/* ============================================
   Sangeet Kumar - Freelance Web Developer
   Main Stylesheet
   ============================================ */

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #0ea5e9;
    --accent: #f59e0b;
    --success: #10b981;
    --danger: #ef4444;
    --font-primary: 'Inter', sans-serif;
    --font-heading: 'Space Grotesk', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
}

[data-theme="light"] {
    --bg-body: #ffffff;
    --bg-section: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --navbar-bg: rgba(255,255,255,0.95);
    --hero-overlay: rgba(15,23,42,0.85);
}

[data-theme="dark"] {
    --bg-body: #0f172a;
    --bg-section: #1e293b;
    --bg-card: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --navbar-bg: rgba(15,23,42,0.95);
    --hero-overlay: rgba(15,23,42,0.9);
}

*, *::before, *::after { box-sizing: border-box; }

body {
    font-family: var(--font-primary);
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    padding-top: 76px;
}

h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); font-weight: 700; }

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

/* Navbar */
.navbar {
    background: var(--navbar-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 0;
    transition: var(--transition);
}
.navbar.scrolled { box-shadow: var(--shadow); }
.navbar-brand .brand-text { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; color: var(--text-primary); }
.nav-link { color: var(--text-secondary) !important; font-weight: 500; padding: 0.5rem 1rem !important; position: relative; }
.nav-link:hover, .nav-link.active { color: var(--primary) !important; }
.navbar-toggler { border-color: var(--border-color); }
.navbar-toggler-icon { filter: var(--text-primary); }
[data-theme="dark"] .navbar-toggler-icon { filter: invert(1); }

.btn-theme-toggle {
    background: var(--bg-section);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition);
}
.btn-theme-toggle:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
    font-weight: 600;
    border-radius: 8px;
    padding: 0.625rem 1.5rem;
    transition: var(--transition);
}
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(99,102,241,0.4); }
.btn-outline-light { border-radius: 8px; font-weight: 600; }

/* Hero */
.hero-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%);
    background-size: cover;
    background-position: center;
    margin-top: -76px;
    padding-top: 76px;
}
.hero-overlay { position: absolute; inset: 0; background: var(--hero-overlay); }
.hero-content { position: relative; z-index: 2; }
.hero-badge {
    display: inline-block;
    background: rgba(99,102,241,0.2);
    color: var(--primary-light);
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(99,102,241,0.3);
}
.hero-title { font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 800; color: #fff; line-height: 1.1; margin-bottom: 1.5rem; }
.hero-subtitle { font-size: 1.125rem; color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto 2rem; }
.hero-scroll { position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%); z-index: 2; }
.hero-scroll a { color: rgba(255,255,255,0.6); font-size: 1.5rem; animation: bounce 2s infinite; }

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

/* Animations */
.animate-fade-up { opacity: 0; transform: translateY(30px); animation: fadeUp 0.8s forwards; }
.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }
@keyframes fadeUp { to { opacity: 1; transform: translateY(0); } }

/* Sections */
.section-padding { padding: 5rem 0; }
.bg-section { background: var(--bg-section); }
.section-badge {
    display: inline-block;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 0.75rem;
}
.section-title { font-size: clamp(1.75rem, 3vw, 2.5rem); margin-bottom: 1rem; color: var(--text-primary); }

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 4rem 0 3rem;
    margin-top: -76px;
    padding-top: calc(4rem + 76px);
    color: #fff;
    text-align: center;
}
.page-header h1 { color: #fff; margin-bottom: 0.5rem; }
.page-header .breadcrumb { justify-content: center; margin-bottom: 0; }
.page-header .breadcrumb-item a { color: rgba(255,255,255,0.8); }
.page-header .breadcrumb-item.active { color: rgba(255,255,255,0.6); }
.page-header .breadcrumb-item + .breadcrumb-item::before { color: rgba(255,255,255,0.5); }

