/* === Forms ===
 * Common form element styles extracted from course.css, profile.css.
 */

/* ── Form field wrapper ─────────────────────── */
.form__field {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.form__field--inline {
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ── Labels ─────────────────────────────────── */
.form__label {
    font-family: var(--font-primary);
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--color-primary);
    line-height: var(--leading-normal);
}

.form__label--required::after {
    content: " *";
    color: var(--color-accent);
}

/* ── Inputs ─────────────────────────────────── */
.form__input {
    padding: 8px 12px;
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-text);
    background: var(--color-white);
    border: 1px solid var(--color-border-dark);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition-fast);
    outline: none;
}

.form__input:focus {
    border-color: var(--color-primary-border);
    box-shadow: 0 0 0 2px var(--color-primary-bg);
}

.form__input--error,
.form__select--error {
    border-color: var(--color-error);
    background: #FFF5F5;
    box-shadow: 0 0 0 1px var(--color-error-alpha);
}
[data-theme="dark"] .form__input--error,
[data-theme="dark"] .form__select--error {
    background: rgba(239, 68, 68, 0.08);
}
.form__input--error:focus,
.form__select--error:focus {
    box-shadow: 0 0 0 2px var(--color-error-alpha);
}

/* ── Select ─────────────────────────────────── */
.form__select {
    padding: 8px 12px;
    font-family: var(--font-primary);
    font-size: var(--text-base);
    line-height: var(--leading-normal);
    color: var(--color-text);
    background: var(--color-white);
    border: 1px solid var(--color-border-dark);
    border-radius: var(--radius-sm);
    outline: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23405593' stroke-width='2' fill='none'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
    transition: border-color var(--transition-fast);
}

.form__select:focus {
    border-color: var(--color-primary-border);
    box-shadow: 0 0 0 2px var(--color-primary-bg);
}

/* ── Error messages ─────────────────────────── */
.errorlist,
.form__error {
    font-family: var(--font-primary);
    font-size: var(--text-xs);
    color: var(--color-error);
    line-height: var(--leading-normal);
    list-style: none;
    padding: 0;
    margin: 2px 0 0;
}
.errorlist li {
    margin: 0;
}

/* ── Help text ──────────────────────────────── */
.form__help {
    font-family: var(--font-primary);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    line-height: var(--leading-normal);
}

/* ── Checkbox / Radio ───────────────────────── */
.form__checkbox,
.form__radio {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-family: var(--font-primary);
    font-size: var(--text-base);
    color: var(--color-text);
}

/* ── File input ─────────────────────────────── */
.form__file {
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-primary);
    font-size: var(--text-base);
    color: var(--color-text);
    background: var(--color-primary-bg);
    border: 1px dashed var(--color-primary-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
}
.form__file:hover {
    background: var(--color-bg-secondary);
}

/* ── Drop zone (drag-and-drop upload) ───────────── */
.drop-zone {
    position: relative;
    border: 2px dashed var(--color-border-dark);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
    background: var(--color-bg-tertiary);
}

.drop-zone:hover,
.drop-zone--active {
    border-color: var(--color-primary);
    background: var(--color-primary-bg);
    transform: scale(1.01);
}

.drop-zone__icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-muted);
}

.drop-zone__text {
    color: var(--color-text-muted);
    font-size: var(--text-sm);
}

.drop-zone__text strong {
    color: var(--color-link);
}

.drop-zone__hint {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
    opacity: 0.8;
}

.drop-zone[data-drop-type="image"] .drop-zone__icon {
    font-size: 2.25rem;
}

.drop-zone[data-drop-type="image"] {
    border-style: solid;
    border-color: var(--color-border);
    background: var(--color-bg-secondary);
}

.drop-zone[data-drop-type="image"]:hover,
.drop-zone[data-drop-type="image"].drop-zone--active {
    border-color: var(--color-primary);
    background: var(--color-primary-bg);
}

.drop-zone__preview {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.drop-zone__preview-item {
    position: relative;
    width: 80px;
    height: 80px;
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.drop-zone__preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.drop-zone__preview-remove {
    position: absolute;
    top: 2px;
    right: 2px;
    width: 20px;
    height: 20px;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 12px;
    line-height: 20px;
    text-align: center;
}

.drop-zone__progress {
    height: 4px;
    margin-top: var(--spacing-md);
    background: var(--color-border);
    border-radius: 2px;
    overflow: hidden;
}

.drop-zone__progress-bar {
    height: 100%;
    width: 0%;
    background: var(--color-primary);
    transition: width 0.3s var(--ease-out);
}

/* Existing saved file indicator */
.drop-zone__existing {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-primary-bg);
    border: 1px solid var(--color-primary-border);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    white-space: nowrap;
    min-width: 0;
}
.drop-zone__existing-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 220px;
    color: var(--color-text);
}
.drop-zone__existing-link {
    flex-shrink: 0;
    color: var(--color-link);
    font-weight: 600;
    text-decoration: none;
    padding: var(--spacing-2xs) var(--spacing-xs);
    border: 1px solid var(--color-primary-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}
.drop-zone__existing-link:hover {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* Hidden native input inside drop zone */
.drop-zone input[type="file"] {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}