:root {
    --bg-color: #fcfcfd;
    --accent-color: #2563eb;
    --accent-glow: rgba(37, 99, 235, 0.15);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(15, 23, 42, 0.08);
    --glass-blur: 16px;
    --container-width: 1200px;
    --transition-slow: 0.8s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* --- Navigation --- */
header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: var(--transition-fast);
}

header.scrolled {
    padding: 1rem 0;
    background: rgba(252, 252, 253, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.03);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

#header-logo {
    height: 40px;
    width: auto;
    border-radius: 8px;
}

.company-name {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

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

.cta-nav {
    background: var(--accent-color);
    color: white !important;
    padding: 0.6rem 1.2rem;
    border-radius: 100px;
    transition: transform var(--transition-fast) !important;
}

.cta-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px var(--accent-glow);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    cursor: pointer;
}

/* --- Hero Section --- */
.hero-section {
    padding: 12rem 0 8rem;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero-section h1 {
    font-size:clamp(3rem, 8vw, 5rem);
    line-height: 1.1;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -0.03em;
}

.gradient-text {
    background: linear-gradient(135deg, #3b82f6 0%, #a855f7 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-section p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

.primary-btn, .secondary-btn, .submit-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition-fast);
    cursor: pointer;
}

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

.primary-btn:hover {
    box-shadow: 0 15px 30px var(--accent-glow);
    transform: translateY(-3px);
}

.secondary-btn {
    background: white;
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.secondary-btn:hover {
    background: #f8fafc;
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

/* --- Hero Visuals --- */
.hero-visual {
    position: absolute;
    top: 50%;
    right: -10%;
    transform: translateY(-50%);
    width: 60%;
    height: 80%;
    z-index: 1;
    pointer-events: none;
}

.glow-sphere {
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    filter: blur(60px);
    animation: pulse 8s infinite alternate;
}

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.5; }
    100% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.8; }
}

/* --- Services --- */
.services-section {
    padding: 8rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
}

.subtitle {
    display: block;
    color: var(--accent-color);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.2rem;
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.section-header h2 {
    font-size: 3rem;
    font-weight: 800;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.glass-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(var(--glass-blur));
    border-radius: 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.04);
}

.service-card {
    padding: 3rem 2rem;
    text-align: left;
    transition: var(--transition-slow);
}

.service-card:hover {
    background: white;
    border-color: var(--accent-color);
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 60px rgba(37, 99, 235, 0.1);
}

.service-card .icon {
    width: 48px;
    height: 48px;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
    animation: floatIcon 4s ease-in-out infinite;
}

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

.service-card:nth-child(2) { transition-delay: 0.1s; }
.service-card:nth-child(3) { transition-delay: 0.2s; }
.service-card:nth-child(4) { transition-delay: 0.3s; }

/* --- Tech Stack Slider --- */
.tech-stack-section {
    padding: 4rem 0 8rem;
    background: linear-gradient(to bottom, transparent, rgba(59, 130, 246, 0.02));
}

.slider-container {
    width: 100%;
    overflow: hidden;
    padding: 4rem 0;
    position: relative;
}

.slider-container::before, .slider-container::after {
    content: "";
    position: absolute;
    top: 0;
    width: 200px;
    height: 100%;
    z-index: 2;
}

.slider-container::before {
    left: 0;
    background: linear-gradient(to right, var(--bg-color), transparent);
}

.slider-container::after {
    right: 0;
    background: linear-gradient(to left, var(--bg-color), transparent);
}

.tech-slider {
    display: flex;
    width: max-content;
    gap: 4rem;
    animation: marquee 30s linear infinite;
}

.tech-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
    transition: var(--transition-fast);
}

.tech-item i {
    width: 32px;
    height: 32px;
    color: var(--accent-color);
}

.tech-item:hover {
    color: var(--accent-color);
    transform: scale(1.1);
}

@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-secondary);
}

/* --- About Section --- */
.about-section {
    padding: 8rem 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-content h2 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.check-list {
    list-style: none;
    margin-top: 2rem;
}

.check-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.check-icon {
    color: var(--accent-color);
}

.about-visual {
    height: 400px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.stat-card {
    text-align: center;
    padding: 2rem;
}

.stat-card .number {
    display: block;
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--accent-color);
}

/* --- Contact Section --- */
.contact-section {
    padding: 8rem 0;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    padding: 4rem;
    gap: 4rem;
}

.contact-info h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.contact-details {
    margin-top: 3rem;
}

.detail-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 1rem 1.5rem;
    background: white;
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    background: #fdfdfd;
    box-shadow: 0 0 0 4px var(--accent-glow);
}

.form-group textarea {
    height: 150px;
    resize: none;
}

.submit-btn {
    border: none;
    background: var(--accent-color);
    color: white;
    justify-content: center;
}

/* --- Footer --- */
.footer {
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--glass-border);
}

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

.social-links {
    display: flex;
    gap: 1.5rem;
}

.social-links a {
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.social-links a:hover {
    color: var(--accent-color);
}

/* --- Animations --- */
[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}

[data-reveal="left"] {
    transform: translateX(-50px);
}

[data-reveal="right"] {
    transform: translateX(50px);
}

.check-list li {
    transition: var(--transition-slow);
    transition-delay: calc(var(--delay) * 0.1s);
}

.reveal-text {
    opacity: 0;
    transform: translateY(20px);
    animation: revealIn 1s forwards cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-subtext {
    opacity: 0;
    transform: translateY(20px);
    animation: revealIn 1s 0.2s forwards cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-btns {
    opacity: 0;
    transform: translateY(20px);
    animation: revealIn 1s 0.4s forwards cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes revealIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Responsive --- */
@media (max-width: 991px) {
    .about-grid, .contact-container {
        grid-template-columns: 1fr;
        padding: 2.5rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
}

@media (max-width: 768px) {
    .section-header h2, .about-content h2, .contact-info h2 {
        font-size: 2.25rem;
    }
}