/* Stats */
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 2rem;
    transition: var(--transition);
}
.stat-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
.stat-icon { font-size: 2rem; color: var(--primary); margin-bottom: 1rem; }
.stat-number { font-size: 2.5rem; font-weight: 800; color: var(--text-primary); display: inline; }
.stat-suffix { font-size: 1.5rem; font-weight: 700; color: var(--primary); }
.stat-label { color: var(--text-secondary); margin-top: 0.5rem; margin-bottom: 0; }

/* Feature Cards */
.feature-card, .service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 2rem;
    height: 100%;
    transition: var(--transition);
}
.feature-card:hover, .service-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
.feature-icon, .service-icon {
    width: 60px; height: 60px;
    background: rgba(99,102,241,0.1);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; color: var(--primary);
    margin-bottom: 1.25rem;
}
.service-number { font-size: 3rem; font-weight: 800; color: var(--border-color); line-height: 1; margin-bottom: -1rem; }
.service-desc { display: none; }

/* Portfolio */
.portfolio-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}
.portfolio-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.portfolio-image { position: relative; overflow: hidden; aspect-ratio: 16/10; }
.portfolio-image img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.portfolio-card:hover .portfolio-image img { transform: scale(1.05); }
.portfolio-overlay {
    position: absolute; inset: 0;
    background: rgba(99,102,241,0.85);
    display: flex; align-items: center; justify-content: center;
    opacity: 0; transition: var(--transition);
}
.portfolio-card:hover .portfolio-overlay { opacity: 1; }
.portfolio-info { padding: 1.25rem; }
.portfolio-category { font-size: 0.75rem; color: var(--primary); font-weight: 600; text-transform: uppercase; }
.portfolio-info h5 { margin: 0.5rem 0 0; }
.portfolio-info h5 a { color: var(--text-primary); }
.portfolio-filter { display: flex; flex-wrap: wrap; gap: 0.5rem; justify-content: center; }
.filter-btn {
    padding: 0.5rem 1.25rem;
    border-radius: 50px;
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    text-decoration: none;
}
.filter-btn:hover, .filter-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* Testimonials */
.testimonial-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 2rem;
    transition: var(--transition);
}
.testimonial-card:hover { box-shadow: var(--shadow-lg); }
.testimonial-rating { margin-bottom: 1rem; }
.testimonial-text { font-style: italic; color: var(--text-secondary); margin-bottom: 1.5rem; }
.testimonial-author { display: flex; align-items: center; gap: 1rem; }
.testimonial-author img, .author-avatar {
    width: 50px; height: 50px; border-radius: 50%; object-fit: cover;
}
.author-avatar {
    background: var(--primary); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 1.25rem;
}

/* Blog */
.blog-card { background: var(--bg-card); border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border-color); transition: var(--transition); height: 100%; }
.blog-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.blog-image { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
.blog-content { padding: 1.5rem; }
.blog-category { font-size: 0.75rem; color: var(--primary); font-weight: 600; text-transform: uppercase; }
.blog-content h5 a { color: var(--text-primary); }
.blog-meta { display: flex; gap: 1rem; color: var(--text-muted); font-size: 0.875rem; margin-top: 1rem; }
.blog-detail .blog-body { line-height: 1.8; }
.blog-detail .blog-body img { max-width: 100%; border-radius: var(--radius); }
.category-list { list-style: none; padding: 0; }
.category-list li a { display: block; padding: 0.75rem 1rem; border-radius: 8px; color: var(--text-secondary); transition: var(--transition); }
.category-list li a:hover, .category-list li a.active { background: var(--primary); color: #fff; }
.sidebar-widget { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 1.5rem; }

/* Contact */
.contact-form .form-control, .contact-form .form-select {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.875rem 1rem;
    border-radius: 8px;
}
.contact-form .form-control:focus, .contact-form .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.15);
    background: var(--bg-card);
    color: var(--text-primary);
}
.contact-info-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 2rem; height: 100%; }
.contact-item { display: flex; gap: 1rem; margin-bottom: 1.5rem; }
.contact-item i { font-size: 1.5rem; color: var(--primary); width: 40px; }
.map-section iframe { display: block; filter: grayscale(30%); }

