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

:root {
    --charcoal: #1a1a2e;
    --deep-navy: #0f0f23;
    --steel: #2d2d44;
    --amber: #f59e0b;
    --amber-light: #fbbf24;
    --amber-glow: rgba(245, 158, 11, 0.15);
    --slate: #94a3b8;
    --white: #f1f5f9;
    --off-white: #e2e8f0;
    --red: #ef4444;
    --red-soft: rgba(239, 68, 68, 0.15);
    --green: #22c55e;
    --green-soft: rgba(34, 197, 94, 0.15);
    --blue: #3b82f6;
    --blue-soft: rgba(59, 130, 246, 0.15);
    --orange: #f97316;
    --orange-soft: rgba(249, 115, 22, 0.15);
}

body {
    font-family: 'DM Sans', sans-serif;
    background: var(--deep-navy);
    color: var(--white);
    overflow-x: hidden;
    min-height: 100vh;
}

h1, h2, h3, h4 {
    font-family: 'Space Grotesk', sans-serif;
}

/* Noise texture */
body::before {
    content: '';
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 0;
}

/* ===== TOP NAV ===== */
.topnav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(15, 15, 35, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    padding: 0 24px;
}

.topnav-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.topnav-brand {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--white);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.brand-icon {
    font-size: 1.4rem;
    color: var(--amber);
}

.topnav-links {
    display: flex;
    gap: 4px;
}

.nav-link {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--slate);
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.2s;
}

.nav-link:hover { color: var(--white); background: rgba(255,255,255,0.05); }
.nav-link.active { color: var(--amber); background: var(--amber-glow); }

/* ===== MAIN LAYOUT ===== */
main {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px 80px;
}

/* ===== PAGE HEADER ===== */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 16px;
}

.page-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.page-header h1 span { color: var(--amber); }

/* ===== STAT CARDS ===== */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.stat-card {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 12px;
    padding: 24px;
    transition: border-color 0.2s;
}

.stat-card:hover { border-color: rgba(245,158,11,0.3); }

.stat-card-label {
    font-size: 0.8rem;
    color: var(--slate);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.stat-card-value {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
}

.stat-card-sub {
    font-size: 0.8rem;
    color: var(--slate);
    margin-top: 4px;
}

.stat-card.danger .stat-card-value { color: var(--red); }
.stat-card.warning .stat-card-value { color: var(--orange); }
.stat-card.success .stat-card-value { color: var(--green); }
.stat-card.info .stat-card-value { color: var(--blue); }
.stat-card.amber .stat-card-value { color: var(--amber); }

/* ===== PANELS ===== */
.panel {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 12px;
    margin-bottom: 24px;
    overflow: hidden;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.panel-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.panel-body {
    padding: 0;
}

.panel-body.padded {
    padding: 24px;
}

/* ===== TWO COLUMN LAYOUT ===== */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

@media (max-width: 768px) {
    .two-col { grid-template-columns: 1fr; }
}

/* ===== TABLE ===== */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 12px 16px;
    text-align: left;
    font-size: 0.85rem;
    border-bottom: 1px solid rgba(255,255,255,0.04);
}

.data-table th {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    color: var(--slate);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    background: rgba(255,255,255,0.02);
    position: sticky;
    top: 60px;
}

.data-table th.sortable {
    cursor: pointer;
    user-select: none;
}

.data-table th.sortable:hover { color: var(--amber); }
.data-table th.sorted { color: var(--amber); }
.data-table th.sorted::after { content: ' \25B2'; font-size: 0.65rem; }
.data-table th.sorted.desc::after { content: ' \25BC'; }

