/* ============================================================
   EASY CRM — Design System (Slate + Electric Blue)
   Modern SaaS Dashboard · Inter + Manrope · Lucide Icons
   ============================================================ */

/* ===== Design Tokens ===== */
:root {
    /* Color palette — Slate + Electric Blue */
    --color-bg:             #F8FAFC;
    --color-surface:        #FFFFFF;
    --color-sidebar:        #0F172A;
    --color-sidebar-hover:  #1E293B;
    --color-sidebar-active: rgba(37, 99, 235, 0.15);
    --color-sidebar-text:   #94A3B8;
    --color-sidebar-text-active: #FFFFFF;

    --color-primary:        #2563EB;
    --color-primary-hover:  #1D4ED8;
    --color-primary-light:  #DBEAFE;
    --color-primary-glow:   rgba(37, 99, 235, 0.08);

    --color-text:           #0F172A;
    --color-text-secondary: #475569;
    --color-text-muted:     #64748B;
    --color-text-placeholder: #94A3B8;

    --color-border:         #E2E8F0;
    --color-border-hover:   #CBD5E1;

    --color-success:        #16A34A;
    --color-success-bg:     #F0FDF4;
    --color-success-border: #BBF7D0;

    --color-warning:        #F59E0B;
    --color-warning-bg:     #FFFBEB;
    --color-warning-border: #FDE68A;

    --color-danger:         #DC2626;
    --color-danger-bg:      #FEF2F2;
    --color-danger-border:  #FECACA;

    --color-info:           #2563EB;
    --color-info-bg:        #EFF6FF;

    /* Backwards compat aliases */
    --color-bg-card:        var(--color-surface);
    --color-bg-sidebar:     var(--color-sidebar);
    --color-bg-input:       var(--color-surface);

    /* Typography */
    --font-body:     'Inter', 'Noto Sans Bengali', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-headings: 'Manrope', 'Noto Sans Bengali', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono:     'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

    /* Spacing */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */

    /* Border radius */
    --radius-sm:  6px;
    --radius:     8px;
    --radius-md:  10px;
    --radius-lg:  12px;
    --radius-xl:  16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-xs:  0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm:  0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow:     0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-md:  0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-lg:  0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --shadow-focus: 0 0 0 3px rgba(37, 99, 235, 0.2);
    --shadow-danger-focus: 0 0 0 3px rgba(220, 38, 38, 0.2);

    /* Transitions */
    --transition-fast: 120ms ease;
    --transition:      150ms ease;
    --transition-slow: 250ms ease;

    /* Sidebar dimensions */
    --sidebar-width: 260px;
}


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

html, body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-headings);
    color: var(--color-text);
    font-weight: 700;
    line-height: 1.3;
}

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

code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--color-primary-light);
    color: var(--color-primary);
    padding: 0.15em 0.4em;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

::selection {
    background: var(--color-primary-light);
    color: var(--color-primary-hover);
}


/* ===== App Layout ===== */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* ===== Sidebar (Dark) ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--color-sidebar);
    padding: var(--space-6) 0;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 100;
    transition: transform var(--transition-slow);
    overflow-y: auto;
    overflow-x: hidden;
    border-right: 1px solid rgba(255,255,255,0.06);
}

.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 4px; }

.sidebar-brand {
    padding: 0 var(--space-6) var(--space-6);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    margin-bottom: var(--space-4);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.sidebar-brand h2 {
    font-size: 1.2rem;
    font-weight: 800;
    color: #FFFFFF;
    letter-spacing: -0.02em;
}

.sidebar-brand span {
    font-size: 0.65rem;
    color: var(--color-sidebar-text);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: block;
    margin-top: var(--space-1);
}

.sidebar-brand img {
    max-height: 40px;
    max-width: 100%;
    object-fit: contain;
    margin-bottom: var(--space-2);
}

/* Sidebar navigation */
.sidebar-nav {
    flex: 1;
    padding: 0 var(--space-3);
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: 2px;
}

.sidebar-nav a,
.sidebar-nav button.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius);
    color: var(--color-sidebar-text);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition);
    border: none;
    background: none;
    cursor: pointer;
    width: 100%;
    text-align: left;
    line-height: 1.5;
}

.sidebar-nav a:hover,
.sidebar-nav button.nav-link:hover {
    background: var(--color-sidebar-hover);
    color: var(--color-sidebar-text-active);
}

