/* Global Styles */
:root {
    --primary-color: #0066cc;
    --primary-hover: #0052a3;
    --text-color: #333;
    --text-light: #666;
    --bg-color: #ffffff;
    --white: #ffffff;
    --border-color: #ddd;
    --success-bg: #d4edda;
    --success-text: #155724;
    --success-border: #c3e6cb;
    --error-bg: #f8d7da;
    --error-text: #721c24;
    --error-border: #f5c6cb;
    --header-bg: #000000;
    --header-text: #fff;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
    color: var(--text-color);
}

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

a:hover {
    text-decoration: underline;
}

/* Buttons */
button {
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
    font-family: inherit;
}

button:hover {
    background: var(--primary-hover);
}

button:active {
    transform: scale(0.98);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Form Elements */
input[type="text"],
input[type="url"],
input[type="email"],
textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

label .required {
    color: #d32f2f;
}

.help-text {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 0.25rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

/* Container */
.container {
    background: var(--white);
    border-radius: 8px;
    padding: 2rem;
    max-width: 600px;
    width: 100%;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Messages */
.message {
    padding: 1rem;
    border-radius: 4px;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.message.success {
    background: var(--success-bg);
    color: var(--success-text);
    border: 1px solid var(--success-border);
}

.message.error {
    background: var(--error-bg);
    color: var(--error-text);
    border: 1px solid var(--error-border);
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--header-bg);
    color: var(--header-text);
}

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

header a:hover {
    text-decoration: underline;
}

/* Links Container */
.links {
    margin-top: 1.5rem;
    text-align: center;
}

.links a {
    color: var(--primary-color);
    text-decoration: none;
    margin: 0 0.5rem;
}

.links a:hover {
    text-decoration: underline;
}

/* Typography */
h1 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    text-align: center;
    color: var(--text-color);
}

/* Iframe */
iframe {
    border: none;
}