/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg-primary: #0f0f13;
    --bg-secondary: #1a1a24;
    --bg-card: #1e1e2a;
    --bg-card-hover: #252535;
    --bg-input: #16161f;
    --border: #2a2a3a;
    --border-light: #35354a;
    --text-primary: #f0ede6;
    --text-secondary: #9a9ab0;
    --text-muted: #6a6a80;
    --accent: #d4a332;
    --accent-light: #e8be5a;
    --accent-dark: #b88a1a;
    --accent-glow: rgba(212, 163, 50, 0.15);
    --success: #34d399;
    --success-bg: rgba(52, 211, 153, 0.1);
    --danger: #f87171;
    --danger-bg: rgba(248, 113, 113, 0.1);
    --warning: #fbbf24;
    --warning-bg: rgba(251, 191, 36, 0.1);
    --info: #60a5fa;
    --info-bg: rgba(96, 165, 250, 0.1);
    --sidebar-w: 240px;
    --header-h: 56px;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0,0,0,0.3);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
    --transition: 0.2s ease;
}

html { font-size: 15px; }
body {
    font-family: 'Inter', -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

h1 { font-size: 1.8rem; font-weight: 700; }
h2 { font-size: 1.4rem; font-weight: 600; }
h3 { font-size: 1.15rem; font-weight: 600; }

a { color: var(--accent); text-decoration: none; }
input, select, textarea, button { font-family: inherit; font-size: inherit; }

/* ===== SIDEBAR ===== */
.sidebar {
    position: fixed; left: 0; top: 0; bottom: 0;
    width: var(--sidebar-w);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex; flex-direction: column;
    z-index: 100;
    transition: transform 0.3s ease;
}
.sidebar-header {
    padding: 20px 16px;
    border-bottom: 1px solid var(--border);
}
.logo {
    display: flex; align-items: center; gap: 10px;
}
.logo-icon { font-size: 1.8rem; }
.logo-text { font-size: 1.3rem; font-weight: 700; color: var(--text-primary); }
.logo-highlight { color: var(--accent); }

.sidebar-nav {
    flex: 1; padding: 12px 8px;
    display: flex; flex-direction: column; gap: 4px;
    overflow-y: auto;
}
.sidebar-footer {
    padding: 12px 8px;
    border-top: 1px solid var(--border);
    display: flex; flex-direction: column; gap: 4px;
}
.nav-btn {
    display: flex; align-items: center; gap: 12px;
    padding: 12px 16px;
    background: transparent;
    border: none; border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    width: 100%; text-align: left;
    font-size: 0.95rem; font-weight: 500;
}
.nav-btn:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}
.nav-btn.active {
    background: var(--accent-glow);
    color: var(--accent);
    font-weight: 600;
}
.nav-icon { font-size: 1.2rem; width: 24px; text-align: center; }

/* ===== MOBILE HEADER ===== */
.mobile-header {
    display: none;
    position: fixed; top: 0; left: 0; right: 0;
    height: var(--header-h);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    align-items: center; gap: 12px;
    padding: 0 16px;
    z-index: 90;
}
.menu-toggle {
    background: none; border: none; color: var(--text-primary);
    font-size: 1.5rem; cursor: pointer; padding: 4px 8px;
}
.mobile-title { font-weight: 600; font-size: 1.1rem; }

/* ===== MAIN CONTENT ===== */
.main-content {
    margin-left: var(--sidebar-w);
    min-height: 100vh;
    padding: 32px;
}
.page { display: none; animation: fadeIn 0.3s ease; }
.page.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== PAGE HEADER ===== */
.page-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 28px; flex-wrap: wrap; gap: 12px;
}
.page-title { display: flex; align-items: center; gap: 10px; }
.page-title-icon { font-size: 1.6rem; }

/* ===== CARDS ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: var(--transition);
}
.card:hover { border-color: var(--border-light); }

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px; margin-bottom: 28px;
}
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: var(--transition);
    position: relative; overflow: hidden;
}
.stat-card::after {
    content: '';
    position: absolute; top: 0; left: 0;
    width: 4px; height: 100%;
    border-radius: 0 4px 4px 0;
}
.stat-card.accent::after { background: var(--accent); }
.stat-card.success::after { background: var(--success); }
.stat-card.danger::after { background: var(--danger); }
.stat-card.info::after { background: var(--info); }
.stat-card.warning::after { background: var(--warning); }

