/**
 * DMS Smart Monitor v1 - Component Styles
 * 
 * UI component styles built on design tokens.
 * Includes buttons, forms, cards, badges, alerts, and navigation.
 * 
 * @phase W2-01 - Design System Base
 */

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    height: var(--button-height);
    padding: 0 var(--button-padding-x);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-none);
    border-radius: var(--button-border-radius);
    border: 1px solid transparent;
    cursor: pointer;
    transition: 
        background-color var(--duration-fast) var(--ease-out),
        border-color var(--duration-fast) var(--ease-out),
        color var(--duration-fast) var(--ease-out),
        box-shadow var(--duration-fast) var(--ease-out),
        transform var(--duration-fast) var(--ease-out);
    text-decoration: none;
    white-space: nowrap;
}

.btn:hover {
    text-decoration: none;
}

.btn:focus-visible {
    outline: none;
    box-shadow: var(--shadow-focus);
}

.btn:active {
    transform: translateY(1px);
}

.btn:disabled,
.btn[aria-disabled="true"] {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Button sizes */
.btn-sm {
    height: var(--button-height-sm);
    padding: 0 var(--button-padding-x-sm);
    font-size: var(--font-size-xs);
}

.btn-lg {
    height: var(--button-height-lg);
    padding: 0 var(--button-padding-x-lg);
    font-size: var(--font-size-base);
}

.btn-block {
    width: 100%;
}

/* Primary button */
.btn-primary {
    background-color: var(--color-primary-600);
    color: var(--color-text-inverse);
    border-color: var(--color-primary-600);
}

.btn-primary:hover {
    background-color: var(--color-primary-700);
    border-color: var(--color-primary-700);
    color: var(--color-text-inverse);
}

/* Secondary button */
.btn-secondary {
    background-color: var(--color-secondary-200);
    color: var(--color-secondary-800);
    border-color: var(--color-secondary-200);
}

.btn-secondary:hover {
    background-color: var(--color-secondary-300);
    border-color: var(--color-secondary-300);
    color: var(--color-secondary-900);
}

/* Outline button */
.btn-outline {
    background-color: transparent;
    color: var(--color-text-primary);
    border-color: var(--color-border-strong);
}

.btn-outline:hover {
    background-color: var(--color-background-secondary);
    border-color: var(--color-text-primary);
}

/* Ghost button */
.btn-ghost {
    background-color: transparent;
    color: var(--color-text-primary);
    border-color: transparent;
}

.btn-ghost:hover {
    background-color: var(--color-background-tertiary);
}

/* Danger button */
.btn-danger {
    background-color: var(--color-error-600);
    color: var(--color-text-inverse);
    border-color: var(--color-error-600);
}

.btn-danger:hover {
    background-color: var(--color-error-700);
    border-color: var(--color-error-700);
    color: var(--color-text-inverse);
}

/* Success button */
.btn-success {
    background-color: var(--color-success-600);
    color: var(--color-text-inverse);
    border-color: var(--color-success-600);
}

.btn-success:hover {
    background-color: var(--color-success-700);
    border-color: var(--color-success-700);
    color: var(--color-text-inverse);
}

/* ============================================
   FORMS
   ============================================ */

.form-group {
    margin-bottom: var(--space-4);
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.form-label-required::after {
    content: ' *';
    color: var(--color-status-error);
}

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

.form-error {
    font-size: var(--font-size-sm);
    color: var(--color-status-error);
    margin-top: var(--space-1);
}

/* Input fields */
.form-control {
    display: block;
    width: 100%;
    height: var(--form-input-height);
    padding: 0 var(--form-input-padding-x);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-background-primary);
    border: 1px solid var(--color-border-default);
    border-radius: var(--form-input-border-radius);
    transition: 
        border-color var(--duration-fast) var(--ease-out),
        box-shadow var(--duration-fast) var(--ease-out);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary-500);
    box-shadow: var(--shadow-focus);
}

.form-control::placeholder {
    color: var(--color-text-tertiary);
}

.form-control:disabled,
.form-control[readonly] {
    background-color: var(--color-background-secondary);
    cursor: not-allowed;
    opacity: 0.7;
}

.form-control.is-invalid {
    border-color: var(--color-status-error);
}

.form-control.is-invalid:focus {
    box-shadow: var(--shadow-focus-error);
}

.form-control.is-valid {
    border-color: var(--color-status-success);
}

/* Input sizes */
.form-control-sm {
    height: var(--form-input-height-sm);
    font-size: var(--font-size-sm);
}

.form-control-lg {
    height: var(--form-input-height-lg);
    font-size: var(--font-size-lg);
}

/* Textarea */
textarea.form-control {
    height: auto;
    min-height: 6rem;
    padding-top: var(--space-2);
    padding-bottom: var(--space-2);
    resize: vertical;
}

/* Select */
select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right var(--space-3) center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: var(--space-10);
}

