/* Global Reset & Styling Variables */
:root {
    --color-bg: #fcfbfa; /* Warm off-white */
    --color-surface: #ffffff;
    --color-text: #1e2530; /* Dark warm charcoal */
    --color-text-muted: #626e82;
    --color-border: #e8e6e2;
    
    /* Warm Terracotta / Amber Accent System */
    --color-primary: #d96b27;
    --color-primary-hover: #b85418;
    --color-primary-light: #fdf5f0;
    
    /* States */
    --color-success: #16a34a;
    --color-success-bg: #f0fdf4;
    --color-warning: #d97706;
    --color-warning-bg: #fef3c7;
    --color-danger: #dc2626;
    --color-danger-bg: #fef2f2;
    --color-info: #2563eb;
    --color-info-bg: #eff6ff;
    --color-muted: #64748b;
    --color-muted-bg: #f8fafc;
    
    /* Transitions & Shadows */
    --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.06), 0 4px 6px -2px rgba(0,0,0,0.03);
    
    /* Font stacks */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header & Navigation */
.app-header {
    background-color: #1a1512; /* Dark chocolate/slate */
    color: #ffffff;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: #ffffff;
    font-weight: 700;
    font-size: 1.25rem;
    transition: var(--transition-smooth);
}

.brand-link:hover {
    opacity: 0.95;
    transform: translateY(-1px);
}

.brand-icon {
    font-size: 1.5rem;
}

.top-nav {
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    color: #cbd5e1;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition-smooth);
}

.nav-link:hover {
    color: #ffffff;
    background-color: rgba(255,255,255,0.08);
}

.nav-link.active {
    color: #ffffff;
    background-color: var(--color-primary);
}

.nav-user {
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.5rem 0.25rem;
}

/* Main Layout */
.main-content {
    flex: 1;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
}

/* Footer */
.app-footer {
    background-color: #1a1512;
    color: #94a3b8;
    border-top: 1px solid rgba(255,255,255,0.05);
    padding: 1.5rem;
    text-align: center;
    font-size: 0.85rem;
    margin-top: 4rem;
}

/* Cards & Layout Containers */
.card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 2rem;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border);
    background-color: rgba(0,0,0,0.01);
}

.card-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.subtitle {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.card-body {
    padding: 1.5rem;
}

.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

/* Forms & Inputs */
.form-group {
    margin-bottom: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.form-group label.required-label::after {
    content: " *";
    color: var(--color-danger);
}

.form-control {
    width: 100%;
    padding: 0.65rem 0.85rem;
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--color-text);
    background-color: #ffffff;
    border: 1px solid #c8c5c0;
    border-radius: 6px;
    transition: var(--transition-smooth);
    outline: none;
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(217, 107, 39, 0.15);
}

.form-control::placeholder {
    color: #a8a29e;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.2rem;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: 6px;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-smooth);
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: #ffffff;
    border-color: var(--color-border);
    color: var(--color-text);
}

.btn-secondary:hover {
    background-color: #f5f4f0;
    border-color: #c8c5c0;
}

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

.btn-tertiary:hover {
    background-color: #fbece3;
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 0.8rem 1.75rem;
    font-size: 1.05rem;
}

/* Flash Messages */
.flash-container {
    margin-bottom: 2rem;
}

.flash-message {
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    animation: slideInDown 0.3s ease-out;
}

.flash-message.error {
    background-color: var(--color-danger-bg);
    border: 1px solid #fecaca;
    color: var(--color-danger);
}

.flash-message.success {
    background-color: var(--color-success-bg);
    border: 1px solid #bbf7d0;
    color: var(--color-success);
}

.flash-close {
    background: none;
    border: none;
    color: inherit;
    font-size: 1.25rem;
    cursor: pointer;
    line-height: 1;
}

/* Upload Styling */
.upload-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.file-drop-area {
    border: 2px dashed #c8c5c0;
    border-radius: 8px;
    padding: 2.5rem;
    text-align: center;
    position: relative;
    cursor: pointer;
    transition: var(--transition-smooth);
    background-color: rgba(0,0,0,0.005);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.file-drop-area:hover, .file-drop-area.has-file {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.file-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.file-icon {
    font-size: 2.5rem;
}

