:root {
    --background: #10041f;
    --surface: rgba(38, 16, 70, 0.94);
    --purple: #a855f7;
    --purple-light: #e6c7ff;
    --gold: #e5c56b;
    --text: #ffffff;
    --text-muted: #ded2ea;
    --success: #d1fae5;
    --error: #fee2e2;
    --radius: 20px;
}

* { box-sizing: border-box; }

body {
    min-width: 320px;
    min-height: 100dvh;
    margin: 0;
    overflow-x: hidden;
    color: var(--text);
    font: 16px/1.5 Inter, system-ui, sans-serif;
    background:
        radial-gradient(circle at 50% -10%, #5b2495 0%, transparent 42%),
        radial-gradient(circle at 95% 100%, #28104f 0%, transparent 34%),
        var(--background);
}

button, input { font: inherit; }
button { cursor: pointer; }

.app-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: min(100%, 500px);
    min-height: 100dvh;
    margin: 0 auto;
    padding: 28px 16px 24px;
}

.header { width: 100%; text-align: center; }
.logo {
    display: block;
    width: min(100%, 255px);
    max-height: 90px;
    margin: 0 auto 8px;
    object-fit: contain;
}
.sponsor-badge {
    margin: 0;
    color: var(--gold);
    font: 700 0.75rem/1.4 Montserrat, sans-serif;
    letter-spacing: 0.08em;
}

.form-card-box {
    width: 100%;
    margin-top: 22px;
    padding: 24px;
    border: 1px solid rgba(230, 199, 255, 0.72);
    border-radius: var(--radius);
    background: var(--surface);
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.38), 0 0 32px rgba(168, 85, 247, 0.16);
}

.card-title-banner {
    margin: 0;
    font: 800 clamp(1.5rem, 6vw, 1.9rem)/1.2 Montserrat, sans-serif;
    text-align: center;
    text-transform: uppercase;
}
.form-intro {
    margin: 10px 0 22px;
    color: var(--text-muted);
    text-align: center;
}
.registration-form { display: grid; gap: 14px; }

input {
    width: 100%;
    min-height: 50px;
    padding: 12px 15px;
    border: 1px solid rgba(230, 199, 255, 0.8);
    border-radius: 13px;
    color: var(--text);
    background: rgba(17, 5, 33, 0.58);
}
input::placeholder { color: #e9d8f8; opacity: 1; }
input:focus-visible, button:focus-visible {
    outline: 3px solid var(--gold);
    outline-offset: 3px;
    border-color: var(--gold);
}

.submit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 62px;
    padding: 16px 20px;
    margin-top: 4px;
    border: 1px solid var(--purple-light);
    border-radius: 14px;
    color: var(--text);
    background: linear-gradient(135deg, #7e22ce, var(--purple));
    box-shadow: 0 8px 22px rgba(168, 85, 247, 0.28);
    font: 800 1.05rem/1 Montserrat, sans-serif;
    text-transform: uppercase;
    transition: background 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}
.submit-btn:hover:not(:disabled) {
    box-shadow: 0 10px 26px rgba(168, 85, 247, 0.5);
    transform: translateY(-1px);
}
.submit-btn:disabled { cursor: wait; opacity: 0.72; }
.btn-loading:not([hidden]) { display: inline-flex; align-items: center; gap: 10px; }
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 700ms linear infinite;
}

.form-message {
    margin: 2px 0 0;
    padding: 12px 14px;
    border-radius: 12px;
    font-weight: 600;
    text-align: center;
}
.form-message--success { color: #14532d; background: var(--success); }
.form-message--error { color: #7f1d1d; background: var(--error); }

.footer {
    margin-top: auto;
    padding-top: 28px;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-align: center;
}
.footer p { margin: 0; }

@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 480px) {
    .app-container { padding: 22px 14px 20px; }
    .form-card-box { margin-top: 18px; padding: 22px 16px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 1ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 1ms !important;
    }
}