/* Material Design 3 - WMS Theme */
:root {
    --md-primary: #1a73e8;
    --md-on-primary: #ffffff;
    --md-primary-container: #d3e3fd;
    --md-on-primary-container: #041e49;
    --md-secondary: #5f6368;
    --md-surface: #ffffff;
    --md-surface-dim: #f1f3f4;
    --md-surface-container: #f8f9fa;
    --md-surface-container-high: #e8eaed;
    --md-surface-container-highest: #dadce0;
    --md-on-surface: #1f1f1f;
    --md-on-surface-variant: #5f6368;
    --md-outline: #dadce0;
    --md-outline-variant: #e8eaed;
    --md-error: #dc3545;
    --md-error-container: #fce8e6;
    --md-success: #188038;
    --md-success-container: #e6f4ea;
    --md-warning: #f9ab00;
    --md-warning-container: #fef7e0;
    --md-shadow: rgba(0, 0, 0, 0.08);
    --md-radius-sm: 8px;
    --md-radius-md: 12px;
    --md-radius-lg: 16px;
    --md-radius-xl: 28px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Google Sans', 'Segoe UI', Roboto, sans-serif; background: var(--md-surface-dim); color: var(--md-on-surface); min-height: 100vh; }

/* Header */
.header { background: var(--md-surface); padding: 16px 24px; display: flex; justify-content: space-between; align-items: center; box-shadow: 0 1px 3px var(--md-shadow); position: sticky; top: 0; z-index: 50; }
.header h1 { font-size: 22px; font-weight: 500; color: var(--md-on-surface); }
.header h1 span { color: var(--md-primary); }
.header .nav { display: flex; gap: 8px; align-items: center; }
.header .nav a { color: var(--md-on-surface-variant); text-decoration: none; font-size: 14px; padding: 8px 16px; border-radius: var(--md-radius-xl); transition: all 0.2s; font-weight: 500; }
.header .nav a:hover { background: var(--md-surface-container-high); color: var(--md-on-surface); }
.header .nav a.active { background: var(--md-primary-container); color: var(--md-on-primary-container); }
.header .user-info { color: var(--md-on-surface-variant); font-size: 14px; margin-right: 8px; }

/* Cards */
.card { background: var(--md-surface); border-radius: var(--md-radius-lg); padding: 24px; margin-bottom: 16px; box-shadow: 0 1px 3px var(--md-shadow); }
.card h2 { font-size: 16px; font-weight: 500; color: var(--md-on-surface); margin-bottom: 16px; }

/* Forms */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; color: var(--md-on-surface-variant); margin-bottom: 6px; font-size: 12px; font-weight: 500; letter-spacing: 0.5px; }
.form-input { width: 100%; padding: 12px 16px; border: 1px solid var(--md-outline); border-radius: var(--md-radius-sm); background: var(--md-surface); color: var(--md-on-surface); font-size: 14px; outline: none; transition: border-color 0.2s, box-shadow 0.2s; }
.form-input:focus { border-color: var(--md-primary); box-shadow: 0 0 0 2px var(--md-primary-container); }
.form-input::placeholder { color: var(--md-on-surface-variant); }
select.form-input { cursor: pointer; }

/* Buttons */
.btn { padding: 10px 24px; border: none; border-radius: var(--md-radius-xl); font-size: 14px; font-weight: 500; cursor: pointer; transition: all 0.2s; display: inline-flex; align-items: center; gap: 8px; }
.btn-primary { background: var(--md-primary); color: var(--md-on-primary); }
.btn-primary:hover { background: #1557b0; box-shadow: 0 1px 3px var(--md-shadow); }
.btn-tonal { background: var(--md-primary-container); color: var(--md-on-primary-container); }
.btn-tonal:hover { background: #c0d6f7; }
.btn-outline { background: transparent; color: var(--md-primary); border: 1px solid var(--md-outline); }
.btn-outline:hover { background: var(--md-surface-container); }
.btn-danger { background: var(--md-error); color: #fff; }
.btn-danger:hover { background: #c82333; }
.btn-success { background: var(--md-success); color: #fff; }
.btn-success:hover { background: #137333; }
.btn-small { padding: 6px 16px; font-size: 12px; }
.btn-icon { width: 40px; height: 40px; padding: 0; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; }

/* Tables */
table { width: 100%; border-collapse: collapse; }
th { text-align: left; color: var(--md-on-surface-variant); font-size: 12px; font-weight: 500; padding: 12px 16px; border-bottom: 1px solid var(--md-outline-variant); }
td { padding: 12px 16px; border-bottom: 1px solid var(--md-outline-variant); font-size: 14px; }
tr:hover { background: var(--md-surface-container); }

/* Badges / Chips */
.chip { padding: 4px 12px; border-radius: var(--md-radius-xl); font-size: 11px; font-weight: 500; display: inline-block; }
.chip-admin { background: #fce8e6; color: #c5221f; }
.chip-manager { background: #e8f0fe; color: #1a73e8; }
.chip-packer { background: #e6f4ea; color: #188038; }
.chip-tester { background: #fef7e0; color: #e37400; }
.chip-cleaner { background: #f3e8fd; color: #8430ce; }
.chip-receiver { background: #fef7e0; color: #b06000; }
.chip-shipper { background: #e8f0fe; color: #185abc; }
.chip-odessa { background: #fce8f4; color: #b80672; }
.chip-fixer { background: #e8eaed; color: #5f6368; }
.chip-active { background: var(--md-success-container); color: var(--md-success); }
.chip-inactive { background: var(--md-error-container); color: var(--md-error); }
.chip-on { background: var(--md-success-container); color: var(--md-success); }
.chip-off { background: var(--md-error-container); color: var(--md-error); }