.sidebar-nav a.active {
    background: var(--color-sidebar-active);
    color: var(--color-sidebar-text-active);
}

.sidebar-nav a.active .nav-icon {
    color: var(--color-primary);
}

.sidebar-subnav {
    list-style: none;
    padding-left: var(--space-6);
    margin-top: 2px;
    margin-bottom: var(--space-1);
}

.sidebar-subnav li {
    margin-bottom: 1px;
}

.sidebar-subnav a {
    padding: 6px var(--space-3);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-sidebar-text);
}

.sidebar-subnav a:hover {
    color: var(--color-sidebar-text-active);
    background: var(--color-sidebar-hover);
}

.sidebar-subnav a.active {
    color: var(--color-sidebar-text-active);
    background: var(--color-sidebar-active);
}

/* Dropdown toggle */
.nav-link-dropdown-toggle {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius);
    color: var(--color-sidebar-text);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition);
    border: none;
    background: none;
    cursor: pointer;
    width: 100%;
    text-align: left;
}

.nav-link-dropdown-toggle:hover {
    background: var(--color-sidebar-hover);
    color: var(--color-sidebar-text-active);
}

.nav-link-dropdown-toggle.active {
    color: var(--color-sidebar-text-active);
}

.dropdown-arrow {
    margin-left: auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--color-sidebar-text);
    transition: transform var(--transition), color var(--transition);
}

.dropdown-arrow i,
.dropdown-arrow svg {
    width: 18px;
    height: 18px;
    stroke-width: 2.5;
}

.sidebar-nav .nav-icon {
    width: 18px;
    height: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--color-sidebar-text);
    transition: color var(--transition);
}

.sidebar-nav .nav-icon i[data-lucide] {
    width: 18px;
    height: 18px;
}

/* Sidebar section labels */
.sidebar-section-label {
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(148, 163, 184, 0.5);
    padding: var(--space-4) var(--space-4) var(--space-2);
}

/* Sidebar footer */
.sidebar-footer {
    padding: var(--space-5);
    border-top: 1px solid rgba(255,255,255,0.08);
    margin-top: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.sidebar-footer .user-info {
    font-size: 0.8rem;
    color: var(--color-sidebar-text);
}

.sidebar-footer .user-name {
    color: #FFFFFF;
    font-weight: 600;
    font-size: 0.875rem;
    display: block;
    margin-bottom: 2px;
}

.sidebar-footer .btn {
    margin-top: var(--space-3);
    color: var(--color-sidebar-text);
    border-color: rgba(255,255,255,0.15);
    background: transparent;
    font-size: 0.8rem;
}
.sidebar-footer .btn:hover {
    color: #FFFFFF;
    border-color: rgba(255,255,255,0.3);
    background: var(--color-sidebar-hover);
}

/* Mobile sidebar toggle */
.sidebar-toggle {
    display: none;
    position: fixed;
    top: var(--space-4);
    left: var(--space-4);
    z-index: 200;
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}
.sidebar-toggle:hover {
    background: var(--color-bg);
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
    backdrop-filter: blur(2px);
}


/* ===== Main Content ===== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: var(--space-8) var(--space-10);
    min-height: 100vh;
    max-width: 100%;
}


/* ===== Page Header ===== */
.page-header {
    margin-bottom: var(--space-8);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--space-4);
}

.page-header h1 {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    color: var(--color-text);
}

.page-header p {
    color: var(--color-text-muted);
    margin-top: var(--space-1);
    font-size: 0.9rem;
    line-height: 1.5;
}


/* ===== Cards ===== */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    box-shadow: var(--shadow-xs);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.card:hover {
    border-color: var(--color-border-hover);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border);
}

.card-header h3 {
    font-size: 1rem;
    font-weight: 700;
    font-family: var(--font-headings);
    color: var(--color-text);
}


/* ===== Stats Grid ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-8);
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5) var(--space-6);
    box-shadow: var(--shadow-xs);
    transition: all var(--transition);
    position: relative;
}

.stat-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-sm);
}

.stat-card .stat-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-3);
    background: var(--color-primary-glow);
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 600;
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-text);
    margin-top: var(--space-1);
    font-family: var(--font-headings);
    letter-spacing: -0.03em;
    line-height: 1.2;
}


/* ===== Section Headers ===== */
.section-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-1);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text);
}

