:root {
    --bg-gradient: linear-gradient(45deg, #f8a5c2, #b3e5fc);
    --container-bg: rgba(255, 255, 255, 0.1);
    --text-color: #333;
    --card-bg: rgba(255, 255, 255, 0.2);
    --border-color: rgba(255, 255, 255, 0.2);
    --btn-bg: #ff7f50;
    --btn-shadow: rgba(255, 127, 80, 0.4);
    --input-bg: rgba(255, 255, 255, 0.8);
    --nav-bg: rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] {
    --bg-gradient: linear-gradient(45deg, #2c3e50, #000000);
    --container-bg: rgba(0, 0, 0, 0.6);
    --text-color: #f1f1f1;
    --card-bg: rgba(255, 255, 255, 0.05);
    --border-color: rgba(255, 255, 255, 0.1);
    --btn-bg: #e67e22;
    --btn-shadow: rgba(230, 126, 34, 0.4);
    --input-bg: rgba(255, 255, 255, 0.1);
    --nav-bg: rgba(0, 0, 0, 0.5);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background: var(--bg-gradient);
    color: var(--text-color);
    margin: 0;
    transition: background 0.3s ease, color 0.3s ease;
}

/* Navigation */
.navbar {
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
}

.nav-logo {
    font-size: 1.5em;
    font-weight: bold;
    text-decoration: none;
    color: var(--text-color);
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    margin: 0 15px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: opacity 0.3s;
}

.nav-menu a:hover {
    opacity: 0.7;
}

/* Container */
.container {
    max-width: 1000px;
    margin: 40px auto;
    padding: 40px;
    background: var(--container-bg);
    border-radius: 20px;
    backdrop-filter: blur(10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    text-align: center;
}

/* Hero Section */
.hero-section {
    margin-bottom: 50px;
}

h1 {
    font-size: 3em;
    margin-bottom: 10px;
}

.hero-section p {
    font-size: 1.2em;
    opacity: 0.9;
}

/* Generator */
.main-generator {
    margin-bottom: 60px;
}

#generate-btn {
    background-color: var(--btn-bg);
    color: white;
    border: none;
    padding: 20px 40px;
    font-size: 1.4em;
    font-weight: bold;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px var(--btn-shadow);
}

#generate-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px var(--btn-shadow);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.result-card {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 15px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

.number-ball {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.3em;
    font-weight: bold;
    color: white;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
    box-shadow: inset 0 -3px 6px rgba(0,0,0,0.2);
}

/* Info Sections */
.info-section {
    margin-top: 60px;
    text-align: left;
}

.info-content {
    margin-top: 20px;
}

.text-left {
    text-align: left;
}

.smaller-text {
    font-size: 0.9em;
    opacity: 0.8;
}

hr {
    border: 0;
    border-top: 1px solid var(--border-color);
    margin: 40px 0;
}

/* Ad Placeholder */
.ad-placeholder {
    background: rgba(0,0,0,0.05);
    padding: 20px;
    margin: 40px 0;
    border-radius: 10px;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Form */
.contact-form {
    max-width: 600px;
    margin: 30px auto 0;
    text-align: left;
}

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

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

.form-group input, .form-group textarea {
    width: 100%;
    padding: 15px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    background: var(--input-bg);
    color: var(--text-color);
    font-family: inherit;
}

.submit-btn {
    background-color: var(--btn-bg);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 1.1em;
    border-radius: 12px;
    cursor: pointer;
    width: 100%;
    font-weight: bold;
    box-shadow: 0 4px 10px var(--btn-shadow);
}

/* Footer */
.site-footer {
    text-align: center;
    padding: 40px 20px;
    opacity: 0.7;
    font-size: 0.9em;
}

.theme-toggle {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
}

/* Responsive */
@media (min-width: 768px) {
    .results-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .nav-menu {
        display: none; /* Mobile menu can be added later */
    }
    .container {
        padding: 20px;
        margin: 20px;
    }
    h1 {
        font-size: 2em;
    }
}