/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #ffffff;
  --bg-secondary: #f5f5f7;
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-tertiary: #86868b;
  --accent: #0071e3;
  --accent-hover: #0077ed;
  --border: #d2d2d7;
  --card-bg: #ffffff;
  --shadow: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
  --radius: 18px;
  --nav-height: 52px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Nav ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(255,255,255,0.82);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.08);
  transition: background 0.3s;
}

.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.3px;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-secondary);
  transition: color 0.2s;
}

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

/* ===== Lang Toggle ===== */
.lang-toggle {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 980px;
  padding: 5px 14px;
  font-size: 12px;
  font-weight: 600;
  font-family: var(--font);
  color: var(--text-secondary);
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.lang-toggle:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 980px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
  font-family: var(--font);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  transform: scale(1.02);
}

.btn-secondary {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid var(--accent);
}

.btn-secondary:hover {
  background: rgba(0, 113, 227, 0.06);
  transform: scale(1.02);
}

.btn-full { width: 100%; }

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-height) + 60px) 24px 80px;
  background: linear-gradient(180deg, #fbfbfd 0%, #f5f5f7 100%);
  position: relative;
}

.hero-eyebrow {
  font-size: 14px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.02em;
  margin-bottom: 20px;
  opacity: 0;
  animation: fadeUp 0.7s 0.1s forwards;
}

.hero-title {
  font-size: clamp(52px, 8vw, 96px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  color: var(--text-primary);
  margin-bottom: 20px;
  opacity: 0;
  animation: fadeUp 0.7s 0.25s forwards;
}

.hero-subtitle {
  font-size: clamp(18px, 2.5vw, 24px);
  font-weight: 300;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
  margin-bottom: 44px;
  opacity: 0;
  animation: fadeUp 0.7s 0.4s forwards;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.7s 0.55s forwards;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  opacity: 0;
  animation: fadeUp 0.7s 1s forwards;
}

.hero-scroll-hint span {
  display: block;
  width: 1.5px;
  height: 40px;
  background: linear-gradient(to bottom, var(--border), transparent);
  animation: scrollLine 1.8s ease-in-out infinite;
}

/* ===== Sections ===== */
.section {
  padding: 100px 0;
}

.section-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(32px, 4.5vw, 52px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--text-primary);
  margin-bottom: 20px;
}

.section-title.center { text-align: center; }

.section-desc {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 56px;
  line-height: 1.65;
}

.section-desc.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

/* ===== About ===== */
.about { background: var(--bg); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-text p {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-top: 20px;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.stat-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.stat-number {
  font-size: 44px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  line-height: 1;
}

.stat-label {
  font-size: 14px;
  color: var(--text-tertiary);
  font-weight: 400;
}

/* ===== Services ===== */
.services { background: var(--bg-secondary); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(0,113,227,0.1);
}

.service-icon {
  width: 48px;
  height: 48px;
  background: rgba(0,113,227,0.08);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.service-icon svg {
  width: 22px;
  height: 22px;
  color: var(--accent);
}

.service-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.service-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===== Contact ===== */
.contact { background: var(--bg); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 64px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding-top: 8px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.contact-icon {
  width: 44px;
  height: 44px;
  background: var(--bg-secondary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon svg {
  width: 20px;
  height: 20px;
  color: var(--accent);
}

.contact-label {
  display: block;
  font-size: 12px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: 4px;
}

.contact-value {
  display: block;
  font-size: 16px;
  color: var(--text-primary);
  font-weight: 400;
  transition: color 0.2s;
}

a.contact-value:hover { color: var(--accent); }

/* ===== Form ===== */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-group label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
  padding: 13px 16px;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  font-size: 15px;
  font-family: var(--font);
  color: var(--text-primary);
  background: var(--bg);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-tertiary);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,113,227,0.12);
}

.form-success {
  display: none;
  text-align: center;
  font-size: 14px;
  color: #30b650;
  background: rgba(48,182,80,0.08);
  padding: 12px;
  border-radius: 10px;
  font-weight: 500;
}

.form-success.visible { display: block; }

/* ===== Footer ===== */
.footer {
  padding: 32px 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-logo {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.footer-copy {
  font-size: 13px;
  color: var(--text-tertiary);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-secondary);
  transition: color 0.2s;
}

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

/* ===== Animations ===== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; opacity: 1; }
  50%  { transform: scaleY(1); transform-origin: top; opacity: 1; }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
}

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 600px) {
  .nav-links { display: none; }
  .lang-toggle { padding: 4px 10px; }
  .services-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .footer-inner { justify-content: center; text-align: center; }
  .footer-links { justify-content: center; }
  .section { padding: 72px 0; }
}