/* Checkbox and Radio */
.form-check {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    margin-bottom: var(--space-3);
}

.form-check-input {
    flex-shrink: 0;
    width: 1.125rem;
    height: 1.125rem;
    margin-top: 0.125rem;
    border: 1px solid var(--color-border-strong);
    background-color: var(--color-background-primary);
    cursor: pointer;
    transition: 
        border-color var(--duration-fast) var(--ease-out),
        background-color var(--duration-fast) var(--ease-out);
}

.form-check-input[type="checkbox"] {
    border-radius: var(--radius-md);
}

.form-check-input[type="radio"] {
    border-radius: var(--radius-full);
}

.form-check-input:focus {
    outline: none;
    border-color: var(--color-primary-500);
    box-shadow: var(--shadow-focus);
}

.form-check-input:checked {
    background-color: var(--color-primary-600);
    border-color: var(--color-primary-600);
}

.form-check-label {
    font-size: var(--font-size-sm);
    cursor: pointer;
}

/* Input groups */
.input-group {
    display: flex;
    align-items: stretch;
}

.input-group .form-control {
    border-radius: 0;
}

.input-group .form-control:first-child {
    border-top-left-radius: var(--form-input-border-radius);
    border-bottom-left-radius: var(--form-input-border-radius);
}

.input-group .form-control:last-child {
    border-top-right-radius: var(--form-input-border-radius);
    border-bottom-right-radius: var(--form-input-border-radius);
}

.input-group-text {
    display: flex;
    align-items: center;
    padding: 0 var(--space-3);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-normal);
    color: var(--color-text-secondary);
    background-color: var(--color-background-secondary);
    border: 1px solid var(--color-border-default);
}

.input-group-text:first-child {
    border-top-left-radius: var(--form-input-border-radius);
    border-bottom-left-radius: var(--form-input-border-radius);
    border-right: none;
}

.input-group-text:last-child {
    border-top-right-radius: var(--form-input-border-radius);
    border-bottom-right-radius: var(--form-input-border-radius);
    border-left: none;
}

/* Form layouts */
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
}

.form-inline {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: var(--space-4);
}

.form-inline .form-group {
    margin-bottom: 0;
}

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

.card {
    background-color: var(--color-background-primary);
    border-radius: var(--card-border-radius);
    box-shadow: var(--card-shadow);
    border: 1px solid var(--color-border-subtle);
    overflow: hidden;
}

.card-header {
    padding: var(--card-padding);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border-subtle);
}

.card-header h1,
.card-header h2,
.card-header h3,
.card-header h4,
.card-header h5,
.card-header h6 {
    margin-bottom: 0;
}

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

.card-footer {
    padding: var(--card-padding);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border-subtle);
    background-color: var(--color-background-secondary);
}

/* Card variants */
.card-flat {
    box-shadow: none;
    border: 1px solid var(--color-border-default);
}

.card-elevated {
    box-shadow: var(--shadow-lg);
}

.card-interactive {
    cursor: pointer;
    transition: 
        box-shadow var(--duration-fast) var(--ease-out),
        transform var(--duration-fast) var(--ease-out);
}

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

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

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--badge-padding-y) var(--badge-padding-x);
    font-size: var(--badge-font-size);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-none);
    border-radius: var(--badge-border-radius);
    white-space: nowrap;
}

/* Badge variants */
.badge-default {
    background-color: var(--color-background-tertiary);
    color: var(--color-text-secondary);
}

.badge-primary {
    background-color: var(--color-primary-100);
    color: var(--color-primary-700);
}

.badge-success {
    background-color: var(--color-status-success-bg);
    color: var(--color-status-success);
}

.badge-warning {
    background-color: var(--color-status-warning-bg);
    color: var(--color-status-warning);
}

.badge-danger {
    background-color: var(--color-status-error-bg);
    color: var(--color-status-error);
}

.badge-info {
    background-color: var(--color-status-info-bg);
    color: var(--color-status-info);
}

/* Badge with dot indicator */
.badge-dot::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    background-color: currentColor;
}

/* Badge sizes */
.badge-lg {
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-sm);
}

.badge-sm {
    padding: 2px var(--space-1-5);
    font-size: var(--font-size-xs);
}

/* Status indicators (standalone dot) */
.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    background-color: var(--color-status-inactive);
}

.status-dot-success { background-color: var(--color-status-success); }
.status-dot-warning { background-color: var(--color-status-warning); }
.status-dot-error { background-color: var(--color-status-error); }
.status-dot-info { background-color: var(--color-status-info); }
.status-dot-active { background-color: var(--color-status-active); }
.status-dot-pending { background-color: var(--color-status-pending); }

/* Pulsing status dot */
.status-dot-pulse {
    animation: status-pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes status-pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

