/* ============================
   ARUTECHNOLOGY — Main Styles
   ============================ */

/* --- CSS Variables --- */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-card: #16161f;
    --bg-card-hover: #1c1c28;
    --text-primary: #f0f0f5;
    --text-secondary: #8888a0;
    --text-muted: #55556a;
    --accent: #6c5ce7;
    --accent-light: #a29bfe;
    --accent-glow: rgba(108, 92, 231, 0.3);
    --gradient-1: linear-gradient(135deg, #6c5ce7, #a29bfe);
    --gradient-2: linear-gradient(135deg, #6c5ce7, #fd79a8);
    --gradient-3: linear-gradient(135deg, #00cec9, #6c5ce7);
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 6px;
    --shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px var(--accent-glow);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* --- Reset --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button, input, textarea, select { font-family: inherit; font-size: inherit; }

/* --- Preloader --- */
#preloader {
    position: fixed; inset: 0; z-index: 10000;
    background: var(--bg-primary);
    display: flex; align-items: center; justify-content: center;
    transition: opacity 0.6s, visibility 0.6s;
}
#preloader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.preloader-inner { text-align: center; }
.preloader-logo {
    font-size: 3rem; font-weight: 900; letter-spacing: -2px; margin-bottom: 2rem;
}
.preloader-logo span { color: var(--accent); }
.preloader-bar {
    width: 200px; height: 3px; background: var(--bg-card); border-radius: 10px; overflow: hidden;
}
.preloader-progress {
    height: 100%; width: 0; background: var(--gradient-1); border-radius: 10px;
    animation: preloaderFill 1.5s ease-out forwards;
}
@keyframes preloaderFill { to { width: 100%; } }

/* --- Container --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* --- Navbar --- */
#navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
}
#navbar.scrolled {
    padding: 12px 0;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}
.nav-container {
    max-width: 1200px; margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between;
}
.nav-logo {
    font-size: 1.4rem; font-weight: 800; letter-spacing: -1px;
    display: flex; align-items: center; gap: 4px;
}
.logo-icon { font-size: 1.6rem; }
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; gap: 32px; }
.nav-links a {
    font-size: 0.9rem; font-weight: 500; color: var(--text-secondary);
    transition: var(--transition); position: relative;
}
.nav-links a::after {
    content: ''; position: absolute; bottom: -4px; left: 0;
    width: 0; height: 2px; background: var(--gradient-1);
    transition: var(--transition);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
    padding: 10px 24px; background: var(--gradient-1); color: #fff;
    border-radius: var(--radius-xs); font-weight: 600; font-size: 0.85rem;
    transition: var(--transition);
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); }

/* Burger */
.burger { display: none; flex-direction: column; gap: 5px; cursor: pointer; z-index: 1001; }
.burger span {
    width: 24px; height: 2px; background: var(--text-primary);
    transition: var(--transition); border-radius: 2px;
}
.burger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.burger.active span:nth-child(2) { opacity: 0; }
.burger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* --- Hero --- */
#hero {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden; padding: 120px 24px 80px;
}
#particleCanvas {
    position: absolute; inset: 0; z-index: 0;
}
.hero-content {
    text-align: center; position: relative; z-index: 1; max-width: 900px;
}
.hero-badge {
    display: inline-block; padding: 8px 20px; background: rgba(108, 92, 231, 0.15);
    border: 1px solid rgba(108, 92, 231, 0.3); border-radius: 50px;
    font-size: 0.85rem; font-weight: 600; color: var(--accent-light);
    margin-bottom: 24px;
}
.hero-content h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 900;
    line-height: 1.1; letter-spacing: -2px; margin-bottom: 24px;
}
.gradient-text {
    background: var(--gradient-2); -webkit-background-clip: text;
    -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-sub {
    font-size: 1.15rem; color: var(--text-secondary); margin-bottom: 40px;
    letter-spacing: 2px;
}
.hero-buttons {
    display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 60px;
}

/* Buttons */
.btn {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 16px 32px; border-radius: var(--radius-sm);
    font-weight: 600; font-size: 1rem; cursor: pointer;
    transition: var(--transition); border: none; outline: none;
}
.btn-primary {
    background: var(--gradient-1); color: #fff;
}
.btn-primary:hover {
    transform: translateY(-3px); box-shadow: var(--shadow-glow);
}
.btn-outline {
    background: transparent; color: var(--text-primary);
    border: 1px solid var(--border-hover);
}
.btn-outline:hover {
    background: rgba(255,255,255,0.05); border-color: var(--accent);
}
.btn-full { width: 100%; justify-content: center; }