.file-msg {
    font-size: 1.05rem;
    font-weight: 500;
}

.file-name-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.btn-upload {
    align-self: center;
    width: 100%;
    max-width: 250px;
}

/* Tables & Lists */
.table-responsive {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.95rem;
}

.data-table th, .data-table td {
    padding: 0.9rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
}

.data-table th {
    background-color: #f5f4f0;
    font-weight: 600;
    color: var(--color-text);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.data-table tbody tr:hover {
    background-color: rgba(217, 107, 39, 0.015);
}

.table-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
}

.vendor-name-col {
    display: flex;
    flex-direction: column;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 30px;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.badge-light {
    background-color: #f1f5f9;
    color: #475569;
}

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

.badge-success {
    background-color: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid #bbf7d0;
}

.badge-warning {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
    border: 1px solid #fde68a;
}

.badge-danger {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
    border: 1px solid #fecaca;
}

.badge-info {
    background-color: var(--color-info-bg);
    color: var(--color-info);
    border: 1px solid #bfdbfe;
}

/* Auth */
.auth-page {
    min-height: calc(100vh - 220px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-card {
    width: 100%;
    max-width: 430px;
}

.auth-card .card-header h1 {
    font-size: 1.5rem;
}

.auth-submit {
    width: 100%;
}

.auth-secondary {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 1rem;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.auth-secondary a {
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
}

.otp-input {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    letter-spacing: 0;
    text-align: center;
}

.checkbox-line {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0 0 1.25rem;
    font-weight: 600;
}

.inline-form {
    display: inline;
}

.category-badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    font-size: 0.8rem;
    background-color: #f1f5f9;
    border-radius: 4px;
    color: #475569;
}

/* Empty States */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.7;
}

.empty-state h3 {
    font-size: 1.15rem;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.empty-state p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* Two-column Review Screen */
.review-container {
    max-width: 1600px;
    margin: 0 auto;
}

.review-header {
    margin-bottom: 1.5rem;
}

.back-link {
    display: inline-block;
    text-decoration: none;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
    transition: var(--transition-smooth);
}

.back-link:hover {
    color: var(--color-primary-hover);
    transform: translateX(-2px);
}

.review-grid {
    display: grid;
    grid-template-columns: minmax(400px, 45%) 1fr;
    gap: 1.5rem;
    align-items: start;
}

.preview-column {
    position: sticky;
    top: 75px;
}

.doc-viewer {
    width: 100%;
    height: calc(100vh - 220px);
    min-height: 550px;
    border: none;
    border-radius: 8px;
    background-color: #ebeae6;
}

.img-viewer-container {
    width: 100%;
    height: calc(100vh - 220px);
    min-height: 550px;
    overflow: auto;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    background-color: #ebeae6;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 1rem;
}

.doc-image {
    max-width: 100%;
    height: auto;
    box-shadow: var(--shadow-md);
    border-radius: 4px;
}

.fallback-note {
    text-align: center;
    padding: 4rem 2rem;
    background-color: #f1f5f9;
    border-radius: 8px;
}

.note-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.new-vendor-box {
    background-color: var(--color-muted-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1.25rem;
}

.box-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}

.header-fields-grid {
    display: flex;
    flex-direction: column;
}

.lines-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.tally-shortcut-link {
    font-size: 0.9rem;
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.tally-shortcut-link:hover {
    text-decoration: underline;
}

.lines-scroll-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 1rem;
}

/* Individual Line Row Card */
.line-row-card {
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1.25rem;
    background-color: #ffffff;
    box-shadow: 0 1px 2px rgba(0,0,0,0.02);
    transition: var(--transition-smooth);
}

.line-row-card:hover {
    border-color: #c8c5c0;
    box-shadow: var(--shadow-sm);
}

.line-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.75rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.line-number {
    font-weight: 700;
    color: var(--color-text);
}

