:root {
  --primary: #0d9488;
  --primary-hover: #0f766e;
  --accent: #f59e0b;
  --bg-main: #f8fafc;
  --bg-card: #ffffff;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -2px rgba(0,0,0,0.04);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--primary-hover);
}

/* Navbar */
.navbar {
  background-color: #ffffff;
  border-bottom: 1px solid var(--border-color);
  padding: 0.85rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.nav-brand img {
  height: 40px;
  width: auto;
  border-radius: 6px;
}

.nav-brand .brand-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #0f172a;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-link {
  color: #475569;
  font-size: 0.95rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
  width: 100%;
  flex: 1;
}

/* Hero Banner */
.hero-banner {
  background: linear-gradient(135deg, #134e4a 0%, #0d9488 60%, #065f46 100%);
  border-radius: 16px;
  padding: 2.5rem;
  color: #ffffff;
  margin-bottom: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 10px 25px -5px rgba(13, 148, 136, 0.3);
}

.hero-text h1 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.hero-text p {
  color: #ccfbf1;
  font-size: 1.05rem;
  max-width: 650px;
}

/* Category Grid */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.cat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.25rem;
  text-align: center;
  transition: all 0.2s;
  box-shadow: var(--shadow-sm);
}

.cat-card:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.cat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: #f0fdfa;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin: 0 auto 0.75rem auto;
}

.cat-title {
  font-weight: 700;
  font-size: 1rem;
  color: #1e293b;
}

/* Service Card Grid */
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s;
}

.service-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.service-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
}

.service-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #0f172a;
}

.service-intro {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 1.25rem;
}

.service-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 1rem;
  border-top: 1px solid var(--border-color);
}

.price-tag {
  font-size: 1.4rem;
  font-weight: 800;
  color: #e11d48;
}

.market-price {
  font-size: 0.85rem;
  color: #94a3b8;
  text-decoration: line-through;
  margin-left: 0.4rem;
}

/* Technician Card Grid */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 1.25rem;
  margin-bottom: 3rem;
}

.tech-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s;
}

.tech-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.tech-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 0.75rem auto;
  border: 3px solid #ccfbf1;
}

.tech-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 0.25rem;
}

.tech-title {
  font-size: 0.82rem;
  color: var(--primary);
  font-weight: 600;
  background: #f0fdfa;
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 0.75rem;
}

.tech-stats {
  display: flex;
  justify-content: space-around;
  padding: 0.75rem 0;
  border-top: 1px dashed var(--border-color);
  border-bottom: 1px dashed var(--border-color);
  margin-bottom: 1rem;
  font-size: 0.85rem;
}

.tech-stats strong {
  display: block;
  font-size: 1rem;
  color: #0f172a;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.6rem 1.25rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s;
}

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

.btn-primary:hover {
  background: var(--primary-hover);
  color: #ffffff;
}

.btn-secondary {
  background: #f1f5f9;
  color: #334155;
}

.btn-secondary:hover {
  background: #e2e8f0;
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.85rem;
}

/* Guarantee row */
.guarantee-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 3rem;
}

.guarantee-box {
  background: #f0fdfa;
  border: 1px solid #ccfbf1;
  border-radius: 12px;
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.guarantee-box i {
  font-size: 1.8rem;
  color: var(--primary);
}

.guarantee-box h4 {
  font-size: 0.95rem;
  color: #0f766e;
}

.guarantee-box p {
  font-size: 0.8rem;
  color: #115e59;
}

/* Toast */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: #0f172a;
  color: #fff;
  border-radius: 8px;
  padding: 0.75rem 1.25rem;
  box-shadow: 0 10px 25px rgba(0,0,0,0.3);
  z-index: 1000;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Footer */
footer {
  background: #ffffff;
  border-top: 1px solid var(--border-color);
  padding: 2.5rem 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 4rem;
}