/* Modern arayüz – British Racing Green tema */
:root {
  --color-primary: #006B3C;
  --color-primary-hover: #005a30;
  --color-primary-focus: rgba(0, 107, 60, 0.2);
  --color-bg: #f0f5f0;
  --color-bg-gradient-end: #e0eae0;
  --color-surface: #ffffff;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #d4e0d4;
  --color-success: #16a34a;
  --color-success-bg: rgba(22, 163, 74, 0.08);
  --color-error: #dc2626;
  --color-error-bg: rgba(220, 38, 38, 0.08);
  --color-header-bg: #004225;
  --color-header-text: #f0f5f0;
  --color-header-hover: rgba(255, 255, 255, 0.1);
  --color-danger: #dc2626;
  --color-danger-hover: rgba(220, 38, 38, 0.15);
  --color-table-header: #f4f8f4;
  --color-table-row-alt: #f8faf8;
  --color-table-row-hover: #eef4ee;
  --color-input-readonly: #f4f8f4;
  --color-btn-secondary: #2d5a3d;
  --color-btn-secondary-hover: #1e4629;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --transition: 0.2s ease;
}

* { box-sizing: border-box; }

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  margin: 0;
  padding: 0;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

/* Main – kart hissi */
.main {
  max-width: 900px;
  margin: 1.5rem auto;
  padding: 2rem;
  background: var(--color-surface);
  min-height: 60vh;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* Header */
.header {
  background: var(--color-header-bg);
  color: var(--color-header-text);
  padding: 0.875rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  box-shadow: var(--shadow-sm);
}

.brand {
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.header nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.header nav a {
  color: var(--color-header-text);
  text-decoration: none;
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition), opacity var(--transition);
}

.header nav a:hover {
  background: var(--color-header-hover);
  opacity: 1;
}

.header nav a:focus-visible {
  outline: 2px solid var(--color-header-text);
  outline-offset: 2px;
}

.nav-form { margin: 0; display: inline; }

.btn-link {
  background: none;
  border: none;
  color: var(--color-header-text);
  cursor: pointer;
  font-size: 1rem;
  padding: 0.35rem 0.6rem;
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: background var(--transition), opacity var(--transition);
}

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

.btn-link:focus-visible {
  outline: 2px solid var(--color-header-text);
  outline-offset: 2px;
}

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

.inline-form { display: inline; margin: 0; }

.user { opacity: 0.9; font-size: 0.9rem; }

/* Başlıklar */
h1 { margin: 0 0 0.25rem; font-size: 1.5rem; font-weight: 700; }
h2 { margin: 0 0 1rem; font-size: 1.25rem; font-weight: 600; }
h3 { margin: 1.25rem 0 0.5rem; font-size: 1.1rem; font-weight: 600; }

/* Formlar ve inputlar */
.form label {
  display: block;
  margin-top: 0.75rem;
  margin-bottom: 0.25rem;
  font-weight: 500;
}

.form input[type="text"],
.form input[type="number"],
.form input[type="password"] {
  width: 100%;
  max-width: 320px;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-focus);
}

.form input:focus-visible {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-focus);
}

.form input.readonly { background: var(--color-input-readonly); }

.form-inline { display: flex; align-items: flex-end; gap: 0.75rem; flex-wrap: wrap; }
.form-inline label { margin-top: 0; }
.form-inline input { width: 100px; }

/* Butonlar */
.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

a.btn { color: inherit; }

.btn:hover { transform: translateY(-1px); }

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--color-btn-secondary);
  color: #fff;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--color-btn-secondary-hover);
  box-shadow: var(--shadow-md);
}

/* Mesajlar ve yardımcılar */
.hint {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin: 0.25rem 0 0;
}

.error {
  color: var(--color-error);
  margin: 0.5rem 0;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--color-error-bg);
}

.success {
  color: var(--color-success);
  margin: 0.5rem 0;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  background: var(--color-success-bg);
}

.checkbox-label { display: flex; align-items: center; gap: 0.5rem; margin-top: 0.75rem; cursor: pointer; }

/* Sonuç alanı ve tablolar */
.result-area { margin-top: 1.5rem; }
.result-info { font-weight: 500; margin-bottom: 0.5rem; }
.result-actions { margin-bottom: 0.75rem; }

.table-wrap {
  overflow-x: auto;
  max-height: 400px;
  overflow-y: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.result-table {
  width: 100%;
  border-collapse: collapse;
}

.result-table th,
.result-table td {
  border: 1px solid var(--color-border);
  padding: 0.6rem 0.75rem;
  text-align: left;
}

.result-table th {
  background: var(--color-table-header);
  position: sticky;
  top: 0;
  font-weight: 600;
  font-size: 0.9rem;
}

.result-table tbody tr:nth-child(even) { background: var(--color-table-row-alt); }

.result-table tbody tr {
  transition: background var(--transition);
}

.result-table tbody tr:hover { background: var(--color-table-row-hover); }

/* Login sayfası */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-gradient-end) 100%);
}

.login-box {
  background: var(--color-surface);
  padding: 2.25rem;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  max-width: 360px;
  width: 100%;
}

.login-box .login-desc {
  color: var(--color-text-muted);
  margin: 0 0 1rem;
  font-size: 0.9rem;
}

.login-box .form { margin-top: 1rem; }
.login-box .btn { margin-top: 1rem; width: 100%; }

/* Responsive */
@media (max-width: 640px) {
  .main {
    margin: 0.75rem;
    padding: 1.25rem;
    border-radius: var(--radius-md);
  }

  .header {
    padding: 0.75rem 1rem;
  }

  .result-table th,
  .result-table td {
    padding: 0.5rem 0.6rem;
    font-size: 0.9rem;
  }

  .form input[type="text"],
  .form input[type="number"],
  .form input[type="password"] {
    max-width: 100%;
  }
}