:root {
    --primary-color: #ff6347; /* Tomato */
    --background-color: #fdfcfa; /* Off-white */
    --text-color: #333333;
    --card-background: #ffffff;
    --card-text: #333333;
    --card-description: #666666;
    --card-border: #cccccc;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --background-color: #1a1a1a;
    --text-color: #fdfcfa;
    --card-background: #2d2d2d;
    --card-text: #ffffff;
    --card-description: #aaaaaa;
    --card-border: #444444;
    --shadow-color: rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    margin: 0;
    padding: 20px;
    text-align: center;
    transition: background-color 0.3s ease, color 0.3s ease;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 900px;
    margin: 0 auto 40px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

h1 {
    color: var(--primary-color);
    font-size: 2.5em;
    font-weight: 700;
    margin: 0;
}

.muted {
    color: var(--card-description);
    font-size: 0.95em;
}

.small {
    font-size: 0.9em;
}

.hidden {
    display: none !important;
}

#theme-toggle {
    background: none;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: bold;
    transition: all 0.2s ease;
}

#theme-toggle:hover {
    background-color: var(--primary-color);
    color: white;
}

main {
    max-width: 900px;
    margin: 0 auto;
}

#auth-section {
    max-width: 420px;
    margin: 0 auto 50px;
    padding: 24px;
    background-color: var(--card-background);
    border-radius: 14px;
    box-shadow: 0 4px 15px var(--shadow-color);
    text-align: left;
}

#auth-section h2 {
    margin-top: 0;
    color: var(--primary-color);
}

#login-button,
#logout-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 10px 22px;
    font-size: 1em;
    font-weight: bold;
    border-radius: 20px;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#logout-button {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

#login-button:hover,
#logout-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 18px var(--shadow-color);
}

.error {
    color: #c0392b;
    margin: 10px 0 0;
}

#menu-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

#recommend-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 1.2em;
    font-weight: bold;
    border-radius: 50px;
    cursor: pointer;
    box-shadow: 0 5px 15px var(--shadow-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

#recommend-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px var(--shadow-color);
}

#contact-section {
    max-width: 600px;
    margin: 60px auto;
    padding: 30px;
    background-color: var(--card-background);
    border-radius: 15px;
    box-shadow: 0 4px 15px var(--shadow-color);
}

#contact-section h2 {
    color: var(--primary-color);
    margin-bottom: 25px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--card-border);
    border-radius: 8px;
    background-color: var(--background-color);
    color: var(--text-color);
    box-sizing: border-box;
}

.form-group textarea {
    height: 120px;
    resize: vertical;
}

#submit-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 30px;
    font-size: 1.1em;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    width: 100%;
    transition: background-color 0.2s;
}

#submit-button:hover {
    filter: brightness(1.1);
}