/* Registration page — variables.css linked separately in index.php */
body.page-register {
    margin: 0;
    background: var(--color-bg-gradient);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-lg) var(--space-md);
    padding-bottom: calc(var(--space-lg) + env(safe-area-inset-bottom));
}

.register-shell {
    width: 100%;
    max-width: 780px;
}

.register-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.event-image {
    display: block;
    width: 100%;
    aspect-ratio: 2048 / 1072;
    object-fit: cover;
    background: var(--color-brand-muted);
    border-bottom: 3px solid var(--color-accent);
}

.sponsor-bar {
    position: relative;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-sm);
    border-bottom: 3px solid var(--color-accent);
    background: #fafafa;
}

.sponsors-label {
    position: absolute;
    top: -14px;
    left: var(--space-md);
    background: var(--color-accent);
    color: #fff;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.sponsor-bar img {
    height: 56px;
    width: auto;
    max-width: 140px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    background: #fff;
    padding: 4px;
}

.form-content {
    padding: var(--space-xl) var(--space-lg);
}

.register-title {
    margin: 0 0 var(--space-md);
    text-align: center;
    font-size: clamp(1.375rem, 4vw, 1.75rem);
    font-weight: 800;
    color: var(--color-heading);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.language-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    margin-bottom: var(--space-lg);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.language-selector a {
    color: var(--color-brand);
    font-weight: 700;
    text-decoration: none;
    padding: 4px 6px;
    border-radius: var(--radius-sm);
}

.language-selector a:hover {
    color: var(--color-accent);
    background: #fff5f5;
}

.language-selector span:not(.language-separator) {
    color: var(--color-brand-dark);
    font-weight: 800;
    padding: 4px 6px;
}

.language-separator {
    color: #9abfc0;
}

/* Alerts */
.alert {
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-md);
    font-size: 0.9375rem;
    line-height: 1.5;
}

.alert-success {
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid var(--color-success-border);
}

.alert-error {
    background: var(--color-danger-bg);
    color: var(--color-danger);
    border: 1px solid var(--color-danger-border);
}

.error-list {
    list-style: none;
    margin: var(--space-sm) 0 0;
    padding: 0;
}

.error-list li {
    padding: 4px 0;
    padding-left: 1.25rem;
    position: relative;
}

.error-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    font-weight: 700;
}

.info-box {
    background: var(--color-brand-muted);
    border: 1px solid var(--color-border-strong);
    border-left: 4px solid var(--color-brand-light);
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
    line-height: 1.55;
}

/* Form sections */
.register-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.form-section-title {
    margin: 0;
    font-size: 0.75rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-brand);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--color-border);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

label {
    color: var(--color-text);
    font-weight: 700;
    font-size: 0.875rem;
}

label .required {
    color: var(--color-accent);
}

input[type="text"],
input[type="email"],
input[type="number"],
textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    background: var(--color-surface-raised);
    color: var(--color-heading);
    transition: border-color var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}

input:focus,
textarea:focus {
    outline: none;
    border-color: var(--color-brand-light);
    box-shadow: var(--focus-ring);
}

textarea {
    resize: vertical;
    min-height: 128px;
    line-height: 1.5;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.form-row--vehicle {
    grid-template-columns: 1.4fr 1fr 0.7fr;
}

.field-hint {
    font-size: 0.75rem;
    color: var(--color-text-subtle);
    line-height: 1.4;
}

/* Image upload dropzone */
.upload-zone {
    position: relative;
    border: 2px dashed var(--color-border-strong);
    border-radius: var(--radius-md);
    padding: var(--space-lg) var(--space-md);
    text-align: center;
    background: var(--color-surface-raised);
    cursor: pointer;
    transition: border-color var(--duration) var(--ease), background var(--duration) var(--ease);
}

.upload-zone:hover,
.upload-zone.is-dragover {
    border-color: var(--color-brand-light);
    background: var(--color-brand-muted);
}

.upload-zone input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
}

.upload-zone-icon {
    font-size: 2rem;
    margin-bottom: var(--space-sm);
    line-height: 1;
}

.upload-zone-title {
    margin: 0 0 4px;
    font-weight: 700;
    color: var(--color-heading);
    font-size: 0.9375rem;
}

.upload-zone-hint {
    margin: 0;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.upload-preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(88px, 1fr));
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.upload-preview:empty {
    display: none;
}

.preview-item {
    position: relative;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--color-border-strong);
    aspect-ratio: 1;
    background: #eee;
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.preview-item button {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 28px;
    height: 28px;
    border: none;
    border-radius: var(--radius-full);
    background: rgba(0, 0, 0, 0.65);
    color: #fff;
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-label {
    margin: var(--space-sm) 0 0;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-brand);
}

/* Buttons */
.button-group {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: var(--touch-min);
    padding: 12px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    flex: 1;
    transition: background var(--duration) var(--ease), transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--color-accent);
    color: #fff;
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-accent-hover);
    box-shadow: 0 6px 20px rgba(209, 0, 0, 0.22);
}

.btn-primary:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--color-brand-dark);
    color: #fff;
}

.btn-secondary:hover {
    background: #1a3a3c;
}

.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-loading::after {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

/* Responsive */
@media (max-width: 720px) {
    body.page-register {
        padding: var(--space-md) var(--space-sm);
        align-items: stretch;
    }

    .form-content {
        padding: var(--space-lg) var(--space-md);
    }

    .form-row,
    .form-row--vehicle {
        grid-template-columns: 1fr;
    }

    .button-group {
        flex-direction: column;
    }

    .sponsor-bar {
        padding-top: var(--space-lg);
    }
}

@media (max-width: 400px) {
    .register-title {
        font-size: 1.25rem;
    }
}