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

:root {
  --bg: #f5f5f7;
  --card: #ffffff;
  --accent: #d6293e;
  --accent-light: #fef2f2;
  --accent2: #1d4ed8;
  --text: #1a1a1a;
  --text-secondary: #555;
  --muted: #888;
  --border: #e5e7eb;
  --shadow: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --success: #16a34a;
  --kurs: #ea580c;
  --yarisma: #d6293e;
  --kamp: #0891b2;
  --seminer: #7c3aed;
  --program: #16a34a;
  --sonuc: #64748b;
}

body {
  font-family: "Poppins", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.header {
  background: #ffffff;
  padding: 16px 20px;
  text-align: center;
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 2px solid var(--accent);
  box-shadow: var(--shadow);
}

.header h1 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
}

.header p {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 2px;
}

.notification-bar {
  display: none;
  padding: 10px 16px;
  background: var(--accent-light);
  text-align: center;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--accent);
  border-bottom: 1px solid var(--border);
  font-weight: 500;
}

.notification-bar.show {
  display: block;
}

.notification-bar.subscribed {
  background: #f0fdf4;
  color: var(--success);
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  padding: 12px 12px 4px;
}

.stat-card {
  background: var(--card);
  border-radius: 12px;
  padding: 10px 6px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.stat-card .num {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
}

.stat-card .label {
  font-size: 0.65rem;
  color: var(--muted);
  margin-top: 1px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.search-box {
  padding: 8px 12px;
}

.search-box input {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  color: var(--text);
  font-size: 0.85rem;
  box-shadow: var(--shadow);
  transition: border-color 0.2s;
}

.search-box input:focus {
  outline: none;
  border-color: var(--accent);
}

.search-box input::placeholder {
  color: var(--muted);
}

.controls {
  display: flex;
  gap: 8px;
  padding: 4px 12px 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.controls::-webkit-scrollbar {
  display: none;
}

.controls select,
.controls button {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card);
  color: var(--text);
  font-size: 0.78rem;
  white-space: nowrap;
  cursor: pointer;
  box-shadow: var(--shadow);
  -webkit-appearance: none;
  min-width: 0;
  flex-shrink: 0;
}

.controls select {
  padding-right: 28px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23888' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
}

.controls button {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

.controls button:active {
  opacity: 0.85;
}

.list {
  padding: 4px 12px 12px;
}

.faaliyet-card {
  background: var(--card);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 8px;
  border-left: 4px solid var(--accent);
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s, transform 0.1s;
}

.faaliyet-card:active {
  transform: scale(0.99);
  box-shadow: var(--shadow-md);
}

.faaliyet-card .baslik {
  font-size: 0.88rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.35;
  color: var(--text);
}

.faaliyet-card .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  font-size: 0.72rem;
}

.faaliyet-card .tag {
  padding: 3px 8px;
  border-radius: 20px;
  font-weight: 500;
}

.tag-kategori {
  background: var(--accent-light);
  color: var(--accent);
}

.tag-brans {
  background: #eff6ff;
  color: var(--accent2);
}

.tag-yer {
  background: #f0fdf4;
  color: var(--success);
}

.tag-tarih {
  background: #f8fafc;
  color: var(--muted);
  border: 1px solid var(--border);
}

.faaliyet-card[data-kategori="Kurs"] { border-left-color: var(--kurs); }
.faaliyet-card[data-kategori="Kurs"] .tag-kategori { background: #fff7ed; color: var(--kurs); }

.faaliyet-card[data-kategori="Yarışma"] { border-left-color: var(--yarisma); }

.faaliyet-card[data-kategori="Kamp"] { border-left-color: var(--kamp); }
.faaliyet-card[data-kategori="Kamp"] .tag-kategori { background: #ecfeff; color: var(--kamp); }

.faaliyet-card[data-kategori="Seminer"] { border-left-color: var(--seminer); }
.faaliyet-card[data-kategori="Seminer"] .tag-kategori { background: #f5f3ff; color: var(--seminer); }

.faaliyet-card[data-kategori="Faaliyet Programı"] { border-left-color: var(--program); }
.faaliyet-card[data-kategori="Faaliyet Programı"] .tag-kategori { background: #f0fdf4; color: var(--program); }

.faaliyet-card[data-kategori="Sonuçlar"] { border-left-color: var(--sonuc); }
.faaliyet-card[data-kategori="Sonuçlar"] .tag-kategori { background: #f8fafc; color: var(--sonuc); }

.send-box {
  margin: 8px 12px;
  padding: 12px;
  background: var(--card);
  border-radius: 12px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.send-row {
  display: flex;
  gap: 8px;
}

.send-row input {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.82rem;
}

.send-row input:focus {
  outline: none;
  border-color: var(--accent);
}

.send-row button {
  padding: 10px 16px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}

.send-row button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.send-row button:active:not(:disabled) {
  opacity: 0.85;
}

.send-info {
  display: flex;
  justify-content: space-between;
  margin-top: 6px;
  font-size: 0.7rem;
  color: var(--muted);
}

#send-status {
  font-weight: 500;
}

#send-status.success { color: var(--success); }
#send-status.error { color: var(--accent); }

.empty,
.loading {
  text-align: center;
  padding: 40px 20px;
  color: var(--muted);
  font-size: 0.9rem;
}

.update-status {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--success);
  margin-bottom: 4px;
}

.footer {
  text-align: center;
  padding: 16px 20px 24px;
  font-size: 0.7rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  margin-top: 8px;
}

@media (min-width: 768px) {
  .stats {
    max-width: 600px;
    margin: 0 auto;
  }
  .send-box,
  .search-box,
  .controls,
  .list {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }
  .header h1 {
    font-size: 1.4rem;
  }
}