:root {
    --primary-color: #3498db;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --text-color: #333;
    --bg-color: #f4f6f9;
    --white: #ffffff;
    --border-color: #ddd;
    --sidebar-width: 250px;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
}

a {
    text-decoration: none;
    color: var(--primary-color);
}

ul {
    list-style: none;
    padding: 0;
}

/* Layout */
.container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background-color: var(--secondary-color);
    color: var(--white);
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.brand {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.avatar {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
}

.nav-links li {
    margin-bottom: 10px;
}

.nav-links a {
    color: #bdc3c7;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    border-radius: 5px;
    transition: background 0.3s;
}

.nav-links a:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.logout {
    margin-top: auto;
}

.logout a {
    color: #e74c3c;
    display: flex;
    align-items: center;
    gap: 10px;
}

.content {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.full-width {
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--secondary-color);
}

/* Cards */
.card {
    background: var(--white);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    border: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn-secondary {
    background-color: #95a5a6;
    color: var(--white);
}

.btn-outline {
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

/* Login */
.login-container {
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-box {
    background: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    width: 350px;
    text-align: center;
}

.form-group {
    margin-bottom: 15px;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    font-size: 0.9rem;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-sizing: border-box;
}

.error-message {
    color: var(--accent-color);
    margin-bottom: 15px;
    font-size: 0.9rem;
}

/* Dashboard */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 20px;
}

.card-icon {
    font-size: 2rem;
    opacity: 0.8;
}

.stat-card.red { border-left: 4px solid var(--accent-color); color: var(--accent-color); }
.stat-card.blue { border-left: 4px solid var(--primary-color); color: var(--primary-color); }
.stat-card.green { border-left: 4px solid var(--success-color); color: var(--success-color); }
.stat-card.gray { border-left: 4px solid #7f8c8d; color: #7f8c8d; }

.stat-number {
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: #f8f9fa;
    font-weight: 600;
}

/* Badges */
.badge {
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: bold;
}

.badge.critical { background-color: #fadbd8; color: #c0392b; }
.badge.high { background-color: #fdebd0; color: #d35400; }
.badge.medium { background-color: #d6eaf8; color: #2980b9; }
.badge.low { background-color: #d5f5e3; color: #27ae60; }

.status {
    font-weight: bold;
    font-size: 0.9rem;
}
.status.open { color: #2980b9; }
.status.in-progress { color: #f39c12; }
.status.resolved { color: #27ae60; }
.status.closed { color: #7f8c8d; }

/* Bug Detail */
.bug-detail-container .header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
}

.comments-list {
    margin-bottom: 20px;
}

.comment {
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
}

.comment-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 5px;
    font-size: 0.85rem;
    color: #7f8c8d;
}

.comment-header .user {
    font-weight: bold;
    color: var(--secondary-color);
}

.comment-form textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 10px;
    min-height: 80px;
}

/* Submit Bug */
.submit-form {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    max-width: 600px;
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.system-message {
    background-color: #f8f9fa;
    border-left: 3px solid #f39c12;
    padding-left: 10px;
    font-style: italic;
    font-size: 0.9rem;
}