/* Base variables for light theme */
:root {
    --bg-color: #ffffff;
    --text-color: #1a1a1a;
    --nav-bg: #f5f5f5;
    --nav-text: #333333;
    --accent: #0078d4;
    --btn-bg: #0078d4;
    --btn-text: #ffffff;
    --error-color: #c62828;
    --card-bg: #f9f9f9;
    --border-color: #dddddd;
}
/* Dark theme overrides */
[data-theme="dark"] {
    --bg-color: #121212;
    --text-color: #e0e0e0;
    --nav-bg: #1f1f1f;
    --nav-text: #e0e0e0;
    --accent: #00aaff;
    --btn-bg: #00aaff;
    --btn-text: #121212;
    --error-color: #ff6b6b;
    --card-bg: #1e1e1e;
    --border-color: #333333;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
}

header {
    background-color: var(--nav-bg);
    padding: 10px 20px;
    /* subtle shadow for header bar */
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
    /* center navigation within a max width */
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.navbar a {
    color: var(--nav-text);
    text-decoration: none;
    padding: 6px 8px;
    border-radius: 4px;
    transition: background-color 0.3s, color 0.3s;
}

.navbar a:hover {
    background-color: var(--accent);
    color: var(--btn-text);
    border-radius: 4px;
}

.navbar .nav-right {
    margin-left: auto;
}

#themeToggle {
    margin-left: auto;
    background: none;
    border: none;
    font-size: 1.2em;
    cursor: pointer;
    color: var(--nav-text);
    transition: color 0.3s;
}

main {
    flex-grow: 1;
    padding: 40px 20px;
    /* widen main area and center it */
    width: 100%;
    max-width: 1000px;
    margin: 0 auto;
}

footer {
    text-align: center;
    padding: 10px;
    background-color: var(--nav-bg);
    color: var(--nav-text);
    font-size: 0.85em;
}

.hero {
    text-align: center;
    padding: 40px 20px;
    background-color: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
    margin-bottom: 30px;
}

.hero h1 {
    font-size: 2.4em;
    margin-bottom: 10px;
    color: var(--accent);
}

.hero p {
    margin-bottom: 10px;
    font-size: 1.1em;
}

.cta .btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--btn-bg);
    color: var(--btn-text);
    border-radius: 5px;
    text-decoration: none;
    margin-top: 20px;
    font-weight: 600;
    transition: background-color 0.3s;
}

.cta .btn:hover {
    background-color: var(--accent);
}

.form {
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 500px;
}

.form input,
.form select,
.form textarea {
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--card-bg);
    color: var(--text-color);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form input:focus,
.form select:focus,
.form textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.2);
}

.form button {
    background-color: var(--btn-bg);
    color: var(--btn-text);
    border: none;
    padding: 12px;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.3s;
}

.form button:hover {
    background-color: var(--accent);
}

.error {
    color: var(--error-color);
}

.faq-list details {
    background-color: var(--card-bg);
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 8px;
}

.faq-list summary {
    cursor: pointer;
    font-weight: bold;
}

.review-list .review {
    background-color: var(--card-bg);
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 10px;
}

.stars {
    color: var(--accent);
    margin-left: 5px;
}