.stat-label {
    font-size: 0.8rem; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: 0.5px;
    margin-bottom: 8px; font-weight: 600;
}
.stat-value {
    font-size: 1.6rem; font-weight: 800;
    letter-spacing: -0.5px;
}
.stat-sub {
    font-size: 0.8rem; color: var(--text-secondary);
    margin-top: 4px;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 10px 20px;
    border: none; border-radius: var(--radius-sm);
    font-weight: 600; cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    white-space: nowrap;
}
.btn-primary {
    background: var(--accent);
    color: #1a1a24;
}
.btn-primary:hover { background: var(--accent-light); transform: translateY(-1px); }
.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-card-hover); border-color: var(--border-light); }
.btn-success { background: var(--success); color: #0f0f13; }
.btn-success:hover { filter: brightness(1.1); }
.btn-danger { background: var(--danger); color: #0f0f13; }
.btn-danger:hover { filter: brightness(1.1); }
.btn-sm { padding: 6px 14px; font-size: 0.82rem; }
.btn-lg { padding: 14px 28px; font-size: 1.05rem; }
.btn-block { width: 100%; justify-content: center; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ===== FORMS ===== */
.form-group { margin-bottom: 16px; }
.form-label {
    display: block; margin-bottom: 6px;
    font-size: 0.85rem; font-weight: 600;
    color: var(--text-secondary);
}
.form-input, .form-select {
    width: 100%; padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    transition: var(--transition);
    font-size: 0.95rem;
}
.form-input:focus, .form-select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-input::placeholder { color: var(--text-muted); }
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
}

/* ===== TABLE ===== */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}
table {
    width: 100%; border-collapse: collapse;
    background: var(--bg-card);
}
thead th {
    padding: 12px 16px;
    text-align: left; font-size: 0.8rem;
    color: var(--text-muted); text-transform: uppercase;
    letter-spacing: 0.5px; font-weight: 600;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    font-size: 0.9rem;
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--bg-card-hover); }

/* ===== MODAL ===== */
.modal-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 200;
    opacity: 0; pointer-events: none;
    transition: opacity 0.3s ease;
}
.modal-overlay.active { opacity: 1; pointer-events: all; }
.modal {
    position: fixed;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%) scale(0.95);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 90%; max-width: 520px;
    max-height: 85vh; overflow-y: auto;
    z-index: 210;
    opacity: 0; pointer-events: none;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}
.modal.active {
    opacity: 1; pointer-events: all;
    transform: translate(-50%, -50%) scale(1);
}
.modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
}
.modal-close {
    background: none; border: none; color: var(--text-muted);
    font-size: 1.2rem; cursor: pointer; padding: 4px 8px;
    border-radius: 6px; transition: var(--transition);
}
.modal-close:hover { background: var(--bg-card); color: var(--text-primary); }
.modal-body { padding: 24px; }

/* ===== TOAST ===== */
.toast-container {
    position: fixed; bottom: 24px; right: 24px;
    z-index: 300;
    display: flex; flex-direction: column; gap: 8px;
}
.toast {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem; font-weight: 500;
    animation: slideInToast 0.3s ease;
    box-shadow: var(--shadow);
    min-width: 280px;
    display: flex; align-items: center; gap: 10px;
}
.toast-success { background: #166534; color: #bbf7d0; border: 1px solid #22c55e; }
.toast-error { background: #7f1d1d; color: #fecaca; border: 1px solid #ef4444; }
.toast-info { background: #1e3a5f; color: #bfdbfe; border: 1px solid #3b82f6; }
.toast-warning { background: #713f12; color: #fef08a; border: 1px solid #eab308; }

@keyframes slideInToast {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

/* ===== PDV LAYOUT ===== */
.pdv-container {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 24px; min-height: calc(100vh - 96px);
}
.pdv-products {
    display: flex; flex-direction: column; gap: 16px;
}
.pdv-categories {
    display: flex; gap: 8px; flex-wrap: wrap;
}
.cat-btn {
    padding: 8px 18px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-secondary);
    cursor: pointer; font-weight: 500;
    transition: var(--transition);
    font-size: 0.85rem;
}
.cat-btn:hover { border-color: var(--accent); color: var(--accent); }
.cat-btn.active {
    background: var(--accent); color: #1a1a24;
    border-color: var(--accent); font-weight: 600;
}
.pdv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
}
.pdv-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 12px;
    text-align: center; cursor: pointer;
    transition: var(--transition);
    display: flex; flex-direction: column;
    align-items: center; gap: 6px;
}
.pdv-item:hover {
    border-color: var(--accent);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(212,163,50,0.1);
}
.pdv-item:active { transform: translateY(0); }
.pdv-item-emoji { font-size: 2rem; }
.pdv-item-name {
    font-size: 0.82rem; font-weight: 600;
    line-height: 1.3;
    max-height: 2.6em; overflow: hidden;
}
.pdv-item-price {
    font-size: 0.95rem; font-weight: 700;
    color: var(--accent);
}
.pdv-item-stock {
    font-size: 0.7rem; color: var(--text-muted);
}