/* Hero Stats */
.hero-stats {
    display: flex; gap: 48px; justify-content: center; flex-wrap: wrap;
}
.stat { text-align: center; }
.stat-number {
    font-size: 2.5rem; font-weight: 900; color: var(--accent-light);
    display: inline;
}
.stat-label {
    display: block; font-size: 0.85rem; color: var(--text-muted); margin-top: 4px;
}

/* Scroll indicator */
.hero-scroll {
    position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); z-index: 1;
}
.hero-scroll a { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.hero-scroll span { font-size: 0.75rem; color: var(--text-muted); letter-spacing: 2px; }
.mouse {
    width: 24px; height: 38px; border: 2px solid var(--text-muted); border-radius: 12px;
    display: flex; justify-content: center; padding-top: 8px;
}
.wheel {
    width: 3px; height: 8px; background: var(--accent); border-radius: 3px;
    animation: scrollWheel 1.5s ease-in-out infinite;
}
@keyframes scrollWheel {
    0%, 100% { opacity: 1; transform: translateY(0); }
    50% { opacity: 0.3; transform: translateY(8px); }
}

/* --- Section Headers --- */
section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
    display: inline-block; padding: 6px 16px; background: rgba(108, 92, 231, 0.12);
    border: 1px solid rgba(108, 92, 231, 0.25); border-radius: 50px;
    font-size: 0.8rem; font-weight: 600; color: var(--accent-light);
    margin-bottom: 16px; letter-spacing: 1px; text-transform: uppercase;
}
.section-header h2 {
    font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; letter-spacing: -1px; margin-bottom: 16px;
}
.section-header p { color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

/* --- Services --- */
#services { background: var(--bg-secondary); }
.services-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}
.service-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 36px 28px;
    transition: var(--transition); position: relative; overflow: hidden;
}
.service-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: var(--gradient-1); opacity: 0; transition: var(--transition);
}
.service-card:hover {
    border-color: var(--accent); transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(108, 92, 231, 0.15);
}
.service-card:hover::before { opacity: 1; }
.service-icon {
    width: 56px; height: 56px; background: rgba(108, 92, 231, 0.1);
    border-radius: var(--radius-sm); display: flex; align-items: center;
    justify-content: center; margin-bottom: 20px;
    color: var(--accent-light);
}
.service-icon svg { width: 32px; height: 32px; }
.service-card h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 12px; }
.service-card > p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.7; margin-bottom: 20px; }
.service-features { display: flex; flex-direction: column; gap: 8px; }
.service-features li {
    padding-left: 20px; position: relative; font-size: 0.88rem; color: var(--text-secondary);
}
.service-features li::before {
    content: ''; position: absolute; left: 0; top: 8px;
    width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
}

/* --- About --- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about-text { color: var(--text-secondary); margin-bottom: 16px; line-height: 1.8; }
.about-features { display: flex; flex-direction: column; gap: 20px; margin-top: 32px; }
.about-feature { display: flex; gap: 16px; align-items: flex-start; }
.feature-icon {
    width: 32px; height: 32px; min-width: 32px; background: rgba(108, 92, 231, 0.15);
    border-radius: 8px; display: flex; align-items: center; justify-content: center;
    color: var(--accent-light); font-size: 0.85rem; font-weight: 700;
}
.about-feature h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 2px; }
.about-feature p { font-size: 0.85rem; color: var(--text-secondary); }

/* About Card / Code Block */
.about-card {
    background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 28px; position: relative;
}
.about-card::before {
    content: ''; position: absolute; inset: -1px; border-radius: var(--radius);
    background: var(--gradient-1); z-index: -1; opacity: 0.3; filter: blur(40px);
}
.tech-stack { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.tech-tag {
    padding: 6px 14px; background: rgba(108, 92, 231, 0.1);
    border: 1px solid rgba(108, 92, 231, 0.2); border-radius: 50px;
    font-size: 0.78rem; font-weight: 500; color: var(--accent-light);
}
.code-block {
    background: #0d0d14; border-radius: var(--radius-sm); overflow: hidden;
}
.code-header {
    padding: 12px 16px; background: rgba(255,255,255,0.03);
    display: flex; align-items: center; gap: 8px;
    border-bottom: 1px solid var(--border);
}
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.red { background: #ff5f57; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #28ca42; }
.code-filename { font-size: 0.75rem; color: var(--text-muted); margin-left: 8px; }
.code-block pre { padding: 16px 20px; overflow-x: auto; }
.code-block code { font-size: 0.82rem; line-height: 1.8; font-family: 'Fira Code', monospace; }
.code-keyword { color: #c678dd; }
.code-var { color: #e06c75; }
.code-prop { color: #61afef; }
.code-str { color: #98c379; }
.code-num { color: #d19a66; }

