@import url('https://fonts.googleapis.com/css2?family=Black+Han+Sans&family=SUIT:wght@300;400;600;700&display=swap');

:root {
    --bg-1: #0b1026;
    --bg-2: #1a0f3f;
    --bg-3: #3b0f24;
    --card: rgba(255, 255, 255, 0.09);
    --card-strong: rgba(255, 255, 255, 0.16);
    --accent: #ffd54f;
    --accent-2: #ff6ad5;
    --accent-3: #45caff;
    --text: #f7f7ff;
    --muted: rgba(255, 255, 255, 0.65);
    --shadow: 0 30px 60px rgba(0, 0, 0, 0.35);
    --orb-a: rgba(69, 202, 255, 0.9);
    --orb-b: rgba(255, 106, 213, 0.8);
    --orb-c: rgba(255, 213, 79, 0.7);
    --nav-bg: rgba(11, 16, 38, 0.8);
}

body[data-theme='light'] {
    --bg-1: #f7fbff;
    --bg-2: #eef2ff;
    --bg-3: #ffeef5;
    --card: rgba(255, 255, 255, 0.7);
    --card-strong: rgba(255, 255, 255, 0.9);
    --accent: #ffb300;
    --accent-2: #ff5fa2;
    --accent-3: #2aa4ff;
    --text: #15162b;
    --muted: rgba(21, 22, 43, 0.6);
    --shadow: 0 24px 45px rgba(35, 45, 70, 0.15);
    --orb-a: rgba(45, 170, 255, 0.55);
    --orb-b: rgba(255, 96, 170, 0.45);
    --orb-c: rgba(255, 200, 80, 0.5);
    --nav-bg: rgba(247, 251, 255, 0.8);
}

* {
    box-sizing: border-box;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'SUIT', system-ui, sans-serif;
    color: var(--text);
    min-height: 100vh;
    background: radial-gradient(circle at top left, #1f274f 0%, transparent 45%),
        radial-gradient(circle at 10% 20%, #4e1c64 0%, transparent 35%),
        linear-gradient(140deg, var(--bg-1), var(--bg-2) 55%, var(--bg-3));
    overflow-x: hidden;
    padding-top: 80px;
}

/* Navbar Style */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 70px;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
}

.nav-content {
    width: min(1200px, 90%);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: 'Black Han Sans', sans-serif;
    font-size: 1.5rem;
    color: var(--accent);
    text-decoration: none;
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text);
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.nav-menu a:hover {
    color: var(--accent-3);
}

.page {
    width: min(980px, 90%);
    margin: 0 auto 4rem;
    position: relative;
    z-index: 2;
}

.hero {
    text-align: center;
    margin: 3rem 0 2.5rem;
}

.tag {
    letter-spacing: 0.35em;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--muted);
    margin: 0 0 0.75rem;
}

.hero h1 {
    font-family: 'Black Han Sans', sans-serif;
    font-size: clamp(2.4rem, 5vw, 4rem);
    margin: 0 0 0.75rem;
}

.subtitle {
    margin: 0;
    color: var(--muted);
    font-size: 1rem;
}

.panel {
    background: var(--card);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 24px;
    padding: 2.5rem;
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
    margin-bottom: 2rem;
}

/* Content Sections */
.content-section h2 {
    font-family: 'Black Han Sans', sans-serif;
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.article-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.info-card {
    background: var(--card-strong);
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.info-card h3 {
    margin-top: 0;
    color: var(--accent-3);
}

.tip-list {
    padding-left: 1.2rem;
    line-height: 1.8;
}

.tip-list li {
    margin-bottom: 1rem;
}

/* Controls & Results */
.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
}

.button-row {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.ghost-button {
    background: transparent;
    color: var(--text);
    border: 1px solid rgba(255, 255, 255, 0.35);
    padding: 0.85rem 1.6rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 999px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.range-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

#set-count {
    width: 200px;
    accent-color: var(--accent);
}

#set-count-value {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--accent);
}

#generate-button {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #1c0f2b;
    border: none;
    padding: 0.95rem 2.3rem;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 999px;
    cursor: pointer;
    box-shadow: 0 16px 35px rgba(255, 106, 213, 0.35);
}

.results {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card {
    background: var(--card-strong);
    border-radius: 18px;
    padding: 1.25rem;
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.ball-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    align-items: center;
}

.ball {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: #0e0e1f;
    background: white;
    animation: pop 0.5s ease both;
}

/* Legal Section */
.legal-section {
    text-align: center;
}

.legal-links {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.legal-links a {
    color: var(--muted);
    font-size: 0.9rem;
    text-decoration: none;
}

.legal-content {
    text-align: left;
    font-size: 0.85rem;
    color: var(--muted);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
}

/* Contact Form Premium Style */
.contact-section {
    margin-top: 3rem;
}

.section-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.section-header h2 {
    font-family: 'Black Han Sans', sans-serif;
    color: var(--accent-3);
    margin-bottom: 0.5rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 650px;
    margin: 0 auto;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    text-align: left;
}

.form-group label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--muted);
    padding-left: 0.5rem;
}

.form-group input,
.form-group textarea {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 1rem 1.2rem;
    color: var(--text);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

body[data-theme='light'] .form-group input,
body[data-theme='light'] .form-group textarea {
    background: rgba(0, 0, 0, 0.03);
    border-color: rgba(0, 0, 0, 0.08);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-3);
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 0 20px rgba(69, 202, 255, 0.15);
}

.submit-button {
    background: linear-gradient(135deg, var(--accent-3), #2aa4ff);
    color: white;
    border: none;
    padding: 1.1rem;
    font-size: 1.1rem;
    font-weight: 700;
    border-radius: 16px;
    cursor: pointer;
    margin-top: 1rem;
    box-shadow: 0 12px 30px rgba(42, 164, 255, 0.3);
    transition: all 0.3s ease;
}

.submit-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 18px 40px rgba(42, 164, 255, 0.45);
}

.submit-button:active {
    transform: translateY(0);
}

.footnote {
    text-align: center;
    color: var(--muted);
    font-size: 0.85rem;
    margin-top: 3rem;
}

@keyframes pop {
    0% { transform: scale(0.6); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.bg-orb {
    position: fixed;
    border-radius: 50%;
    opacity: 0.5;
    z-index: 1;
    filter: blur(80px);
}

.orb-a { width: 400px; height: 400px; background: var(--orb-a); top: -100px; left: -100px; }
.orb-b { width: 500px; height: 500px; background: var(--orb-b); bottom: -150px; right: -150px; }
.orb-c { width: 300px; height: 300px; background: var(--orb-c); top: 20%; right: 10%; }

@media (max-width: 720px) {
    .nav-menu { display: none; }
    .hero h1 { font-size: 2.2rem; }
    .panel { padding: 1.5rem; }
    .controls { flex-direction: column; align-items: stretch; }
}