/* PDV Cart */
.pdv-cart {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    display: flex; flex-direction: column;
    position: sticky; top: 32px;
    max-height: calc(100vh - 96px);
}
.cart-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    font-weight: 700; font-size: 1.1rem;
    display: flex; align-items: center; justify-content: space-between;
}
.cart-items {
    flex: 1; overflow-y: auto; padding: 12px;
    min-height: 120px;
}
.cart-item {
    display: flex; align-items: center; gap: 10px;
    padding: 10px; border-radius: var(--radius-sm);
    margin-bottom: 6px;
    background: var(--bg-input);
    transition: var(--transition);
}
.cart-item:hover { background: var(--bg-card-hover); }
.cart-item-info { flex: 1; min-width: 0; }
.cart-item-name {
    font-size: 0.85rem; font-weight: 600;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.cart-item-price { font-size: 0.78rem; color: var(--text-secondary); }
.cart-item-qty {
    display: flex; align-items: center; gap: 6px;
}
.qty-btn {
    width: 26px; height: 26px;
    border-radius: 6px; border: 1px solid var(--border);
    background: var(--bg-card); color: var(--text-primary);
    cursor: pointer; font-size: 0.9rem;
    display: flex; align-items: center; justify-content: center;
    transition: var(--transition);
}
.qty-btn:hover { border-color: var(--accent); color: var(--accent); }
.cart-item-subtotal {
    font-weight: 700; font-size: 0.88rem;
    white-space: nowrap;
}
.cart-empty {
    text-align: center; padding: 40px 20px;
    color: var(--text-muted);
}
.cart-footer {
    border-top: 1px solid var(--border);
    padding: 16px 20px;
}
.cart-total {
    display: flex; justify-content: space-between;
    align-items: center; margin-bottom: 16px;
    font-size: 1.2rem; font-weight: 800;
}
.cart-total-value { color: var(--accent); }
.payment-methods {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 8px; margin-bottom: 12px;
}
.pay-btn {
    padding: 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-input);
    color: var(--text-secondary);
    cursor: pointer; font-size: 0.82rem;
    font-weight: 600;
    transition: var(--transition);
    text-align: center;
}
.pay-btn:hover { border-color: var(--accent); color: var(--accent); }
.pay-btn.selected {
    border-color: var(--accent);
    background: var(--accent-glow);
    color: var(--accent);
}

/* ===== BADGES ===== */
.badge {
    display: inline-flex; align-items: center;
    padding: 3px 10px; border-radius: 12px;
    font-size: 0.75rem; font-weight: 600;
}
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-info { background: var(--info-bg); color: var(--info); }
.badge-accent { background: var(--accent-glow); color: var(--accent); }

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center; padding: 60px 20px;
    color: var(--text-muted);
}
.empty-state-icon { font-size: 3rem; margin-bottom: 12px; }
.empty-state-text { font-size: 1rem; }

/* ===== SEARCH ===== */
.search-box {
    position: relative; max-width: 320px;
}
.search-box .form-input { padding-left: 38px; }
.search-icon {
    position: absolute; left: 12px; top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted); font-size: 1rem;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .mobile-header { display: flex; }
    .main-content { margin-left: 0; padding: 16px; padding-top: calc(var(--header-h) + 16px); }
    .pdv-container { grid-template-columns: 1fr; }
    .pdv-cart { position: static; max-height: none; }
    .stats-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
}
@media (max-width: 480px) {
    .pdv-grid { grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); }
    .payment-methods { grid-template-columns: 1fr; }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

/* ===== REPORT SECTION ===== */
.report-filters {
    display: flex; gap: 12px; flex-wrap: wrap;
    align-items: flex-end; margin-bottom: 24px;
}
.report-section { margin-bottom: 32px; }
.report-section h3 { margin-bottom: 16px; }

/* ===== FIADO HIGHLIGHT ===== */
.fiado-alert {
    background: var(--warning-bg);
    border: 1px solid var(--warning);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    color: var(--warning);
    font-size: 0.9rem;
    margin-bottom: 16px;
    display: flex; align-items: center; gap: 8px;
}

/* ===== STOCK INDICATOR ===== */
.stock-low { color: var(--danger); }
.stock-ok { color: var(--success); }
.stock-mid { color: var(--warning); }