.line-badges {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.line-grid-main {
    display: grid;
    grid-template-columns: 1fr 1fr 1.2fr;
    gap: 1.25rem;
}

.line-col {
    display: flex;
    flex-direction: column;
}

.highlight-col {
    background-color: #fdfaf7;
    border: 1px solid #f5ebd6;
    border-radius: 6px;
    padding: 0.75rem;
    justify-content: space-between;
}

.landed-cost-display {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    border-top: 1px dashed #eedfc2;
    padding-top: 0.75rem;
    margin-top: 0.5rem;
}

.landed-cost-display strong {
    font-size: 1.05rem;
    color: var(--color-text);
}

.math-fields-col {
    background-color: #fbfbfc;
    border: 1px solid #eef0f3;
    border-radius: 6px;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-row-nested {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 0.5rem;
}

.form-row-nested .double-width {
    grid-column: span 2;
}

.form-row-nested .form-group {
    margin-bottom: 0;
}

.form-row-nested label {
    font-size: 0.75rem;
    margin-bottom: 0.15rem;
}

.form-row-nested .form-control {
    padding: 0.4rem 0.6rem;
    font-size: 0.85rem;
}

.price-signal-badge {
    display: inline-block;
    padding: 0.25rem 0.65rem;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 4px;
}

.price-signal-badge.up {
    background-color: var(--color-danger-bg);
    color: var(--color-danger);
}

.price-signal-badge.down {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.price-signal-badge.same {
    background-color: #f1f5f9;
    color: #475569;
}

.price-signal-badge.new, .price-signal-badge.none {
    background-color: #f8fafc;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}

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

/* Tally Copy Screen */
.tally-header-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.alert-info {
    background-color: var(--color-info-bg);
    border: 1px solid #bfdbfe;
    color: var(--color-info);
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.alert-icon {
    font-size: 1.25rem;
    line-height: 1;
}

.tally-field-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
}

.tally-field-box {
    background-color: #fbfbfc;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.field-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.field-value-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
}

.tally-value {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

code.tally-value {
    font-family: var(--font-mono);
    background-color: #f1f5f9;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-size: 0.95rem;
}

.btn-copy {
    background-color: #ffffff;
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-copy:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.btn-copy.copied {
    background-color: var(--color-success);
    color: #ffffff;
    border-color: var(--color-success);
}

.cell-copy-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    min-height: 1.75rem;
}

.cell-copy-wrapper.justify-right {
    justify-content: flex-end;
}

.cell-copy-wrapper .copy-target {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.font-mono {
    font-family: var(--font-mono);
}

.btn-copy-sm {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0.15rem 0.3rem;
    border-radius: 4px;
    opacity: 0.35;
    transition: var(--transition-smooth);
}

.btn-copy-sm:hover, tr:hover .btn-copy-sm {
    opacity: 1;
    background-color: #f1f5f9;
}

/* Animations */
@keyframes slideInDown {
    from {
        transform: translateY(-10px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
    .review-grid {
        grid-template-columns: 1fr;
    }
    
    .preview-column {
        position: relative;
        top: 0;
    }
    
    .doc-viewer, .img-viewer-container {
        height: 450px;
        min-height: auto;
    }
}

@media (max-width: 768px) {
    .main-content {
        padding: 1.5rem 1rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }
    
    .line-grid-main {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .highlight-col {
        flex-direction: row;
        align-items: center;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .landed-cost-display {
        border-top: none;
        border-left: 1px dashed #eedfc2;
        padding-top: 0;
        padding-left: 0.75rem;
        margin-top: 0;
    }
    
    .nav-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .top-nav {
        justify-content: space-around;
    }
}

@media (max-width: 480px) {
    .page-header h1 {
        font-size: 1.5rem;
    }
    
    .card-header, .card-body {
        padding: 1rem;
    }
    
    .top-nav {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .nav-link {
        text-align: center;
    }
    
    .btn {
        width: 100%;
    }
    
    .submit-bar {
        flex-direction: column;
    }
}