/* ===========================
   Tixy Labs — Premium CSS
   =========================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* --- Variables --- */
:root {
  --bg: #ffffff;
  --bg-soft: #f5f5f7;
  --bg-dark: #1d1d1f;
  --text: #1d1d1f;
  --text-mid: #3d3d3f;
  --text-soft: #6e6e73;
  --text-xsoft: #a1a1a6;
  --accent: #0066cc;
  --accent-hover: #0055aa;
  --border: #d2d2d7;
  --border-light: #e8e8ed;
  --white: #ffffff;
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.25s ease;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 16px rgba(0,0,0,0.08), 0 1px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 20px 60px rgba(0,0,0,0.10), 0 4px 16px rgba(0,0,0,0.06);
  --container: 1080px;
  --section-pad: 100px;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }
ul { list-style: none; }

/* --- Typography --- */
h1, h2, h3, h4, h5 { line-height: 1.15; font-weight: 600; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.4rem, 5vw, 4rem); font-weight: 700; letter-spacing: -0.03em; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); font-weight: 600; }
h4 { font-size: 1.1rem; font-weight: 600; }
p { color: var(--text-mid); line-height: 1.75; }
.text-soft { color: var(--text-soft); }
.text-xs { font-size: 0.8rem; }
.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-soft);
}

/* --- Layout --- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}
section { padding: var(--section-pad) 0; }
.section-alt { background: var(--bg-soft); }
.section-dark { background: var(--bg-dark); color: var(--white); }
.section-dark p { color: rgba(255,255,255,0.7); }
.section-dark h2 { color: var(--white); }

/* --- Navigation --- */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}
nav.scrolled {
  border-bottom-color: var(--border-light);
  box-shadow: 0 1px 0 rgba(0,0,0,0.04);
}
.nav-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}
.nav-logo span { color: var(--accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  font-size: 0.9rem;
  font-weight: 450;
  color: var(--text-mid);
  transition: color var(--transition);
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); }
.nav-cta {
  font-size: 0.85rem;
  font-weight: 600;
  padding: 8px 18px;
  background: var(--text);
  color: var(--white) !important;
  border-radius: 8px;
  transition: background var(--transition), transform var(--transition);
}
.nav-cta:hover { background: var(--text-mid) !important; transform: translateY(-1px); }
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.nav-hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 999;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(20px);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 36px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.02em;
  transition: color var(--transition);
}
.mobile-menu a:hover { color: var(--accent); }
.mobile-menu-close {
  position: absolute;
  top: 20px; right: 24px;
  font-size: 1.5rem;
  color: var(--text-soft);
  cursor: pointer;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 10px;
  transition: all var(--transition);
  white-space: nowrap;
  cursor: pointer;
}
.btn-primary {
  background: var(--text);
  color: var(--white);
  border: 2px solid var(--text);
}
.btn-primary:hover {
  background: var(--text-mid);
  border-color: var(--text-mid);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 2px solid var(--border);
}
.btn-secondary:hover {
  border-color: var(--text);
  transform: translateY(-2px);
}
.btn-accent {
  background: var(--accent);
  color: var(--white);
  border: 2px solid var(--accent);
}
.btn-accent:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,102,204,0.3);
}
.btn-ghost {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.4);
}
.btn-ghost:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.1);
}
.btn-lg { padding: 17px 36px; font-size: 1.05rem; border-radius: 12px; }

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  background: var(--bg);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -20%;
  width: 70vw;
  height: 70vw;
  background: radial-gradient(circle, rgba(0,102,204,0.04) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}
.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-soft);
  background: var(--bg-soft);
  border: 1px solid var(--border-light);
  border-radius: 100px;
  padding: 6px 14px;
  margin-bottom: 32px;
}
.hero-label .dot {
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
}
.hero h1 {
  margin-bottom: 24px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-soft);
  max-width: 560px;
  margin: 0 auto 48px;
  line-height: 1.7;
}
.hero-ctas {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0.4;
}
.hero-scroll span { font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-soft); }
.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--text-soft), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* --- Section headers --- */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-header .label { margin-bottom: 16px; display: block; }
.section-header h2 { margin-bottom: 16px; }
.section-header p {
  font-size: 1.1rem;
  max-width: 520px;
  margin: 0 auto;
  color: var(--text-soft);
}

/* --- Service Cards --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.service-card {
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border);
}
.service-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: var(--bg-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.service-icon svg { width: 22px; height: 22px; stroke: var(--text); stroke-width: 1.5; fill: none; }
.service-card h3 { margin-bottom: 10px; font-size: 1.1rem; }
.service-card p { font-size: 0.95rem; color: var(--text-soft); line-height: 1.65; }

/* --- Feature / How section --- */
.features-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px 80px;
}
.feature-item {}
.feature-number {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 12px;
}
.feature-item h3 { margin-bottom: 10px; font-size: 1.15rem; }
.feature-item p { font-size: 0.95rem; color: var(--text-soft); }

/* --- Stats / credibility --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2px;
  background: var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.stat-item {
  background: var(--bg);
  padding: 40px 36px;
  text-align: center;
}
.stat-value {
  font-size: 2.4rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-label { font-size: 0.875rem; color: var(--text-soft); }

