/**
 * STEP 1 EXPLORERS - SHARED COMPONENTS
 *
 * Reusable component styles for Conditions, Medications, and Bugs explorers.
 * Ensures visual consistency across all platforms.
 *
 * Last Updated: October 20, 2025
 * Phase: 3 - Shared Design System
 */

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: var(--button-padding-y) var(--button-padding-x);
    border-radius: var(--button-radius);
    font-size: var(--font-size-base);
    font-weight: var(--button-font-weight);
    line-height: 1;
    text-decoration: none;
    cursor: pointer;
    transition: background-color var(--transition-base),
                color var(--transition-base),
                transform var(--transition-fast),
                box-shadow var(--transition-base);
    border: none;
}

.btn:hover:not(:disabled) {
    transform: translateY(-1px);
}

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

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

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

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

.btn-secondary {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

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

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

.btn-success:hover:not(:disabled) {
    background-color: #1f8f4e;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
}

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

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

.card {
    background: var(--card-bg);
    border-radius: var(--card-radius);
    padding: var(--card-padding);
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-base),
                box-shadow var(--transition-base);
    border: 1px solid var(--card-border);
}

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

.card-header {
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--color-border-primary);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    margin: 0;
}

.card-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    margin-top: var(--space-xs);
}

.card-body {
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
}

.card-footer {
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-sm);
}

/* ========================================================================
   TAGS & BADGES
   ======================================================================== */

.tag {
    display: inline-block;
    padding: var(--tag-padding-y) var(--tag-padding-x);
    border-radius: var(--tag-radius);
    font-size: var(--tag-font-size);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    transition: transform var(--transition-fast),
                box-shadow var(--transition-fast);
    white-space: nowrap;
}

.tag:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-sm);
}

/* Tag Variants - Medications */
.tag.indication {
    background-color: var(--tag-indication-bg);
    color: var(--tag-indication-text);
}

.tag.contraindication {
    background-color: var(--tag-contraindication-bg);
    color: var(--tag-contraindication-text);
}

.tag.side-effect {
    background-color: var(--tag-side-effect-bg);
    color: var(--tag-side-effect-text);
}

.tag.mechanism {
    background-color: var(--tag-mechanism-bg);
    color: var(--tag-mechanism-text);
}

.tag.interaction {
    background-color: var(--tag-interaction-bg);
    color: var(--tag-interaction-text);
}

/* Tag Variants - Classes */
.tag.class {
    background-color: var(--tag-class-bg);
    color: var(--tag-class-text);
}

.tag.subclass {
    background-color: var(--tag-subclass-bg);
    color: var(--tag-subclass-text);
}

.tag.system {
    background-color: var(--tag-system-bg);
    color: var(--tag-system-text);
}

/* Badge Variants - Severity */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
}

.badge.severity-high {
    background-color: var(--severity-high-bg);
    color: var(--severity-high-text);
}

.badge.severity-medium {
    background-color: var(--severity-medium-bg);
    color: var(--severity-medium-text);
}

.badge.severity-low {
    background-color: var(--severity-low-bg);
    color: var(--severity-low-text);
}

/* Badge Variants - Acuity */
.badge.acuity-acute {
    background-color: var(--acuity-acute-bg);
    color: var(--acuity-acute-text);
}

.badge.acuity-chronic {
    background-color: var(--acuity-chronic-bg);
    color: var(--acuity-chronic-text);
}

/* Tag Highlight (for search results) */
.tag-highlight {
    box-shadow: 0 0 0 2px rgba(231, 76, 60, 0.35);
    background-color: var(--tag-side-effect-bg);
    color: var(--severity-high);
}

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

.modal {
    position: fixed;
    inset: 0;
    background: var(--modal-backdrop-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: var(--z-modal);
    animation: fadeIn var(--duration-base) var(--ease-out);
}

.modal.hidden {
    display: none;
}

.modal-content {
    position: relative;
    max-width: var(--modal-max-width);
    width: 100%;
    background: var(--modal-bg);
    border-radius: var(--modal-radius);
    padding: 28px;
    box-shadow: var(--modal-shadow);
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    animation: slideUp var(--duration-base) var(--ease-out);
}

.modal-content h2 {
    margin: 0;
    font-size: var(--font-size-2xl);
    color: var(--color-text-primary);
}

.modal-content h3 {
    margin: 12px 0 4px;
    font-size: var(--font-size-lg);
    color: var(--color-text-primary);
}

.modal-content p {
    margin: 0;
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
}

.modal-content ul {
    margin: 0 0 8px 18px;
    padding: 0;
    color: var(--color-text-secondary);
}

.modal-content a {
    color: var(--color-link);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
}

.modal-content a:hover {
    text-decoration: underline;
}

.modal-close {
    position: absolute;
    top: 10px;
    right: 12px;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-tertiary);
    cursor: pointer;
    transition: color var(--transition-base);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

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

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

.tooltip {
    position: absolute;
    z-index: var(--z-tooltip);
    background: var(--color-text-primary);
    color: var(--color-text-inverse);
    padding: 8px 12px;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-tight);
    max-width: 300px;
    box-shadow: var(--shadow-lg);
    animation: fadeIn var(--duration-fast) var(--ease-out);
    pointer-events: none;
}

.tooltip::before {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid var(--color-text-primary);
}

/* ========================================================================
   ALERTS & MESSAGES
   ======================================================================== */

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

.alert-success {
    background-color: var(--status-success-bg);
    border-color: var(--status-success);
    color: var(--status-success-text);
}

.alert-warning {
    background-color: var(--status-warning-bg);
    border-color: var(--status-warning);
    color: var(--status-warning-text);
}

.alert-error {
    background-color: var(--status-error-bg);
    border-color: var(--status-error);
    color: var(--status-error-text);
}

.alert-info {
    background-color: var(--status-info-bg);
    border-color: var(--status-info);
    color: var(--status-info-text);
}

.alert-icon {
    flex-shrink: 0;
    font-size: 1.2em;
}

.alert-content {
    flex: 1;
}

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

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

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--color-border-primary);
    border-top-color: var(--color-primary);
    border-radius: var(--radius-full);
    animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
}

.loading-overlay .loading {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

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

.empty-state {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--color-text-tertiary);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.empty-state p {
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-lg);
}

/* ========================================================================
   ANIMATIONS
   ======================================================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
    }
    to {
        opacity: 1;
        max-height: 2000px;
    }
}

.fade-enter {
    opacity: 0.85;
    transform: translateY(6px);
    transition: opacity var(--duration-base) var(--ease-out),
                transform var(--duration-base) var(--ease-out);
}

.fade-enter.fade-enter-active {
    opacity: 1;
    transform: translateY(0);
}

.fade-enter-left {
    opacity: 0.85;
    transform: translateX(-10px);
    transition: opacity var(--duration-base) var(--ease-out),
                transform var(--duration-base) var(--ease-out);
}

.fade-enter-left.fade-enter-active {
    opacity: 1;
    transform: translateX(0);
}

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

@media (max-width: 768px) {
    .card {
        padding: var(--space-md);
    }

    .modal-content {
        padding: 20px;
        max-height: calc(100vh - 40px);
    }

    .empty-state {
        padding: var(--space-xl);
    }
}