/* ========== Base ========== */
:root {
  --primary-color: #2563eb;
  --primary-dark: #1d4ed8;
  --secondary-color: #7c3aed;
  --dark-color: #0f172a;
  --light-color: #f8fafc;
  --gray-color: #64748b;
  --light-gray: #e2e8f0;
  --transition: all 0.3s ease;
  --shadow: 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);
  --container-width: 1200px;
  --border-radius: 12px;
}

/* ========== Tabs (Services) ========== */
.tabs { max-width: 1100px; margin: 0 auto; }
.tab-list { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 20px; }
.tab-btn { padding: 10px 16px; border-radius: 999px; border: 1px solid #e2e8f0; background: #fff; color: #0f172a; font-weight: 600; cursor: pointer; transition: var(--transition); }
.tab-btn:hover { border-color: var(--primary-color); color: var(--primary-color); }
.tab-btn.active { background: var(--primary-color); color: #fff; border-color: var(--primary-color); box-shadow: var(--shadow); }
.tab-panels { margin-top: 10px; }
.tab-panel { display: none; background: #fff; border: 1px solid #eef2f7; border-radius: var(--border-radius); box-shadow: var(--shadow); padding: 24px; }
.tab-panel.active { display: block; }
.tab-panel .panel-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.tab-panel h3 { margin-top: 0; }
.tab-panel ul { margin: 8px 0 0 18px; list-style: disc; color: var(--gray-color); }

@media (max-width: 768px) {
  .tab-panel .panel-grid { grid-template-columns: 1fr; }
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  line-height: 1.6; color: var(--dark-color); background: #fff; overflow-x: hidden;
}
.container { width: 100%; max-width: var(--container-width); margin: 0 auto; padding: 0 20px; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
a { color: var(--primary-color); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }

h1,h2,h3,h4 { font-weight: 700; line-height: 1.2; margin-bottom: 1rem; }
h1 { font-size: 3.2rem; }
h2 { font-size: 2.2rem; }
h3 { font-size: 1.5rem; }
p { color: var(--gray-color); margin-bottom: 1.2rem; }

/* ========== Buttons ========== */
.btn { display: inline-block; padding: 12px 28px; border-radius: 50px; font-weight: 600; border: 2px solid transparent; transition: var(--transition); cursor: pointer; }
.btn-primary { background: var(--primary-color); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-secondary { background: transparent; color: var(--primary-color); border-color: var(--primary-color); }
.btn-secondary:hover { background: var(--primary-color); color: #fff; }
.btn-outline { background: transparent; color: var(--primary-color); border-color: var(--primary-color); }
.btn-outline:hover { background: var(--primary-color); color: #fff; }
.btn-light { background: #fff; color: var(--primary-color); }
.btn-light:hover { background: #f1f5f9; }
.btn-text { display: inline-flex; align-items: center; font-weight: 600; }
.btn-text i { margin-left: 8px; transition: var(--transition); }
.btn-text:hover i { transform: translateX(4px); }

/* ========== Header ========== */
.header { position: fixed; top: 0; left: 0; width: 100%; background: rgba(255,255,255,0.98); box-shadow: 0 2px 10px rgba(0,0,0,0.06); z-index: 1000; padding: 14px 0; transition: var(--transition); }
.header.scrolled { padding: 8px 0; box-shadow: 0 6px 18px rgba(0,0,0,0.08); }
.header .container { display: flex; justify-content: space-between; align-items: center; }
.logo h1 { font-size: 1.6rem; margin: 0; }
.logo span { color: var(--primary-color); }
.main-nav ul { display: flex; align-items: center; }
.main-nav li { margin-left: 26px; }
.main-nav a { color: var(--dark-color); font-weight: 500; position: relative; padding: 5px 0; }
.main-nav a:after { content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0; background: var(--primary-color); transition: var(--transition); }
.main-nav a:hover:after, .main-nav a.active:after { width: 100%; }
.mobile-menu-btn { display: none; width: 30px; height: 21px; flex-direction: column; justify-content: space-between; cursor: pointer; }
.mobile-menu-btn span { height: 3px; background: var(--dark-color); width: 100%; }

