/* ============================================
   IMS Invoice Tracker — Design System
   Mobile-first, minimal, Linear/Stripe-inspired
   ============================================ */

:root {
    --color-bg: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-bg-tertiary: #f1f3f5;
    --color-surface: #ffffff;
    --color-border: #e1e4e8;
    --color-border-light: #eef0f2;
    --color-text: #1a1a2e;
    --color-text-secondary: #6b7280;
    --color-text-muted: #9ca3af;
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-primary-light: #eff6ff;
    --color-success: #059669;
    --color-success-light: #ecfdf5;
    --color-warning: #d97706;
    --color-warning-light: #fffbeb;
    --color-danger: #dc2626;
    --color-danger-light: #fef2f2;
    --color-info: #0891b2;
    --color-info-light: #ecfeff;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Inter, Roboto, sans-serif;
    --font-mono: 'SF Mono', SFMono-Regular, Consolas, 'Liberation Mono', monospace;
    --transition: 150ms ease;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-bg: #0f1117;
        --color-bg-secondary: #181a20;
        --color-bg-tertiary: #1e2028;
        --color-surface: #1a1c24;
        --color-border: #2d3039;
        --color-border-light: #252830;
        --color-text: #e4e5e9;
        --color-text-secondary: #9ca0ab;
        --color-text-muted: #6b6f7b;
        --color-primary: #5b8def;
        --color-primary-hover: #4a7de0;
        --color-primary-light: #1a2744;
        --color-success-light: #0d2818;
        --color-warning-light: #2a1f08;
        --color-danger-light: #2a0f0f;
        --color-info-light: #0a1f2a;
        --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
        --shadow-md: 0 4px 6px rgba(0,0,0,0.3);
        --shadow-lg: 0 10px 15px rgba(0,0,0,0.3);
    }
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ── Layout ────────────────────────────────── */
.app-shell {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-header {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0 1rem;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-header .logo {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.app-header .logo span {
    color: var(--color-primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-badge {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    background: var(--color-bg-secondary);
    padding: 0.25rem 0.6rem;
    border-radius: var(--radius-sm);
}

.app-main {
    flex: 1;
    padding: 1rem;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

/* ── Navigation (mobile bottom nav) ────────── */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-around;
    padding: 0.5rem 0;
    padding-bottom: calc(0.5rem + env(safe-area-inset-bottom));
    z-index: 100;
}

.bottom-nav a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    text-decoration: none;
    color: var(--color-text-muted);
    font-size: 0.65rem;
    font-weight: 500;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: color var(--transition);
}

.bottom-nav a.active,
.bottom-nav a:hover {
    color: var(--color-primary);
}

.bottom-nav svg {
    width: 22px;
    height: 22px;
}

.nav-spacer {
    height: calc(70px + env(safe-area-inset-bottom));
}

/* ── Typography ────────────────────────────── */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.section-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-sm { font-size: 0.85rem; }
.text-xs { font-size: 0.75rem; }
.font-mono { font-family: var(--font-mono); }

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

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border-light);
}

/* ── Stat Cards (Dashboard) ────────────────── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1rem;
    text-align: center;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.25rem;
}

.stat-card.primary .stat-value { color: var(--color-primary); }
.stat-card.success .stat-value { color: var(--color-success); }
.stat-card.warning .stat-value { color: var(--color-warning); }
.stat-card.info .stat-value { color: var(--color-info); }

/* ── Buttons ───────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.65rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition);
    white-space: nowrap;
    min-height: 44px;
    font-family: inherit;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}
.btn-primary:hover { background: var(--color-primary-hover); }

.btn-secondary {
    background: var(--color-bg-secondary);
    color: var(--color-text);
    border-color: var(--color-border);
}
.btn-secondary:hover { background: var(--color-bg-tertiary); }

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}
.btn-danger:hover { opacity: 0.9; }

.btn-success {
    background: var(--color-success);
    color: #fff;
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
    padding: 0.5rem;
}
.btn-ghost:hover { color: var(--color-text); background: var(--color-bg-secondary); }

.btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
    min-height: 34px;
}

.btn-lg {
    padding: 0.85rem 1.5rem;
    font-size: 1rem;
    min-height: 52px;
}

.btn-block {
    display: flex;
    width: 100%;
}

/* ── Forms ──────────────────────────────────── */
.form-group {
    margin-bottom: 1rem;
}

.form-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 0.35rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.65rem 0.85rem;
    font-size: 1rem;
    font-family: inherit;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color var(--transition), box-shadow var(--transition);
    min-height: 44px;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-textarea { min-height: 80px; resize: vertical; }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.form-hint {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

/* ── Alerts ────────────────────────────────── */
.alert {
    padding: 0.85rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.alert-success { background: var(--color-success-light); color: var(--color-success); border: 1px solid var(--color-success); }
.alert-error   { background: var(--color-danger-light); color: var(--color-danger); border: 1px solid var(--color-danger); }
.alert-warning { background: var(--color-warning-light); color: var(--color-warning); border: 1px solid var(--color-warning); }
.alert-info    { background: var(--color-info-light); color: var(--color-info); border: 1px solid var(--color-info); }

/* ── Status Badges ─────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.6rem;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 999px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.badge-draft      { background: var(--color-bg-tertiary); color: var(--color-text-secondary); }
.badge-in_progress { background: var(--color-primary-light); color: var(--color-primary); }
.badge-completed  { background: var(--color-success-light); color: var(--color-success); }
.badge-delivered  { background: var(--color-info-light); color: var(--color-info); }
.badge-cancelled  { background: var(--color-danger-light); color: var(--color-danger); }

.badge-admin  { background: #fef3c7; color: #92400e; }
.badge-staff  { background: var(--color-primary-light); color: var(--color-primary); }
.badge-viewer { background: var(--color-bg-tertiary); color: var(--color-text-secondary); }

/* ── Progress / Stage Tracker ──────────────── */
.stage-tracker {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin: 1rem 0;
}

.stage-step {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    position: relative;
    padding-bottom: 1.25rem;
}

.stage-step:last-child { padding-bottom: 0; }

.stage-dot-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex-shrink: 0;
    position: relative;
}

.stage-dot {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 700;
    border: 2px solid var(--color-border);
    background: var(--color-bg);
    color: var(--color-text-muted);
    z-index: 1;
}

.stage-step.completed .stage-dot {
    background: var(--color-success);
    border-color: var(--color-success);
    color: #fff;
}

.stage-step.current .stage-dot {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

.stage-line {
    position: absolute;
    top: 28px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: calc(100% - 16px);
    background: var(--color-border);
}

.stage-step.completed .stage-line {
    background: var(--color-success);
}

.stage-step:last-child .stage-line { display: none; }

.stage-info {
    padding-top: 0.2rem;
    flex: 1;
    min-width: 0;
}

.stage-name {
    font-size: 0.85rem;
    font-weight: 600;
}

.stage-meta {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* ── Progress bar (compact) ────────────────── */
.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--color-bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
    margin: 0.5rem 0;
}

.progress-bar-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: 3px;
    transition: width 0.4s ease;
}

/* ── Tables ────────────────────────────────── */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0 -1.25rem;
    padding: 0 1.25rem;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

th {
    text-align: left;
    padding: 0.6rem 0.75rem;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

td {
    padding: 0.7rem 0.75rem;
    border-bottom: 1px solid var(--color-border-light);
    vertical-align: middle;
}

tr:hover td {
    background: var(--color-bg-secondary);
}

.table-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}
.table-link:hover { text-decoration: underline; }

/* ── Invoice list (mobile card layout) ─────── */
.invoice-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.invoice-card {
    display: block;
    text-decoration: none;
    color: inherit;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0.85rem 1rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.invoice-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.invoice-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.4rem;
}

.invoice-card-number {
    font-weight: 600;
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

