/**
 * Machine Maintenance System - Main Stylesheet
 * Mobile-First Responsive Design
 */

:root {
    --primary-color: #2c3e50;
    --secondary-color: #e74c3c;
    --success-color: #27ae60;
    --info-color: #3498db;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --light-bg: #ecf0f1;
    --dark-text: #2c3e50;
    --border-color: #bdc3c7;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

html, body {
    height: 100%;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-bg);
    color: var(--dark-text);
}

body {
    display: flex;
    flex-direction: column;
}

/* =====================================================
   HEADER STYLES
   ===================================================== */

.navbar {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    gap: 1rem;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand img {
    height: 40px;
    width: 40px;
}

.navbar-menu {
    display: none;
    flex-direction: column;
    gap: 1rem;
    position: absolute;
    top: 70px;
    right: 1rem;
    background-color: var(--primary-color);
    padding: 1rem;
    border-radius: 4px;
    min-width: 200px;
    box-shadow: var(--shadow);
}

.navbar-menu.active {
    display: flex;
}

.navbar-menu a,
.navbar-menu button {
    color: white;
    text-decoration: none;
    padding: 0.5rem 0;
    border: none;
    background: none;
    cursor: pointer;
    text-align: left;
}

.navbar-menu a:hover,
.navbar-menu button:hover {
    color: var(--warning-color);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: white;
    border-radius: 2px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-info span {
    display: none;
}

/* =====================================================
   MAIN CONTAINER
   ===================================================== */

main {
    flex: 1;
    display: flex;
    padding: 1rem;
    gap: 1rem;
    overflow-y: auto;
}

.sidebar {
    display: none;
    width: 250px;
    background-color: white;
    border-radius: 4px;
    box-shadow: var(--shadow);
    overflow-y: auto;
}

.sidebar.active {
    display: block;
}

.sidebar-menu {
    list-style: none;
}

.sidebar-menu li {
    border-bottom: 1px solid var(--border-color);
}

.sidebar-menu a {
    display: block;
    padding: 1rem;
    color: var(--dark-text);
    text-decoration: none;
    transition: all 0.3s;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background-color: var(--primary-color);
    color: white;
    padding-left: 1.5rem;
}

.content {
    flex: 1;
    background-color: white;
    border-radius: 4px;
    box-shadow: var(--shadow);
    padding: 1.5rem;
    min-height: 600px;
}

/* =====================================================
   FORM STYLES
   ===================================================== */

.form-group {
    margin-bottom: 1.5rem;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(44, 62, 80, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* =====================================================
   BUTTON STYLES
   ===================================================== */

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    font-weight: 500;
}

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

.btn-primary:hover {
    background-color: #1a252f;
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

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

.btn-success:hover {
    background-color: #1f8e4d;
}

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

.btn-danger:hover {
    background-color: #c0392b;
}

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

.btn-warning:hover {
    background-color: #d68910;
}

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

.btn-info:hover {
    background-color: #2980b9;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
    margin-bottom: 0.5rem;
}

.btn-group {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* =====================================================
   TABLE STYLES
   ===================================================== */

.table-responsive {
    overflow-x: auto;
    margin: 1rem 0;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

.table thead {
    background-color: var(--primary-color);
    color: white;
}

.table th,
.table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table tbody tr:hover {
    background-color: var(--light-bg);
}

.table tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}

/* =====================================================
   CARD STYLES
   ===================================================== */

.card {
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem;
    font-weight: 500;
}

.card-body {
    padding: 1rem;
}

.card-footer {
    background-color: var(--light-bg);
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

.card-title {
    margin: 0 0 1rem 0;
    font-size: 1.25rem;
}

/* =====================================================
   DASHBOARD GRID
   ===================================================== */

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.dashboard-card {
    background-color: white;
    border-radius: 4px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    text-align: center;
}

.dashboard-card h3 {
    font-size: 0.875rem;
    color: #7f8c8d;
    margin-bottom: 1rem;
    text-transform: uppercase;
    font-weight: 500;
}

.dashboard-card .stat-value {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
}

