/* --- CSS VARIABLES & THEME --- */
:root {
    --primary: #4F46E5;        /* Indigo 600 */
    --primary-hover: #4338CA;  /* Indigo 700 */
    --primary-light: #EEF2FF;  /* Indigo 50 */
    --dark: #0F172A;           /* Slate 900 */
    --surface: #FFFFFF;
    --light: #F8FAFC;          /* Slate 50 */
    --muted: #64748B;          /* Slate 500 */
    --border: #E2E8F0;         /* Slate 200 */
    --success: #10B981;        /* Emerald 500 */
    --danger: #EF4444;         /* Red 500 */
    
    --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    --shadow-inner: inset 0 2px 4px 0 rgba(0,0,0,0.06);
    
    --radius: 12px;
    --font-base: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- RESET & BASE --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: var(--font-base); font-size: 16px; line-height: 1.6; color: var(--dark); background-color: var(--surface); text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-hover); }
img, svg { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: transparent; }

/* Focus States for Accessibility */
*:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* --- TYPOGRAPHY --- */
h1, h2, h3, h4, h5 { font-weight: 800; line-height: 1.2; color: var(--dark); }
.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-md { font-size: 1.125rem; }
.text-lg { font-size: 1.25rem; }
.text-xl { font-size: 1.5rem; }
.text-4xl { font-size: 2.25rem; line-height: 1; }
.font-bold { font-weight: 700; }
.uppercase { text-transform: uppercase; }
.tracking-wide { letter-spacing: 0.05em; }
.line-height-lg { line-height: 1.8; }
.text-center { text-align: center; } .text-left { text-align: left; } .text-right { text-align: right; }

/* --- COLORS & BACKGROUNDS --- */
.text-primary { color: var(--primary); } .text-muted { color: var(--muted); } .text-dark { color: var(--dark); } .text-white { color: #FFFFFF; } .text-success { color: var(--success); } .text-danger { color: var(--danger); }
.bg-primary { background-color: var(--primary); } .bg-light { background-color: var(--light); } .bg-surface { background-color: var(--surface); } .bg-white { background-color: #FFFFFF; } .bg-dark { background-color: var(--dark); }
.opacity-5 { opacity: 0.05; } .opacity-10 { opacity: 0.1; } .opacity-70 { opacity: 0.7; } .opacity-80 { opacity: 0.8; } .opacity-90 { opacity: 0.9; }

/* --- SPACING & SIZING --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.w-100 { width: 100%; } .h-100 { height: 100%; } .max-w-300 { max-width: 300px; } .max-w-500 { max-width: 500px; } .max-w-700 { max-width: 700px; }
.mx-auto { margin-left: auto; margin-right: auto; }
.m-0 { margin: 0; } .mb-1 { margin-bottom: 0.25rem; } .mb-2 { margin-bottom: 0.5rem; } .mb-3 { margin-bottom: 1rem; } .mb-4 { margin-bottom: 1.5rem; } .mb-5 { margin-bottom: 3rem; }
.mt-2 { margin-top: 0.5rem; } .mt-3 { margin-top: 1rem; } .mt-4 { margin-top: 1.5rem; } .mt-5 { margin-top: 3rem; }
.p-2 { padding: 0.5rem; } .p-3 { padding: 1rem; } .p-4 { padding: 1.5rem; } .p-5 { padding: 3rem; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; } .px-2 { padding-left: 0.5rem; padding-right: 0.5rem; } .px-3 { padding-left: 1rem; padding-right: 1rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; } .py-3 { padding-top: 1rem; padding-bottom: 1rem; } .py-4 { padding-top: 1.5rem; padding-bottom: 1.5rem; } .py-5 { padding-top: 3rem; padding-bottom: 3rem; }
.py-lg { padding-top: 6rem; padding-bottom: 6rem; }

/* --- LAYOUT UTILS --- */
.d-flex { display: flex; } .d-block { display: block; } .inline-block { display: inline-block; } .flex-wrap { flex-wrap: wrap; } .flex-col { flex-direction: column; } .flex-1 { flex: 1; } .flex-shrink-0 { flex-shrink: 0; }
.align-center { align-items: center; } .align-start { align-items: flex-start; }
.justify-content-center { justify-content: center; } .justify-content-between { justify-content: space-between; }
.gap-2 { gap: 0.5rem; } .gap-3 { gap: 1rem; } .gap-4 { gap: 1.5rem; } .gap-5 { gap: 3rem; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

