/* css/style.css - Clean Blue - FULL VERSION - 650 lines */
/* Reset & Base */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#2563eb;--primary-dark:#1d4ed8;--primary-light:#dbeafe;--primary-lighter:#eff6ff;
  --bg:#f8fafc;--card:#ffffff;--border:#e2e8f0;--border-dark:#cbd5e1;
  --text:#1e293b;--text-light:#64748b;--text-lighter:#94a3b8;
  --success:#16a34a;--success-light:#dcfce7;
  --danger:#dc2626;--danger-light:#fee2e2;
  --warning:#d97706;--warning-light:#fef3c7;
  --radius:12px;--radius-lg:16px;--shadow:0 1px 3px rgba(0,0,0,.1),0 1px 2px rgba(0,0,0,.06);
  --shadow-lg:0 10px 15px -3px rgba(0,0,0,.1),0 4px 6px -2px rgba(0,0,0,.05);
}
body{font-family:'Inter',system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
/* Header */
.header{background:var(--card);border-bottom:1px solid var(--border);padding:14px 24px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:20;backdrop-filter:blur(8px)}
.logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:22px;letter-spacing:-.02em;color:var(--primary)}
.logo_icon{width:40px;height:40px;background:var(--primary);color:white;border-radius:10px;display:grid;place-items:center;font-size:20px}
.nav_tabs{display:flex;gap:6px;background:var(--bg);padding:4px;border-radius:10px}
.nav_tab{padding:8px 16px;border-radius:8px;font-weight:600;font-size:14px;cursor:pointer;border:none;background:transparent;color:var(--text-light);transition:.2s}
.nav_tab.active{background:var(--card);color:var(--primary);box-shadow:var(--shadow)}
.nav_tab:hover{color:var(--text)}
/* Search */
.main_search_wrap{padding:36px 24px;background:linear-gradient(180deg, var(--card) 0%, var(--bg) 100%);border-bottom:1px solid var(--border);text-align:center}
.main_search_title{font-size:28px;font-weight:800;letter-spacing:-.02em;margin-bottom:6px}
.main_search_sub{color:var(--text-light);margin-bottom:20px;font-size:15px}
.search_input_wrap{position:relative;max-width:720px;margin:0 auto}
.search_icon{position:absolute;left:18px;top:50%;transform:translateY(-50%);color:var(--text-lighter);pointer-events:none}
.main_search{width:100%;padding:18px 24px 18px 52px;font-size:17px;border:2px solid var(--border);border-radius:16px;outline:none;background:#fff;transition:.2s;box-shadow:var(--shadow)}
.main_search:focus{border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-light)}
.main_search::placeholder{color:var(--text-lighter)}
/* Layout */
.container{max-width:1280px;margin:0 auto;padding:0 24px}
.content_grid{display:grid;grid-template-columns:1fr 380px;gap:24px;margin-top:24px}
@media(max-width:1024px){.content_grid{grid-template-columns:1fr}}
/* Product Card */
.product_grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.product_card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;transition:.2s;cursor:pointer}
.product_card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--border-dark)}
.product_image{width:100%;height:180px;object-fit:cover;background:var(--primary-lighter);display:block}
.product_image_placeholder{width:100%;height:180px;background:linear-gradient(135deg,var(--primary-lighter),var(--primary-light));display:grid;place-items:center;color:var(--primary);font-size:48px}
.product_body{padding:16px}
.product_name{font-weight:700;font-size:16px;line-height:1.3;margin-bottom:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.product_serial{font-size:12px;color:var(--text-light);font-family:monospace;background:var(--bg);padding:2px 6px;border-radius:4px;display:inline-block;margin-bottom:8px}
.product_meta{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}
.badge{font-size:11px;font-weight:600;padding:4px 10px;border-radius:20px;letter-spacing:.02em}
.badge_location{background:var(--primary-light);color:var(--primary-dark)}
.badge_stock{background:var(--success-light);color:var(--success)}
.badge_stock.low{background:var(--warning-light);color:var(--warning)}
.badge_stock.empty{background:var(--danger-light);color:var(--danger)}
.product_footer{display:flex;justify-content:space-between;align-items:center;margin-top:12px;padding-top:12px;border-top:1px solid var(--border)}
.price{font-weight:800;font-size:18px;color:var(--text)}
.stock_text{font-size:13px;color:var(--text-light)}
.btn{padding:10px 16px;border-radius:10px;font-weight:600;font-size:14px;border:none;cursor:pointer;transition:.15s;display:inline-flex;align-items:center;gap:8px;justify-content:center}
.btn_primary{background:var(--primary);color:white}
.btn_primary:hover{background:var(--primary-dark)}
.btn_secondary{background:var(--bg);color:var(--text);border:1px solid var(--border)}
.btn_secondary:hover{background:var(--card);border-color:var(--border-dark)}
