:root {
  --primary: #003b80;
  --primary-dark: #002956;
  --accent: #007bff;
  --text: #222;
  --muted: #666;
  --bg: #f7f8fb;
  --card-bg: #ffffff;
  --radius-lg: 18px;
  --shadow-soft: 0 12px 30px rgba(0, 0, 0, 0.08);
}

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

body {
  font-family: "Poppins", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  color: var(--text);
  background: #ffffff;
  line-height: 1.6;
}

a {
  text-decoration: none;
  color: inherit;
}

img {
  max-width: 100%;
  display: block;
}

.container-letter {
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Hero section now uses standard styles from about.css */


/* ---------- Case Studies section ---------- */
.case-section {
  padding: 60px 0 70px;
  background: var(--bg);
}

.case-header {
  text-align: center;
  margin-bottom: 34px;
}

.case-header h2 {
  font-size: 28px;
  margin-bottom: 10px;
}

.case-header p {
  max-width: 620px;
  margin: 0 auto;
  font-size: 14px;
  color: var(--muted);
}

.case-filters {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 26px;
}

.filter-btn {
  border: 1px solid rgba(0, 0, 0, 0.08);
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  background: #ffffff;
  cursor: pointer;
  transition: all 0.18s ease-out;
}

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

.case-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 26px;
}

@media (max-width: 768px) {
  .case-grid {
    grid-template-columns: minmax(0, 1fr);
  }
}

.case-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.18s ease-out, box-shadow 0.18s ease-out;
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.12);
}

.case-image {
  position: relative;
  overflow: hidden;
}

.case-image img {
  width: 100%;
  height: 100%;
  object-fit: unset;
  transition: transform 0.25s ease-out;
}

.case-card:hover .case-image img {
  transform: scale(1.05);
}

.case-tag {
  position: absolute;
  left: 16px;
  top: 16px;
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: rgba(0, 0, 0, 0.7);
  color: #ffffff;
}

.case-body {
  padding: 18px 20px 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.case-client {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 4px;
}

.case-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.case-summary {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 10px;
  flex: 1;
}

.case-meta {
  font-size: 12px;
  color: var(--muted);
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
}

.case-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.case-label {
  font-size: 12px;
  color: var(--muted);
}

.btn-download {
  border: none;
  background: var(--accent);
  color: #ffffff;
  font-size: 13px;
  padding: 7px 18px;
  border-radius: 999px;
  cursor: pointer;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  transition: background 0.15s ease-out, transform 0.15s ease-out;
}

.btn-download:hover {
  background: #005fcc;
  transform: translateY(-1px);
}


/* ---------- Responsive Fix ---------- */
@media (max-width: 992px) {
  .case-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .footer-container {
    flex-direction: column;
    padding: 0 20px;
    gap: 30px;
  }

  .footer-col {
    width: 100%;
  }
}

@media (max-width: 425px) {
  .header .logo img {
    margin-left: 1%;
  }
}