/* Messages */
.msg { padding: 12px 16px; border-radius: var(--md-radius-sm); margin-bottom: 16px; font-size: 14px; }
.msg-success { background: var(--md-success-container); color: var(--md-success); }
.msg-error { background: var(--md-error-container); color: var(--md-error); }

/* Layout */
.container { max-width: 960px; margin: 24px auto; padding: 0 16px; }
.form-row { display: flex; gap: 12px; align-items: end; }
.form-row .form-group { flex: 1; }

/* Modal */
.modal-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.3); z-index: 100; justify-content: center; align-items: center; }
.modal-overlay.active { display: flex; }
.modal { background: var(--md-surface); padding: 28px; border-radius: var(--md-radius-lg); width: 420px; box-shadow: 0 8px 32px rgba(0,0,0,0.15); }
.modal h3 { font-size: 18px; font-weight: 500; color: var(--md-on-surface); margin-bottom: 20px; }

/* Scan Section */
.scan-box { background: var(--md-surface); border-radius: var(--md-radius-lg); padding: 24px; margin-bottom: 16px; box-shadow: 0 1px 3px var(--md-shadow); }
.scan-box label { display: block; color: var(--md-on-surface-variant); margin-bottom: 8px; font-size: 12px; font-weight: 500; letter-spacing: 0.5px; }
.scan-row { display: flex; gap: 12px; }
.scan-row input { flex: 1; padding: 14px 18px; border: 1px solid var(--md-outline); border-radius: var(--md-radius-sm); background: var(--md-surface); color: var(--md-on-surface); font-size: 16px; outline: none; }
.scan-row input:focus { border-color: var(--md-primary); box-shadow: 0 0 0 2px var(--md-primary-container); }
.scan-row button { padding: 14px 28px; background: var(--md-primary); color: var(--md-on-primary); border: none; border-radius: var(--md-radius-xl); font-size: 14px; font-weight: 500; cursor: pointer; }
.scan-row button:hover { background: #1557b0; }

/* Result Card */
.result-card { background: var(--md-surface); border-radius: var(--md-radius-lg); padding: 24px; display: none; box-shadow: 0 1px 3px var(--md-shadow); }
.result-card.active { display: block; }
.result-card.not-found { border: 2px solid var(--md-error); }
.result-card.found { border: 2px solid var(--md-primary); }
.result-header { display: flex; gap: 20px; margin-bottom: 20px; }
.result-image { width: 180px; height: 180px; border-radius: var(--md-radius-md); background: var(--md-surface-container); display: flex; align-items: center; justify-content: center; overflow: hidden; flex-shrink: 0; }
.result-image img { max-width: 100%; max-height: 100%; object-fit: contain; }
.result-image .no-image { color: var(--md-on-surface-variant); font-size: 13px; }
.result-details { flex: 1; }
.detail-row { margin-bottom: 14px; }
.detail-label { color: var(--md-on-surface-variant); font-size: 11px; font-weight: 500; letter-spacing: 0.5px; text-transform: uppercase; }
.detail-value { color: var(--md-on-surface); font-size: 16px; font-weight: 500; margin-top: 2px; }
.detail-value.sku { color: var(--md-primary); font-family: 'Roboto Mono', monospace; font-size: 14px; }
.detail-value.warehouse { color: var(--md-success); font-weight: 600; }

/* Return Notes */
.return-notes { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--md-outline-variant); }
.return-notes h3 { color: var(--md-error); margin-bottom: 12px; font-size: 14px; font-weight: 500; }
.return-note { background: var(--md-error-container); padding: 12px 16px; border-radius: var(--md-radius-sm); margin-bottom: 8px; border-left: 3px solid var(--md-error); }
.return-note .note-header { color: var(--md-on-surface-variant); font-size: 12px; margin-bottom: 4px; }
.return-note .note-text { color: var(--md-on-surface); font-size: 14px; }

/* Action Bar */
.action-bar { margin-top: 20px; display: flex; gap: 12px; flex-wrap: wrap; }

/* Not Found */
.not-found-msg { text-align: center; padding: 40px; }
.not-found-msg h2 { color: var(--md-error); margin-bottom: 8px; font-weight: 500; }
.not-found-msg p { color: var(--md-on-surface-variant); }

/* Loading */
.loading { display: none; text-align: center; padding: 20px; color: var(--md-on-surface-variant); }

/* Login Page */
.login-page { display: flex; justify-content: center; align-items: center; min-height: 100vh; background: var(--md-surface-dim); }
.login-box { background: var(--md-surface); padding: 40px; border-radius: var(--md-radius-lg); width: 380px; box-shadow: 0 2px 8px var(--md-shadow); }
.login-box h1 { color: var(--md-primary); text-align: center; margin-bottom: 4px; font-size: 28px; font-weight: 500; }
.login-box p { color: var(--md-on-surface-variant); text-align: center; margin-bottom: 28px; font-size: 14px; }
.login-box .btn { width: 100%; justify-content: center; padding: 14px; font-size: 15px; }
.error-msg { background: var(--md-error-container); color: var(--md-error); padding: 10px 16px; border-radius: var(--md-radius-sm); margin-bottom: 16px; text-align: center; font-size: 14px; }