.dashboard-card.danger .stat-value {
    color: var(--danger-color);
}

.dashboard-card.warning .stat-value {
    color: var(--warning-color);
}

.dashboard-card.success .stat-value {
    color: var(--success-color);
}

/* =====================================================
   BADGE STYLES
   ===================================================== */

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
}

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

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

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

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

.badge-secondary {
    background-color: #95a5a6;
    color: white;
}

/* =====================================================
   ALERT STYLES
   ===================================================== */

.alert {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 4px;
    border-left: 4px solid;
}

.alert-success {
    background-color: #d4edda;
    border-color: var(--success-color);
    color: #155724;
}

.alert-danger {
    background-color: #f8d7da;
    border-color: var(--danger-color);
    color: #721c24;
}

.alert-warning {
    background-color: #fff3cd;
    border-color: var(--warning-color);
    color: #856404;
}

.alert-info {
    background-color: #d1ecf1;
    border-color: var(--info-color);
    color: #0c5460;
}

/* =====================================================
   MODAL STYLES
   ===================================================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: white;
    border-radius: 4px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 5px 30px rgba(0, 0, 0, 0.3);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 500;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #7f8c8d;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* =====================================================
   LOADING & SPINNER
   ===================================================== */

.spinner {
    border: 4px solid var(--light-bg);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 0.8s linear infinite;
    margin: 2rem auto;
}

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

.loading {
    text-align: center;
    padding: 2rem;
}

/* =====================================================
   RESPONSIVE DESIGN
   ===================================================== */

@media (min-width: 768px) {
    .hamburger {
        display: none;
    }

    .sidebar {
        display: block;
    }

    .navbar-menu {
        position: static;
        flex-direction: row;
        background-color: transparent;
        padding: 0;
        box-shadow: none;
        min-width: auto;
        gap: 0.5rem;
    }

    .navbar-menu a {
        padding: 0.5rem 1rem;
    }

    .user-info span {
        display: inline;
    }

    main {
        gap: 1.5rem;
    }

    .dashboard-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .table {
        font-size: 0.95rem;
    }

    .table th,
    .table td {
        padding: 0.75rem;
    }
}

@media (max-width: 767px) {
    .hamburger {
        display: flex;
    }

    main {
        flex-direction: column;
        padding: 0.5rem;
    }

    .sidebar {
        order: -1;
        width: 100%;
    }

    .content {
        padding: 1rem;
    }

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

    .btn-group {
        flex-direction: column;
    }

    .btn-block {
        width: 100%;
    }

    .table {
        font-size: 0.85rem;
    }

    .table th,
    .table td {
        padding: 0.5rem;
    }

    .modal-content {
        width: 95%;
    }

    .navbar {
        flex-wrap: wrap;
    }

    .navbar-brand {
        font-size: 1.25rem;
    }

    .table-responsive {
        margin: 0.5rem 0;
    }
}

@media (max-width: 480px) {
    .navbar-brand {
        font-size: 1rem;
    }

    .navbar-brand img {
        height: 30px;
        width: 30px;
    }

    .content {
        padding: 0.75rem;
    }

    .dashboard-card {
        padding: 1rem;
    }

    .dashboard-card .stat-value {
        font-size: 1.5rem;
    }

    .btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 0.6rem;
        font-size: 16px; /* Prevents zoom on iOS */
    }
}

/* =====================================================
   UTILITY CLASSES
   ===================================================== */

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

.hidden {
    display: none !important;
}

.d-flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.align-center {
    align-items: center;
}

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }

.text-muted {
    color: #7f8c8d;
}

.text-success {
    color: var(--success-color);
}

.text-danger {
    color: var(--danger-color);
}

.text-warning {
    color: var(--warning-color);
}

.border-top {
    border-top: 1px solid var(--border-color);
}

.border-bottom {
    border-bottom: 1px solid var(--border-color);
}

.rounded {
    border-radius: 4px;
}

.shadow {
    box-shadow: var(--shadow);
}

/* =====================================================
   PRINT STYLES
   ===================================================== */

@media print {
    .navbar,
    .sidebar,
    .btn,
    .modal {
        display: none !important;
    }

    main {
        padding: 0;
    }

    .content {
        box-shadow: none;
        padding: 0;
    }

    body {
        background-color: white;
    }
}