/* === SnackFlow — Clean Modern Design === */
:root {
    --color-primary: #0d9488;
    --color-primary-dark: #0f766e;
    --color-primary-light: #ccfbf1;
    --color-primary-50: #f0fdfa;
    --color-primary-glow: rgba(13,148,136,0.12);
    --color-accent: #f97316;
    --color-accent-light: #fff7ed;
    --color-success: #16a34a;
    --color-success-light: #dcfce7;
    --color-danger: #dc2626;
    --color-danger-light: #fef2f2;
    --color-warning: #d97706;
    --color-warning-light: #fffbeb;
    --color-info: #0284c7;
    --color-info-light: #e0f2fe;
    --color-bg: #f8fafb;
    --color-surface: #ffffff;
    --color-border: #e8ecf0;
    --color-border-light: #f1f4f7;
    --color-text: #1a2332;
    --color-text-secondary: #526070;
    --color-text-light: #8896a4;
    --radius: 10px;
    --radius-sm: 7px;
    --radius-lg: 14px;
    --shadow-xs: 0 1px 2px rgba(0,0,0,.04);
    --shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.03);
    --shadow-md: 0 4px 16px rgba(0,0,0,.06), 0 1px 4px rgba(0,0,0,.03);
    --shadow-lg: 0 8px 30px rgba(0,0,0,.08), 0 2px 8px rgba(0,0,0,.04);
    --transition: 0.18s ease;
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', Roboto, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-dark); }
hr { border: none; border-top: 1px solid var(--color-border); }

/* === Navigation === */
.main-nav {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0 1.25rem;
    position: sticky;
    top: 0;
    z-index: 100;
}
.nav-inner {
    max-width: 1120px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-brand {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
    flex: 1;
}
.nav-brand a {
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.nav-brand a:hover { color: var(--color-text); text-decoration: none; }
.nav-brand-logo {
    width: 30px;
    height: 30px;
    border-radius: 7px;
    flex-shrink: 0;
}
.nav-toggle {
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 1.15rem;
    padding: 0.35rem 0.6rem;
    cursor: pointer;
    display: block;
    color: var(--color-text-secondary);
    transition: all var(--transition);
    line-height: 1;
}
.nav-toggle:hover { background: var(--color-bg); color: var(--color-text); }
.nav-links {
    list-style: none;
    display: none;
    flex-direction: column;
    padding-bottom: 0.75rem;
    gap: 1px;
}
.nav-links.open { display: flex; }
.nav-links li a {
    display: block;
    padding: 0.55rem 0.75rem;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition);
}
.nav-links li a:hover {
    color: var(--color-primary);
    background: var(--color-primary-50);
    text-decoration: none;
}
.nav-links li a.active {
    color: var(--color-primary);
    background: var(--color-primary-50);
    font-weight: 600;
}
.nav-user {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.55rem 0.75rem;
    margin-top: 0.25rem;
    border-top: 1px solid var(--color-border);
}
.nav-user span {
    color: var(--color-text-light);
    font-size: 0.85rem;
}
.nav-user .btn {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

/* === Container === */
.container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 1.5rem 1.25rem;
    flex: 1;
    width: 100%;
}

h1 {
    margin-bottom: 1.25rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.02em;
}
h2 {
    margin-bottom: 0.875rem;
    font-size: 1.1rem;
    font-weight: 650;
    color: var(--color-text);
    letter-spacing: -0.01em;
}
h3 { font-size: 1rem; font-weight: 600; }

/* === Alerts === */
.alert {
    padding: 0.8rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    animation: alertIn 0.25s ease-out;
}
@keyframes alertIn {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}
.alert-success { background: var(--color-success-light); color: #15803d; border: 1px solid #bbf7d0; }
.alert-error { background: var(--color-danger-light); color: #b91c1c; border: 1px solid #fecaca; }
.alert-warning { background: var(--color-warning-light); color: #92400e; border: 1px solid #fde68a; }
.alert-info { background: var(--color-info-light); color: #075985; border: 1px solid #bae6fd; }

