/* ============================================================
   Teknofest Envanter — Modern UI Tasarımı
   Backend (Express + SQLite) değiştirilmemiştir.
   Sadece frontend arayüzü modernize edilmiştir.
   ============================================================ */

/* ---------- Renk paleti & değişkenler ---------- */
:root {
  --brand: #10b981;
  --brand-hover: #059669;
  --brand-glow: rgba(16, 185, 129, 0.25);
  --brand-light: rgba(16, 185, 129, 0.12);

  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --primary-light: rgba(59, 130, 246, 0.12);

  --danger: #ef4444;
  --danger-light: rgba(239, 68, 68, 0.12);

  --warn: #f59e0b;
  --warn-light: rgba(245, 158, 11, 0.12);

  --success: #10b981;
  --success-light: rgba(16, 185, 129, 0.12);

  --bg: #0f172a;
  --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e293b 45%, #334155 100%);
  --surface: rgba(30, 41, 59, 0.55);
  --surface-hover: rgba(30, 41, 59, 0.75);
  --border: rgba(148, 163, 184, 0.18);
  --border-hover: rgba(148, 163, 184, 0.35);

  --text: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 20px 50px -15px rgba(0, 0, 0, 0.6);
  --transition: 0.25s ease;

  --sidebar-width: 260px;
  --sidebar-collapsed: 72px;
}

/* ---------- Sıfırlama ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg-gradient);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; background: none; border: none; }
input, select, textarea { font-family: inherit; }
.hidden { display: none !important; }
.num { text-align: right; }
.muted { color: var(--text-muted); font-size: 0.85rem; }

/* ---------- Auth ekranı ---------- */
.auth-screen {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background: var(--bg-gradient);
}
.auth-wrap { width: 100%; max-width: 430px; }
.auth-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 40px 32px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-lg);
}
.auth-header { text-align: center; margin-bottom: 26px; }
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
}
.brand i { color: var(--brand); }
.brand b { color: var(--brand); }
.auth-sub { color: var(--text-muted); font-size: 0.9rem; margin-top: 8px; }

.auth-tabs {
  display: flex;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 4px;
  margin-bottom: 24px;
}
.auth-tab {
  flex: 1;
  padding: 10px;
  border-radius: 9px;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition);
}
.auth-tab.active {
  background: var(--brand);
  color: #022c22;
  font-weight: 600;
  box-shadow: 0 0 0 0 var(--brand-glow);
}

.auth-form { display: flex; flex-direction: column; gap: 14px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}
input:not([type="checkbox"]), select, textarea {
  width: 100%;
  background: rgba(15, 23, 42, 0.5);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 11px 14px;
  border-radius: 10px;
  font-size: 0.9rem;
  outline: none;
  transition: var(--transition);
}
select option {
  background: #0f172a;
  color: var(--text);
}
input::placeholder, textarea::placeholder { color: var(--text-dim); }
input:not([type="checkbox"]):focus, select:focus, textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--brand-light);
  background: rgba(15, 23, 42, 0.7);
}
.check {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.88rem;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
}
.check input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--brand);
  cursor: pointer;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 18px;
  border-radius: 10px;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
  cursor: pointer;
}
.btn.primary {
  background: var(--brand);
  color: #022c22;
}
.btn.primary:hover {
  background: var(--brand-hover);
  box-shadow: 0 0 20px var(--brand-glow);
}
.btn.ghost {
  background: rgba(148, 163, 184, 0.12);
  color: var(--text);
  border-color: var(--border);
}
.btn.ghost:hover { background: rgba(148, 163, 184, 0.22); }
.btn.green {
  background: var(--success-light);
  color: #6ee7b7;
  border-color: rgba(16, 185, 129, 0.3);
}
.btn.green:hover:not(:disabled) {
  background: rgba(16, 185, 129, 0.25);
  border-color: var(--brand);
}
.btn.red {
  background: var(--danger-light);
  color: #fca5a5;
  border-color: rgba(239, 68, 68, 0.3);
}
.btn.red:hover:not(:disabled) {
  background: rgba(239, 68, 68, 0.25);
  border-color: var(--danger);
}
.btn.amber {
  background: var(--warn-light);
  color: #fcd34d;
  border-color: rgba(245, 158, 11, 0.3);
}
.btn.amber:hover:not(:disabled) {
  background: rgba(245, 158, 11, 0.25);
  border-color: var(--warn);
}
.btn.blue {
  background: var(--primary-light);
  color: #93c5fd;
  border-color: rgba(59, 130, 246, 0.3);
}
.btn.blue:hover:not(:disabled) {
  background: rgba(59, 130, 246, 0.25);
  border-color: var(--primary);
}
.btn.block { width: 100%; }
.btn.sm { padding: 7px 12px; font-size: 0.8rem; font-weight: 500; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.icon-btn {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  color: var(--text-muted);
  background: rgba(148, 163, 184, 0.1);
  transition: var(--transition);
}
.icon-btn:hover { color: var(--text); background: rgba(148, 163, 184, 0.2); }

