/* ==========================================
   SHOPBOX GLOBAL STYLES & THEMING
   ========================================== */

:root {
    --bg-dark: #0f172a;
    --card-bg: #1e293b;
    --card-border: #334155;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --accent: #38bdf8;
    --accent-cyan: #22d3ee;
    --accent-purple: #a855f7;
    --accent-orange: #f97316;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --radius-sm: 8px;
    --radius-md: 12px;
    --shadow-main: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.2);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    padding-bottom: 40px;
    line-height: 1.5;
}

/* ==========================================
   NAVIGATION BAR
   ========================================== */

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background-color: #0b1120;
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand h1 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-main);
}

.nav-brand h1 span {
    color: var(--accent);
    font-weight: 400;
}

.nav-actions {
    display: flex;
    gap: 12px;
}

/* ==========================================
   BUTTONS & INPUTS
   ========================================== */

.btn-primary, .btn-secondary, .btn-danger, .btn-return {
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    border: none;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, transform 0.1s;
}

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

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

.btn-secondary {
    background-color: #334155;
    color: var(--text-main);
}

.btn-secondary:hover {
    background-color: #475569;
}

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

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

.btn-return {
    background-color: #475569;
    color: #f8fafc;
}

.btn-return:hover {
    background-color: #64748b;
}

input, select, button {
    outline: none;
}

input[type="text"],
input[type="number"],
input[type="password"],
select {
    width: 100%;
    padding: 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--card-border);
    background-color: #0b1120;
    color: var(--text-main);
    font-size: 0.95rem;
}

input:focus, select:focus {
    border-color: var(--primary);
}

/* ==========================================
   CONTAINERS & CARDS
   ========================================== */

.app-container, .dashboard-container {
    max-width: 1100px;
    margin: 24px auto;
    padding: 0 16px;
}

.card {
    background-color: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-main);
}

.card h2 {
    font-size: 1.2rem;
    margin-bottom: 16px;
    color: var(--accent);
}

/* ==========================================
   PRODUCT CARDS GRID & INTERACTION POLISH
   ========================================== */

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.product-card {
    background-color: #0f172a;
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    padding: 16px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    /* Touch animation feedback */
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.product-card:hover {
    border-color: var(--primary);
}

.product-card:active {
    transform: scale(0.98);
}

.product-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--text-main);
}

.product-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.card-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
}

.card-actions button {
    flex: 1;
}

/* ==========================================
   METRICS & DASHBOARD STATS
   ========================================== */

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.metric-card {
    background-color: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 20px;
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-main);
    display: flex;
    flex-direction: column;
}

.metric-card h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.metric-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-main);
}

.metric-card.warning .metric-value {
    color: var(--warning);
}

/* ==========================================
   MODAL OVERLAY (SECURITY PIN LOCK)
   ========================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(11, 17, 32, 0.9);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    padding: 32px;
    width: 90%;
    max-width: 380px;
    text-align: center;
    box-shadow: var(--shadow-main);
}

.modal-card h2 {
    margin-bottom: 8px;
    color: var(--text-main);
}

.modal-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

/* ==========================================
   FORM LAYOUT HELPERS
   ========================================== */

.form-group {
    margin-bottom: 12px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}
/* ========= SALES TERMINAL STYLES (from upgrade) ========= */
:root {
  --card-bg: #1e293b;
  --card-border: #334155;
  --primary: #3b82f6;
  --success: #22c55e;
  --warning: #f59e0b;
  --text-main: #e2e8f0;
  --text-muted: #94a3b8;
  --radius-sm: 8px;
  --radius-md: 12px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: #0b1120;
  border-bottom: 1px solid var(--card-border);
  position: sticky;
  top: 0;
  z-index: 50;
}
header h1 { font-size: 1.25rem; font-weight: 700; }
.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding: 16px;
  max-width: 1100px;
  margin: 0 auto;
}
.summary-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 14px;
  text-align: center;
}
.summary-card .label { font-size: 0.75rem; color: var(--text-muted); }
.summary-card .value { font-size: 1.35rem; font-weight: 700; margin-top: 4px; }
.summary-card .value.green { color: var(--success); }
.summary-card .value.orange { color: var(--warning); }
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0 16px 12px;
  max-width: 1100px;
  margin: 0 auto;
}
.search-input { flex: 1; min-width: 200px; }
.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1px solid var(--card-border);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  cursor: pointer;
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.product-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 0 16px 24px;
  max-width: 1100px;
  margin: 0 auto;
}
.product-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
}
.product-name { font-weight: 600; }
.product-price { font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }
.product-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.stock-badge { font-size: 0.75rem; padding: 4px 8px; border-radius: 999px; font-weight: 600; }
.stock-high { background: #064e3b; color: #6ee7b7; }
.stock-low { background: #78350f; color: #fcd34d; }
.stock-out { background: #7f1d1d; color: #fca5a5; }
.action-btn {
  width: 36px; height: 36px; border: none; border-radius: 8px;
  font-size: 1.1rem; font-weight: bold; cursor: pointer;
}
.btn-sell { background: var(--primary); color: #fff; }
.btn-restock { background: var(--success); color: #fff; }
.btn-return { background: #475569; color: #fff; }
.empty-state { text-align: center; color: var(--text-muted); padding: 40px; }
@media (max-width: 600px) {
  .summary-grid { grid-template-columns: 1fr; }
  .product-card { flex-direction: column; align-items: flex-start; }
}