.data-table tbody tr {
    transition: background 0.15s;
}

.data-table tbody tr:hover {
    background: rgba(245,158,11,0.05);
}

.data-table tbody tr.clickable {
    cursor: pointer;
}

/* ===== BADGES ===== */
.badge {
    display: inline-block;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-critical { background: var(--red-soft); color: var(--red); }
.badge-high { background: var(--orange-soft); color: var(--orange); }
.badge-medium { background: var(--blue-soft); color: var(--blue); }
.badge-low { background: var(--green-soft); color: var(--green); }
.badge-ok { background: var(--green-soft); color: var(--green); }
.badge-warning { background: var(--orange-soft); color: var(--orange); }
.badge-danger { background: var(--red-soft); color: var(--red); }

.badge-received { background: var(--green-soft); color: var(--green); }
.badge-sold { background: var(--blue-soft); color: var(--blue); }
.badge-adjustment { background: var(--orange-soft); color: var(--orange); }
.badge-return { background: rgba(168,85,247,0.15); color: #a855f7; }
.badge-damaged { background: var(--red-soft); color: var(--red); }
.badge-transfer { background: rgba(148,163,184,0.15); color: var(--slate); }

/* ===== STOCK BAR ===== */
.stock-bar {
    width: 80px;
    height: 6px;
    background: rgba(255,255,255,0.08);
    border-radius: 3px;
    overflow: hidden;
    display: inline-block;
    vertical-align: middle;
    margin-left: 8px;
}

.stock-bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s;
}

.stock-bar-fill.ok { background: var(--green); }
.stock-bar-fill.warning { background: var(--orange); }
.stock-bar-fill.danger { background: var(--red); }

/* ===== BUTTONS ===== */
.btn {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 8px 18px;
    border-radius: 6px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
}

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

.btn-secondary {
    background: transparent;
    color: var(--slate);
    border-color: rgba(255,255,255,0.12);
}
.btn-secondary:hover { color: var(--white); border-color: rgba(255,255,255,0.25); }

.btn-danger {
    background: transparent;
    color: var(--red);
    border-color: rgba(239,68,68,0.3);
}
.btn-danger:hover { background: var(--red-soft); }

.btn-ghost {
    background: transparent;
    color: var(--slate);
    border: none;
    padding: 6px 10px;
}
.btn-ghost:hover { color: var(--white); }

.btn-sm { font-size: 0.75rem; padding: 5px 12px; }

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    background: transparent;
    border: 1px solid rgba(255,255,255,0.08);
    color: var(--slate);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.btn-icon:hover { color: var(--white); border-color: rgba(255,255,255,0.2); }

.btn-group { display: flex; gap: 8px; flex-wrap: wrap; }

/* ===== SEARCH / FILTER BAR ===== */
.filter-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 200px;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.85rem;
    padding: 10px 16px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 8px;
    color: var(--white);
    outline: none;
    transition: border-color 0.2s;
}

.search-input:focus { border-color: var(--amber); }
.search-input::placeholder { color: rgba(148,163,184,0.5); }

.select-input {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.85rem;
    padding: 10px 16px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 8px;
    color: var(--white);
    outline: none;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%2394a3b8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 32px;
}

.select-input:focus { border-color: var(--amber); }

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--slate);
    margin-bottom: 6px;
}

.form-input {
    width: 100%;
    font-family: 'DM Sans', sans-serif;
    font-size: 0.85rem;
    padding: 10px 14px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 8px;
    color: var(--white);
    outline: none;
    transition: border-color 0.2s;
}

.form-input:focus { border-color: var(--amber); }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 600px) {
    .form-row { grid-template-columns: 1fr; }
}

/* ===== MODAL ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal-overlay.hidden { display: none; }

.modal-content {
    background: var(--charcoal);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 16px;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.modal-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 24px;
    border-top: 1px solid rgba(255,255,255,0.06);
}

/* ===== TOAST ===== */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    font-family: 'DM Sans', sans-serif;
    font-size: 0.85rem;
    padding: 12px 20px;
    border-radius: 8px;
    background: var(--steel);
    color: var(--white);
    border-left: 3px solid var(--amber);
    animation: slideIn 0.3s ease;
    max-width: 360px;
}

