQ ===== */
.faq-list {
    display: grid;
    gap: 0.8rem;
}

.faq-list details {
    background: var(--bg-card);
    border-radius: var(--radius-sm);
    padding: 0;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    transition: all var(--transition);
}

.faq-list details:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
}

.faq-list details[open] {
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.faq-list summary {
    padding: 1.2rem 1.5rem;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background var(--transition);
}

.faq-list summary::after {
    content: '+';
    font-size: 1.3rem;
    font-weight: 300;
    color: var(--primary);
    transition: transform var(--transition);
}

.faq-list details[open] summary::after {
    transform: rotate(45deg);
}

.faq-list summary:hover {
    background: rgba(233, 69, 96, 0.05);
}

.faq-list details p {
    padding: 0 1.5rem 1.2rem;
    margin: 0;
    color: var(--text-light);
}

/* ===== Knowledge Hub ===== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.articles-grid article {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.articles-grid article:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 48px rgba(0,0,0,0.15);
}

.articles-grid a {
    margin-top: auto;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.articles-grid a::after {
    content: '→';
    transition: transform var(--transition);
}

.articles-grid a:hover::after {
    transform: translateX(4px);
}

/* ===== Contact ===== */
.contact-info {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.1);
    max-width: 600px;
    margin: 0 auto;
}

.contact-info p {
    padding: 0.5rem 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.contact-info p:last-child {
    border-bottom: none;
}

.contact-info strong {
    color: var(--primary);
}

/* ===== Footer ===== */
footer {
    background: var(--header-bg);
    color: rgba(255,255,255,0.7);
    padding: 3rem 0 2rem;
    text-align: center;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.footer-links a {
    color: rgba(255,255,255,0.6);
    font-size: 0.95rem;
    transition: color var(--transition);
    position: relative;
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--primary);
    transform: scaleX(0);
    transition: transform var(--transition);
}

.footer-links a:hover {
    color: #fff;
}

.footer-links a:hover::after {
    transform: scaleX(1);
}

footer p {
    color: rgba(255,255,255,0.4);
    font-size: 0.9rem;
    margin: 0;
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    font-size: 1.5rem;
    cursor: pointer;
    display: none;
    z-index: 999;
    box-shadow: 0 4px 16px rgba(233, 69, 96, 0.4);
    transition: all var(--transition);
    opacity: 0;
    transform: translateY(20px);
}

.back-to-top.visible {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(233, 69, 96, 0.5);
}

/* ===== Scroll Animations ===== */
@media (prefers-reduced-motion: no-preference) {
    section {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity 0.6s ease, transform 0.6s ease;
    }

    section.visible {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    #hero {
        flex-direction: column;
        text-align: center;
        padding: 4rem 0;
    }

    .hero-content {
        max-width: 100%;
        margin-bottom: 2rem;
    }

    .hero-visual svg {
        width: 240px;
        height: 240px;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        background: var(--header-bg);
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        padding: 1rem;
        gap: 0.3rem;
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-bottom: 1px solid rgba(255,255,255,0.05);
    }

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

    .nav-links a {
        padding: 0.8rem 1rem;
        border-radius: 8px;
    }

    .mobile-menu-toggle {
        display: block;
    }

    h1 {
        font-size: 1.8rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .about-grid,
    .products-grid,
    .services-grid,
    .features-grid,
    .articles-grid {
        grid-template-columns: 1fr;
    }

    #hero {
        min-height: auto;
        padding: 3rem 0;
    }

    .hero-visual svg {
        width: 200px;
        height: 200px;
    }

    .back-to-top {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 44px;
        height: 44px;
        font-size: 1.2rem;
    }

    .footer-links {
        gap: 1rem;
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    section {
        padding: 3rem 0;
    }

    .btn-primary,
    .btn-secondary {
        padding: 0.7rem 1.5rem;
        font-size: 0.95rem;
    }

    .card,
    .about-grid article,
    .services-grid article,
    .features-grid article,
    .articles-grid article {
        padding: 1.2rem;
    }

    .howto-steps li {
        padding: 1rem 1rem 1rem 3.5rem;
    }

    .howto-steps li::before {
        left: 0.8rem;
        width: 28px;
        height: 28px;
        font-size: 0.85rem;
    }
}

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

a:focus-visible,
button:focus-visible,
details summary:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 3px;
    border-radius: 4px;
}

/* ===== Glass Effect Utility ===== */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
}

/* ===== Smooth Scrollbar ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary), var(--accent));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}