@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700&family=Inter:wght@400;500;600&display=swap');

/*
   Shrelix ERP Core Design System
   Modern SaaS Enterprise Design
*/

:root {
    /* Light Theme (Primary) */
    --bg-color: #F8F8FB;
    --surface-color: #FFFFFF;
    --primary-color: #3D3BF3;
    --secondary-color: #7C72FF;
    --accent-glow: #A89CFF;
    --text-primary: #171726;
    --text-secondary: #6B6B8A;
    --border-color: rgba(0, 0, 0, 0.06);
    --danger-color: #ef4444;
    --success-color: #10b981;
    --sidebar-width: 260px;
    --header-height: 70px;
    --font-primary: 'Plus Jakarta Sans', 'Inter', sans-serif;
    --transition-standard: all 300ms cubic-bezier(.22, .61, .36, 1);
}

[data-theme="dark"] {
    /* Dark Theme */
    --bg-color: #09090F;
    --surface-color: #11111B;
    --primary-color: #6C63FF;
    --secondary-color: #8F88FF;
    --text-primary: #FFFFFF;
    --text-secondary: #A0A0C0;
    --border-color: rgba(255, 255, 255, 0.08);
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-weight: 400;
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow-x: hidden;
    /* zoom: 0.8 is applied on desktop via a media query below to prevent mobile breakage */
}

@media (min-width: 993px) {
    body {
        zoom: 0.8; /* Scales entire UI natively down to 80% on desktop only */
    }
}

/* Typography Hierarchy */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition-standard);
}

a:hover {
    color: var(--secondary-color);
}

/* Preloader */
#preloader {
    position: fixed;
    inset: 0;
    background: var(--bg-color);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease;
}

.preloader-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    100% {
        transform: rotate(360deg);
    }
}

/* ═══════════════════════════════════════════════════════
   LAYOUT SYSTEM (Sidebar + Topbar)
   ═══════════════════════════════════════════════════════ */
.erp-layout {
    display: flex;
    min-height: 100vh;
}

/* Floating Glass Sidebar */
.erp-sidebar {
    width: var(--sidebar-width);
    background: var(--surface-color);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 125vh;
    left: 0;
    top: 0;
    z-index: 100;
    transition: var(--transition-standard);
    padding: 1.5rem 1rem;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.02);
}

.sidebar-collapsed .erp-sidebar {
    transform: translateX(-100%);
}

.sidebar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.sidebar-brand h2 {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 1.5rem;
    margin: 0;
}

.sidebar-menu {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    overflow-y: auto;
    padding-right: 5px;
    /* Prevent scrollbar from touching the edge */
}

/* Custom Scrollbar for Sidebar Menu */
.sidebar-menu::-webkit-scrollbar {
    width: 5px;
}

.sidebar-menu::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar-menu::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 10px;
}

.sidebar-menu::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-secondary);
}

.sidebar-menu li a {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition-standard);
}

.sidebar-menu li a:hover {
    background: rgba(61, 59, 243, 0.05);
    color: var(--primary-color);
    transform: translateY(-1px);
}

.sidebar-menu li a.active {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #FFF;
    box-shadow: 0 4px 15px rgba(61, 59, 243, 0.2);
}

.sidebar-menu li a svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Main Content Area */
.erp-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: var(--transition-standard);
    background: var(--bg-color);
}

.sidebar-collapsed .erp-main {
    margin-left: 0;
}

/* Top Navigation */
.erp-header {
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 90;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
}

[data-theme="dark"] .erp-header {
    background: rgba(17, 17, 27, 0.8);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.sidebar-toggle {
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    transition: var(--transition-standard);
}

.sidebar-toggle:hover {
    background: var(--border-color);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Container */
.container {
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    flex: 1;
}

/* ═══════════════════════════════════════════════════════
   COMPONENTS
   ═══════════════════════════════════════════════════════ */

/* Dashboard Cards (Premium Gradients, Soft Shadows) */
.card {
    background: var(--surface-color);
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
    transition: var(--transition-standard);
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.card:focus-within {
    z-index: 50;
}

.card:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transform: translateY(-2px);
    z-index: 2;
}

.card-header {
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: var(--transition-standard);
    position: relative;
    overflow: hidden;
}

.stat-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(61, 59, 243, 0.08);
}