.toast.error { border-left-color: var(--red); }
.toast.success { border-left-color: var(--green); }

@keyframes slideIn {
    from { opacity: 0; transform: translateX(20px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 60px 24px;
    color: var(--slate);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    opacity: 0.3;
}

.empty-state p {
    font-size: 0.95rem;
    margin-bottom: 16px;
}

/* ===== LOADING ===== */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid rgba(245,158,11,0.2);
    border-top-color: var(--amber);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* ===== REORDER SUGGESTION CARD ===== */
.suggestion-card {
    padding: 20px 24px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 16px;
    align-items: start;
    transition: background 0.15s;
}

.suggestion-card:hover { background: rgba(245,158,11,0.03); }
.suggestion-card:last-child { border-bottom: none; }

.suggestion-priority {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-top: 6px;
}

.suggestion-priority.critical { background: var(--red); box-shadow: 0 0 8px var(--red); }
.suggestion-priority.high { background: var(--orange); box-shadow: 0 0 8px var(--orange); }
.suggestion-priority.medium { background: var(--blue); }

.suggestion-info h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.suggestion-info .part-num {
    font-size: 0.75rem;
    color: var(--amber);
    font-family: 'Space Grotesk', sans-serif;
    margin-bottom: 6px;
}

.suggestion-info .reason {
    font-size: 0.8rem;
    color: var(--slate);
    line-height: 1.5;
}

.suggestion-meta {
    font-size: 0.75rem;
    color: var(--slate);
    margin-top: 8px;
    display: flex;
    gap: 16px;
}

.suggestion-meta strong { color: var(--white); }

.suggestion-actions {
    display: flex;
    flex-direction: column;
    gap: 6px;
    flex-shrink: 0;
}

/* ===== MOVEMENT TYPE ICONS ===== */
.movement-icon {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    flex-shrink: 0;
}

.movement-icon.received { background: var(--green-soft); color: var(--green); }
.movement-icon.sold { background: var(--blue-soft); color: var(--blue); }
.movement-icon.adjustment { background: var(--orange-soft); color: var(--orange); }
.movement-icon.return { background: rgba(168,85,247,0.15); color: #a855f7; }
.movement-icon.damaged { background: var(--red-soft); color: var(--red); }

/* ===== CATEGORY BREAKDOWN ===== */
.cat-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 24px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
    font-size: 0.85rem;
}

.cat-row:last-child { border-bottom: none; }

.cat-name {
    font-weight: 500;
}

.cat-stats {
    display: flex;
    gap: 24px;
    color: var(--slate);
    font-size: 0.8rem;
}

.cat-stats strong { color: var(--white); }

/* ===== AI INSIGHTS BOX ===== */
.ai-box {
    background: linear-gradient(135deg, var(--amber-glow), rgba(59,130,246,0.08));
    border: 1px solid rgba(245,158,11,0.2);
    border-radius: 12px;
    padding: 20px 24px;
    margin-bottom: 24px;
}

.ai-box-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--amber);
}

.ai-box-content {
    font-size: 0.85rem;
    color: var(--off-white);
    line-height: 1.7;
    white-space: pre-wrap;
}

.ai-box-content p { margin-bottom: 8px; }

/* ===== SKU DETAIL ===== */
.sku-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.sku-field {
    padding: 10px 0;
}

.sku-field-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--slate);
    margin-bottom: 4px;
}

.sku-field-value {
    font-size: 0.9rem;
    color: var(--white);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .stat-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .page-header { flex-direction: column; align-items: flex-start; }

    .topnav-links {
        gap: 0;
    }

    .nav-link {
        padding: 8px 10px;
        font-size: 0.8rem;
    }

    .suggestion-card {
        grid-template-columns: auto 1fr;
    }

    .suggestion-actions {
        grid-column: 2;
        flex-direction: row;
    }

    .sku-detail-grid {
        grid-template-columns: 1fr;
    }
}