/* Light Theme */
:root[data-theme='light'] {
  --bg-color: #f9f9fb;
  --text-color: #111;
  --card-bg: #ffffff;
  --border-color: #ddd;
  --accent-color: #0078ff;
  --accent-hover: #005fcc;
  --success: #16a34a;
  --error: #dc2626;
  --warning: #f59e0b;
}

/* Dark Theme */
:root[data-theme='dark'] {
  --bg-color: #121212;
  --text-color: #f2f2f2;
  --card-bg: #1e1e1e;
  --border-color: #333;
  --accent-color: #2f8cff;
  --accent-hover: #1c6cd8;
  --success: #16a34a;
  --error: #dc2626;
  --warning: #f59e0b;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    margin: 0;
    line-height: 1.5;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    transition: background 0.3s ease, border 0.3s ease;
}

.logo {
    font-size: 1.4rem;
    font-weight: bold;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 24px;
    margin-bottom: 16px;
    transition: background 0.3s ease, border 0.3s ease, box-shadow 0.3s ease;
}

button, .btn-primary {
    background: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 10px 16px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    transition: background 0.2s ease;
}

button:hover, .btn-primary:hover {
    background: var(--accent-hover);
}

button:disabled {
    background: #777;
    cursor: not-allowed;
}

input, select, textarea {
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 12px;
    width: 100%;
    box-sizing: border-box;
    font-size: 1rem;
    max-width: 100%; /* Textarea taşmasını engellemek için */
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent-color) 25%, transparent);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
}

.actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 9px 15px;
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s ease;
    display: inline-block;
    text-align: center;
    font-size: 1rem;
    font-weight: 500;
}

.btn-secondary:hover {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
}