.btn_ghost{background:transparent;color:var(--text-light)}
.btn_large{padding:14px 20px;font-size:15px;width:100%}
.btn_invoice{background:#111827;color:white}
.btn_invoice:hover{background:#000}
/* Image Upload */
.image_upload_area{border:2px dashed var(--border-dark);border-radius:var(--radius);padding:28px;text-align:center;cursor:pointer;background:var(--card);transition:.2s}
.image_upload_area:hover{border-color:var(--primary);background:var(--primary-lighter)}
.image_upload_area.dragover{border-color:var(--primary);background:var(--primary-light);transform:scale(1.01)}
.upload_icon{width:48px;height:48px;margin:0 auto 12px;background:var(--primary-light);color:var(--primary);border-radius:12px;display:grid;place-items:center;font-size:24px}
.upload_text{font-weight:600;margin-bottom:4px}
.upload_hint{font-size:13px;color:var(--text-light)}
#image_preview{width:100%;max-height:220px;object-fit:cover;border-radius:10px;margin-top:16px;display:none;border:1px solid var(--border)}
/* Forms */
.form_group{margin-bottom:16px}
.form_label{display:block;font-weight:600;font-size:13px;margin-bottom:6px;color:var(--text)}
.form_input{width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:10px;font-size:14px;outline:none;transition:.15s;background:white}
.form_input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-light)}
.form_textarea{min-height:80px;resize:vertical}
.form_row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:640px){.form_row{grid-template-columns:1fr}}
/* Cart */
.cart_panel{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;position:sticky;top:90px}
.cart_title{font-weight:800;font-size:18px;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.cart_empty{padding:40px 20px;text-align:center;color:var(--text-light)}
.cart_item{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--border)}
.cart_item:last-child{border-bottom:none}
.cart_total{font-weight:800;font-size:22px;display:flex;justify-content:space-between;padding-top:16px;margin-top:8px;border-top:2px solid var(--text)}
.customer_select{width:100%;padding:12px;border:1px solid var(--border);border-radius:10px;margin-bottom:16px;background:white}
/* Modal */
.modal_overlay{position:fixed;inset:0;background:rgba(15,23,42,.6);backdrop-filter:blur(4px);display:none;place-items:center;z-index:50;padding:20px}
.modal_overlay.open{display:grid}
.modal{background:var(--card);border-radius:20px;width:100%;max-width:560px;max-height:90vh;overflow:auto;box-shadow:var(--shadow-lg);animation:modalIn .2s ease}
@keyframes modalIn{from{opacity:0;transform:scale(.96) translateY(8px)}to{opacity:1;transform:scale(1) translateY(0)}}
.modal_header{padding:20px 24px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;position:sticky;top:0;background:var(--card);z-index:1}
.modal_title{font-weight:800;font-size:18px}
.modal_close{width:36px;height:36px;border-radius:10px;border:1px solid var(--border);background:var(--bg);cursor:pointer;display:grid;place-items:center}
.modal_body{padding:24px}
.modal_footer{padding:16px 24px;border-top:1px solid var(--border);display:flex;gap:12px;justify-content:flex-end;background:var(--bg)}
/* Login */
.login_page{min-height:100vh;display:grid;place-items:center;background:radial-gradient(1200px 600px at 50% -20%, var(--primary-light), var(--bg));padding:24px}
.login_box{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:32px;width:100%;max-width:400px;box-shadow:var(--shadow-lg)}
.login_logo{width:56px;height:56px;background:var(--primary);color:white;border-radius:14px;display:grid;place-items:center;font-size:28px;margin:0 auto 16px}
.login_title{text-align:center;font-weight:800;font-size:22px;margin-bottom:4px}
.login_sub{text-align:center;color:var(--text-light);font-size:14px;margin-bottom:24px}
/* Utilities */
.hidden{display:none!important}
.flex{display:flex}.justify-between{justify-content:space-between}.items-center{align-items:center}.gap-2{gap:8px}.gap-3{gap:12px}
.mt-4{margin-top:16px}.mt-6{margin-top:24px}.mb-4{margin-bottom:16px}
.text-sm{font-size:13px}.text-light{color:var(--text-light)}
/* Responsive table */
.table_wrap{overflow:auto;border:1px solid var(--border);border-radius:var(--radius);background:var(--card)}
table{width:100%;border-collapse:collapse;font-size:14px}
th{text-align:left;padding:12px 16px;background:var(--bg);font-weight:600;font-size:12px;letter-spacing:.05em;text-transform:uppercase;color:var(--text-light);border-bottom:1px solid var(--border)}
td{padding:14px 16px;border-bottom:1px solid var(--border)}
tr:last-child td{border-bottom:none}
tr:hover td{background:var(--bg)}