:root {
    --primary: #1e3a8a;
    --primary-hover: #1e40af;
    --accent: #3b82f6;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --border-color: #d1d5db;
    --error: #dc2626;
    --success: #16a34a;
    --radius: 8px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
    padding: 20px;
}

.container {
    max-width: 600px;
    margin: 40px auto;
    background: var(--card-bg);
    padding: 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

header {
    text-align: center;
    margin-bottom: 24px;
}

header h1 {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 8px;
}

header p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    font-weight: 600;
    margin-bottom: 6px;
    font-size: 0.9rem;
}

input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    color: var(--text-main);
    background-color: #fff;
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

button[type="submit"] {
    display: block;
    width: 100%;
    background-color: var(--primary);
    color: white;
    font-weight: 600;
    padding: 12px;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
    margin-top: 24px;
}

button[type="submit"]:hover {
    background-color: var(--primary-hover);
}

.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.alert-error {
    background-color: #fee2e2;
    color: var(--error);
    border: 1px solid #fecaca;
}

.alert-success {
    background-color: #dcfce7;
    color: var(--success);
    border: 1px solid #bbf7d0;
}

@media (max-width: 640px) {
    .container {
        margin: 10px;
        padding: 20px;
    }
}