/* About */
.about-placeholder { background: var(--bg-section); height: 400px; display: flex; align-items: center; justify-content: center; font-size: 5rem; color: var(--text-muted); }
.experience-badge { display: inline-flex; align-items: center; gap: 1rem; background: var(--primary); color: #fff; padding: 1rem 2rem; border-radius: var(--radius); }
.exp-number { font-size: 2.5rem; font-weight: 800; }
.progress { height: 8px; background: var(--bg-section); border-radius: 4px; }
.progress-bar { background: var(--primary); border-radius: 4px; transition: width 1.5s ease; }

/* Timeline */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--border-color); }
.timeline-item { position: relative; margin-bottom: 2rem; padding-left: 2rem; }
.timeline-marker { position: absolute; left: -2rem; top: 0.5rem; width: 14px; height: 14px; background: var(--primary); border-radius: 50%; border: 3px solid var(--bg-body); transform: translateX(-6px); }
.timeline-content { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 1.5rem; }
.timeline-date { color: var(--primary); font-weight: 600; font-size: 0.875rem; }

.mission-card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 2rem; height: 100%; }
.mission-icon { font-size: 2rem; color: var(--primary); margin-bottom: 1rem; }

/* Project Detail */
.project-sidebar { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius); padding: 2rem; position: sticky; top: 100px; }
.project-meta { list-style: none; padding: 0; }
.project-meta li { padding: 0.75rem 0; border-bottom: 1px solid var(--border-color); }
.tech-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tech-tag { background: rgba(99,102,241,0.1); color: var(--primary); padding: 0.375rem 0.875rem; border-radius: 50px; font-size: 0.875rem; font-weight: 500; }
.gallery-thumb { transition: var(--transition); cursor: pointer; }
.gallery-thumb:hover { transform: scale(1.03); box-shadow: var(--shadow); }

/* FAQ */
.accordion-item { background: var(--bg-card); border: 1px solid var(--border-color) !important; margin-bottom: 0.5rem; border-radius: var(--radius) !important; overflow: hidden; }
.accordion-button { background: var(--bg-card); color: var(--text-primary); font-weight: 600; }
.accordion-button:not(.collapsed) { background: rgba(99,102,241,0.1); color: var(--primary); box-shadow: none; }
.accordion-body { color: var(--text-secondary); }

/* Footer */
.footer-section { background: var(--bg-section); border-top: 1px solid var(--border-color); padding: 4rem 0 2rem; }
.footer-brand { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; }
.footer-title { font-weight: 700; margin-bottom: 1.25rem; color: var(--text-primary); }
.footer-links { list-style: none; padding: 0; }
.footer-links li { margin-bottom: 0.5rem; }
.footer-links a { color: var(--text-secondary); }
.footer-links a:hover { color: var(--primary); }
.social-links { display: flex; gap: 0.75rem; }
.social-links a {
    width: 40px; height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
}
.social-links a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* WhatsApp Float */
.whatsapp-float {
    position: fixed; bottom: 2rem; right: 2rem;
    width: 60px; height: 60px;
    background: #25d366; color: #fff;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.75rem;
    box-shadow: 0 4px 12px rgba(37,211,102,0.4);
    z-index: 999;
    transition: var(--transition);
}
.whatsapp-float:hover { transform: scale(1.1); color: #fff; box-shadow: 0 6px 20px rgba(37,211,102,0.5); }

/* Pagination */
.page-link { color: var(--primary); border-color: var(--border-color); background: var(--bg-card); }
.page-item.active .page-link { background: var(--primary); border-color: var(--primary); }

/* Responsive */
@media (max-width: 768px) {
    .section-padding { padding: 3rem 0; }
    .hero-title { font-size: 2rem; }
    .hero-buttons .btn { display: block; width: 100%; margin: 0.5rem 0 !important; }
    .whatsapp-float { width: 50px; height: 50px; font-size: 1.5rem; bottom: 1.5rem; right: 1.5rem; }
}