:root {
    --bg-gradient: radial-gradient(circle at 50% 0%, #1a1a1a 0%, #000000 100%);
    --glass-bg: rgba(20, 20, 20, 0.8);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-main: #fff;
    --text-muted: rgba(255,255,255,0.5);
    --accent-cyan: #00FFFF;
    --input-bg: rgba(0,0,0,0.5);
}
* { box-sizing: border-box; }
body {
    margin: 0; padding: 0;
    background: var(--bg-gradient); background-attachment: fixed;
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    min-height: 100vh; display: flex; flex-direction: column; align-items: center;
}
.site-header { margin-top: 4vh; margin-bottom: 2vh; display: flex; justify-content: center; }
.nav-tabs {
    display: flex; gap: 10px; margin-bottom: 30px;
    background: rgba(255,255,255,0.05); padding: 5px; border-radius: 100px;
    border: 1px solid var(--card-border);
}
.tab-btn {
    background: transparent; border: none; color: var(--text-muted);
    padding: 10px 25px; border-radius: 20px; cursor: pointer;
    font-size: 0.9rem; font-weight: 600; transition: all 0.3s ease;
}
.tab-btn:hover { color: #fff; }
.tab-btn.active {
    background: rgba(255,255,255,0.1); color: #fff;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}
.content-card {
    width: 90%; max-width: 800px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--card-border);
    border-radius: 24px; padding: 40px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.5); margin-bottom: 50px;
}
.page-section { display: none; animation: fadeIn 0.4s ease; }
.page-section.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }
h1 { font-size: 2rem; margin: 0 0 20px 0; background: linear-gradient(90deg, #fff, #888); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
h2 { font-size: 0.8rem; margin: 30px 0 15px 0; color: var(--accent-cyan); text-transform: uppercase; letter-spacing: 1px; }
p, ul { line-height: 1.8; color: #ccc; margin-bottom: 20px; font-weight: 300; }
.form-group { margin-bottom: 20px; }
.form-label { display: block; color: var(--text-muted); font-size: 0.8rem; margin-bottom: 8px; margin-left: 5px; }
.styled-textarea {
    width: 100%; background: var(--input-bg); border: 1px solid var(--card-border);
    color: #fff; padding: 15px; border-radius: 12px; font-size: 1rem;
    transition: border-color 0.3s; font-family: inherit; outline: none; resize: vertical; min-height: 120px;
}
.styled-textarea:focus { border-color: var(--accent-cyan); }
.submit-btn {
    background: #fff; color: #000; font-weight: 800; border: none;
    padding: 15px 40px; border-radius: 100px; cursor: pointer;
    transition: transform 0.2s; text-transform: uppercase; letter-spacing: 1px; margin-top: 10px;
}
.submit-btn:hover { transform: scale(1.05); }
.back-link {
    position: fixed; top: 30px; left: 30px; color: var(--text-muted); text-decoration: none;
    font-weight: bold; font-size: 0.9rem; display: flex; align-items: center; gap: 8px; z-index: 100;
}
.back-link:hover { color: #fff; }
@media (max-width: 600px) {
    .content-card { padding: 25px; width: 95%; }
    .nav-tabs { width: 95%; justify-content: space-between; }
    .back-link { position: absolute; top: 20px; left: 20px; }
}