:root {
    font-family: 'Inter', system-ui, Avenir, Helvetica, Arial, sans-serif;
    line-height: 1.5;
    font-weight: 400;
    font-synthesis: none;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    color-scheme: light dark;

    /* Light Theme Palette (Default) */
    --bg-app: #f8fafc;
    --bg-card: #ffffff;
    --bg-input: #f1f5f9;
    --primary: #f9b233;
    --primary-hover: #e09b1f;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --success: #059669;
    --success-light: #d1fae5;
    --error: #dc2626;
    --error-light: #fee2e2;
    --radius: 12px;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-app: #0f172a;
        --bg-card: #1e293b;
        --bg-input: #334155;
        --text-main: #f8fafc;
        --text-muted: #94a3b8;
        --border-color: #334155;
        --success: #10b981;
        --success-light: rgba(6, 78, 59, 0.2);
        --error: #ef4444;
        --error-light: rgba(69, 10, 10, 0.2);
    }
}

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    display: flex;
    place-items: center;
    min-height: 100vh;
    background-color: var(--bg-app);
    color: var(--text-main);
    transition: background-color 0.3s ease, color 0.3s ease;
    background-image:
        radial-gradient(at 0% 0%, rgba(249, 178, 51, 0.08) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(249, 178, 51, 0.05) 0px, transparent 50%);
}

@media (prefers-color-scheme: dark) {
    body {
        background-image:
            radial-gradient(at 0% 0%, rgba(249, 178, 51, 0.15) 0px, transparent 50%),
            radial-gradient(at 100% 0%, rgba(15, 23, 42, 1) 0px, transparent 50%);
    }
}

button {
    cursor: pointer;
}

/* Container */
.app-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

/* Header */
.app-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
}

.logo-container img {
    height: 48px;
    width: auto;
}

.header-text h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0;
    color: var(--text-main);
    letter-spacing: -0.025em;
}

.header-text p {
    margin: 0.25rem 0 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Main Card */
.main-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    padding: 2.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    position: relative;
    overflow: hidden;
}

@media (prefers-color-scheme: dark) {
    .main-card {
        box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    }
}

/* Form Elements */
.form-group {
    margin-bottom: 2rem;
}

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.75rem;
}

.select-wrapper {
    position: relative;
}

.select-input {
    width: 100%;
    padding: 1rem;
    background-color: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-main);
    font-size: 1rem;
    appearance: none;
    transition: all 0.2s;
    cursor: pointer;
}

.select-input option {
    background-color: var(--bg-card);
    color: var(--text-main);
}

.select-input:hover {
    border-color: var(--text-muted);
}

.select-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(249, 178, 51, 0.1);
}

.select-chevron {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

/* File Upload */
.file-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 3rem 2rem;
    text-align: center;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
    cursor: pointer;
    background: var(--bg-input);
}

.file-upload-area:hover,
.file-upload-area.drag-active {
    border-color: var(--primary);
    background: rgba(249, 178, 51, 0.05);
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.upload-icon-wrapper {
    background: var(--bg-card);
    padding: 1rem;
    border-radius: 50%;
    color: var(--primary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    display: inline-flex;
}

.upload-text {
    font-weight: 600;
    color: var(--text-main);
}

.upload-subtext {
    color: var(--text-muted);
    font-size: 0.875rem;
}

.selected-file {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(249, 178, 51, 0.1);
    border-radius: 8px;
    color: var(--text-main);
    border: 1px solid rgba(249, 178, 51, 0.2);
}

/* Button */
.submit-btn {
    width: 100%;
    padding: 1.25rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 700;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    transition: all 0.2s;
    box-shadow: 0 4px 14px 0 rgba(249, 178, 51, 0.39);
}

.submit-btn:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(249, 178, 51, 0.23);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    filter: grayscale(0.5);
}

/* Success Message */
.success-message {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
    color: var(--success);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
    animation: fadeIn 0.2s ease-out;
}

@media (prefers-color-scheme: dark) {
    .modal-overlay {
        background: rgba(0, 0, 0, 0.85);
    }
}

/* Modal Content */
.modal-content {
    background: var(--bg-card);
    width: 100%;
    max-width: 1200px;
    height: 85vh;
    max-height: 800px;
    border-radius: 16px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    animation: scaleIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    overflow: hidden;
}