/* --- Portfolio --- */
#portfolio { background: var(--bg-secondary); }
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.portfolio-item {
    min-height: 260px; border-radius: var(--radius); overflow: hidden;
    position: relative; cursor: pointer;
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    transition: var(--transition);
}
.portfolio-item.large { grid-column: span 2; min-height: 320px; }
.portfolio-item:hover { transform: translateY(-6px); box-shadow: 0 20px 50px rgba(0,0,0,0.3); }
.portfolio-overlay {
    position: absolute; inset: 0; padding: 28px;
    background: linear-gradient(to top, rgba(10,10,15,0.95), transparent);
    display: flex; flex-direction: column; justify-content: flex-end;
    transition: var(--transition);
}
.portfolio-item:hover .portfolio-overlay {
    background: linear-gradient(to top, rgba(10,10,15,0.98), rgba(108,92,231,0.15));
}
.portfolio-tag {
    display: inline-block; padding: 4px 12px; background: rgba(108,92,231,0.25);
    border-radius: 50px; font-size: 0.75rem; font-weight: 600;
    color: var(--accent-light); margin-bottom: 8px; width: fit-content;
}
.portfolio-overlay h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 6px; }
.portfolio-overlay p { font-size: 0.85rem; color: var(--text-secondary); }

/* Decorative gradient overlays for portfolio items */
.portfolio-item:nth-child(1) { background: linear-gradient(135deg, #1a1a3e, #2d1b69); }
.portfolio-item:nth-child(2) { background: linear-gradient(135deg, #0d2137, #1a3a5c); }
.portfolio-item:nth-child(3) { background: linear-gradient(135deg, #1a2e1a, #2d5a1b); }
.portfolio-item:nth-child(4) { background: linear-gradient(135deg, #2e1a1a, #5a1b2d); }
.portfolio-item:nth-child(5) { background: linear-gradient(135deg, #1a2e2e, #1b5a5a); }

/* --- Process --- */
.process-timeline { max-width: 700px; margin: 0 auto; position: relative; }
.process-timeline::before {
    content: ''; position: absolute; left: 40px; top: 0; bottom: 0;
    width: 2px; background: var(--border);
}
.process-step { display: flex; gap: 32px; margin-bottom: 48px; align-items: flex-start; }
.step-number {
    min-width: 80px; height: 48px; display: flex; align-items: center;
    justify-content: center; font-size: 1.1rem; font-weight: 800;
    color: var(--accent-light); background: rgba(108,92,231,0.1);
    border-radius: var(--radius-sm); border: 1px solid rgba(108,92,231,0.2);
}
.step-content h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 6px; }
.step-content p { color: var(--text-secondary); font-size: 0.9rem; }

/* --- Reviews --- */
#reviews { background: var(--bg-secondary); }
.reviews-slider { max-width: 600px; margin: 0 auto; position: relative; }
.review-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 36px; text-align: center;
    display: none;
}
.review-card.active { display: block; }
.review-stars { color: #f1c40f; font-size: 1.2rem; margin-bottom: 16px; letter-spacing: 4px; }
.review-text { font-size: 1rem; color: var(--text-secondary); line-height: 1.8; margin-bottom: 24px; font-style: italic; }
.review-author { display: flex; align-items: center; justify-content: center; gap: 12px; }
.author-avatar {
    width: 44px; height: 44px; background: var(--gradient-1); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.85rem; font-weight: 700; color: #fff;
}
.review-author h4 { font-size: 0.9rem; font-weight: 600; }
.review-author span { font-size: 0.8rem; color: var(--text-muted); }
.review-dots { display: flex; justify-content: center; gap: 8px; margin-top: 24px; }
.review-dots .dot {
    width: 10px; height: 10px; border-radius: 50%;
    background: var(--text-muted); cursor: pointer; transition: var(--transition);
}
.review-dots .dot.active { background: var(--accent); width: 28px; border-radius: 5px; }

/* --- Contact --- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.contact-info h2 { font-size: clamp(1.8rem, 3vw, 2.5rem); font-weight: 800; letter-spacing: -1px; margin-bottom: 16px; }
.contact-info > p { color: var(--text-secondary); margin-bottom: 32px; }
.contact-details { display: flex; flex-direction: column; gap: 20px; margin-bottom: 32px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-icon {
    width: 48px; height: 48px; min-width: 48px; background: rgba(108,92,231,0.1);
    border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center;
}
.contact-icon svg { width: 22px; height: 22px; color: var(--accent-light); }
.contact-item h4 { font-size: 0.95rem; font-weight: 600; }
.contact-item p { font-size: 0.85rem; color: var(--text-secondary); }
.social-links { display: flex; gap: 12px; }
.social-link {
    width: 44px; height: 44px; background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-sm); display: flex; align-items: center; justify-content: center;
    transition: var(--transition); color: var(--text-secondary);
}
.social-link svg { width: 20px; height: 20px; }
.social-link:hover { background: var(--accent); color: #fff; border-color: var(--accent); }

