.panel {
    width: 31.25rem;
    overflow-x: hidden;
    border: 0.0625rem solid var(--color-border);
    padding: var(--space-2xl);
    display: none;
    max-height: calc(100vh - 17.5rem);
    overflow-y: auto;
    background: var(--color-bg-primary);
    border-radius: var(--space-lg);
    box-shadow: 0 0.75rem 3rem color-mix(in srgb, var(--color-text-primary) 12%, transparent),
        0 0 0.0625rem color-mix(in srgb, var(--color-primary) 50%, transparent);
    animation: panelSlideIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
}

.panel.active {
    display: block;
}

.panel h2 {
    margin-bottom: var(--space-xl);
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--color-primary);
    padding-bottom: var(--space-md);
    border-bottom: 0.125rem solid var(--color-primary-light);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    letter-spacing: -0.01875rem;
}

.form-group {
    margin-bottom: var(--space-xl);
    position: relative;
}

h3,
label {
    display: flex;
    margin-bottom: var(--space-sm);
    font-weight: 700;
    font-size: 0.75rem;
    color: var(--color-text-primary);
    letter-spacing: 0.03125rem;
    text-transform: uppercase;
    opacity: 0.9;
    transition: opacity 0.3s ease;
}

.form-group h3 {
    margin-top: var(--space-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--space-md) 0.875rem;
    border: 0.09375rem solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.875rem;
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    transition: all cubic-bezier(0.4, 0, 0.2, 1) 0.25s;
    outline: none;
    position: relative;
}

.form-group textarea {
    resize: vertical;
    min-height: 6.25rem;
    font-size: 0.8125rem;
    line-height: 1.5;
}

.form-group input[type="checkbox"] {
    width: var(--radius-xl);
    height: var(--radius-xl);
    margin-right: var(--space-sm);
    cursor: pointer;
    accent-color: var(--color-primary);
}

.form-group input[type="color"] {
    padding: var(--space-xs);
    height: 2.75rem;
    cursor: pointer;
    border-radius: var(--radius-md);
}

ul {
    list-style: none;
}

.keywords-container {
    margin-top: var(--space-sm);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.item {
    border: 0.0625rem solid var(--color-border-light);
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, color-mix(in srgb, var(--color-primary) 3%, transparent) 100%);
    padding: var(--space-lg);
    margin: var(--space-lg) 0;
    border-radius: var(--space-md);
    border-left: var(--space-xs) solid var(--color-primary);
    transition: all cubic-bezier(0.4, 0, 0.2, 1) 0.3s;
    position: relative;
    backdrop-filter: blur(0.125rem);
}

.item input,
.item select,
.item textarea {
    width: 100%;
    padding: var(--radius-md) var(--space-md);
    border: 0.09375rem solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.8125rem;
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    margin-bottom: var(--space-md);
    transition: all cubic-bezier(0.4, 0, 0.2, 1) 0.2s;
    outline: none;
    position: relative;
}

.keyword-tag-inline,
.keyword-tag {
    position: relative;
}

#output {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    overflow: hidden;
    width: 209.7mm;
    max-width: 100%;
    height: fit-content;
    box-shadow: 0 0.75rem 2rem 0 color-mix(in srgb, var(--color-text-primary) 12%, transparent);
    margin-bottom: 4.375rem;
    border: 0.0625rem solid var(--color-border);
}

#output h3 {
    margin: 0;
    padding: var(--space-lg) var(--space-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-bottom: 0.125rem solid var(--color-primary-light);
    font-size: 0.9375rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 0.025rem;
    text-shadow: 0 0.0625rem 0.125rem color-mix(in srgb, var(--color-text-primary) 10%, transparent);
    position: relative;
}

#previewFrame {
    width: 100%;
    height: auto;
    aspect-ratio: 209.7 / 297;
    border: 0.0625rem solid var(--color-border);
    background: var(--color-bg-primary);
    display: block;
}

.preview-container {
    padding: var(--space-xl) var(--space-2xl);
}

button#downloadPdf {
    background: var(--color-primary);
    color: var(--color-white);
}

.input-error {
    border-color: var(--color-error) !important;
    background-color: color-mix(in srgb, var(--color-error) 5%, var(--color-bg-primary)) !important;
    box-shadow: 0 0 0 0.1875rem color-mix(in srgb, var(--color-error) 15%, transparent) !important;
}

.input-error-message {
    display: block;
    font-size: 0.75rem;
    margin-bottom: var(--space-sm);
    color: var(--color-error);
    font-weight: 500;
    animation: slideDown 0.2s ease-out;
}

#toast-container {
    position: fixed;
    bottom: var(--space-lg);
    left: var(--space-lg);
    right: var(--space-lg);
    max-width: 28rem;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    z-index: 9999;
    pointer-events: none;
}

.toast {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--space-md);
    font-weight: 500;
    font-size: 0.875rem;
    backdrop-filter: blur(0.5rem);
    border: 0.0625rem solid color-mix(in srgb, var(--color-white) 20%, transparent);
    box-shadow: 0 0.5rem 1.5rem color-mix(in srgb, var(--color-text-primary) 20%, transparent);
    opacity: 0;
    transform: translateX(-120%);
    transition: all 0.3s ease-out;
    pointer-events: auto;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast-error {
    background-color: color-mix(in srgb, var(--color-error) 90%, var(--color-bg-primary));
    color: var(--color-white);
    border-color: color-mix(in srgb, var(--color-error) 30%, transparent);
}