/* ========================================
   CSS Variables & Reset
   ======================================== */
:root {
    /* Colors */
    --primary-blue: #1976d2;
    --primary-dark: #1565c0;
    --secondary-gray: #757575;
    --success-green: #388e3c;
    --success-light: #c8e6c9;
    --error-red: #d32f2f;
    --error-light: #ffcdd2;
    --warning-orange: #f57c00;
    --warning-light: #fff9c4;
    --background-light: #f5f5f5;
    --surface-white: #ffffff;
    --text-primary: #212121;
    --text-secondary: #757575;
    --border-color: #e0e0e0;
    --border-color-dark: #ddd;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;

    /* Breakpoints */
    --bp-mobile: 320px;
    --bp-tablet: 768px;
    --bp-desktop: 1024px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--background-light);
}

/* ========================================
   Layout
   ======================================== */
#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ========================================
   Header
   ======================================== */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--surface-white);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--primary-blue);
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-blue);
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    border: none;
    background: transparent;
    border-radius: 50%;
    cursor: pointer;
    color: var(--text-secondary);
    transition: background 0.2s;
}

.btn-icon:hover {
    background: var(--background-light);
    color: var(--primary-blue);
}

.btn-icon svg {
    width: 20px;
    height: 20px;
}

/* ========================================
   Navigation
   ======================================== */
.nav {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--background-light);
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    border-radius: 0.375rem;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: all 0.2s;
    white-space: nowrap;
}

.nav-btn:hover {
    background: rgba(25, 118, 210, 0.1);
    color: var(--primary-blue);
}

.nav-btn.active {
    background: var(--primary-blue);
    color: white;
}

.nav-btn svg {
    width: 18px;
    height: 18px;
}

/* ========================================
   Main Content
   ======================================== */
.main-content {
    flex: 1;
    padding: var(--spacing-md);
    overflow-y: auto;
}

.view {
    display: none;
}

.view.active {
    display: block;
}

/* ========================================
   Scan View
   ======================================== */
.scan-container {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.scan-header {
    margin-bottom: var(--spacing-lg);
}

.scan-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.scan-header p {
    color: var(--text-secondary);
}

.qr-reader {
    width: 100%;
    max-width: 400px;
    margin: var(--spacing-md) auto;
    border-radius: 0.5rem;
    overflow: hidden;
    background: var(--border-color);
}

.scan-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}

.scan-manual {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.scan-manual p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

/* ========================================
   Search View
   ======================================== */
.search-container {
    max-width: 900px;
    margin: 0 auto;
}

.search-header {
    margin-bottom: var(--spacing-md);
}

.search-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.search-form {
    padding: var(--spacing-md);
    background: var(--surface-white);
    border-radius: 0.5rem;
    margin-bottom: var(--spacing-md);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.input-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.input-group input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
    font-size: 0.875rem;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.search-filters {
    display: flex;
    gap: var(--spacing-sm);
}

.search-filters select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
    font-size: 0.875rem;
    flex: 1;
    background: var(--surface-white);
}

.search-filters select:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.search-results {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

/* ========================================
   Equipment Cards
   ======================================== */
.equipment-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.equipment-card {
    background: var(--surface-white);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: var(--spacing-md);
    cursor: pointer;
    transition: box-shadow 0.2s, transform 0.2s;
}

.equipment-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.equipment-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.equipment-card-image {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 0.25rem;
    background: var(--background-light);
}

.equipment-card-info h3 {
    margin: 0 0 var(--spacing-xs) 0;
    font-size: 1rem;
    font-weight: 500;
}

.equipment-card-info .equipment-id {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.equipment-card-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

/* ========================================
   Status View
   ======================================== */
.status-container {
    max-width: 900px;
    margin: 0 auto;
}

.status-header {
    margin-bottom: var(--spacing-md);
}

.status-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.status-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.summary-card {
    background: var(--surface-white);
    padding: var(--spacing-md);
    border-radius: 0.5rem;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.summary-label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.summary-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-blue);
}

.status-filters {
    margin-bottom: var(--spacing-md);
}

.status-filters select {
    width: 100%;
    max-width: 300px;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
    font-size: 0.875rem;
    background: var(--surface-white);
}

.status-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.status-item {
    background: var(--surface-white);
    padding: var(--spacing-md);
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: box-shadow 0.2s;
}

.status-item:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.status-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.status-item-name {
    font-weight: 500;
}

.status-item-projects {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

/* ========================================
   Projects View
   ======================================== */
.projects-container {
    max-width: 900px;
    margin: 0 auto;
}

.projects-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.projects-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.projects-filters {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--surface-white);
    border-radius: 0.5rem;
}

.projects-filters select {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
    font-size: 0.875rem;
    background: var(--surface-white);
}

.checkbox {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: 0.875rem;
}

.checkbox input {
    cursor: pointer;
}

.projects-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background: var(--surface-white);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: var(--spacing-md);
    cursor: pointer;
    transition: box-shadow 0.2s;
}

.project-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.project-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.project-card-name {
    font-weight: 500;
}

.project-type-badge {
    display: inline-block;
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.project-type-badge.location { background: #e3f2fd; color: #1565c0; }
.project-type-badge.employee { background: #f3e5f5; color: #7b1fa2; }
.project-type-badge.project { background: #e8f5e9; color: #2e7d32; }
.project-type-badge.special { background: #fff3e0; color: #e65100; }

.project-card-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

/* ========================================
   Modal
   ======================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal.hidden {
    display: none;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
}

.modal-content {
    position: relative;
    background: var(--surface-white);
    border-radius: 0.5rem;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

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

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.btn-close {
    width: 32px;
    height: 32px;
    padding: 0;
    border: none;
    background: transparent;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: 50%;
    transition: background 0.2s;
}

