/* --- Base --- */
:root {
  --bg-color: #0f172a;       /* deep blue background */
  --card-bg: #1e293b;        /* card background */
  --text-main: #f8fafc;      /* primary text */
  --text-sub: #94a3b8;       /* secondary text */
  --accent: #38bdf8;         /* accent */
  --accent-hover: #0ea5e9;   /* accent hover */
  --border: #334155;         /* border */
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans",
    Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  background-color: var(--bg-color);
  color: var(--text-main);
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- Layout --- */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px;
}

/* --- Header --- */
header {
  text-align: center;
  padding: 60px 20px 40px;
}

header h1 {
  font-size: 3rem;
  margin-bottom: 10px;
  letter-spacing: 1px;
  background: linear-gradient(90deg, #38bdf8, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

header p {
  color: var(--text-sub);
  font-size: 1.1rem;
  max-width: 760px;
  margin: 0 auto;
}

.badge {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  color: var(--text-sub);
  font-size: 13px;
  margin-bottom: 14px;
}

/* --- App grid --- */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

/* --- Card --- */
.card {
  background-color: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
  border-color: var(--accent);
}

.card-image {
  height: 180px;
  background-color: #334155;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-sub);
  font-size: 3rem;
  user-select: none;
}

.card-content {
  padding: 25px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.5rem;
}

.card p {
  color: var(--text-sub);
  font-size: 0.95rem;
  margin: 0 0 18px;
  flex-grow: 1;
}

.tags {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.tag {
  background-color: rgba(56, 189, 248, 0.1);
  color: var(--accent);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.btn-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 8px;
  justify-content: center;
}

.btn {
  display: inline-block;
  background-color: var(--accent);
  color: #0f172a;
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 8px;
  font-weight: 700;
  text-align: center;
  transition: background 0.2s;
  white-space: nowrap;
  box-sizing: border-box;
}

.btn:hover { background-color: var(--accent-hover); }

.btn.secondary {
  background: rgba(255,255,255,0.06);
  color: var(--text-main);
  border: 1px solid var(--border);
}
.btn.secondary:hover {
  background: rgba(255,255,255,0.10);
}

.legal-link {
  font-size: 12px;
  padding: 8px 12px;
}

.btn-column {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.btn-active {
  width: 100%;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

.btn-inactive {
  background-color: rgba(56, 189, 248, 0.1);
  color: var(--text-sub);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
}

/* .btn-column.inactive {
  padding: 12px;
  border-radius: 10px;
  border: 1px dashed var(--border);
  background: rgba(0, 255, 255, 0.03);
}

.btn.btn-disabled {
  background: transparent;
  color: var(--text-sub);
  border: 1px dashed var(--border);
  cursor: not-allowed;
  pointer-events: none; */
}

/* --- Sections --- */
.section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin: 8px 0 14px;
}
.section-title h2 {
  margin: 0;
  font-size: 1.2rem;
  letter-spacing: 0.4px;
}
.muted { color: var(--text-sub); }

/* --- Footer --- */
footer {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-sub);
  border-top: 1px solid var(--border);
  font-size: 0.95rem;
}
footer .small { font-size: 0.9rem; }