:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --accent-hover: #2563eb;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --border-color: #334155;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(to right, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

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

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

/* Document List */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.doc-card {
    background-color: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.doc-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border-color: var(--accent-color);
}

.doc-status {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.status-uploaded {
    background-color: #334155;
    color: #cbd5e1;
}

.status-processed {
    background-color: #0f766e;
    color: #5eead4;
}

.status-verified {
    background-color: #065f46;
    color: #34d399;
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 1.5rem;
    padding: 4rem 2rem;
    text-align: center;
    background-color: rgba(30, 41, 59, 0.3);
    transition: border-color 0.3s, background-color 0.3s;
    cursor: pointer;
    margin-bottom: 2rem;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--accent-color);
    background-color: rgba(59, 130, 246, 0.1);
}

.loader {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 1rem auto;
}

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

    100% {
        transform: rotate(360deg);
    }
}

/* Split View for Editing */
.split-view {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    height: calc(100vh - 150px);
}

.viewer-pane,
.editor-pane {
    background-color: var(--card-bg);
    border-radius: 1rem;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100%;
}

.pane-header {
    padding: 1rem;
    background-color: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.pane-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

iframe {
    width: 100%;
    height: 100%;
    border: none;
}

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

label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

input,
select,
textarea {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    color: white;
    font-size: 1rem;
    transition: border-color 0.2s;
}

input:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* Data Table */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.data-table th,
.data-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.875rem;
}

.data-table input {
    background: transparent;
    border: none;
    padding: 0.25rem;
}

.data-table input:focus {
    background: var(--bg-color);
    border-radius: 0.25rem;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    /* Header */
    header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
        margin-bottom: 2rem;
    }

    header .btn {
        width: 100%;
        text-align: center;
    }

    /* Grid */
    .card-grid {
        grid-template-columns: 1fr;
    }

    /* Split View Stacked */
    .split-view {
        grid-template-columns: 1fr;
        grid-template-rows: 400px auto;
        height: auto;
    }

    .viewer-pane {
        height: 400px;
    }

    .editor-pane {
        height: auto;
    }

    /* Input Forms */
    .form-group {
        margin-bottom: 1rem;
    }

    #doc-form>div {
        grid-template-columns: 1fr !important;
    }

    /* Data Table - Horizontal Scroll */
    .pane-content {
        overflow-x: hidden;
    }

    .data-table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
    }

    .data-table th,
    .data-table td {
        min-width: 100px;
    }

    .data-table input {
        min-width: 80px;
    }

    .data-table th:first-child,
    .data-table td:first-child {
        min-width: 150px;
        position: sticky;
        left: 0;
        background: var(--card-bg);
        z-index: 10;
        border-right: 1px solid var(--border-color);
    }
}

/* New Responsive Classes Refactor */
.header-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.doc-container {
    height: 100%;
    background: #000;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

/* Totals Section */
.totals-grid {
    margin-top: 2rem;
    display: grid;
    justify-content: end;
    gap: 0.5rem;
}

.total-row {
    display: flex;
    justify-content: space-between;
    width: 250px;
    align-items: center;
}

.total-row input {
    width: 120px;
    text-align: right;
}

.font-bold {
    font-weight: 700;
}

/* Mobile adjustments for new classes */
@media (max-width: 768px) {
    .header-group {
        width: 100%;
        justify-content: space-between;
    }

    .form-grid {
        grid-template-columns: 1fr !important;
    }

    .totals-grid {
        width: 100%;
        justify-content: normal;
        /* Fill width */
    }

    .total-row {
        width: 100%;
    }

    .total-row input {
        width: 50%;
    }

    .doc-container {
        min-height: 400px;
    }
}