.section-header i[data-lucide] {
    width: 18px;
    height: 18px;
    color: var(--color-text-muted);
}

.section-description {
    color: var(--color-text-muted);
    font-size: 0.8125rem;
    margin-bottom: var(--space-5);
    line-height: 1.5;
}


/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid transparent;
    text-decoration: none;
    line-height: 1.5;
    white-space: nowrap;
    outline: none;
}

.btn:focus-visible {
    box-shadow: var(--shadow-focus);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn i[data-lucide] {
    width: 16px;
    height: 16px;
}

/* Primary */
.btn-primary {
    background: var(--color-primary);
    color: #FFFFFF;
    border-color: var(--color-primary);
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.btn-primary:active:not(:disabled) {
    background: #1e40af;
}

/* Secondary / outline */
.btn-secondary,
.btn-outline {
    background: var(--color-surface);
    color: var(--color-text-secondary);
    border-color: var(--color-border);
}

.btn-secondary:hover:not(:disabled),
.btn-outline:hover:not(:disabled) {
    background: var(--color-bg);
    border-color: var(--color-border-hover);
    color: var(--color-text);
}

/* Ghost */
.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
    background: var(--color-bg);
    color: var(--color-text);
}

/* Success */
.btn-success {
    background: var(--color-success);
    color: #FFFFFF;
    border-color: var(--color-success);
}

.btn-success:hover:not(:disabled) {
    background: #15803d;
}

/* Danger */
.btn-danger {
    background: transparent;
    color: var(--color-danger);
    border-color: var(--color-danger);
}

.btn-danger:hover:not(:disabled) {
    background: var(--color-danger-bg);
}

.btn-danger:focus-visible {
    box-shadow: var(--shadow-danger-focus);
}

/* Danger filled */
.btn-danger-filled {
    background: var(--color-danger);
    color: #FFFFFF;
    border-color: var(--color-danger);
}

.btn-danger-filled:hover:not(:disabled) {
    background: #b91c1c;
}

/* Button sizes */
.btn-xs {
    padding: 0.2rem 0.5rem;
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
    gap: var(--space-1);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
    border-radius: var(--radius);
}

.btn-lg {
    padding: 0.625rem 1.25rem;
    font-size: 0.9375rem;
}

.btn-block {
    width: 100%;
}

/* Icon button */
.btn-icon {
    padding: 0.5rem;
    gap: 0;
}

.btn-icon.btn-sm {
    padding: 0.375rem;
}

.btn-icon.btn-xs {
    padding: 0.25rem;
}


/* ===== Forms ===== */
.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.form-label .text-danger {
    color: var(--color-danger);
}

.form-input,
input.form-input,
select.form-input,
textarea.form-input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
    line-height: 1.5;
}

.form-input:hover:not(:focus):not(:disabled) {
    border-color: var(--color-border-hover);
}

.form-input:focus {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-focus);
}

.form-input::placeholder {
    color: var(--color-text-placeholder);
}

.form-input:disabled,
.form-input[readonly] {
    background: var(--color-bg);
    color: var(--color-text-muted);
    cursor: not-allowed;
}

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

select.form-input {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.25rem;
}

/* Compact form inputs for inline table usage */
.form-input-sm,
.form-input.form-input-sm {
    padding: 0.3rem 0.5rem;
    font-size: 0.8125rem;
}

/* Utility: text alignment */
.text-right { text-align: right; }
.text-left  { text-align: left; }
.text-center { text-align: center; }

/* Utility: flex justify */
.justify-center  { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-end     { justify-content: flex-end; }

/* Form helper text */
.form-hint {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: var(--space-1);
    display: block;
}

/* Checkbox */
input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary);
    cursor: pointer;
    border-radius: 4px;
}

/* Validation messages */
.validation-message {
    color: var(--color-danger);
    font-size: 0.75rem;
    margin-top: var(--space-1);
    font-weight: 500;
}


/* ===== Filter Bar ===== */
.filter-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-4);
    align-items: flex-end;
}

.filter-bar .form-group {
    margin-bottom: 0;
}


/* ===== Tabs ===== */
.tab-bar {
    display: flex;
    border-bottom: 1px solid var(--color-border);
    padding: 0 var(--space-4);
    background: var(--color-surface);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.tab-bar::-webkit-scrollbar { height: 0; }

.tab-btn {
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    outline: none;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: -1px;
}

