:root {
    --primary-color: #0366d6;
    --secondary-color: #6a737d;
    --success-color: #2ea44f;
    --error-color: #d73a49;
    --bg-color: #f6f8fa;
    --card-bg: #ffffff;
    --text-main: #24292e;
    --text-muted: #586069;
    --border-color: #e1e4e8;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.05);
    --radius-md: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-main);
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem 2rem;
    background-color: var(--bg-color);
    font-size: 16px;
}

header {
    background-color: var(--card-bg);
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
    padding: 0.5rem 2rem;
    margin-left: -2rem;
    margin-right: -2rem;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main);
    text-decoration: none;
}

.nav-links {
    display: flex;
    align-items: center;
}

.nav-links a {
    margin-left: 1.5rem;
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links a.user-link {
    font-weight: 600;
    color: var(--text-main);
}

.nav-links a.logout-link {
    color: var(--error-color);
}

.nav-links a.logout-link:hover {
    color: #cb2431;
}

.nav-links a.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 2px;
}

h1 {
    color: var(--text-main);
    margin-bottom: 0.25rem;
    font-size: 2rem;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-top: 0;
    margin-bottom: 1.5rem;
}

.page-header {
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.summary-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
}

.summary-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.summary-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 1rem;
    background-color: var(--card-bg);
    box-shadow: var(--shadow-sm);
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    table-layout: auto;
}

th, td {
    text-align: left;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    word-break: break-all;
}

th {
    background-color: #fcfcfc;
    font-weight: 600;
    color: var(--text-main);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
    border-bottom: 2px solid var(--border-color);
}

tr:last-child td {
    border-bottom: none;
}

tr:nth-child(even) {
    background-color: #fafbfc;
}

tr:hover {
    background-color: #f1f8ff;
}

.table-container {
    overflow-x: auto;
    margin-bottom: 2rem;
    border-radius: var(--radius-md);
}

.vertical-table {
    table-layout: auto;
}

.vertical-table th {
    width: 200px;
    background-color: #fcfcfc;
    border-right: 1px solid var(--border-color);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

.vertical-table td {
    padding: 1.25rem;
}

.important-value {
    font-weight: 600;
    color: var(--primary-color);
}

.text-right {
    text-align: right;
}

form {
    background-color: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-main);
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1.25rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 1rem;
    background-color: #fff;
}

input[type="text"]:focus,
input[type="password"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(3, 102, 214, 0.1);
}

button {
    background-color: var(--success-color);
    color: #fff;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover {
    background-color: #2c974b;
}

.hero {
    padding: 3rem 2rem;
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

.cta-buttons {
    margin-top: 1.5rem;
}

.button-link {
    display: inline-block;
    background-color: var(--primary-color);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    margin-right: 0.5rem;
    font-weight: 600;
    transition: background-color 0.2s;
}

.button-link:hover {
    background-color: #0255b3;
    text-decoration: none;
}

.button-link.secondary {
    background-color: var(--secondary-color);
}

.button-link.secondary:hover {
    background-color: #586069;
}

.empty-state {
    padding: 3rem;
    text-align: center;
    background-color: var(--card-bg);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    margin: 1rem 0;
}