/* ========== Hero ========== */
.hero { padding: 160px 0 90px; background: linear-gradient(135deg,#fbfdff 0%,#f2f7ff 100%); position: relative; overflow: hidden; }
.hero .container { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-content { max-width: 600px; }
.hero p { font-size: 1.15rem; }
.hero-cta { display: flex; gap: 12px; margin-top: 18px; }
.hero-visualization { height: 400px; background: #fff; border-radius: var(--border-radius); box-shadow: var(--shadow-lg); display: flex; align-items: center; justify-content: center; overflow: hidden; }
#data-visualization { width: 100%; height: 100%; padding: 16px; }

/* ========== Sections ========== */
.section-title { text-align: center; margin-bottom: 46px; position: relative; padding-bottom: 14px; }
.section-title:after { content: ""; position: absolute; left: 50%; transform: translateX(-50%); bottom: 0; height: 4px; width: 80px; background: linear-gradient(90deg,var(--primary-color),var(--secondary-color)); border-radius: 2px; }
.section-padding { padding: 90px 0; }
.page-hero { padding: 140px 0 70px; background: linear-gradient(135deg,#f0f9ff 0%,#e0f2fe 100%); }
.page-hero .page-hero-content { max-width: 800px; margin: 0 auto; text-align: center; }

/* Pillars */
.pillars { padding: 90px 0; }
.pillars-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(260px,1fr)); gap: 26px; }
.pillar-card { background: #fff; border-radius: var(--border-radius); padding: 32px 24px; text-align: center; box-shadow: 0 10px 30px rgba(0,0,0,0.05); transition: var(--transition); }
.pillar-card:hover { transform: translateY(-8px); box-shadow: 0 16px 40px rgba(0,0,0,0.08); }
.pillar-icon { width: 74px; height: 74px; border-radius: 50%; margin: 0 auto 18px; display: grid; place-items: center; color: #fff; background: linear-gradient(135deg,var(--primary-color),var(--secondary-color)); font-size: 28px; }

/* Results ticker */
.results-ticker { background: linear-gradient(135deg,#3b82f6,#8b5cf6); color: #fff; padding: 26px 0; }
.ticker-track { display: flex; justify-content: space-around; flex-wrap: wrap; gap: 18px; }
.ticker-item { text-align: center; min-width: 190px; }
.ticker-item span { font-weight: 700; font-size: 2.2rem; }
.ticker-item p { color: rgba(255,255,255,0.9); margin: 4px 0 0; font-size: .9rem; letter-spacing: .5px; text-transform: uppercase; }

/* Case study preview */
.case-study-preview { padding: 90px 0; background: #fafcff; }
.case-study-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.roi-calculator { background: #fff; padding: 24px; border-radius: var(--border-radius); box-shadow: var(--shadow); margin: 20px 0; }
.slider-container { margin: 16px 0; }
input[type="range"]{ -webkit-appearance:none; appearance:none; width:100%; height:8px; border-radius:4px; background: var(--light-gray); }
input[type="range"]::-webkit-slider-thumb{ -webkit-appearance:none; width:22px; height:22px; border-radius:50%; background: var(--primary-color); cursor:pointer; }
.roi-results { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; margin-top: 14px; }
.roi-metric { background: #f8fafc; padding: 14px; border-radius: var(--border-radius); text-align:center; }
.metric-value { display:block; font-weight:700; font-size: 1.4rem; color: var(--primary-color); }
.case-study-visual { height: 380px; background:#fff; padding: 16px; border-radius: var(--border-radius); box-shadow: var(--shadow); }

/* Services preview */
.services-preview { padding: 90px 0; }
.services-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(240px,1fr)); gap: 24px; }
.service-card { background:#fff; border:1px solid #eef2f7; border-radius: var(--border-radius); padding: 28px 22px; text-align:center; transition: var(--transition); box-shadow: 0 5px 20px rgba(0,0,0,0.03); }
.service-card:hover { transform: translateY(-6px); box-shadow: 0 15px 36px rgba(0,0,0,0.08); }
.service-icon { width: 64px; height: 64px; border-radius: 18px; margin: 0 auto 16px; display:grid; place-items:center; color:#fff; background:linear-gradient(135deg,var(--primary-color),var(--secondary-color)); font-size:24px; }
.text-center { text-align:center; margin-top: 34px; }