.btn-close:hover {
    background: var(--background-light);
}

.modal-body {
    padding: var(--spacing-lg);
}

/* ========================================
   Quick Actions
   ======================================== */
.quick-actions {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md) 0;
    background: var(--background-light);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
}

.quick-actions button {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
}

.quick-actions button svg {
    width: 18px;
    height: 18px;
}

.equipment-info {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.equipment-image img {
    width: 150px;
    height: 150px;
    object-fit: cover;
    border-radius: 0.5rem;
    background: var(--background-light);
}

.equipment-details {
    flex: 1;
}

.detail-row {
    display: flex;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.detail-row:last-child {
    border-bottom: none;
}

.detail-label {
    width: 100px;
    font-weight: 500;
    color: var(--text-secondary);
}

.detail-value {
    flex: 1;
}

/* ========================================
   Badges
   ======================================== */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.badge.active { background: var(--success-light); color: var(--success-green); }
.badge.written_off { background: #cfd8dc; color: #546e7a; }
.badge.lost { background: var(--error-light); color: var(--error-red); }
.badge.for_sale { background: var(--warning-light); color: #f57f17; }

/* ========================================
   Specifications
   ======================================== */
.specs-section {
    margin-bottom: var(--spacing-lg);
}

.specs-section h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.specs-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.spec-item {
    display: flex;
    padding: var(--spacing-sm);
    background: var(--background-light);
    border-radius: 0.25rem;
}

.spec-label {
    font-weight: 500;
    color: var(--text-secondary);
    margin-right: var(--spacing-sm);
}

.spec-value {
    flex: 1;
}

/* ========================================
   Current Status Section
   ======================================== */
.current-status-section {
    margin-bottom: var(--spacing-lg);
}

.current-status-section h3,
.history-section h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

/* ========================================
   Transaction History
   ======================================== */
.history-section {
    margin-bottom: var(--spacing-lg);
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.history-item {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--background-light);
    border-radius: 0.25rem;
    border-left: 3px solid var(--primary-blue);
}

.history-item.issue { border-left-color: var(--warning-orange); }
.history-item.return { border-left-color: var(--success-green); }

.history-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
}

.history-type {
    font-weight: 500;
}

.history-date {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.history-details {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ========================================
   Status Change Section
   ======================================== */
.status-change-section {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--background-light);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
}

.status-change-section h3 {
    margin: 0 0 1rem 0;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.status-change-section .form-control {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
    background: var(--surface-white);
    font-size: 0.875rem;
}

.status-change-section .form-control:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 2px rgba(25, 118, 210, 0.2);
}

.status-change-section .form-group {
    margin-bottom: 1rem;
}

.status-change-section .form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.status-change-section button {
    width: 100%;
}

/* ========================================
   Modal Actions
   ======================================== */
.modal-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.action-section h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.action-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: 0.25rem;
    font-size: 0.875rem;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-blue);
}

.form-group textarea {
    resize: vertical;
    min-height: 60px;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: 0.25rem;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: background 0.2s;
}

.btn-primary {
    background: var(--primary-blue);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--secondary-gray);
    color: white;
}

.btn-secondary:hover {
    background: #616161;
}

.btn-success {
    background: var(--success-green);
    color: white;
}

.btn-success:hover {
    background: #2e7d32;
}

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

.btn-danger:hover {
    background: #c62828;
}

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

/* ========================================
   Loading Spinner
   ======================================== */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--background-light);
    border-top: 3px solid var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: var(--spacing-xl) auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ========================================
   Notification/Toast
   ======================================== */
.footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-md);
    pointer-events: none;
}

.notification {
    position: relative;
    z-index: 2000;
    max-width: 400px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    background: #323232;
    color: white;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    text-align: center;
    animation: slideUp 0.3s ease;
    pointer-events: auto;
}

.notification.hidden {
    display: none;
}

.notification.success { background: var(--success-green); }
.notification.error { background: var(--error-red); }
.notification.warning { background: var(--warning-orange); }

@keyframes slideUp {
    from { transform: translateY(100%); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* ========================================
   Utility Classes
   ======================================== */
.hidden { display: none !important; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }

.text-center { text-align: center; }
.text-sm { font-size: 0.75rem; }
.text-muted { color: var(--text-secondary); }

.text-success { color: var(--success-green); }
.text-error { color: var(--error-red); }
.text-warning { color: var(--warning-orange); }

/* ========================================
   Responsive Design
   ======================================== */
@media (min-width: var(--bp-tablet)) {
    .main-content {
        padding: var(--spacing-lg);
    }

    .search-results {
        grid-template-columns: repeat(2, 1fr);
    }

    .equipment-list {
        grid-template-columns: repeat(2, 1fr);
    }

    .status-summary {
        grid-template-columns: repeat(3, 1fr);
    }

    .specs-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .modal-content {
        width: 80%;
    }
}

@media (min-width: var(--bp-desktop)) {
    .main-content {
        max-width: 1200px;
        margin: 0 auto;
    }

    .search-results {
        grid-template-columns: repeat(3, 1fr);
    }

    .equipment-list {
        grid-template-columns: repeat(3, 1fr);
    }

    .projects-list {
        grid-template-columns: repeat(3, 1fr);
    }

    .modal-content {
        width: 70%;
    }
}

@media (max-width: var(--bp-mobile)) {
    .header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .logo h1 {
        font-size: 1rem;
    }

    .nav {
        padding: var(--spacing-xs) var(--spacing-sm);
    }

    .nav-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.75rem;
    }

    .nav-btn span {
        display: none;
    }

    .status-summary {
        grid-template-columns: 1fr;
    }

    .equipment-info {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .modal-actions {
        grid-template-columns: 1fr;
    }

    .specs-grid {
        grid-template-columns: 1fr;
    }
}