/* project.css — phong cách riêng cho trang project detail */
:root {
  --bg: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --accent: #2563eb;
  --card: #f8fafc;
  --radius: 12px;
  --container: 1100px;
}

* {
  box-sizing: border-box;
}
body {
  font-family: Inter, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  margin: 0;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.container {
  width: 90%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 2rem 0;
}

/* Header */
.pg-header {
  border-bottom: 1px solid #e6e9ee;
  background: #fff;
}
.pg-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 0;
}
.logo {
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
}
.pg-nav a {
  margin-left: 1.2rem;
  text-decoration: none;
  color: var(--muted);
  font-weight: 500;
}

/* HERO */
.hero {
  padding: 2.2rem 0;
  background: linear-gradient(180deg, #fbfdff 0%, #ffffff 100%);
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 480px;
  gap: 2rem;
  align-items: center;
}
.project-title {
  margin: 0 0 0.6rem 0;
  font-size: 2rem;
  letter-spacing: -0.02em;
}
.project-sub {
  color: var(--muted);
  margin-top: 0;
}
.meta {
  list-style: none;
  padding: 0;
  margin: 1rem 0;
  color: var(--muted);
}
.meta li {
  margin-bottom: 0.3rem;
  font-size: 0.95rem;
}

/* Actions */
.btn {
  display: inline-block;
  padding: 0.6rem 1rem;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  margin-right: 0.6rem;
  font-weight: 600;
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
}
.btn-ghost {
  background: transparent;
  color: var(--muted);
}

/* Mockup image */
.mockup {
  background: linear-gradient(180deg, #fff, #f8fafc);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
}
.mockup img {
  max-width: 100%;
  display: block;
  border-radius: 8px;
  object-fit: cover;
}

/* Sections */
.section {
  padding: 2rem 0;
  border-top: 1px solid #f1f5f9;
}
.section-title {
  font-size: 1.2rem;
  margin: 0 0 1rem 0;
  color: var(--text);
}

/* Two column */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 1rem;
  color: var(--muted);
}

/* Features grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}
.feature-card {
  background: var(--card);
  padding: 1rem;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.04);
}

/* Process list */
.process {
  margin-top: 1rem;
  padding-left: 1.2rem;
  color: var(--muted);
}

/* Challenges */
.challenge-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1rem;
}
.challenge {
  background: #fff;
  padding: 1rem;
  border-radius: 10px;
  border: 1px solid #eef2f7;
}

/* Results/stats */
.stats {
  display: flex;
  gap: 1.2rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}
.stat {
  background: var(--card);
  padding: 1rem;
  border-radius: 10px;
  min-width: 140px;
  text-align: center;
}
.stat .num {
  display: block;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}
.stat .label {
  color: var(--muted);
}

/* Testimonial */
.testimonial {
  margin-top: 1rem;
  padding: 1rem 1.2rem;
  border-left: 4px solid var(--accent);
  color: var(--muted);
  background: #fbfdff;
  border-radius: 8px;
}

/* Footer */
.pg-footer {
  border-top: 1px solid #e6e9ee;
  padding: 1.2rem 0;
  background: #fff;
}
.pg-footer .container {
  display: flex;
  justify-content: center;
  color: var(--muted);
}

/* Responsive */
@media (max-width: 980px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .two-col {
    grid-template-columns: 1fr;
  }
  .challenge-grid {
    grid-template-columns: 1fr;
  }
  .pg-nav {
    display: none;
  }
}