@media (prefers-color-scheme: dark) {
    .modal-content {
        background: #111827;
        box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    }
}

.modal-header {
    padding: 1.25rem 1.75rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-input);
    flex-shrink: 0;
}

@media (prefers-color-scheme: dark) {
    .modal-header {
        background: #1f2937;
    }
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    padding: 0.5rem;
    border-radius: 6px;
    transition: all 0.2s;
    cursor: pointer;
}

.close-btn:hover {
    background: var(--bg-app);
    color: var(--text-main);
}

/* Modal Body Split Layout */
.modal-body {
    flex: 1;
    overflow: hidden;
    padding: 0;
}

.modal-split-layout {
    display: flex;
    height: 100%;
    width: 100%;
}

.modal-column {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
}

.error-column {
    border-right: 1px solid var(--border-color);
    flex: 1.2;
    background: rgba(239, 68, 68, 0.03);
}

@media (prefers-color-scheme: dark) {
    .error-column {
        background: rgba(69, 10, 10, 0.08);
    }
}

.success-column {
    flex: 0.8;
    background: rgba(16, 185, 129, 0.03);
}

@media (prefers-color-scheme: dark) {
    .success-column {
        background: rgba(6, 78, 59, 0.08);
    }
}

.column-title {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    flex-shrink: 0;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid rgba(255, 255, 255, 0.05);
}

.scrollable-list {
    overflow-y: auto;
    flex: 1;
    padding-right: 0.5rem;
}

/* Scrollbar Styling */
.scrollable-list::-webkit-scrollbar,
.success-grid-compact::-webkit-scrollbar {
    width: 6px;
}

.scrollable-list::-webkit-scrollbar-track,
.success-grid-compact::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}

.scrollable-list::-webkit-scrollbar-thumb,
.success-grid-compact::-webkit-scrollbar-thumb {
    background: var(--bg-input);
    border-radius: 3px;
}

/* Success Grid Compact */
.success-grid-compact {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.5rem;
    overflow-y: auto;
    flex: 1;
    padding-right: 0.5rem;
    align-content: start;
}

.compact-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.75rem;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    height: 50px;
    transition: all 0.2s;
    border-left: 3px solid var(--success);
}

@media (prefers-color-scheme: dark) {
    .compact-card {
        background: var(--bg-app);
    }
}

.compact-card:hover {
    transform: translateY(-2px);
    border-color: var(--success);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
}

.compact-header {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-main);
    flex: 1;
}

.compact-stat {
    display: flex;
    align-items: baseline;
    gap: 0.35rem;
    flex-shrink: 0;
}

.compact-stat .stat-number {
    font-size: 1rem;
    font-weight: 700;
    color: var(--success);
}

.compact-stat .stat-label {
    font-size: 0.65rem;
    color: #64748b;
    text-transform: uppercase;
}

/* Error Card Detailed */
.result-card.error {
    background: var(--bg-card);
    border-left: 4px solid var(--error);
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
}

@media (prefers-color-scheme: dark) {
    .result-card.error {
        background: var(--bg-app);
    }
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.file-name {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-main);
}

.status-badge {
    font-size: 0.7rem;
    font-weight: 800;
    padding: 0.25rem 0.6rem;
    border-radius: 4px;
    text-transform: uppercase;
}

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

.error-details {
    margin-top: 0.75rem;
    background: var(--error-light);
    padding: 0.75rem;
    font-size: 0.8rem;
    color: var(--error);
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    line-height: 1.5;
    border: 1px solid var(--error);
}

@media (prefers-color-scheme: dark) {
    .error-details {
        background: rgba(0, 0, 0, 0.4);
        color: #fca5a5;
        border-color: rgba(239, 68, 68, 0.3);
    }
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    font-size: 0.9rem;
    gap: 0.75rem;
}

/* Utility Classes */
.flex { display: flex; }
.gap-4 { gap: 1rem; }
.text-xs { font-size: 0.75rem; }
.text-slate-400 { color: #94a3b8; }
.text-white { color: white; }
.text-red-400 { color: #f87171; }
.text-emerald-400 { color: #34d399; }
.text-slate-500 { color: #64748b; }
.mt-2 { margin-top: 0.5rem; }

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

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

.animate-spin {
    animation: spin 1s linear infinite;
}