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.55rem 1.1rem;
    font-size: 0.85rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition);
    line-height: 1.4;
    white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: scale(0.98); }
.btn-primary {
    background: var(--color-primary);
    color: #fff;
}
.btn-primary:hover { background: var(--color-primary-dark); color: #fff; }
.btn-success { background: var(--color-success); color: #fff; }
.btn-success:hover { background: #15803d; color: #fff; }
.btn-danger { background: var(--color-danger); color: #fff; }
.btn-danger:hover { background: #b91c1c; color: #fff; }
.btn-warning { background: var(--color-warning); color: #fff; }
.btn-warning:hover { background: #b45309; color: #fff; }
.btn-outline {
    background: var(--color-surface);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}
.btn-outline:hover { background: var(--color-bg); border-color: #d0d7de; color: var(--color-text); }
.btn-sm { padding: 0.35rem 0.7rem; font-size: 0.78rem; border-radius: 6px; }
.btn-lg { padding: 0.75rem 1.5rem; font-size: 0.95rem; }
.btn-block { display: flex; width: 100%; }

/* === Dashboard === */
.dashboard-greeting {
    margin-bottom: 1.75rem;
}
.dashboard-greeting h1 {
    margin-bottom: 0.15rem;
    font-size: 1.4rem;
}
.dashboard-greeting p {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.875rem;
    margin-bottom: 2rem;
}
.dash-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem 1.25rem;
    text-align: center;
    box-shadow: var(--shadow-xs);
    transition: all var(--transition);
    text-decoration: none;
    color: var(--color-text);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}
.dash-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    text-decoration: none;
    border-color: var(--color-primary-light);
    color: var(--color-text);
}
.dash-card .icon {
    font-size: 1.75rem;
    line-height: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 12px;
}
.dash-card .label { font-weight: 700; font-size: 1rem; }
.dash-card .text-muted { font-size: 0.8rem; }

.dash-card.card-purchase .icon { background: #ede9fe; }
.dash-card.card-refill .icon { background: var(--color-success-light); }
.dash-card.card-revenue .icon { background: var(--color-accent-light); }
.dash-card.card-report .icon { background: var(--color-info-light); }

/* === Cards === */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin-bottom: 1.25rem;
    box-shadow: var(--shadow-xs);
}

/* === Forms === */
.form-group {
    margin-bottom: 1rem;
}
.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.3rem;
    font-size: 0.82rem;
    color: var(--color-text-secondary);
}
.form-control {
    display: block;
    width: 100%;
    padding: 0.6rem 0.8rem;
    font-size: 0.9rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text);
    line-height: 1.4;
    transition: all var(--transition);
}
.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}
.form-control::placeholder { color: var(--color-text-light); }
select.form-control { appearance: auto; }
textarea.form-control { resize: vertical; min-height: 76px; }

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
}
.form-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1.25rem;
    flex-wrap: wrap;
}

/* Checkbox grid */
.checkbox-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2px;
    background: var(--color-bg);
    border-radius: var(--radius-sm);
    padding: 0.625rem;
}
.checkbox-grid label {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-weight: 400;
    padding: 0.45rem 0.5rem;
    font-size: 0.875rem;
    border-radius: 6px;
    cursor: pointer;
    transition: background var(--transition);
    text-transform: none;
    letter-spacing: normal;
    color: var(--color-text);
}
.checkbox-grid label:hover { background: var(--color-surface); }
.checkbox-grid input[type="checkbox"] {
    width: 1rem;
    height: 1rem;
    flex-shrink: 0;
    accent-color: var(--color-primary);
    cursor: pointer;
}

/* === Tables === */
.table-wrap {
    overflow-x: auto;
    margin-bottom: 1rem;
    -webkit-overflow-scrolling: touch;
    background: var(--color-surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow-xs);
    border: 1px solid var(--color-border);
}
table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}
th, td {
    text-align: left;
    padding: 0.65rem 0.875rem;
    white-space: nowrap;
}
th {
    background: var(--color-bg);
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--color-border);
}
td { border-bottom: 1px solid var(--color-border-light); }
tbody tr { transition: background var(--transition); }
tbody tr:hover { background: #f8fafb; }
tbody tr:last-child td { border-bottom: none; }
tfoot th {
    background: var(--color-bg);
    border-top: 2px solid var(--color-border);
    border-bottom: none;
}

.text-right { text-align: right; }
.text-center { text-align: center; }
.text-muted { color: var(--color-text-light); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }

.actions { display: flex; gap: 0.35rem; flex-wrap: nowrap; }

/* === Filter bar === */
.filter-bar {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}
.filter-bar .form-control { width: auto; flex: 1; min-width: 140px; }

