:root {
  --navy: #1b2c3b;
  --navy-2: #24384a;
  --green: #5e8f31;
  --green-dark: #4c7527;
  --orange: #fd6d0d;
  --bg: #f4f8fd;
  --card: #ffffff;
  --text: #1b2c3b;
  --muted: #737f8a;
  --danger: #c0392b;
  --border: #e3e9f0;
  --radius: 14px;
  --shadow: 0 1px 3px rgba(27, 44, 59, .07), 0 4px 14px rgba(27, 44, 59, .04);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.hidden { display: none !important; }
.muted { color: var(--muted); }
.error { color: var(--danger); font-size: 14px; }

/* ---------- giriş ---------- */

.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: linear-gradient(160deg, #14212d 0%, var(--navy) 55%, #274058 100%);
}

.login-card {
  background: var(--card);
  border-radius: 20px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .35);
  padding: 40px 36px;
  width: 100%;
  max-width: 390px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-align: center;
  border-top: 4px solid var(--green);
}

.login-logo { width: 84px; height: 84px; margin: 0 auto; object-fit: contain; }
.login-card h1 { margin: 0; font-size: 24px; letter-spacing: .06em; }
.brand-sub { color: var(--green); font-weight: 700; }
.login-card p { margin: 0 0 10px; font-size: 13px; }
.login-card label { text-align: left; }

/* ---------- üst bar ---------- */

.topbar {
  background: var(--navy);
  color: #fff;
  display: flex;
  align-items: center;
  gap: 26px;
  padding: 0 26px;
  height: 60px;
  position: sticky;
  top: 0;
  z-index: 10;
  flex-wrap: wrap;
  box-shadow: 0 2px 10px rgba(0, 0, 0, .18);
}

.brand {
  font-weight: 600;
  font-size: 16px;
  letter-spacing: .07em;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand b { color: #8fc255; }
.brand-logo { width: 34px; height: 34px; object-fit: contain; background: #fff; border-radius: 8px; padding: 3px; }

#tabs { display: flex; gap: 4px; flex: 1; }

.tab {
  border: none;
  background: none;
  padding: 9px 16px;
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  border-radius: 8px;
  cursor: pointer;
  color: #b9c4ce;
}

.tab:hover { background: rgba(255, 255, 255, .08); color: #fff; }
.tab.active { color: #fff; font-weight: 600; background: var(--green); }

.topbar-right { display: flex; align-items: center; gap: 12px; }
.topbar-right .muted { color: #b9c4ce; font-size: 13px; }

.topbar .btn {
  background: transparent;
  border-color: rgba(255, 255, 255, .3);
  color: #fff;
}

.topbar .btn:hover { background: rgba(255, 255, 255, .1); }

/* ---------- içerik ---------- */

main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 28px 22px 70px;
}

.page-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.page-head h1 { margin: 0; font-size: 23px; font-weight: 700; }

.search {
  padding: 10px 13px;
  border: 1px solid var(--border);
  border-radius: 9px;
  font-size: 14px;
  font-family: inherit;
  min-width: 230px;
  background: #fff;
}

/* kutucuklar */
.count-row { display: flex; gap: 14px; margin-bottom: 24px; flex-wrap: wrap; }

.count-box {
  flex: 1;
  min-width: 150px;
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px 18px;
  text-align: center;
  box-shadow: var(--shadow);
  border-top: 3px solid var(--green);
}

.count-box.accent { border-top-color: var(--orange); }
.count-box .num { font-size: 26px; font-weight: 700; color: var(--navy); }
.count-box .lbl { font-size: 12px; color: var(--muted); margin-top: 4px; font-weight: 500; letter-spacing: .03em; text-transform: uppercase; }

/* kartlar / tablolar */
.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 24px;
}

.card h2 {
  margin: 0;
  padding: 15px 20px;
  font-size: 15px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  color: var(--navy);
}

table { width: 100%; border-collapse: collapse; font-size: 13.5px; }

th, td { text-align: left; padding: 12px 20px; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }
th { color: var(--muted); font-weight: 600; font-size: 11.5px; text-transform: uppercase; letter-spacing: .06em; background: #fafcff; }
td.num, th.num { text-align: right; white-space: nowrap; }

tbody tr.clickable { cursor: pointer; }
tbody tr.clickable:hover { background: #f4f8f0; }

.empty { padding: 30px 20px; color: var(--muted); text-align: center; }

/* butonlar */
.btn {
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  padding: 9px 16px;
  border-radius: 9px;
  font-size: 13.5px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
}

.btn:hover { background: var(--bg); }
.btn.primary { background: var(--green); border-color: var(--green); color: #fff; font-weight: 600; }
.btn.primary:hover { background: var(--green-dark); }
.btn.danger { color: var(--danger); }
.btn.small { padding: 6px 12px; font-size: 12.5px; }
.btn.full { width: 100%; }
.btn-row { display: flex; gap: 8px; flex-wrap: wrap; }

/* form alanları */
label { display: flex; flex-direction: column; gap: 6px; font-size: 13.5px; font-weight: 600; color: var(--navy); }

input, select, textarea {
  font: inherit;
  font-weight: 400;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 9px;
  background: #fff;
  color: var(--text);
}

input:focus, select:focus, textarea:focus { outline: 2px solid var(--green); outline-offset: 0; border-color: transparent; }

/* diyalog */
dialog {
  border: none;
  border-radius: 18px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, .3);
  padding: 0;
  width: min(450px, 92vw);
}

dialog::backdrop { background: rgba(20, 33, 45, .55); }

.dialog-form { display: flex; flex-direction: column; gap: 14px; padding: 26px; border-top: 4px solid var(--green); }
.dialog-form h2 { margin: 0 0 4px; font-size: 18px; color: var(--navy); }
.dialog-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 6px; }

/* firma detayı */
.detail-grid { display: grid; grid-template-columns: 150px 1fr; gap: 10px 18px; padding: 18px 20px; font-size: 14px; }
.detail-grid dt { color: var(--muted); font-weight: 500; }
.detail-grid dd { margin: 0; }

.back-link { color: var(--green-dark); cursor: pointer; background: none; border: none; font-size: 14px; font-weight: 600; font-family: inherit; padding: 0; margin-bottom: 14px; }
.back-link:hover { text-decoration: underline; }

/* toast */
.toast {
  position: fixed;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--navy);
  color: #fff;
  padding: 13px 22px;
  border-radius: 11px;
  font-size: 14px;
  z-index: 100;
  max-width: 90vw;
  box-shadow: 0 8px 24px rgba(0, 0, 0, .25);
}

@media (max-width: 640px) {
  .topbar { height: auto; padding: 10px 14px; gap: 12px; }
  main { padding: 18px 12px 56px; }
  th, td { padding: 10px 10px; }
  .detail-grid { grid-template-columns: 110px 1fr; }
}