/* Contact Form */
.contact-form-wrapper {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 36px; position: relative;
}
.contact-form h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 24px; }
.form-group {
    position: relative; margin-bottom: 20px;
}
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%; padding: 14px 16px; background: rgba(255,255,255,0.03);
    border: 1px solid var(--border); border-radius: var(--radius-xs);
    color: var(--text-primary); outline: none; transition: var(--transition);
}
.form-group select { cursor: pointer; }
.form-group select option { background: var(--bg-card); color: var(--text-primary); }
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-group label {
    position: absolute; left: 16px; top: 14px; color: var(--text-muted);
    font-size: 0.9rem; pointer-events: none; transition: var(--transition);
}
.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: -8px; left: 12px; font-size: 0.75rem; color: var(--accent-light);
    background: var(--bg-card); padding: 0 6px;
}
.form-hint {
    display: block; font-size: 0.72rem; color: var(--text-muted);
    margin-top: 6px; padding-left: 4px; transition: var(--transition);
}

/* Form Success */
.form-success {
    text-align: center; padding: 40px 20px;
}
.success-icon {
    width: 64px; height: 64px; background: rgba(40, 202, 66, 0.15);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 2rem; color: #28ca42; margin: 0 auto 20px;
    animation: successPop 0.5s ease-out;
}
@keyframes successPop {
    0% { transform: scale(0); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}
.form-success h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 8px; }
.form-success p { color: var(--text-secondary); }

/* --- Footer --- */
footer {
    background: var(--bg-secondary); border-top: 1px solid var(--border);
    padding: 60px 0 30px;
}
.footer-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
    margin-bottom: 40px;
}
.footer-brand p { color: var(--text-secondary); margin-top: 12px; font-size: 0.9rem; }
.footer-links h4 { font-size: 0.9rem; font-weight: 700; margin-bottom: 16px; }
.footer-links a {
    display: block; font-size: 0.85rem; color: var(--text-secondary);
    margin-bottom: 8px; transition: var(--transition);
}
.footer-links a:hover { color: var(--accent-light); }
.footer-bottom {
    padding-top: 24px; border-top: 1px solid var(--border);
    text-align: center;
}
.footer-bottom p { font-size: 0.8rem; color: var(--text-muted); }

/* Scroll Top */
.scroll-top {
    position: fixed; bottom: 32px; right: 32px; width: 44px; height: 44px;
    background: var(--accent); color: #fff; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem; z-index: 999; opacity: 0; visibility: hidden;
    transition: var(--transition); box-shadow: var(--shadow-glow);
}
.scroll-top.visible { opacity: 1; visibility: visible; }
.scroll-top:hover { transform: translateY(-4px); }

/* --- Animations --- */
[data-aos] {
    opacity: 0; transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
[data-aos="fade-right"] { transform: translateX(-30px); }
[data-aos="fade-left"] { transform: translateX(30px); }
[data-aos="fade-down"] { transform: translateY(-30px); }
[data-aos].aos-animate { opacity: 1; transform: translate(0, 0); }

/* --- Responsive --- */
@media (max-width: 1024px) {
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .contact-grid { grid-template-columns: 1fr; gap: 40px; }
    .portfolio-grid { grid-template-columns: 1fr 1fr; }
    .portfolio-item.large { grid-column: span 2; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    .nav-links, .nav-cta { display: none; }
    .burger { display: flex; }
    .nav-links.active {
        display: flex; flex-direction: column; position: fixed;
        top: 0; left: 0; right: 0; bottom: 0; background: var(--bg-primary);
        align-items: center; justify-content: center; gap: 32px;
        z-index: 1000;
    }
    .nav-links.active a { font-size: 1.3rem; }
    .hero-content h1 { font-size: 2.2rem; }
    .hero-stats { gap: 24px; }
    .stat-number { font-size: 2rem; }
    .services-grid { grid-template-columns: 1fr; }
    .portfolio-grid { grid-template-columns: 1fr; }
    .portfolio-item.large { grid-column: span 1; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    section { padding: 60px 0; }
    .process-step { gap: 16px; }
    .process-timeline::before { left: 20px; }
}
@media (max-width: 480px) {
    .hero-buttons { flex-direction: column; align-items: center; }
    .hero-stats { flex-direction: column; gap: 16px; }
    .btn { padding: 14px 24px; }
}