/* UI Button */
.ui-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    border: none;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    min-height: 44px;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--text-inverse);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
    box-shadow: 0 0 20px var(--color-primary-glow);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover:not(:disabled) {
    background: var(--color-primary-glow);
}

.btn-danger {
    background-color: var(--color-error);
    color: white;
}

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid transparent;
}

.btn-ghost:hover:not(:disabled) {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-primary);
}

.ui-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* UI Input */
.ui-input-group {
    margin-bottom: var(--space-lg);
    width: 100%;
}

.ui-label {
    display: block;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    margin-bottom: var(--space-xs);
    letter-spacing: 0.1em;
}

.ui-input {
    width: 100%;
    padding: var(--space-md);
    background: var(--bg-surface-light);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-main);
    transition: var(--transition-fast);
}

.ui-input:focus {
    outline: none;
    border-color: var(--color-primary);
    background: var(--bg-surface);
    box-shadow: 0 0 0 4px var(--color-primary-glow);
}

.ui-input.error {
    border-color: var(--color-error);
}

.ui-error-msg {
    color: var(--color-error);
    font-size: 0.75rem;
    margin-top: var(--space-xs);
    display: block;
}

/* UI Card */
.ui-card {
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-base);
}

.ui-card-header {
    padding: var(--space-md) var(--space-lg);
    background: var(--glass-bg);
    border-bottom: 1px solid var(--glass-border);
}

.ui-card-body {
    padding: var(--space-lg);
}

/* UI Modal */
.ui-modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.85); /* Deep slate overlay */
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--space-lg);
}

.ui-modal-content {
    background: var(--bg-surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    width: 100%;
    max-height: calc(100vh - 48px); /* Center fit within padding boundary */
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.ui-modal-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--glass-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.ui-modal-close {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
    transition: var(--transition-fast);
}

.ui-modal-close:hover {
    color: var(--color-primary);
}

.ui-modal-body {
    padding: var(--space-lg);
    overflow-y: auto;
    flex-grow: 1;
}

/* Modal Footer (Sticky Premium Overlay) */
.modal-footer {
    position: sticky;
    bottom: -24px; /* Pull down over the modal-body padding */
    left: -24px;
    right: -24px;
    margin-bottom: -24px;
    margin-left: -24px;
    margin-right: -24px;
    margin-top: var(--space-lg);
    background: var(--bg-surface);
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--glass-border);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-md);
    z-index: 10;
    flex-shrink: 0;
}

/* Form Grids & Utilities */
.form-grid-2-1 {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-md);
    align-items: end;
}

.form-grid-1-1 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    align-items: end;
}

@media (max-width: 640px) {
    .form-grid-2-1, .form-grid-1-1 {
        grid-template-columns: 1fr;
    }
}

.mt-4 { margin-top: var(--space-md) !important; }
.mt-6 { margin-top: var(--space-lg) !important; }
.mb-2 { margin-bottom: var(--space-sm) !important; }
.pt-6 { padding-top: var(--space-lg) !important; }

/* Animations */
.scale-in {
    animation: scaleIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: inline-block;
    margin-right: var(--space-sm);
}

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

/* UI Dropmenus / Select elements */
select {
    width: 100%;
    padding: var(--space-md);
    background-color: var(--bg-surface-light);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    color: var(--text-main);
    transition: var(--transition-fast);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right var(--space-md) center;
    background-size: 16px;
    padding-right: var(--space-xl);
}

select:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: var(--bg-surface);
    box-shadow: 0 0 0 4px var(--color-primary-glow);
}

select option {
    background-color: var(--bg-surface);
    color: var(--text-main);
    padding: var(--space-sm);
}