.tab-btn:hover {
    color: var(--color-text-secondary);
}

.tab-btn.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.tab-btn i[data-lucide] {
    width: 16px;
    height: 16px;
}

.tab-content {
    padding: var(--space-6);
}


/* ===== Tables ===== */
.table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: var(--space-3) var(--space-4);
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg);
    white-space: nowrap;
}

td {
    padding: var(--space-3) var(--space-4);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
    font-weight: 500;
    vertical-align: middle;
}

tr:last-child td {
    border-bottom: none;
}

tbody tr {
    transition: background var(--transition-fast);
}

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


/* ===== Badges ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    white-space: nowrap;
}

.badge-pending {
    background: var(--color-warning-bg);
    color: #92400E;
}

.badge-active {
    background: var(--color-success-bg);
    color: #166534;
}

.badge-rejected,
.badge-inactive {
    background: var(--color-danger-bg);
    color: #991B1B;
}

.badge-trial,
.badge-info {
    background: var(--color-info-bg);
    color: var(--color-primary);
}

.badge-neutral {
    background: var(--color-bg);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}


/* ===== Alerts ===== */
.alert {
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius);
    font-size: 0.875rem;
    margin-bottom: var(--space-4);
    border: 1px solid transparent;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    line-height: 1.5;
}

.alert-error {
    background: var(--color-danger-bg);
    color: var(--color-danger);
    border-color: var(--color-danger-border);
}

.alert-success {
    background: var(--color-success-bg);
    color: var(--color-success);
    border-color: var(--color-success-border);
}

.alert-info {
    background: var(--color-info-bg);
    color: var(--color-primary);
    border-color: var(--color-primary-light);
}

.alert-warning {
    background: var(--color-warning-bg);
    color: #92400E;
    border-color: var(--color-warning-border);
}


/* ===== Modals ===== */
.modal-overlay,
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    animation: fadeIn 150ms ease;
}

.modal-content,
.modal {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 700px;
    max-height: 85vh;
    overflow-y: auto;
    padding: var(--space-6);
    position: relative;
    animation: slideUp 200ms ease;
}

.modal-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    background: none;
    border: none;
    padding: var(--space-2);
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--color-text-muted);
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--color-bg);
    color: var(--color-text);
}


/* ===== Auth Pages ===== */
.auth-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--space-8);
    background: var(--color-bg);
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-10);
    box-shadow: var(--shadow-md);
}

.auth-card .brand {
    text-align: center;
    margin-bottom: var(--space-8);
}

.auth-card .brand h1 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
}

.auth-card .brand p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-top: var(--space-2);
    font-weight: 500;
}

.auth-footer {
    text-align: center;
    margin-top: var(--space-6);
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.auth-footer a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 700;
}

.auth-footer a:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}


/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: var(--space-12) var(--space-8);
    color: var(--color-text-muted);
}

.empty-state .icon,
.empty-state .empty-state-icon {
    margin-bottom: var(--space-4);
    color: var(--color-text-placeholder);
}

.empty-state .icon i[data-lucide],
.empty-state .empty-state-icon i[data-lucide] {
    width: 48px;
    height: 48px;
    stroke-width: 1.5;
}

.empty-state h3 {
    font-size: 1.125rem;
    color: var(--color-text);
    margin-bottom: var(--space-2);
    font-weight: 700;
}

.empty-state p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    max-width: 360px;
    margin: 0 auto;
    line-height: 1.6;
}


/* ===== Loading ===== */
.loading-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--color-bg);
    color: var(--color-text-muted);
    gap: var(--space-4);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

.spinner-sm {
    width: 18px;
    height: 18px;
    border-width: 2px;
    display: inline-block;
    margin-bottom: 0;
    vertical-align: middle;
}

.spinner-xs {
    width: 14px;
    height: 14px;
    border-width: 2px;
    display: inline-block;
    margin-bottom: 0;
    vertical-align: middle;
}


/* ===== Skeleton Loading ===== */
.skeleton {
    background: linear-gradient(90deg, var(--color-bg) 25%, #e8ecf0 50%, var(--color-bg) 75%);
    background-size: 200% 100%;
    animation: skeleton-pulse 1.5s ease-in-out infinite;
    border-radius: var(--radius);
}

.skeleton-text {
    height: 14px;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-2);
}