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

.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
}

.alert-content {
    flex: 1;
}

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

.alert-message {
    font-size: var(--font-size-sm);
}

/* Alert variants */
.alert-success {
    background-color: var(--color-status-success-bg);
    border-color: var(--color-status-success-border);
    color: var(--color-success-800);
}

.alert-warning {
    background-color: var(--color-status-warning-bg);
    border-color: var(--color-status-warning-border);
    color: var(--color-warning-800);
}

.alert-danger {
    background-color: var(--color-status-error-bg);
    border-color: var(--color-status-error-border);
    color: var(--color-error-800);
}

.alert-info {
    background-color: var(--color-status-info-bg);
    border-color: var(--color-status-info-border);
    color: var(--color-info-800);
}

/* Alert dismissible */
.alert-dismissible {
    padding-right: var(--space-12);
    position: relative;
}

.alert-dismiss {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    padding: var(--space-1);
    background: none;
    border: none;
    cursor: pointer;
    opacity: 0.5;
    transition: opacity var(--duration-fast) var(--ease-out);
}

.alert-dismiss:hover {
    opacity: 1;
}

/* ============================================
   NAVIGATION
   ============================================ */

/* Header */
.app-header {
    height: var(--nav-height);
    background-color: var(--color-background-primary);
    border-bottom: 1px solid var(--color-border-default);
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.app-header-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.app-header-brand:hover {
    text-decoration: none;
    color: var(--color-text-primary);
}

.app-header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* Navigation bar */
.nav-bar {
    background-color: var(--color-background-primary);
    border-bottom: 1px solid var(--color-border-default);
    padding: 0 var(--space-6);
}

.nav-list {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    list-style: none;
    overflow-x: auto;
    scrollbar-width: none;
}

.nav-list::-webkit-scrollbar {
    display: none;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    border-radius: var(--radius-lg);
    white-space: nowrap;
    transition: 
        background-color var(--duration-fast) var(--ease-out),
        color var(--duration-fast) var(--ease-out);
}

.nav-link:hover {
    background-color: var(--color-background-secondary);
    color: var(--color-text-primary);
    text-decoration: none;
}

.nav-link.active {
    background-color: var(--color-primary-50);
    color: var(--color-primary-700);
}

/* Sidebar navigation */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--color-background-primary);
    border-right: 1px solid var(--color-border-default);
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: fixed;
    left: 0;
    top: 0;
    z-index: var(--z-fixed);
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-4);
    overflow-y: auto;
}

.sidebar-section {
    margin-bottom: var(--space-6);
}

.sidebar-section-title {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
    color: var(--color-text-tertiary);
    padding: 0 var(--space-3);
    margin-bottom: var(--space-2);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    border-radius: var(--radius-lg);
    transition: 
        background-color var(--duration-fast) var(--ease-out),
        color var(--duration-fast) var(--ease-out);
}

.sidebar-link:hover {
    background-color: var(--color-background-secondary);
    color: var(--color-text-primary);
    text-decoration: none;
}

.sidebar-link.active {
    background-color: var(--color-primary-50);
    color: var(--color-primary-700);
    font-weight: var(--font-weight-medium);
}

/* Breadcrumbs */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.breadcrumb-item:not(:last-child)::after {
    content: '/';
    color: var(--color-text-tertiary);
}

.breadcrumb-item a:hover {
    text-decoration: underline;
}

.breadcrumb-item:last-child {
    color: var(--color-text-primary);
    font-weight: var(--font-weight-medium);
}

/* ============================================
   FLASH MESSAGES / TOASTS
   ============================================ */

.flash-container {
    position: fixed;
    top: var(--space-4);
    right: var(--space-4);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    max-width: var(--container-sm);
    pointer-events: none;
}

.flash {
    pointer-events: auto;
    animation: flash-slide-in var(--duration-normal) var(--ease-out);
}

.flash.hiding {
    animation: flash-slide-out var(--duration-fast) var(--ease-in) forwards;
}

@keyframes flash-slide-in {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes flash-slide-out {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* ============================================
   DIVIDERS & SEPARATORS
   ============================================ */

.divider {
    height: 1px;
    background-color: var(--color-border-default);
    margin: var(--space-6) 0;
}

.divider-vertical {
    width: 1px;
    height: auto;
    align-self: stretch;
    margin: 0 var(--space-6);
}

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

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12) var(--space-6);
    text-align: center;
}

.empty-state-icon {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--space-4);
    opacity: 0.5;
}

.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 {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    max-width: var(--container-sm);
    margin-bottom: var(--space-6);
}

/* ============================================
   SKELETON LOADING
   ============================================ */

.skeleton {
    background: linear-gradient(
        90deg,
        var(--color-background-tertiary) 25%,
        var(--color-background-secondary) 50%,
        var(--color-background-tertiary) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--radius-md);
}

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

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

.skeleton-text:last-child {
    width: 80%;
}

.skeleton-avatar {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: var(--radius-full);
}

.skeleton-card {
    height: 8rem;
}