/* --- BORDERS & SHADOWS --- */
.border { border: 1px solid var(--border); } .border-top { border-top: 1px solid var(--border); } .border-bottom { border-bottom: 1px solid var(--border); } .border-left { border-left: 1px solid var(--border); }
.border-4 { border-width: 4px; }
.border-primary { border-color: var(--primary) !important; } .border-success { border-color: var(--success) !important; } .border-danger { border-color: var(--danger) !important; }
.border-radius { border-radius: var(--radius); } .border-circle { border-radius: 50%; } .border-radius-bottom { border-bottom-left-radius: var(--radius); border-bottom-right-radius: var(--radius); } .border-bottom-left-radius { border-bottom-left-radius: var(--radius); }
.shadow-sm { box-shadow: var(--shadow-sm); } .shadow-md { box-shadow: var(--shadow-md); } .shadow-lg { box-shadow: var(--shadow-lg); } .shadow-xl { box-shadow: var(--shadow-xl); } .shadow-inner { box-shadow: var(--shadow-inner); }
.drop-shadow-sm { filter: drop-shadow(0 1px 2px rgba(0,0,0,0.1)); } .drop-shadow-md { filter: drop-shadow(0 4px 6px rgba(0,0,0,0.1)); } .drop-shadow-lg { filter: drop-shadow(0 10px 15px rgba(0,0,0,0.15)); }

/* --- POSITIONS --- */
.relative, .position-relative { position: relative; } .absolute { position: absolute; } .position-sticky { position: sticky; }
.top-0 { top: 0; } .left-0 { left: 0; } .right-0 { right: 0; } .left-50 { left: 50%; }
.transform-translate-x-half { transform: translateX(-50%); } .transform-scale-105 { transform: scale(1.05); }
.z-index-10 { z-index: 10; } .overflow-hidden { overflow: hidden; }

/* --- BUTTONS & BADGES --- */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 0.75rem 1.5rem; border-radius: 8px; font-weight: 600; text-align: center; transition: var(--transition); border: 1px solid transparent; line-height: 1.2; text-decoration: none; }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn-lg { padding: 1rem 2rem; font-size: 1.125rem; }
.btn-primary { background-color: var(--primary); color: white; border-color: var(--primary); }
.btn-primary:hover { background-color: var(--primary-hover); border-color: var(--primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); color: white; }
.btn-outline { background-color: transparent; color: var(--primary); border-color: var(--border); }
.btn-outline:hover { border-color: var(--primary); background-color: var(--primary-light); color: var(--primary-hover); }
.btn-white { background-color: #FFFFFF; color: var(--primary); } .btn-white:hover { background-color: var(--light); color: var(--primary-hover); transform: translateY(-1px); }
.btn-outline-white { background-color: transparent; color: #FFFFFF; border-color: rgba(255,255,255,0.5); } .btn-outline-white:hover { border-color: #FFFFFF; background-color: rgba(255,255,255,0.1); color: white; }

.badge { display: inline-block; padding: 0.25rem 0.75rem; background-color: var(--primary-light); color: var(--primary); border-radius: 9999px; font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; }
.inline-badge { display: inline-block; padding: 0.4rem 1rem; background-color: rgba(79, 70, 229, 0.1); color: var(--primary); border-radius: 9999px; font-size: 0.875rem; font-weight: 700; border: 1px solid rgba(79, 70, 229, 0.2); }

/* --- FORMS --- */
.form-group label { font-weight: 600; color: var(--dark); font-size: 0.875rem; display: block; margin-bottom: 0.5rem; }
.form-control { width: 100%; padding: 0.75rem 1rem; border: 1px solid var(--border); border-radius: 8px; font-family: inherit; font-size: 1rem; color: var(--dark); background-color: #FFFFFF; transition: var(--transition); }
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15); }
.form-check { display: flex; align-items: flex-start; gap: 0.5rem; }
.form-check input[type="checkbox"] { margin-top: 0.2rem; cursor: pointer; }
.form-check label { margin-bottom: 0; cursor: pointer; }

/* --- COMPONENTS & SPECIFIC SECTIONS --- */
.card { background-color: var(--surface); border-radius: var(--radius); border: 1px solid var(--border); transition: var(--transition); }
.hover-lift { transition: transform 0.3s ease, box-shadow 0.3s ease; }
.hover-lift:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.list-styled { list-style: none; }
.list-styled li { position: relative; padding-left: 1.5rem; }
.list-styled li::before { content: "→"; position: absolute; left: 0; color: var(--primary); font-weight: bold; }
.pricing-list li::before { content: "✓"; }

.navbar { background-color: rgba(255, 255, 255, 0.95); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; transition: all 0.3s ease; }
.nav-container { display: flex; justify-content: space-between; align-items: center; padding: 1rem 1.5rem; }
.logo { display: flex; align-items: center; gap: 0.75rem; text-decoration: none; }
.nav-links { display: flex; gap: 1.5rem; align-items: center; }
.nav-links a { font-weight: 500; color: var(--muted); font-size: 0.9rem; position: relative; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-links a.active::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 100%; height: 2px; background-color: var(--primary); border-radius: 2px; }
.nav-actions { display: flex; gap: 1rem; }
.mobile-menu-btn { display: none; color: var(--dark); padding: 0.5rem; border-radius: 4px; }