.skeleton-text.w-3\/4 { width: 75%; }
.skeleton-text.w-1\/2 { width: 50%; }
.skeleton-text.w-1\/3 { width: 33%; }

.skeleton-card {
    height: 100px;
    border-radius: var(--radius-lg);
}

.skeleton-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
}

@keyframes skeleton-pulse {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}


/* ===== Pagination ===== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-3);
    padding: var(--space-4);
    border-top: 1px solid var(--color-border);
}

.pagination-info {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-weight: 500;
}

.pagination-controls {
    display: flex;
    gap: var(--space-1);
}


/* ===== Grid Layouts ===== */
.grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
}

/* Highlighted settings section card/wrapper */
.settings-group {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
    align-items: start;
}


/* ===== Danger Zone ===== */
.danger-zone {
    border: 1px solid var(--color-danger-border);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    background: var(--color-danger-bg);
}

.danger-zone h4 {
    color: var(--color-danger);
    font-size: 0.9375rem;
    margin-bottom: var(--space-2);
}


/* ===== Upload / Drop zones ===== */
.upload-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--color-bg);
    padding: var(--space-6);
    border-radius: var(--radius-lg);
    border: 1.5px dashed var(--color-border);
    transition: border-color var(--transition);
    text-align: center;
}

.upload-zone:hover {
    border-color: var(--color-primary);
}


/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 200ms ease;
}

.animate-slide-up {
    animation: slideUp 200ms ease;
}


/* ===== Utility Classes ===== */
.text-muted    { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-danger   { color: var(--color-danger); }
.text-success  { color: var(--color-success); }
.text-warning  { color: var(--color-warning); }
.text-primary  { color: var(--color-primary); }

.font-mono     { font-family: var(--font-mono); }
.font-semibold { font-weight: 600; }
.font-bold     { font-weight: 700; }

.mt-1 { margin-top: var(--space-2); }
.mt-2 { margin-top: var(--space-4); }
.mt-3 { margin-top: var(--space-6); }
.mb-1 { margin-bottom: var(--space-2); }
.mb-2 { margin-bottom: var(--space-4); }
.mb-3 { margin-bottom: var(--space-6); }
.ml-2 { margin-left: var(--space-4); }

.gap-sm  { gap: var(--space-2); }
.gap-md  { gap: var(--space-4); }
.gap-lg  { gap: var(--space-6); }

.flex          { display: flex; }
.flex-col      { display: flex; flex-direction: column; }
.items-center  { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap     { flex-wrap: wrap; }
.flex-1        { flex: 1; }

.w-full { width: 100%; }
.truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}


/* ===== Blazor Error UI ===== */
.blazor-error-ui {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-3) var(--space-4);
    background: var(--color-danger-bg);
    color: var(--color-danger);
    border-top: 1px solid var(--color-danger-border);
    z-index: 9999;
    text-align: center;
    font-size: 0.875rem;
    font-weight: 500;
}

.blazor-error-ui .dismiss {
    cursor: pointer;
    margin-left: var(--space-4);
    font-weight: bold;
}


/* ===== Responsive ===== */

/* Tablet */
@media (max-width: 1024px) {
    .main-content {
        padding: var(--space-6) var(--space-6);
    }
    
    .grid-2 {
        grid-template-columns: 1fr;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

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

    .sidebar-toggle {
        display: flex;
    }

    .sidebar-overlay.show {
        display: block;
    }

    .main-content {
        margin-left: 0;
        padding: var(--space-6) var(--space-4);
        padding-top: calc(var(--space-6) + 56px); /* Space for hamburger */
    }

    .page-header {
        flex-direction: column;
        gap: var(--space-3);
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

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

    .filter-bar {
        grid-template-columns: 1fr;
    }

    .grid-layout,
    .grid-3 {
        grid-template-columns: 1fr;
    }

    .auth-card {
        padding: var(--space-6);
    }

    .tab-bar {
        padding: 0 var(--space-2);
    }

    .tab-btn {
        padding: var(--space-3) var(--space-3);
        font-size: 0.8125rem;
    }

    table {
        font-size: 0.8125rem;
    }

    th, td {
        padding: var(--space-2) var(--space-3);
    }
}

/* Small mobile */
@media (max-width: 480px) {
    .main-content {
        padding: var(--space-4) var(--space-3);
        padding-top: calc(var(--space-4) + 56px);
    }

    .stat-value {
        font-size: 1.5rem;
    }
}