:root {
    --primary-color: #00b764;
    --secondary-color: #00203f;
    --accent-color: #ff6f61;
    --text-color: #2d3436;
    --bg-color: #f8faff;
    --sidebar-bg-color: white;
    --border-color: #e0e4f1;
    --highlight-color: #f0fff4;
    --transition-speed: 0.3s;
    --border-radius: 12px;
    --box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    --card-padding: 1.25rem;
    --grid-gap: 1rem;
}

/* Base styles - Mobile First */
body {
    font-family: 'DM Sans', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 14px;
    padding-top: calc(var(--nav-height) + 1rem); /* Add padding for navbar */
}

.container-fluid {
    padding: 1rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* Header Section */
.section-header {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding: 0.5rem 0;
    position: sticky; /* Make header sticky */
    top: var(--nav-height); /* Position below navbar */
    background: var(--bg-color);
    z-index: 99;
}

.section-title {
    color: var(--secondary-color);
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-title i {
    color: var(--primary-color);
    font-size: 1.25rem;
}

/* Search Box */
.search-box {
    position: relative;
    width: 100%;
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: #6c757d;
    pointer-events: none;
    font-size: 0.9rem;
}

.search-box .form-control {
    padding: 0.75rem 0.75rem 0.75rem 2.25rem;
    border-radius: var(--border-radius);
    border: 2px solid var(--border-color);
    width: 100%;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    height: 42px;
}

.search-box .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 183, 100, 0.1);
}

/* Grid Layout */
.applications-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--grid-gap);
    padding: 0;
    margin: 0;
}

/* Card Styles */
.application-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: var(--card-padding);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border-color);
    margin: 0;
}

.application-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
    border-color: var(--primary-color);
}

.application-header {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.application-id {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.9rem;
}

.application-date {
    color: #6c757d;
    font-size: 0.8rem;
}

.application-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    line-height: 1.3;
}

/* Details Section */
.application-details {
    background: var(--bg-color);
    border-radius: calc(var(--border-radius) - 4px);
    padding: 1rem;
    margin-top: auto;
    border: 1px solid var(--border-color);
}

.detail-row {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
}

.detail-row:last-child {
    margin-bottom: 0;
}

.detail-label {
    color: #6c757d;
    font-weight: 500;
}

.detail-value {
    color: var(--secondary-color);
    word-break: break-word;
}

/* Loading State */
.loading-spinner {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
    width: 100%;
}

.spinner-border {
    color: var(--primary-color);
    width: 2.5rem;
    height: 2.5rem;
}

/* Tablet Styles */
@media (min-width: 576px) {
    body {
        font-size: 15px;
        padding-top: calc(var(--nav-height) + 1.5rem);
    }

    .container-fluid {
        padding: 1.5rem;
    }

    .section-header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        gap: 1.5rem;
    }

    .search-box {
        max-width: 300px;
    }

    .applications-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 1.25rem;
        padding: 0.5rem;
    }

    .application-header {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
    }

    .detail-row {
        flex-direction: row;
        justify-content: space-between;
        align-items: baseline;
    }

    .application-name {
        font-size: 1.2rem;
    }
}

/* Desktop Styles */
@media (min-width: 992px) {
    body {
        font-size: 16px;
        padding-top: calc(var(--nav-height) + 2rem);
    }

    .container-fluid {
        padding: 2rem;
    }

    :root {
        --card-padding: 1.5rem;
        --grid-gap: 1.5rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .search-box {
        max-width: 400px;
    }

    .applications-grid {
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    }

    .application-name {
        font-size: 1.25rem;
    }

    .application-details {
        padding: 1.25rem;
    }
}

/* Large Desktop Styles */
@media (min-width: 1200px) {
    .applications-grid {
        grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    }

    .search-box {
        max-width: 450px;
    }
}

/* Print Styles */
@media print {
    .applications-grid {
        display: block;
    }

    .application-card {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
        margin-bottom: 1rem;
    }

    .search-box {
        display: none;
    }
}

/* Preview Modal Styles */
.preview-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 1000;
    overflow-y: auto;
    padding: 1rem;
}

.preview-content {
    background: white;
    width: 100%;
    max-width: 900px;
    margin: 1rem auto;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    position: relative;
    animation: modalFadeIn 0.3s ease-out;
    border: 1px solid var(--border-color);
}

.preview-header {
    padding: var(--card-padding);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    background: white;
    z-index: 2;
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.preview-header h3 {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    color: var(--secondary-color);
    margin: 0;
    font-weight: 600;
}

.btn-close-preview {
    background: none;
    border: none;
    color: #6c757d;
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
    font-size: 1.25rem;
}

.btn-close-preview:hover {
    background: var(--bg-color);
    color: var(--primary-color);
}

.preview-body {
    padding: var(--card-padding);
    overflow-y: auto;
}

.preview-body .row {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: clamp(1rem, 2vw, 1.5rem);
    margin-bottom: 2rem;
}

.preview-body .col-md-6 {
    grid-column: span 12;
}

@media (min-width: 768px) {
    .preview-body .col-md-6 {
        grid-column: span 6;
    }
}

.preview-body h4 {
    color: var(--secondary-color);
    font-size: clamp(1.1rem, 1.5vw, 1.25rem);
    margin-bottom: 1rem;
    font-weight: 600;
}

.preview-body .table {
    width: 100%;
    margin-bottom: 0;
    border-collapse: collapse;
}

.preview-body .table th,
.preview-body .table td {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
    font-size: clamp(0.9rem, 1vw, 1rem);
}

.preview-body .table th {
    font-weight: 500;
    color: #6c757d;
    width: 40%;
}

.preview-body .table td {
    color: var(--secondary-color);
}

.preview-actions {
    padding: var(--card-padding);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    position: sticky;
    bottom: 0;
    background: white;
    border-radius: 0 0 var(--border-radius) var(--border-radius);
}

.preview-actions .btn {
    padding: 0.75rem 1.5rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: clamp(0.9rem, 1vw, 1rem);
    border-radius: calc(var(--border-radius) - 4px);
    min-width: 120px;
    justify-content: center;
}

/* Responsive Adjustments for Preview Modal */
@media (max-width: 768px) {
    .preview-modal {
        padding: 0;
    }

    .preview-content {
        margin: 0;
        min-height: 100%;
        border-radius: 0;
    }

    .preview-header {
        padding: 1rem;
    }

    .preview-body {
        padding: 1rem;
    }

    .preview-body .table th,
    .preview-body .table td {
        display: block;
        width: 100%;
        padding: 0.5rem 0;
    }

    .preview-body .table th {
        border-bottom: none;
        padding-bottom: 0;
    }

    .preview-body .table td {
        padding-top: 0.25rem;
    }

    .preview-actions {
        padding: 1rem;
        flex-direction: column;
        gap: 0.5rem;
    }

    .preview-actions .btn {
        width: 100%;
    }
}

/* Animation */
@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}