/* CTA */
.cta { background: linear-gradient(135deg,var(--primary-color),var(--secondary-color)); color:#fff; padding: 90px 0; text-align:center; position: relative; overflow: hidden; }
.cta .container { max-width: 820px; }
.cta h2 { font-size: 2.1rem; }
.cta p { color: rgba(255,255,255,0.92); font-size: 1.1rem; }

/* Footer */
.footer { background: #0f172a; color: #e2e8f0; padding: 70px 0 0; }
.footer-grid { display:grid; grid-template-columns: repeat(auto-fit,minmax(220px,1fr)); gap: 30px; margin-bottom: 46px; }
.footer h3, .footer h4 { color: #fff; padding-bottom: 12px; position: relative; }
.footer h3:after, .footer h4:after { content: ""; position: absolute; left: 0; bottom: 0; width: 42px; height: 2px; background: var(--primary-color); }
.footer-about p { color: #94a3b8; }
.social-links { display:flex; gap: 12px; margin-top: 12px; }
.social-links a { width: 40px; height: 40px; display:grid; place-items:center; border-radius: 50%; background: rgba(255,255,255,0.08); color:#fff; }
.social-links a:hover { background: var(--primary-color); }
.footer-links a, .footer-services a { color: #94a3b8; display: inline-block; margin: 6px 0; }
.footer-links a:hover, .footer-services a:hover { color: #fff; transform: translateX(4px); }
.footer-contact li { display:flex; gap: 12px; margin: 8px 0; color: #94a3b8; }
.footer-contact i { color: var(--primary-color); margin-top: 3px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); text-align:center; padding: 18px 0; color:#94a3b8; font-size:.9rem; }

/* ========== Theme Toggle ========== */
.theme-toggle {
  border: 1px solid #e2e8f0;
  background: #fff;
  color: var(--dark-color);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: var(--transition);
}
.theme-toggle:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.theme-toggle i { font-size: 16px; }

/* ========== Services page ========== */
.services-section { padding: 90px 0; }
.services-section.bg-light { background: #fafcff; }
.section-header { text-align:center; max-width: 820px; margin: 0 auto 30px; }
.service-card-large { display: grid; grid-template-columns: 90px 1fr; gap: 20px; background: #fff; border-radius: var(--border-radius); padding: 24px; box-shadow: var(--shadow); border: 1px solid #eef2f7; }
.service-card-large + .service-card-large { margin-top: 20px; }
.service-features { margin: 14px 0; }
.service-features li { margin: 6px 0; color: var(--gray-color); }
.service-features i { color: var(--primary-color); margin-right: 8px; }

/* ========== About page ========== */
.about-mission, .about-story { max-width: 820px; margin: 0 auto 50px; text-align: center; }
.team-grid { display:grid; grid-template-columns: repeat(auto-fit,minmax(240px,1fr)); gap: 24px; }
.team-member { background:#fff; padding: 24px; border-radius: var(--border-radius); text-align:center; box-shadow: 0 5px 15px rgba(0,0,0,0.05); }
.member-image { width: 120px; height: 120px; border-radius: 50%; margin: 0 auto 14px; background: #e5e7eb; position: relative; overflow: hidden; }
.member-image:before { content:""; position:absolute; inset:0; background: linear-gradient(135deg,var(--primary-color),var(--secondary-color)); opacity:.12; }
.position { color: var(--primary-color); font-weight: 600; margin-bottom: 8px; }

/* ========== Contact page ========== */
.contact-container { display:grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info .info-item { display:flex; gap: 12px; margin: 12px 0; }
.contact-info i { color: var(--primary-color); margin-top: 4px; }
.contact-form { background:#fff; padding: 28px; border-radius: var(--border-radius); box-shadow: 0 5px 20px rgba(0,0,0,0.05); }
.form-group { margin-bottom: 16px; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 12px 14px; border: 1px solid #e2e8f0; border-radius: 10px; font: inherit; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--primary-color); }

