/* ============================================================
   MODERN & CLEAN THEME
   Primary (60%):  Crisp White #F8F9FA / Soft Gray #E9ECEF
   Secondary (30%): Steel Blue #4A90E2
   Accents (10%):   Add to Cart   -> Emerald Green  #2ECC71
                    Low Stock     -> Warning Orange #F39C12
                    Out of Stock  -> Dark Gray      #7F8C8D
   ============================================================ */
:root {
    /* --- Steel Blue scale (mapped over old green-* names so existing markup keeps working) --- */
    --green-50:  #eef5fd;
    --green-100: #d6e7fa;
    --green-200: #b9d6f5;
    --green-300: #8fbcec;
    --green-400: #6ba6e6;
    --green-500: #4A90E2;
    --green-600: #3a7fd0;
    --green-700: #2f6cb5;
    --green-800: #275a98;
    --green-900: #1f4677;

    /* --- Neutrals: crisp white + soft gray base --- */
    --white:       #ffffff;
    --gray-50:     #F8F9FA;
    --gray-100:    #E9ECEF;
    --gray-200:    #dee2e6;
    --gray-300:    #ced4da;
    --gray-400:    #adb5bd;
    --gray-500:    #6c757d;
    --gray-600:    #495057;
    --gray-700:    #343a40;
    --gray-800:    #212529;
    --gray-900:    #121417;

    /* --- Accents --- */
    --accent-cart:     #2ECC71;   /* Emerald Green  - Add to Cart   */
    --accent-cart-dk:  #27ae60;
    --accent-warn:     #F39C12;   /* Warning Orange - Low Stock     */
    --accent-warn-dk:  #d9890f;
    --accent-out:      #7F8C8D;   /* Dark Gray      - Out of Stock  */
    --accent-out-dk:   #6c7879;

    --success: #2ECC71;
    --danger:  #e74c3c;
    --warning: #F39C12;
    --info:    #4A90E2;

    --shadow-sm: 0 1px 2px rgba(33,37,41,0.06);
    --shadow-md: 0 2px 8px rgba(33,37,41,0.10);
    --shadow-lg: 0 8px 28px rgba(33,37,41,0.14);

    --sidebar-w: 240px;
}

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

html, body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--gray-50);
    color: var(--gray-800);
    min-height: 100vh;
}

a { color: var(--green-600); text-decoration: none; }
a:hover { color: var(--green-800); }

/* ============================================================
   APP SHELL - sidebar at left + main area
   ============================================================ */
.app-shell {
    display: flex;
    min-height: 100vh;
}

/* ============ SIDEBAR ============ */
.sidebar {
    width: var(--sidebar-w);
    background-color: var(--white);
    color: var(--gray-800);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    box-shadow: var(--shadow-md);
    border-right: 1px solid var(--gray-200);
    z-index: 100;
}

.sidebar-brand {
    padding: 20px 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--gray-200);
}

.brand-icon {
    width: 46px; height: 46px;
    border-radius: 50%;
    background-color: var(--white);
    border: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.brand-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.brand-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--gray-800);
    line-height: 1.2;
}

.brand-sub {
    font-size: 0.7rem;
    color: var(--gray-500);
    margin-top: 2px;
}

.sidebar-user {
    padding: 16px 18px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--gray-200);
    background-color: var(--gray-50);
}

.user-avatar {
    width: 38px; height: 38px;
    border-radius: 50%;
    background-color: var(--green-500);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
    flex-shrink: 0;
}

.user-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-800);
    line-height: 1.2;
}

.user-role {
    font-size: 0.7rem;
    color: var(--gray-500);
    margin-top: 2px;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
}

.nav-section {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--gray-400);
    letter-spacing: 1.5px;
    padding: 8px 12px;
    margin-top: 6px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: 8px;
    color: var(--gray-600);
    font-size: 0.88rem;
    font-weight: 500;
    margin-bottom: 2px;
    transition: background 0.15s, color 0.15s;
}

.nav-link:hover {
    background-color: var(--gray-100);
    color: var(--green-700);
}

.nav-link.active {
    background-color: var(--green-500);
    color: var(--white);
    font-weight: 600;
}

.nav-icon {
    width: 20px;
    text-align: center;
    font-size: 0.95rem;
    flex-shrink: 0;
}

.sidebar-footer {
    padding: 14px 12px;
    border-top: 1px solid var(--gray-200);
}

.logout-link {
    color: var(--gray-600);
}

.logout-link:hover {
    background-color: var(--danger);
    color: var(--white);
}

/* ============ MAIN AREA ============ */
.main-area {
    flex: 1;
    margin-left: var(--sidebar-w);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.content-wrap {
    flex: 1;
    padding: 30px;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

.footer {
    background-color: var(--white);
    border-top: 1px solid var(--gray-200);
    text-align: center;
    padding: 14px;
    font-size: 0.8rem;
    color: var(--gray-500);
}

/* ============ PAGE TITLE ============ */
.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 22px;
    padding-bottom: 14px;
    border-bottom: 2px solid var(--green-500);
    display: inline-block;
    min-width: 260px;
}

/* ============ CARDS ============ */
.card {
    background-color: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 10px;
    padding: 22px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}

.card-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--gray-200);
}

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

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.85rem;
    color: var(--gray-700);
    font-weight: 500;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    background-color: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    color: var(--gray-800);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.form-control:focus {
    border-color: var(--green-500);
    box-shadow: 0 0 0 3px rgba(74,144,226,0.18);
}

select.form-control option { background-color: var(--white); color: var(--gray-800); }

/* ============ BUTTONS ============ */
.btn {
    display: inline-block;
    padding: 9px 18px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 600;
    transition: background 0.15s, transform 0.05s, box-shadow 0.15s;
}