.stat-title {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface-color);
}

.data-table th,
.data-table td {
    padding: 1rem 1.5rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: rgba(61, 59, 243, 0.03);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: sticky;
    top: 0;
    z-index: 10;
}

.data-table tbody tr {
    transition: var(--transition-standard);
}

.data-table tbody tr:hover {
    background: rgba(61, 59, 243, 0.02);
}

/* Status Badges */
.status {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-block;
}

.status.paid {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.status.udhar {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.search-bar {
    display: flex;
    gap: 10px;
    width: 100%;
}

/* Forms */
.form-row {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.form-group {
    margin-bottom: 1.5rem;
    flex: 1;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.form-control,
.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    transition: var(--transition-standard);
}

.form-control:focus,
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(61, 59, 243, 0.1);
    background: var(--surface-color);
}

.form-control[readonly],
.form-group input[readonly],
.form-group textarea[readonly],
.form-control:disabled,
.form-group input:disabled,
.form-group select:disabled,
.form-group textarea:disabled {
    background-color: var(--bg-color) !important;
    color: var(--text-secondary) !important;
    cursor: not-allowed !important;
    border-color: var(--border-color) !important;
    opacity: 0.8;
}

/* Autocomplete Dropdown */
.autocomplete-wrapper {
    position: relative;
    width: 100%;
}

.autocomplete-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 99;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    max-height: 250px;
    overflow-y: auto;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    margin-top: 4px;
}

.autocomplete-item {
    padding: 10px 15px;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition-standard);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.autocomplete-item:last-child {
    border-bottom: none;
}

.autocomplete-item:hover,
.autocomplete-item.active {
    background: rgba(61, 59, 243, 0.05);
    color: var(--primary-color);
}

.autocomplete-meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: var(--bg-color);
    padding: 2px 8px;
    border-radius: 12px;
}


/* Search Bar */
.search-form {
    margin-bottom: 1.5rem;
}

.search-bar {
    display: flex;
    gap: 0.75rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: var(--transition-standard);
    font-family: var(--font-primary);
    text-decoration: none;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #FFF;
    box-shadow: 0 4px 15px rgba(61, 59, 243, 0.2);
}

.btn-primary:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 25px rgba(61, 59, 243, 0.3);
    color: #FFF;
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

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

.btn-danger {
    background: transparent;
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
}

.btn-danger:hover {
    background: var(--danger-color);
    color: #FFF;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    border-radius: 8px;
}

/* Auth Pages */
.auth-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-color), #E8E8FA);
    padding: 1rem;
}

[data-theme="dark"] .auth-body {
    background: linear-gradient(135deg, var(--bg-color), #1A1A2E);
}

.auth-container {
    width: 100%;
    max-width: 480px;
}

.auth-card {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 3rem;
    width: 100%;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .auth-card {
    background: rgba(17, 17, 27, 0.9);
}

.auth-card h1 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.auth-link {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Messages */
.error-messages {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--danger-color);
}

.success-message {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--success-color);
}

/* Modals & Toasts */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-standard);
}

.modal.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--surface-color);
    padding: 2rem;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    transform: scale(0.9);
    transition: var(--transition-standard);
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.modal.show .modal-content {
    transform: scale(1);
}

/* Bill Create / Sale / Purchase Forms */
.form-section {
    background: var(--surface-color);
    padding: 1.5rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.item-row {
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    margin-bottom: 1rem;
    padding: 1rem;
    background: var(--bg-color);
    border-radius: 12px;
    flex-wrap: wrap;
    border: 1px solid var(--border-color);
    position: relative;
    z-index: 1;
}

.item-row:focus-within {
    z-index: 50;
}

.item-row .form-group {
    margin-bottom: 0;
}

.bill-summary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1.5rem;
    border-radius: 16px;
    margin-bottom: 1.5rem;
    box-shadow: 0 8px 25px rgba(61, 59, 243, 0.3);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    font-size: 1.1rem;
}

.summary-row.total {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    margin-top: 0.5rem;
    padding-top: 1rem;
    font-weight: 700;
    font-size: 1.3rem;
}

/* Footer */
.footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

/* Utilities */
.flex {
    display: flex;
}

.justify-between {
    justify-content: space-between;
}

.items-center {
    align-items: center;
}

/* Responsive */
@media (max-width: 992px) {
    .erp-sidebar {
        transform: translateX(-100%);
    }