.auth-error {
  margin-top: 10px;
  padding: 10px 14px;
  border-radius: 10px;
  background: var(--danger-light);
  color: #fca5a5;
  font-size: 0.85rem;
  border: 1px solid var(--border);
}
.auth-footer {
  margin-top: 22px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.auth-footer .link {
  color: var(--brand);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  cursor: pointer;
}
.auth-footer .link:hover { color: var(--brand-hover); }

/* ---------- App kabuğu ---------- */
.app-shell {
  display: flex;
  height: 100vh;
  max-height: 100vh;
  overflow: hidden;
}

/* Kenar çubuğu */
.sidebar {
  width: var(--sidebar-width);
  background: var(--surface);
  border-right: 1px solid var(--border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  z-index: 40;
  transition: transform 0.3s ease;
}
.sidebar-brand {
  padding: 22px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}
.sidebar-brand i { color: var(--brand); font-size: 1.4rem; }
.sidebar-brand span { font-size: 1.25rem; font-weight: 700; color: var(--text); }
.sidebar-brand b { color: var(--brand); }

.sidebar-nav {
  flex: 1;
  padding: 16px 8px;
  overflow-y: auto;
}
.nav-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 18px;
  border-radius: 11px;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: left;
  transition: var(--transition);
  border: 1px solid transparent;
  margin: 0 8px 6px;
}
.nav-item i { width: 20px; text-align: center; font-size: 1.1rem; }
.nav-item:hover {
  background: var(--surface-hover);
  color: var(--text);
  border-color: var(--border-hover);
}
.nav-item.active {
  background: var(--brand-light);
  color: var(--brand);
  border-color: rgba(16, 185, 129, 0.4);
  box-shadow: 0 0 0 0 var(--brand-glow);
}
.nav-item.active i { color: var(--brand); }
.nav-badge {
  margin-left: auto;
  background: var(--danger);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 999px;
}
.nav-item.logout { margin-top: auto; color: var(--text-muted); border-color: transparent; }
.nav-item.logout:hover { background: var(--danger-light); color: var(--danger); border-color: var(--border); }

.sidebar-footer {
  padding: 18px 20px;
  border-top: 1px solid var(--border);
}
.user-info { display: flex; gap: 12px; align-items: center; }
.user-avatar {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), var(--primary));
  display: grid; place-items: center;
  font-weight: 700; font-size: 1rem; color: #022c22;
}
.user-meta { overflow: hidden; }
.user-name {
  font-size: 0.88rem; font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.user-role {
  font-size: 0.72rem; font-weight: 500; color: var(--brand); margin-top: 2px;
}

/* Overlay (mobile) */
.sidebar-overlay {
  position: fixed; inset: 0; background: rgba(2, 6, 23, 0.45);
  backdrop-filter: blur(4px); z-index: 35; transition: opacity 0.3s ease;
}

/* Gövde (sağ taraf) */
.app-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
}

/* Üst çubuk */
.topbar {
  height: 64px;
  border-bottom: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 26px;
  z-index: 30;
  flex-shrink: 0;
}
#mobileMenuBtn { display: none; }
.topbar-title h1 {
  font-size: 1.15rem; font-weight: 700; color: var(--text); letter-spacing: -0.01em;
}
.topbar-title p { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }
.topbar-actions { display: flex; align-items: center; gap: 12px; }
#topLogoutBtn { display: none; }

/* İçerik alanı */
.content {
  flex: 1;
  padding: 28px 32px 40px;
  overflow-y: auto;
}

/* Görünümler */
.view { display: none; animation: fadeIn 0.35s ease; }
.view.active { display: block; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}
.view-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}
.view-title { font-size: 1.35rem; font-weight: 700; color: var(--text); margin-bottom: 4px; letter-spacing: -0.01em; }
.view-sub { font-size: 0.85rem; color: var(--text-muted); }

/* Stats grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 16px;
  margin-bottom: 26px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 22px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: var(--transition);
}
.stat-card:hover { border-color: var(--border-hover); transform: translateY(-2px); }
.stat-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: grid; place-items: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}
.stat-icon.blue, .stat-icon.primary { background: var(--primary-light); color: var(--primary); }
.stat-icon.green { background: var(--success-light); color: var(--brand); }
.stat-icon.amber { background: var(--warn-light); color: var(--warn); }
.stat-icon.red { background: var(--danger-light); color: var(--danger); }
.stat-info .v { font-size: 1.6rem; font-weight: 700; color: var(--text); line-height: 1.1; }
.stat-info .l { font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }

/* Toolbar */
.toolbar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 18px;
}
.toolbar select {
  width: auto;
  min-width: 180px;
}
.search {
  position: relative;
  flex: 1;
  min-width: 220px;
}
.search i {
  position: absolute; left: 14px; top: 50%; transform: translateY(-50%);
  color: var(--text-muted); font-size: 0.95rem;
}
.search input { padding-left: 40px; }

/* Kartlar */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: var(--transition);
  margin-bottom: 16px;
}
.card:hover { border-color: var(--border-hover); }
.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.3);
}
.card-title { font-size: 1rem; font-weight: 700; color: var(--text); letter-spacing: -0.01em; }

/* Tablolar */
.table-wrap { overflow-x: auto; margin-bottom: 10px; }
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}
.data-table th {
  text-align: left;
  color: var(--text-dim);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.25);
}
.data-table td {
  padding: 14px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.08);
  vertical-align: middle;
  color: var(--text);
}
.data-table tr {
  transition: var(--transition);
}
.data-table tr:hover td {
  background: var(--surface-hover);
}
.actions-col { width: 140px; text-align: right; }
.actions { display: flex; gap: 8px; justify-content: flex-end; flex-wrap: wrap; }

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

/* Durum etiketleri (pill) */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}
.pill.ok, .pill.admin { background: var(--success-light); color: #6ee7b7; }
.pill.partial { background: var(--primary-light); color: #93c5fd; }
.pill.out, .pill.member { background: rgba(148,163,184,0.12); color: #cbd5e1; }
.pill.late { background: var(--danger-light); color: #fca5a5; }
.pill.soon { background: var(--warn-light); color: #fcd34d; }
.pill.pending { background: var(--primary-light); color: #93c5fd; }

.modal-hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 4px 0;
}

tr.overdue td { background: rgba(239, 68, 68, 0.06); }

/* Modal */
.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(2, 6, 23, 0.65);
  backdrop-filter: blur(8px);
  display: grid; place-items: center;
  z-index: 60; padding: 24px;
  animation: fadeIn 0.25s ease;
}
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  background: rgba(15, 23, 42, 0.3);
}
.modal-head h3 {
  font-size: 1.1rem; font-weight: 700; color: var(--text); letter-spacing: -0.01em;
}
.modal form { padding: 22px 24px; display: flex; flex-direction: column; gap: 14px; overflow-y: auto; max-height: 70vh; }
.modal .field { gap: 6px; }
.modal label { font-size: 0.8rem; font-weight: 500; color: var(--text-muted); letter-spacing: 0.02em; }
.modal .row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.modal .form-actions {
  display: flex; justify-content: flex-end; gap: 10px;
  padding-top: 8px; border-top: 1px solid var(--border);
}
.modal .hint {
  font-size: 0.78rem; color: var(--text-muted); margin-top: 6px;
  display: flex; align-items: center; gap: 6px;
}
.icon-btn.danger:hover { color: var(--danger); background: var(--danger-light); }

/* Toast */
.toast {
  position: fixed; bottom: 26px; right: 26px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 4px solid var(--brand);
  border-radius: 12px;
  padding: 12px 16px;
  z-index: 100;
  max-width: 400px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px;
  box-shadow: var(--shadow-lg);
  animation: slideUp 0.35s ease;
}
.toast.error { border-left-color: var(--danger); }
#toastMsg { font-size: 0.88rem; color: var(--text); }
#toastClose { width: 24px; height: 24px; color: var(--text-muted); font-size: 0.75rem; }
#toastClose:hover { color: var(--text); }
@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 900px) {
  .sidebar {
    position: fixed;
    left: 0; top: 0; bottom: 0;
    transform: translateX(-100%);
    z-index: 50;
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay { display: block; }
  .sidebar-overlay.hidden { display: none; }
  #mobileMenuBtn { display: block; }
  .topbar-actions { gap: 8px; }
  #topLogoutBtn { display: none; }
  .content { padding: 20px 18px 40px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .modal { max-width: 92vw; margin: 20px; }
  .nav-item span { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
}
@media (max-width: 600px) {
  .stats-grid { grid-template-columns: 1fr; }
  .auth-card { padding: 30px 22px; }
  .content { padding: 16px 14px 40px; }
}

/* Scrollbar ince ayarlama */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.2);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(148, 163, 184, 0.4); }