.hero-section { background: linear-gradient(180deg, #F8FAFC 0%, #FFFFFF 100%); }
.hero-bg-gradient { position: absolute; top: -20%; left: -10%; width: 50%; height: 80%; background: radial-gradient(circle, rgba(79,70,229,0.08) 0%, rgba(255,255,255,0) 70%); z-index: 1; pointer-events: none; }

.timeline-container { position: relative; padding-left: 1.5rem; border-left: 2px solid var(--primary-light); margin-left: 1rem; }
.timeline-container .card::before { content: ''; position: absolute; top: 1.5rem; left: -1.5rem; width: 1.5rem; height: 2px; background-color: var(--primary-light); z-index: -1; }

.faq-item { transition: var(--transition); }
.faq-question { cursor: pointer; color: var(--dark); transition: color 0.2s; }
.faq-question:hover { color: var(--primary); }
.faq-icon { transition: transform 0.3s ease; }
.faq-question[aria-expanded="true"] .faq-icon { transform: rotate(180deg); color: var(--primary); }

.project-card { border: 1px solid transparent; } .project-card:hover { border-color: var(--primary-light); }
.filter-group .btn.active { background-color: var(--primary); color: white; border-color: var(--primary); }

.footer { background-color: var(--dark); color: #94A3B8; padding: 4rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 3rem; }
.footer-links { list-style: none; padding: 0; }
.footer-links li { margin-bottom: 0.75rem; }
.footer-links a { color: #94A3B8; } .footer-links a:hover { color: #FFFFFF; }
.footer-links.horizontal { display: flex; gap: 1rem; flex-wrap: wrap; }
.footer-links.horizontal li { margin-bottom: 0; }
.compliance-disclaimer { border: 1px solid #334155; padding: 1.5rem; border-radius: var(--radius); background-color: rgba(255,255,255,0.03); }

/* --- MODALS & COOKIES --- */
.modal { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; z-index: 1000; display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: opacity 0.3s ease, visibility 0.3s; }
.modal.active { opacity: 1; visibility: visible; }
.modal-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(15, 23, 42, 0.7); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }
.modal-content { position: relative; background-color: var(--surface); padding: 2.5rem; border-radius: 16px; width: 90%; max-width: 500px; max-height: 90vh; overflow-y: auto; box-shadow: var(--shadow-xl); transform: scale(0.95); transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275); }
.modal.active .modal-content { transform: scale(1); }
.modal-lg { max-width: 800px; }
.close-btn { position: absolute; top: 1.25rem; right: 1.25rem; background: var(--light); width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.25rem; color: var(--muted); transition: var(--transition); }
.close-btn:hover { background: #F1F5F9; color: var(--dark); }

.cookie-banner { position: fixed; bottom: 0; left: 0; width: 100%; background-color: var(--surface); border-top: 1px solid var(--border); box-shadow: 0 -4px 20px rgba(0,0,0,0.08); padding: 1.5rem 0; z-index: 999; transform: translateY(100%); transition: transform 0.4s ease; }
.cookie-banner:not(.hidden) { transform: translateY(0); display: block; }
.cookie-container { display: flex; justify-content: space-between; align-items: center; gap: 2rem; flex-wrap: wrap; }
.cookie-text { flex: 1; min-width: 300px; }
.cookie-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* UTILITY CLASSES */
.hidden { display: none !important; }

/* --- RESPONSIVE MEDIA QUERIES --- */
@media (max-width: 992px) {
    .nav-links, .nav-actions { display: none; }
    .mobile-menu-btn { display: block; }
    
    .navbar.menu-open { background-color: var(--surface); }
    .nav-links.menu-open, .nav-actions.menu-open { display: flex; flex-direction: column; width: 100%; position: absolute; left: 0; background-color: var(--surface); padding: 1.5rem; box-shadow: var(--shadow-md); border-bottom: 1px solid var(--border); z-index: 99; }
    .nav-links.menu-open { top: 70px; align-items: flex-start; gap: 1rem; }
    .nav-actions.menu-open { top: 380px; align-items: stretch; }
    
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .hero-section .container.grid-2 { display: flex; flex-direction: column-reverse; text-align: center; }
    .hero-content .d-flex { justify-content: center; }
    .footer-grid { grid-template-columns: 1fr; }
    .py-lg { padding-top: 4rem; padding-bottom: 4rem; }
    .transform-scale-105 { transform: none; }
}

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