/**
 * SmartQuant Component Library
 * Reusable UI components following the design system
 */

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    line-height: 1;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Primary Button */
.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

/* Secondary Button */
.btn-secondary {
    background-color: var(--color-secondary);
    color: var(--color-text-inverse);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--color-secondary-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

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

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

/* Ghost Button */
.btn-ghost {
    background-color: transparent;
    color: var(--color-text-primary);
    box-shadow: none;
}

.btn-ghost:hover:not(:disabled) {
    background-color: var(--color-bg-secondary);
}

/* Danger Button */
.btn-danger {
    background-color: var(--color-danger);
    color: var(--color-text-inverse);
}

.btn-danger:hover:not(:disabled) {
    background-color: #b91c1c;
    transform: translateY(-1px);
}

/* Button Sizes */
.btn-sm {
    padding: var(--space-1) var(--space-2);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-lg);
}

/* Button with Icon */
.btn-icon {
    padding: var(--space-2);
    width: 2.5rem;
    height: 2.5rem;
}

.btn i {
    margin-right: var(--space-1);
}

.btn-icon i {
    margin: 0;
}

/* ========================================
   CARDS
   ======================================== */

.card {
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-header {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
    padding-bottom: var(--space-2);
    border-bottom: 1px solid var(--color-border);
}

.card-body {
    color: var(--color-text-secondary);
}

.card-footer {
    margin-top: var(--space-4);
    padding-top: var(--space-3);
    border-top: 1px solid var(--color-border);
    display: flex;
    gap: var(--space-2);
    justify-content: flex-end;
}

/* Card Variants */
.card-elevated {
    box-shadow: var(--shadow-lg);
}

.card-bordered {
    border: 2px solid var(--color-border-dark);
}

.card-flat {
    box-shadow: none;
    border: none;
}

/* ========================================
   FORM INPUTS
   ======================================== */

.form-group {
    margin-bottom: var(--space-3);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
}

.form-label-required::after {
    content: " *";
    color: var(--color-danger);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-2);
    font-size: var(--font-size-base);
    font-family: var(--font-family-primary);
    color: var(--color-text-primary);
    background-color: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
    background-color: var(--color-bg-secondary);
    color: var(--color-text-disabled);
    cursor: not-allowed;
}

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

.form-input-error:focus {
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-help-text {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-1);
}

.form-error-text {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--color-danger);
    margin-top: var(--space-1);
}

/* Checkbox & Radio */
.form-checkbox,
.form-radio {
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
}

.form-checkbox-label,
.form-radio-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
}

/* ========================================
   ALERTS / NOTIFICATIONS
   ======================================== */

.alert {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-md);
    border-left: 4px solid;
    margin-bottom: var(--space-3);
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
}

.alert-icon {
    flex-shrink: 0;
    font-size: var(--font-size-lg);
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-1);
}

.alert-success {
    background-color: rgba(5, 150, 105, 0.1);
    border-left-color: var(--color-success);
    color: var(--color-success);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    border-left-color: var(--color-warning);
    color: var(--color-warning);
}

.alert-danger {
    background-color: rgba(220, 38, 38, 0.1);
    border-left-color: var(--color-danger);
    color: var(--color-danger);
}

.alert-info {
    background-color: rgba(59, 130, 246, 0.1);
    border-left-color: var(--color-info);
    color: var(--color-info);
}

/* ========================================
   BADGES
   ======================================== */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-primary {
    background-color: rgba(30, 64, 175, 0.1);
    color: var(--color-primary);
}

.badge-success {
    background-color: rgba(5, 150, 105, 0.1);
    color: var(--color-success);
}

.badge-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
}

.badge-danger {
    background-color: rgba(220, 38, 38, 0.1);
    color: var(--color-danger);
}

/* ========================================
   MODALS
   ======================================== */

.sq-modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: var(--z-modal-backdrop);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
}

.sq-modal {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    z-index: var(--z-modal);
}

.sq-modal-header {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sq-modal-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.sq-modal-close {
    background: none;
    border: none;
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: var(--space-1);
    line-height: 1;
}

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

.sq-modal-body {
    padding: var(--space-4);
}

.sq-modal-footer {
    padding: var(--space-4);
    border-top: 1px solid var(--color-border);
    display: flex;
    gap: var(--space-2);
    justify-content: flex-end;
}

/* ========================================
   LOADING STATES
   ======================================== */

.spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spinner-rotate 0.75s linear infinite;
}

@keyframes spinner-rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.spinner-lg {
    width: 2rem;
    height: 2rem;
    border-width: 3px;
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-bg-secondary) 0%,
        var(--color-bg-tertiary) 50%,
        var(--color-bg-secondary) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 1rem;
    margin-bottom: var(--space-2);
}

.skeleton-heading {
    height: 2rem;
    width: 60%;
    margin-bottom: var(--space-3);
}

/* ========================================
   TOOLTIPS
   ======================================== */

.tooltip-wrapper {
    position: relative;
    display: inline-block;
}

.tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: var(--space-1);
    padding: var(--space-1) var(--space-2);
    background-color: #1f2937;
    color: #ffffff;
    font-size: var(--font-size-sm);
    border-radius: var(--radius-md);
    white-space: nowrap;
    z-index: var(--z-tooltip);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
}

.tooltip-wrapper:hover .tooltip {
    opacity: 1;
}

.tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: #1f2937;
}

/* ========================================
   EMPTY STATES
   ======================================== */

.empty-state {
    text-align: center;
    padding: var(--space-8) var(--space-4);
}

.empty-state-icon {
    font-size: 4rem;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-3);
}

.empty-state-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.empty-state-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

/* ========================================
   RESPONSIVE UTILITIES
   ======================================== */

@media (max-width: 768px) {
    /* btn width handled per-context in mobile.css — no forced full-width here */

    .sq-modal {
        max-width: 100%;
        margin: 0;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }
}