/* ===============================
   GLOBAL  LIGHT MODE ONLY
   =============================== */

:root{
    --bg: #f6f7fb;
    --card: #ffffff;
    --text: #111827;
    --muted: #4b5563;
    --border: #e5e7eb;
    --soft: #f1f5f9;

    --primary: #2563eb;
    --primarySoft: #eef2ff;

    --danger: #dc2626;
    --dangerSoft: #fef2f2;

    --shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
    --shadowSoft: 0 6px 18px rgba(17, 24, 39, 0.06);

    --radiusLg: 18px;
    --radiusMd: 14px;
}

*{ box-sizing: border-box; }

body{
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 16px;
}

/* ===============================
   LAYOUT
   =============================== */

.container{
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

.page-wrap{
    padding-top: 26px;
}

.public-header,
.public-footer,
.admin-footer{
    background: var(--card);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.public-footer,
.admin-footer{
    margin-top: 44px;
}

/* ===============================
   TYPOGRAPHY
   =============================== */

h1{
    font-size: 30px;
    margin: 0 0 22px 0;
    letter-spacing: -0.2px;
}

h2{
    font-size: 22px;
    margin: 26px 0 12px 0;
}

p{
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
}

.muted{
    color: var(--muted);
}

/* ===============================
   BUTTONS
   =============================== */

.btn{
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 18px;
    border-radius: var(--radiusMd);
    border: 1px solid #cfd5e1;
    background: var(--card);
    color: var(--text);
    text-decoration: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 650;
    box-shadow: var(--shadowSoft);
    transition: transform 140ms ease, box-shadow 140ms ease, background 140ms ease, border-color 140ms ease;
}

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

.btn:active{
    transform: translateY(0);
}

.btn.primary{
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.22);
}

.btn.primary:hover{
    box-shadow: 0 14px 34px rgba(37, 99, 235, 0.26);
}

/* ===============================
   TABLES
   =============================== */

.table{
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: var(--card);
    border-radius: var(--radiusLg);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadowSoft);
}

.table th,
.table td{
    padding: 16px 16px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    font-size: 16px;
}

.table th{
    background: var(--soft);
    font-weight: 750;
    color: #1f2937;
}

.table tr:last-child td{
    border-bottom: 0;
}

/* ===============================
   FORMS
   =============================== */

.form{
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radiusLg);
    padding: 22px;
    box-shadow: var(--shadowSoft);
}

form label{
    display: block;
    margin-top: 18px;
    font-weight: 750;
    font-size: 16px;
    color: #1f2937;
}

form input,
form textarea,
form select{
    width: 100%;
    padding: 16px 16px;
    border-radius: 14px;
    border: 1px solid #cfd5e1;
    margin-top: 8px;
    font-size: 16px;
    background: #ffffff;
    color: var(--text);
    outline: none;
    transition: border-color 140ms ease, box-shadow 140ms ease;
}

form textarea{
    min-height: 120px;
    resize: vertical;
}

form input:focus,
form textarea:focus,
form select:focus{
    border-color: rgba(37, 99, 235, 0.55);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

form button{
    margin-top: 20px;
}

/* ===============================
   CARDS  STATS
   =============================== */

.stats-grid{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 20px;
}

.stat-card{
    background: var(--card);
    padding: 26px 22px;
    border-radius: var(--radiusLg);
    text-align: center;
    border: 1px solid var(--border);
    box-shadow: var(--shadowSoft);
}

.stat-card strong{
    font-size: 30px;
    display: block;
    margin-bottom: 8px;
    letter-spacing: -0.4px;
}

.stat-card span{
    color: var(--muted);
    font-size: 16px;
}

/* ===============================
   CATALOG
   =============================== */

.catalog{
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.product-card{
    background: var(--card);
    padding: 22px;
    border-radius: var(--radiusLg);
    border: 1px solid var(--border);
    box-shadow: var(--shadowSoft);
}

.product-card strong{
    font-size: 18px;
    display: block;
}

.product-card .price{
    font-size: 18px;
    margin: 10px 0 8px 0;
    font-weight: 750;
    color: #0f172a;
}

.product-card .stock{
    color: var(--muted);
    margin-bottom: 12px;
    font-size: 16px;
}

.product-card .qty{
    width: 100%;
    margin: 10px 0 12px 0;
}

/* ===============================
   ALERTS
   =============================== */

.alert{
    padding: 16px;
    border-radius: 14px;
    background: #fef3c7;
    border: 1px solid #fde68a;
    margin-bottom: 20px;
    font-size: 16px;
    color: #92400e;
}

.alert.error{
    background: var(--dangerSoft);
    border-color: rgba(220, 38, 38, 0.25);
    color: #7f1d1d;
}

/* ===============================
   ADMIN HEADER  PREMIUM
   =============================== */

.admin-header{
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.admin-topbar{
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding-top: 18px;
    padding-bottom: 18px;
}

.brand{
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 220px;
}

.brand-title{
    font-size: 18px;
    font-weight: 850;
    letter-spacing: -0.2px;
    color: #0f172a;
}

.brand-subtitle{
    font-size: 16px;
    color: var(--muted);
}

.admin-nav{
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: flex-end;
    gap: 10px;
}

.admin-nav a{
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 14px;
    border-radius: 999px;
    border: 1px solid #d7dde8;
    background: #ffffff;
    text-decoration: none;
    color: #111827;
    font-size: 16px;
    font-weight: 750;
    transition: background 140ms ease, border-color 140ms ease, transform 140ms ease, box-shadow 140ms ease;
    box-shadow: 0 6px 14px rgba(17, 24, 39, 0.06);
}

.admin-nav a:hover{
    transform: translateY(-1px);
    border-color: rgba(37, 99, 235, 0.35);
    box-shadow: 0 10px 22px rgba(17, 24, 39, 0.09);
    background: #fbfdff;
}

.admin-nav a.active{
    background: var(--primarySoft);
    border-color: rgba(37, 99, 235, 0.35);
    color: #1e3a8a;
    box-shadow: 0 10px 22px rgba(37, 99, 235, 0.14);
}

.admin-nav a.danger{
    background: #ffffff;
    border-color: rgba(220, 38, 38, 0.35);
    color: #991b1b;
}

.admin-nav a.danger:hover{
    background: var(--dangerSoft);
}

/* ===============================
   LOGIN PAGE
   =============================== */

body.login{
    background: linear-gradient(180deg, #eef2ff 0%, #f6f7fb 60%, #f6f7fb 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-box{
    width: 100%;
    max-width: 520px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 28px;
    box-shadow: var(--shadow);
}

.login-box h1{
    margin: 0 0 14px 0;
}

/* ===============================
   PUBLIC HEADER
   =============================== */

.public-header .container{
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
}

.public-header strong{
    font-size: 18px;
    font-weight: 850;
}

.public-header span{
    font-size: 16px;
    color: var(--muted);
}