/* === KPI Grid === */
.kpi-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.875rem;
    margin-bottom: 1.75rem;
}
.kpi-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.125rem 1rem;
    text-align: center;
    box-shadow: var(--shadow-xs);
}
.kpi-card .kpi-value {
    font-size: 1.5rem;
    font-weight: 750;
    letter-spacing: -0.02em;
    line-height: 1.2;
    color: var(--color-text);
}
.kpi-card .kpi-label {
    font-size: 0.75rem;
    color: var(--color-text-light);
    margin-top: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    font-weight: 500;
}

/* === Badges === */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.15rem 0.55rem;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 9999px;
    line-height: 1.4;
    letter-spacing: 0.02em;
}
.badge-success { background: var(--color-success-light); color: #15803d; }
.badge-danger { background: var(--color-danger-light); color: #b91c1c; }
.badge-info { background: var(--color-info-light); color: #075985; }
.badge-warning { background: var(--color-warning-light); color: #92400e; }
.badge-ok { background: var(--color-success-light); color: #15803d; }

/* === Login === */
.login-wrap {
    max-width: 400px;
    margin: 0 auto;
    padding: 0 1.25rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 100vh;
}
.login-wrap .card {
    padding: 2.25rem 1.75rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}
.login-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--color-primary), #14b8a6);
    border-radius: 14px;
    margin: 0 auto 1.25rem;
    font-size: 1.5rem;
    color: #fff;
}
.login-wrap h1 {
    text-align: center;
    font-size: 1.35rem;
    margin-bottom: 0.2rem;
}
.login-wrap .subtitle {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: 1.75rem;
    font-size: 0.9rem;
}

/* === Scanner === */
.scanner-area {
    position: relative;
    margin-bottom: 1rem;
}
.scanner-area video {
    width: 100%;
    max-height: 300px;
    border-radius: var(--radius);
    background: #000;
    object-fit: cover;
}

/* === Footer === */
.main-footer {
    text-align: center;
    padding: 1.25rem;
    color: var(--color-text-light);
    font-size: 0.78rem;
    margin-top: auto;
    border-top: 1px solid var(--color-border-light);
}

/* === Empty state === */
.empty-state {
    text-align: center;
    padding: 2.5rem 1rem;
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* === Section divider === */
.section-divider { margin: 1rem 0; border-color: var(--color-border); }

/* === Dark Mode Toggle === */
.theme-toggle {
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 0.3rem 0.55rem;
    font-size: 1.05rem;
    line-height: 1;
    color: var(--color-text-secondary);
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.theme-toggle:hover { background: var(--color-bg); color: var(--color-text); }

/* === Dark Mode === */
[data-theme="dark"] {
    --color-primary: #2dd4bf;
    --color-primary-dark: #14b8a6;
    --color-primary-light: #1a3a38;
    --color-primary-50: #0d2625;
    --color-primary-glow: rgba(45,212,191,0.15);
    --color-accent: #fb923c;
    --color-accent-light: #2a1f14;
    --color-success: #4ade80;
    --color-success-light: #14291e;
    --color-danger: #f87171;
    --color-danger-light: #2d1518;
    --color-warning: #fbbf24;
    --color-warning-light: #2a2210;
    --color-info: #38bdf8;
    --color-info-light: #0f2030;
    --color-bg: #0f1419;
    --color-surface: #1a2029;
    --color-border: #2a3342;
    --color-border-light: #222b38;
    --color-text: #e2e8f0;
    --color-text-secondary: #94a3b8;
    --color-text-light: #64748b;
    --shadow-xs: 0 1px 2px rgba(0,0,0,.2);
    --shadow: 0 1px 3px rgba(0,0,0,.25);
    --shadow-md: 0 4px 16px rgba(0,0,0,.3);
    --shadow-lg: 0 8px 30px rgba(0,0,0,.4);
}
[data-theme="dark"] .badge-success { background: #14291e; color: #4ade80; }
[data-theme="dark"] .badge-danger { background: #2d1518; color: #f87171; }
[data-theme="dark"] .badge-info { background: #0f2030; color: #38bdf8; }
[data-theme="dark"] .badge-warning { background: #2a2210; color: #fbbf24; }
[data-theme="dark"] .badge-ok { background: #14291e; color: #4ade80; }
[data-theme="dark"] .alert-success { background: #14291e; color: #4ade80; border-color: #1a3a28; }
[data-theme="dark"] .alert-error { background: #2d1518; color: #f87171; border-color: #3d1f22; }
[data-theme="dark"] .alert-warning { background: #2a2210; color: #fbbf24; border-color: #3a3018; }
[data-theme="dark"] .alert-info { background: #0f2030; color: #38bdf8; border-color: #1a3048; }
[data-theme="dark"] tbody tr:hover { background: #1e2736; }
[data-theme="dark"] .nav-brand-logo { box-shadow: 0 2px 8px rgba(45,212,191,0.2); }
[data-theme="dark"] .dash-card:hover { border-color: var(--color-primary); }
[data-theme="dark"] .dash-card.card-purchase .icon { background: #1e1633; }
[data-theme="dark"] .dash-card.card-refill .icon { background: #14291e; }
[data-theme="dark"] .dash-card.card-revenue .icon { background: #2a1f14; }
[data-theme="dark"] .dash-card.card-report .icon { background: #0f2030; }
[data-theme="dark"] .login-wrap .card { background: var(--color-surface); }
[data-theme="dark"] .theme-toggle { border-color: var(--color-border); color: var(--color-text-secondary); }
[data-theme="dark"] .theme-toggle:hover { background: var(--color-border); color: var(--color-text); }