/* --- CTA Section --- */
.cta-section {
  background: var(--bg-dark);
  color: var(--white);
  text-align: center;
  padding: 120px 24px;
}
.cta-section h2 { color: var(--white); margin-bottom: 20px; }
.cta-section p { color: rgba(255,255,255,0.6); max-width: 480px; margin: 0 auto 40px; font-size: 1.1rem; }
.cta-section .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* --- Page Hero (inner pages) --- */
.page-hero {
  padding: 140px 0 80px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border-light);
}
.page-hero-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.page-hero .label { display: block; margin-bottom: 20px; }
.page-hero h1 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 20px; }
.page-hero p {
  font-size: 1.15rem;
  color: var(--text-soft);
  max-width: 580px;
  line-height: 1.7;
}

/* --- About page --- */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.about-content p { margin-bottom: 20px; }
.about-content p:last-child { margin-bottom: 0; }
.about-values {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.about-value {
  padding: 28px;
  background: var(--bg-soft);
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
}
.about-value h4 { margin-bottom: 6px; font-size: 1rem; }
.about-value p { font-size: 0.9rem; color: var(--text-soft); }
.disclaimer-box {
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 24px 28px;
  background: var(--bg-soft);
  margin-top: 40px;
}
.disclaimer-box p { font-size: 0.9rem; color: var(--text-soft); margin: 0; }

/* --- Services page --- */
.services-full {
  display: flex;
  flex-direction: column;
  gap: 80px;
}
.service-full-item {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 60px;
  padding-bottom: 80px;
  border-bottom: 1px solid var(--border-light);
}
.service-full-item:last-child { border-bottom: none; padding-bottom: 0; }
.service-full-meta {}
.service-full-meta h3 { font-size: 1.4rem; margin-bottom: 12px; }
.service-full-meta .label { margin-bottom: 12px; display: block; }
.service-full-body p { margin-bottom: 16px; font-size: 1rem; }
.service-full-body p:last-child { margin-bottom: 0; }
.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}
.tag {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 5px 12px;
  border-radius: 100px;
  background: var(--bg-soft);
  border: 1px solid var(--border-light);
  color: var(--text-mid);
}

/* --- Contact page --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 80px;
  align-items: start;
}
.contact-info {}
.contact-info h3 { margin-bottom: 16px; }
.contact-info p { margin-bottom: 28px; color: var(--text-soft); }
.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}
.contact-detail-icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: var(--bg-soft);
  border: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-detail-icon svg { width: 18px; height: 18px; stroke: var(--text-mid); stroke-width: 1.5; fill: none; }
.contact-detail-text strong { display: block; font-size: 0.85rem; color: var(--text); margin-bottom: 2px; }
.contact-detail-text span { font-size: 0.9rem; color: var(--text-soft); }
.contact-form-wrap {
  background: var(--bg-soft);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 48px 44px;
}

/* --- Forms --- */
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-mid);
  margin-bottom: 8px;
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.95rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  -webkit-appearance: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,102,204,0.1);
}
.form-group textarea { height: 140px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-note { font-size: 0.8rem; color: var(--text-xsoft); margin-top: 16px; text-align: center; }

/* --- Footer --- */
footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.7);
  padding: 60px 0 40px;
}
.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .nav-logo {
  color: var(--white);
  margin-bottom: 16px;
  display: block;
}
.footer-brand p { font-size: 0.875rem; line-height: 1.7; color: rgba(255,255,255,0.5); }
.footer-col h5 {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.5);
  margin-bottom: 20px;
}
.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.65);
  margin-bottom: 12px;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--white); }
.footer-bottom {
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 0.8rem; color: rgba(255,255,255,0.4); }
.footer-bottom a { color: rgba(255,255,255,0.4); transition: color var(--transition); }
.footer-bottom a:hover { color: rgba(255,255,255,0.7); }

/* --- Animations --- */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-up.delay-1 { transition-delay: 0.1s; }
.fade-up.delay-2 { transition-delay: 0.2s; }
.fade-up.delay-3 { transition-delay: 0.3s; }
.fade-up.delay-4 { transition-delay: 0.4s; }
.fade-up.delay-5 { transition-delay: 0.5s; }

/* --- Misc --- */
.divider { height: 1px; background: var(--border-light); margin: 0; }
.badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(0,102,204,0.08);
  color: var(--accent);
  letter-spacing: 0.02em;
}
.check-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
}
.check-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  color: var(--text-mid);
}
.check-list li::before {
  content: '';
  display: inline-block;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--bg-soft);
  border: 1.5px solid var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2 6l3 3 5-5' stroke='%230066cc' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

/* --- Responsive --- */
@media (max-width: 900px) {
  :root { --section-pad: 72px; }
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  h1 { font-size: clamp(2rem, 8vw, 3rem); }
  .features-list { grid-template-columns: 1fr; gap: 36px; }
  .about-content { grid-template-columns: 1fr; gap: 48px; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 40px; }
  .service-full-item { grid-template-columns: 1fr; gap: 24px; }
}
@media (max-width: 640px) {
  :root { --section-pad: 56px; }
  .hero { min-height: 92vh; padding: 100px 0 64px; }
  .hero-ctas { flex-direction: column; align-items: center; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 32px 24px; }
  .footer-top { grid-template-columns: 1fr; gap: 36px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .services-grid { grid-template-columns: 1fr; }
}