    .erp-main {
        margin-left: 0;
    }

    .sidebar-open .erp-sidebar {
        transform: translateX(0);
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 1rem;
    }

    .item-row {
        flex-direction: column;
    }

    .item-row .form-group {
        width: 100%;
    }

    .card-header {
        flex-direction: column;
        align-items: flex-start !important;
        gap: 1rem;
    }

    .search-form {
        max-width: 100% !important;
        width: 100% !important;
    }
}

/* ═══════════════════════════════════════════════════════
   FLATPICKR CUSTOM THEME OVERRIDES
   ═══════════════════════════════════════════════════════ */
.flatpickr-calendar {
    background: var(--surface-color) !important;
    border: 1px solid var(--border-color) !important;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15) !important;
    border-radius: 12px !important;
    padding: 10px !important;
    font-family: var(--font-primary) !important;
}

.flatpickr-calendar.arrowTop:before,
.flatpickr-calendar.arrowTop:after {
    border-bottom-color: var(--surface-color) !important;
}
.flatpickr-calendar.arrowBottom:before,
.flatpickr-calendar.arrowBottom:after {
    border-top-color: var(--surface-color) !important;
}

.flatpickr-months .flatpickr-month {
    background: transparent !important;
    color: var(--text-primary) !important;
    fill: var(--text-primary) !important;
}

.flatpickr-current-month .flatpickr-monthDropdown-months,
.flatpickr-current-month input.cur-year {
    color: var(--text-primary) !important;
    background: transparent !important;
    font-weight: 600 !important;
}

.flatpickr-current-month .flatpickr-monthDropdown-months:hover {
    background: var(--bg-color) !important;
}

.flatpickr-current-month .flatpickr-monthDropdown-months .flatpickr-monthDropdown-month {
    background-color: var(--surface-color) !important;
    color: var(--text-primary) !important;
}

.flatpickr-months .flatpickr-prev-month,
.flatpickr-months .flatpickr-next-month {
    color: var(--text-primary) !important;
    fill: var(--text-primary) !important;
}
.flatpickr-months .flatpickr-prev-month:hover svg,
.flatpickr-months .flatpickr-next-month:hover svg {
    fill: var(--primary-color) !important;
}

span.flatpickr-weekday {
    color: var(--text-secondary) !important;
    font-weight: 600 !important;
}

.flatpickr-days {
    border: none !important;
}
.flatpickr-day {
    color: var(--text-primary) !important;
    border-radius: 8px !important;
    border: 1px solid transparent !important;
    transition: var(--transition-standard) !important;
}

.flatpickr-day:hover,
.flatpickr-day:focus {
    background: var(--bg-color) !important;
    border-color: var(--border-color) !important;
}

.flatpickr-day.today {
    border-color: var(--primary-color) !important;
    background: rgba(61, 59, 243, 0.1) !important;
}

.flatpickr-day.selected,
.flatpickr-day.startRange,
.flatpickr-day.endRange,
.flatpickr-day.selected.inRange,
.flatpickr-day.startRange.inRange,
.flatpickr-day.endRange.inRange,
.flatpickr-day.selected:focus,
.flatpickr-day.startRange:focus,
.flatpickr-day.endRange:focus,
.flatpickr-day.selected:hover,
.flatpickr-day.startRange:hover,
.flatpickr-day.endRange:hover,
.flatpickr-day.selected.prevMonthDay,
.flatpickr-day.startRange.prevMonthDay,
.flatpickr-day.endRange.prevMonthDay,
.flatpickr-day.selected.nextMonthDay,
.flatpickr-day.startRange.nextMonthDay,
.flatpickr-day.endRange.nextMonthDay {
    background: var(--primary-color) !important;
    color: #fff !important;
    border-color: var(--primary-color) !important;
    box-shadow: 0 4px 10px rgba(61, 59, 243, 0.3) !important;
}

.flatpickr-day.flatpickr-disabled,
.flatpickr-day.flatpickr-disabled:hover,
.flatpickr-day.prevMonthDay,
.flatpickr-day.nextMonthDay,
.flatpickr-day.notAllowed,
.flatpickr-day.notAllowed.prevMonthDay,
.flatpickr-day.notAllowed.nextMonthDay {
    color: var(--text-secondary) !important;
    opacity: 0.5 !important;
}