/* === Responsive === */
@media (min-width: 640px) {
    .dashboard-grid { grid-template-columns: repeat(2, 1fr); }
    .form-row { grid-template-columns: 1fr 1fr; }
    .checkbox-grid { grid-template-columns: 1fr 1fr; }
    .kpi-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 768px) {
    .nav-toggle { display: none; }
    .nav-links {
        display: flex !important;
        flex-direction: row;
        align-items: center;
        padding-bottom: 0;
        gap: 2px;
    }
    .nav-links li a { padding: 0.45rem 0.75rem; }
    .main-nav { padding: 0 1.5rem; }
    .nav-brand { flex: 0; }
    .nav-user {
        margin-left: auto;
        border-top: none;
        padding: 0.45rem 0.75rem;
    }
    .dashboard-grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }
    .container { padding: 1.75rem 1.5rem; }
}

@media (min-width: 1024px) {
    .dashboard-grid { grid-template-columns: repeat(4, 1fr); }
}

/* === Print header (hidden on screen) === */
.print-header { display: none; }

/* === Print === */
@media print {
    /* Hide UI elements */
    .main-nav, .main-footer, .filter-bar, .form-actions,
    .btn, .nav-toggle, .theme-toggle, .alert { display: none !important; }

    /* Reset colors and layout */
    html, html[data-theme="dark"] { --color-bg: #fff; --color-surface: #fff; --color-text: #111; --color-text-secondary: #444; --color-text-light: #666; --color-border: #ccc; --color-border-light: #ddd; }
    body { background: #fff !important; color: #111 !important; font-size: 11pt; }
    .container { max-width: 100%; padding: 0; }

    /* Show print header */
    .print-header {
        display: block !important;
        text-align: center;
        padding-bottom: 1rem;
        margin-bottom: 1.5rem;
        border-bottom: 2px solid #111;
    }
    .print-header-brand { font-size: 18pt; font-weight: 800; letter-spacing: -0.02em; }
    .print-header-title { font-size: 13pt; font-weight: 600; margin-top: 0.2rem; }
    .print-header-date { font-size: 9pt; color: #666; margin-top: 0.3rem; }

    /* KPI grid for print */
    .kpi-grid { grid-template-columns: repeat(4, 1fr) !important; gap: 0.5rem; margin-bottom: 1rem; }
    .kpi-card { border: 1px solid #ccc; box-shadow: none; padding: 0.6rem 0.5rem; break-inside: avoid; }
    .kpi-card .kpi-value { font-size: 12pt; color: #111 !important; }
    .kpi-card .kpi-label { font-size: 7pt; }

    /* Tables for print */
    .table-wrap { box-shadow: none; border: 1px solid #999; break-inside: avoid; }
    table { font-size: 9pt; }
    th { background: #f0f0f0 !important; color: #111 !important; font-size: 7.5pt; }
    td, th { padding: 0.35rem 0.5rem; }
    tbody tr:hover { background: transparent !important; }

    /* Colors in print */
    .text-success { color: #16a34a !important; }
    .text-danger { color: #dc2626 !important; }
    .badge { border: 1px solid #ccc; background: #f5f5f5 !important; color: #333 !important; font-size: 7pt; }

    /* Headings */
    h1 { font-size: 14pt; display: none; }
    h2 { font-size: 11pt; margin-bottom: 0.5rem; margin-top: 1rem; }

    /* Page settings */
    @page { margin: 1.5cm; size: A4 landscape; }
}