/* ========== Insights page ========== */
.insights-grid { display:grid; grid-template-columns: repeat(auto-fill,minmax(300px,1fr)); gap: 24px; }
.insight-card { background:#fff; border-radius: var(--border-radius); overflow:hidden; box-shadow: 0 5px 15px rgba(0,0,0,0.05); transition: var(--transition); }
.insight-card:hover { transform: translateY(-6px); box-shadow: 0 15px 30px rgba(0,0,0,0.1); }
.insight-image { height: 190px; background-size: cover; background-position: center; }
.insight-content { padding: 20px; }
.insight-category { display:inline-block; padding: 4px 10px; border-radius: 50px; background:#e0f2fe; color: var(--primary-color); font-weight: 600; font-size: .8rem; margin-bottom: 10px; }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; gap: 36px; }
  .case-study-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .mobile-menu-btn { display: flex; }
  .main-nav { position: fixed; top: 74px; left:0; width:100%; background:#fff; transform: translateY(-160%); opacity: 0; transition: var(--transition); padding: 16px; box-shadow: 0 10px 20px rgba(0,0,0,0.08); }
  .main-nav.active { transform: translateY(0); opacity: 1; }
  .main-nav ul { flex-direction: column; align-items: flex-start; }
  .main-nav li { margin: 10px 0; }
  .hero { padding: 130px 0 70px; }
  .roi-results { grid-template-columns: 1fr; }
  .contact-container { grid-template-columns: 1fr; }
}

/* ===================== */
/* Dark mode (data-theme) */
/* ===================== */
:root[data-theme="dark"] {
  --dark-color: #e5e7eb; /* text */
  --light-color: #0b1220;
  --gray-color: #a3b0c2;
  --light-gray: #1f2a3a;
}

[data-theme="dark"] body { background: #0b1220; color: var(--dark-color); }
[data-theme="dark"] .header { background: rgba(10, 16, 28, 0.9); box-shadow: 0 2px 10px rgba(0,0,0,0.5); }
[data-theme="dark"] .mobile-menu-btn span { background: #e5e7eb; }
[data-theme="dark"] .main-nav a { color: #e5e7eb; }
[data-theme="dark"] .main-nav a:after { background: var(--primary-color); }
[data-theme="dark"] .hero { background: linear-gradient(135deg,#0e1627 0%, #0b1220 100%); }
[data-theme="dark"] .hero-visualization { background: #0f172a; }
[data-theme="dark"] .pillar-card,
[data-theme="dark"] .service-card,
[data-theme="dark"] .service-card-large,
[data-theme="dark"] .roi-calculator,
[data-theme="dark"] .case-study-visual,
[data-theme="dark"] .contact-form,
[data-theme="dark"] .insight-card { background: #0f172a; border-color: #132036; box-shadow: 0 10px 30px rgba(0,0,0,0.35); }
[data-theme="dark"] .metric-value { color: #93c5fd; }
[data-theme="dark"] .section-title:after { background: linear-gradient(90deg, #60a5fa, #a78bfa); }
[data-theme="dark"] .services-section.bg-light,
[data-theme="dark"] .case-study-preview { background: #0b1220; }
[data-theme="dark"] .footer { background: #0a0f1a; }
[data-theme="dark"] .footer-links a, [data-theme="dark"] .footer-services a, [data-theme="dark"] .footer-contact li { color: #a3b0c2; }
[data-theme="dark"] .theme-toggle { background: #0f172a; border-color: #233145; color: #e5e7eb; }
[data-theme="dark"] input[type="range"] { background: #1f2a3a; }
[data-theme="dark"] .btn-secondary { color: #93c5fd; border-color: #2563eb; }
[data-theme="dark"] .btn-secondary:hover { background: #2563eb; color: #fff; }
[data-theme="dark"] .btn-light { background: #e5e7eb; color: #0b1220; }
[data-theme="dark"] .page-hero { background: linear-gradient(135deg,#0e1627 0%, #0b1220 100%); }
[data-theme="dark"] .insight-category { background: #0e293f; color: #93c5fd; }
[data-theme="dark"] .contact-form input,
[data-theme="dark"] .contact-form select,
[data-theme="dark"] .contact-form textarea { background: #0b1220; color: #e5e7eb; border-color: #233145; }
[data-theme="dark"] .contact-form input::placeholder,
[data-theme="dark"] .contact-form textarea::placeholder { color: #6b7280; }