:root {
    --primary-color: #0056b3;
    --secondary-color: #004494;
    --text-color: #333;
    --bg-color: #f4f7f6;
    --white: #ffffff;
    --error-bg: #ffe6e6;
    --error-text: #cc0000;
    --border-color: #ddd;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

/* Header */
header {
    background-color: var(--white);
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    padding: 1rem 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.logo span {
    color: #555;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

nav a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
}

.btn-admin {
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
    padding: 5px 15px;
    border-radius: 4px;
    transition: all 0.3s;
}

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

/* Hero */
.hero {
    background: linear-gradient(135deg, #0056b3 0%, #00c6ff 100%);
    color: var(--white);
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero .container {
    flex-direction: column;
}

.btn-primary {
    display: inline-block;
    background-color: var(--white);
    color: var(--primary-color);
    padding: 10px 25px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    margin-top: 20px;
}

/* Features */
.features {
    padding: 4rem 20px;
    display: flex;
    gap: 30px;
    justify-content: center;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    text-align: center;
    flex: 1;
}

.feature-card .icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

/* Footer */
footer {
    background-color: #333;
    color: #aaa;
    padding: 2rem 0;
    text-align: center;
    margin-top: auto;
}

footer .container {
    justify-content: center;
}

/* Error Page */
.error-page {
    background-color: var(--error-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.error-container {
    background: var(--white);
    padding: 3rem;
    border-radius: 8px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    max-width: 800px;
    width: 100%;
    border-top: 5px solid var(--error-text);
}

.error-header {
    text-align: center;
    margin-bottom: 2rem;
}

.error-header h1 {
    font-size: 4rem;
    color: var(--error-text);
    line-height: 1;
}

.error-header h2 {
    color: #555;
}

.debug-info {
    background-color: #f8f9fa;
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 4px;
    margin-top: 2rem;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    overflow-x: auto;
}

.debug-info h3 {
    color: var(--error-text);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

.debug-info h4 {
    margin-top: 1rem;
    margin-bottom: 0.5rem;
    color: #444;
}

.debug-info ul {
    list-style: none;
    padding-left: 10px;
}

.debug-info li {
    margin-bottom: 5px;
    word-break: break-all;
}