* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    min-height: 100vh; display: flex; justify-content: center; align-items: center;
    overflow: hidden; position: relative;
}
#particles-canvas {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none;
}
.card {
    background: rgba(255,255,255,0.08); backdrop-filter: blur(20px); border-radius: 24px;
    padding: 40px 32px; width: 90%; max-width: 480px;
    box-shadow: 0 30px 50px rgba(0,0,0,0.5), 0 0 30px rgba(100,180,255,0.2);
    border: 1px solid rgba(255,255,255,0.15); z-index: 10;
    display: flex; flex-direction: column; gap: 28px;
    animation: fadeInUp 0.8s ease-out;
}
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
.title {
    text-align: center; color: #eef5ff; font-size: 2rem; font-weight: 600;
    letter-spacing: 2px; text-shadow: 0 0 20px rgba(100,180,255,0.5);
    display: flex; align-items: center; justify-content: center; gap: 12px;
}
.title img { width: 40px; height: 40px; filter: drop-shadow(0 0 6px #4fc3f7); }
.input-group { display: flex; flex-direction: column; gap: 12px; }
.input-group label { color: #b3cde0; font-size: 0.9rem; letter-spacing: 1px; }
.input-wrapper { display: flex; gap: 12px; }
.input-wrapper input {
    flex: 1; padding: 14px 18px; border-radius: 40px;
    border: 1px solid rgba(255,255,255,0.2); background: rgba(0,0,0,0.4);
    color: #fff; font-size: 1rem; outline: none; transition: 0.3s; backdrop-filter: blur(5px);
}
.input-wrapper input:focus {
    border-color: #4fc3f7; box-shadow: 0 0 15px rgba(79,195,247,0.4);
    background: rgba(0,0,0,0.6);
}
.input-wrapper input::placeholder { color: rgba(255,255,255,0.45); }
.btn-verify {
    padding: 14px 28px; border-radius: 40px; border: none;
    background: linear-gradient(135deg, #00c6ff, #0072ff);
    color: white; font-weight: bold; letter-spacing: 1px; cursor: pointer;
    transition: 0.3s; box-shadow: 0 6px 20px rgba(0,114,255,0.4); white-space: nowrap;
}
.btn-verify:hover { transform: translateY(-2px); box-shadow: 0 10px 25px rgba(0,114,255,0.6); }
.btn-verify:active { transform: translateY(0); }
.result-box {
    min-height: 50px; border-radius: 14px; padding: 16px 20px; font-size: 0.95rem;
    color: #e0e0e0; background: rgba(0,0,0,0.35); backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.15); text-align: center; transition: 0.3s;
    display: flex; align-items: center; justify-content: center; word-break: break-word;
}
.result-box.success {
    border-color: #2ecc71; color: #d4ffea; background: rgba(46,204,113,0.15);
    box-shadow: 0 0 20px rgba(46,204,113,0.3);
}
.result-box.error {
    border-color: #e74c3c; color: #ffd6d6; background: rgba(231,76,60,0.15);
    box-shadow: 0 0 20px rgba(231,76,60,0.3);
}
.extra-features {
    margin-top: 10px; padding: 16px; border: 1px dashed rgba(255,255,255,0.3);
    border-radius: 16px; color: #aaa; text-align: center; font-size: 0.85rem;
    background: rgba(255,255,255,0.03);
}
.func-btn {
    margin: 6px; padding: 10px 18px; border-radius: 30px;
    border: 1px solid rgba(255,255,255,0.3); background: rgba(0,0,0,0.4);
    color: #ddd; cursor: pointer; transition: 0.3s;
}
.func-btn:hover {
    background: rgba(255,255,255,0.15); color: white;
    transform: translateY(-2px); box-shadow: 0 5px 15px rgba(0,0,0,0.4);
}
@media (max-width: 500px) {
    .card { padding: 28px 20px; }
    .input-wrapper { flex-direction: column; }
}