.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn:active { transform: translateY(0); }

.btn-primary  { background-color: var(--green-500); color: var(--white); }
.btn-primary:hover  { background-color: var(--green-600); }
.btn-success  { background-color: var(--accent-cart); color: var(--white); }
.btn-success:hover  { background-color: var(--accent-cart-dk); }
.btn-danger   { background-color: var(--danger); color: var(--white); }
.btn-danger:hover   { background-color: #c0392b; }
.btn-warning  { background-color: var(--accent-warn); color: var(--white); }
.btn-warning:hover  { background-color: var(--accent-warn-dk); }
.btn-secondary{ background-color: var(--gray-100); color: var(--gray-700); border: 1px solid var(--gray-200); }
.btn-secondary:hover{ background-color: var(--gray-200); }
.btn-sm { padding: 5px 11px; font-size: 0.78rem; }

/* Add-to-cart specific accent */
.btn-cart { background-color: var(--accent-cart); color: var(--white); }
.btn-cart:hover { background-color: var(--accent-cart-dk); }

/* Disabled / out of stock */
.btn[disabled], .btn.btn-disabled {
    background-color: var(--accent-out);
    color: var(--white);
    cursor: not-allowed;
    opacity: 0.85;
}
.btn[disabled]:hover, .btn.btn-disabled:hover {
    background-color: var(--accent-out);
    transform: none;
    box-shadow: none;
}

/* ============ TABLES ============ */
.table-container { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

table th {
    background-color: var(--gray-50);
    color: var(--gray-700);
    padding: 11px 12px;
    text-align: left;
    font-weight: 700;
    border-bottom: 2px solid var(--green-500);
    font-size: 0.78rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

table td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--gray-200);
    color: var(--gray-700);
}

table tr:hover td { background-color: var(--gray-50); }

/* ============ ALERTS ============ */
.alert {
    padding: 11px 14px;
    border-radius: 6px;
    margin-bottom: 14px;
    font-size: 0.88rem;
    border-left: 4px solid;
}

.alert-success {
    background-color: #eafaf1;
    border-color: var(--accent-cart);
    color: #1e6b3f;
}

.alert-danger {
    background-color: #fdeded;
    border-color: var(--danger);
    color: #a93226;
}

.alert-warning {
    background-color: #fef5e7;
    border-color: var(--accent-warn);
    color: #9c6610;
}

.alert-info {
    background-color: #eef5fd;
    border-color: var(--info);
    color: #2f6cb5;
}

/* ============ LAYOUT ============ */
.row { display: flex; flex-wrap: wrap; gap: 20px; }
.col { flex: 1; min-width: 200px; }
.col-2 { flex: 2; min-width: 300px; }

/* ============ LOGIN PAGES ============ */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    padding: 20px;
}

.login-box {
    background-color: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 14px;
    padding: 40px;
    width: 400px;
    box-shadow: var(--shadow-lg);
}

.login-logo {
    width: 84px;
    height: 84px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.login-title {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--gray-800);
}

.login-subtitle {
    text-align: center;
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-bottom: 24px;
}

/* ============ STAT BOXES ============ */
.stat-box {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-top: 3px solid var(--green-500);
    border-radius: 10px;
    padding: 22px;
    text-align: center;
    color: var(--gray-800);
    box-shadow: var(--shadow-sm);
}

.stat-value { font-size: 1.9rem; font-weight: 700; color: var(--green-600); }
.stat-label { font-size: 0.78rem; color: var(--gray-500); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.5px; }

/* ============ BADGES ============ */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.72rem;
    font-weight: 600;
}

.badge-silver { background-color: var(--gray-200); color: var(--gray-700); }
.badge-gold { background-color: #fef5e7; color: var(--accent-warn-dk); }
.badge-platinum { background-color: var(--green-100); color: var(--green-800); }

/* Stock status pills */
.badge-instock { background-color: #eafaf1; color: var(--accent-cart-dk); }
.badge-lowstock { background-color: #fef5e7; color: var(--accent-warn-dk); }
.badge-outstock { background-color: #eceeee; color: var(--accent-out-dk); }

/* ============ CART / RECEIPT ============ */
.cart-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--gray-200);
}

.receipt-box {
    background-color: var(--gray-50);
    border: 1px dashed var(--gray-300);
    border-radius: 8px;
    padding: 20px;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: var(--gray-800);
}

.receipt-line { display: flex; justify-content: space-between; margin: 4px 0; }
.receipt-divider { border-top: 1px dashed var(--gray-400); margin: 8px 0; }
.receipt-total { font-weight: 700; font-size: 1rem; color: var(--green-700); }

/* ============ CHART BARS ============ */
.chart-bar-wrap { margin: 8px 0; }
.chart-label { font-size: 0.82rem; color: var(--gray-700); margin-bottom: 3px; font-weight: 500; }
.chart-bar-bg { background-color: var(--gray-100); border-radius: 4px; height: 18px; overflow: hidden; }
.chart-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--green-400), var(--green-600));
    border-radius: 4px;
    transition: width 0.5s;
}
.chart-value { font-size: 0.74rem; color: var(--gray-500); text-align: right; margin-top: 2px; }

/* ============ UTILITIES ============ */
.text-right { text-align: right; }
.text-center { text-align: center; }
.mt-2 { margin-top: 12px; }
.mb-2 { margin-bottom: 12px; }
.gap-2 { gap: 12px; }
.flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.hidden { display: none; }

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
    .sidebar { width: 70px; }
    .sidebar-brand .brand-text,
    .sidebar-user .user-meta,
    .nav-link span:not(.nav-icon),
    .nav-section { display: none; }
    .nav-link { justify-content: center; }
    .main-area { margin-left: 70px; }
    .content-wrap { padding: 16px; }
}