.invoice-card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.78rem;
    color: var(--color-text-secondary);
}

/* ── Photo Grid ────────────────────────────── */
.photo-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
    margin: 0.75rem 0;
}

.photo-thumb {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.photo-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.photo-thumb .photo-delete {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(0,0,0,0.6);
    color: #fff;
    border: none;
    font-size: 0.75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition);
}

.photo-thumb:hover .photo-delete { opacity: 1; }

.upload-zone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition);
    min-height: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.upload-zone svg { width: 32px; height: 32px; color: var(--color-text-muted); }
.upload-zone p { font-size: 0.85rem; color: var(--color-text-secondary); }

/* ── Timeline ──────────────────────────────── */
.timeline {
    padding-left: 1.25rem;
    border-left: 2px solid var(--color-border);
    margin: 1rem 0;
}

.timeline-item {
    position: relative;
    padding-bottom: 1rem;
    padding-left: 1rem;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -1.35rem;
    top: 0.3rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--color-border);
    border: 2px solid var(--color-bg);
}

.timeline-item.pass::before { background: var(--color-success); }
.timeline-item.fail::before { background: var(--color-danger); }

.timeline-date {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

.timeline-action {
    font-size: 0.85rem;
    font-weight: 500;
}

.timeline-user {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

/* ── Pagination ────────────────────────────── */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.4rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.pagination a, .pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 0.5rem;
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.pagination a:hover { background: var(--color-bg-secondary); }
.pagination .active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* ── Login Page ────────────────────────────── */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: var(--color-bg-secondary);
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 2rem 1.5rem;
    box-shadow: var(--shadow-lg);
}

.login-logo {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
}

/* ── Parties grid ──────────────────────────── */
.parties-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.party-card {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
}

.party-card .party-role {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-text-muted);
    margin-bottom: 0.25rem;
}

.party-card .party-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.party-card .party-detail {
    font-size: 0.78rem;
    color: var(--color-text-secondary);
}

/* ── Batch table ───────────────────────────── */
.batch-group {
    margin-bottom: 1.25rem;
}

.batch-group-header {
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.5rem 0;
    border-bottom: 2px solid var(--color-primary);
    margin-bottom: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.batch-pedido {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

/* ── Search / Filter bar ───────────────────── */
.filter-bar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.filter-bar .form-input,
.filter-bar .form-select {
    min-height: 40px;
    font-size: 0.85rem;
}

.filter-bar .form-input { flex: 1; min-width: 150px; }
.filter-bar .form-select { width: auto; min-width: 120px; }

/* ── Empty state ───────────────────────────── */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--color-text-muted);
}

.empty-state svg {
    width: 48px;
    height: 48px;
    margin-bottom: 0.75rem;
    opacity: 0.4;
}

/* ── Utilities ─────────────────────────────── */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.w-full { width: 100%; }
.hidden { display: none !important; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ── Responsive ────────────────────────────── */
@media (min-width: 640px) {
    .parties-grid { grid-template-columns: 1fr 1fr; }
    .photo-grid { grid-template-columns: repeat(4, 1fr); }
    .stats-grid { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 768px) {
    .app-main { padding: 1.5rem 2rem; }
    .form-row { grid-template-columns: 1fr 1fr 1fr; }
    .parties-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (min-width: 1024px) {
    .bottom-nav { display: none; }
    .nav-spacer { display: none; }
    .app-header { padding: 0 2rem; }
    .desktop-nav {
        display: flex !important;
        gap: 0.25rem;
    }
    .desktop-nav a {
        padding: 0.4rem 0.75rem;
        border-radius: var(--radius-sm);
        font-size: 0.85rem;
        color: var(--color-text-secondary);
        text-decoration: none;
        font-weight: 500;
        transition: all var(--transition);
    }
    .desktop-nav a:hover,
    .desktop-nav a.active {
        color: var(--color-text);
        background: var(--color-bg-secondary);
    }
}

@media (max-width: 1023px) {
    .desktop-nav { display: none !important; }
}