:root {
  --accent: #F4653D;
  --accent-light: #FDE8E1;
  --ink: #1A1D29;
  --ink-soft: #6B7280;
  --bg: #F7F7F5;
  --card: #FFFFFF;
  --border: #E8E8E5;
  --radius: 14px;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
}
.hidden { display: none !important; }

/* Login */
.login-screen {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
}
.login-box {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  width: 320px;
  text-align: center;
}
.login-box h1 {
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  margin: 0 0 24px;
}
.login-box h1 span { color: var(--ink); font-weight: 400; }
.login-box input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 12px;
}
.error-text { color: #D14343; font-size: 13px; min-height: 18px; margin: 8px 0 0; }

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 32px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
.logo { font-weight: 700; color: var(--accent); font-size: 18px; letter-spacing: 0.5px; }
.logo span { color: var(--ink); font-weight: 400; }

.main { max-width: 1200px; margin: 0 auto; padding: 24px 32px 60px; }

/* Buttons */
button { cursor: pointer; font-family: inherit; }
.btn-primary {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 10px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
}
.btn-primary:hover { opacity: 0.9; }
.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--ink);
}
.btn-ghost:hover { background: var(--bg); }
.btn-danger {
  background: transparent;
  border: 1px solid #F0C9C9;
  color: #D14343;
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 14px;
}

/* Stats */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}
.stat-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}
.stat-card .num { font-size: 28px; font-weight: 700; color: var(--accent); }
.stat-card .label { font-size: 13px; color: var(--ink-soft); margin-top: 4px; }

/* Reminders */
.reminders { margin-bottom: 20px; }
.reminder-item {
  background: var(--accent-light);
  border-radius: 10px;
  padding: 10px 16px;
  font-size: 13px;
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
}
.reminder-item b { color: var(--accent); }

/* Toolbar */
.toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  flex-wrap: wrap;
  gap: 12px;
}
.tabs { display: flex; gap: 6px; }
.tab {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 8px 16px;
  font-size: 13px;
  color: var(--ink-soft);
}
.tab.active { background: var(--accent); color: white; border-color: var(--accent); }
.toolbar-right { display: flex; gap: 10px; }
#search {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  width: 200px;
}

/* Customer grid */
.customer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 14px;
}
.customer-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  cursor: pointer;
  transition: border-color 0.15s;
}
.customer-card:hover { border-color: var(--accent); }
.customer-card .name { font-weight: 700; font-size: 15px; }
.customer-card .company { font-size: 13px; color: var(--ink-soft); margin-bottom: 10px; }
.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 12px;
  margin-bottom: 10px;
}
.badge-teklif { background: #FDE8E1; color: #C24A28; }
.badge-devam { background: #E1EEFD; color: #2861B0; }
.badge-tamamlandi { background: #E1FBEA; color: #1D8A45; }
.badge-destek { background: #F3E1FD; color: #7A28B0; }
.customer-card .meta { font-size: 12px; color: var(--ink-soft); }
.empty-state { text-align: center; padding: 60px 20px; color: var(--ink-soft); }

/* Modal */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(26,29,41,0.4);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  padding: 20px;
}
.modal {
  background: var(--card);
  border-radius: var(--radius);
  width: 100%; max-width: 560px;
  max-height: 90vh;
  overflow-y: auto;
}
.modal-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
}
.modal-header h2 { margin: 0; font-size: 17px; }
.modal-body { padding: 20px 24px; }
.form-row { display: flex; gap: 12px; margin-bottom: 12px; }
.form-field { flex: 1; }
.form-field.full { margin-bottom: 12px; }
.form-field label { display: block; font-size: 12px; color: var(--ink-soft); margin-bottom: 5px; }
.form-field input, .form-field select, .form-field textarea {
  width: 100%;
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
}
.log-section { margin-top: 16px; border-top: 1px solid var(--border); padding-top: 14px; }
.log-section label { font-size: 12px; color: var(--ink-soft); }
.log-list { max-height: 140px; overflow-y: auto; margin: 10px 0; }
.log-entry { font-size: 13px; padding: 6px 0; border-bottom: 1px solid var(--border); }
.log-entry .date { color: var(--ink-soft); font-size: 11px; }
.log-add { display: flex; gap: 8px; margin-top: 8px; }
.log-add input { flex: 1; padding: 8px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 13px; }
.modal-footer {
  display: flex; align-items: center; gap: 10px;
  padding: 16px 24px;
  border-top: 1px solid var(--border);
}
.spacer { flex: 1; }

@media (max-width: 640px) {
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .form-row { flex-direction: column; gap: 12px; }
  .main { padding: 16px; }
}