/* ============================================================================
   assets/css/app.css — HMIS St. Peter's University
   ============================================================================ */

:root {
    --color-primary:      #b35900;
    --color-primary-dark: #15803D;
    --color-success:      #b35900;
    --color-danger:       #DC2626;
    --color-warning:      #D97706;
    --color-info:         #2563EB;

    --bg-page:    #F8FAFC;
    --bg-card:    #FFFFFF;
    --bg-topbar:  #FFFFFF;
    --bg-sidebar: #FFFFFF;

    --text-sidebar:        #374151;
    --text-sidebar-muted:  #9CA3AF;
    --text-sidebar-active: #FFFFFF;
    --bg-sidebar-active:   var(--color-primary);
    --bg-sidebar-hover:    #F3F4F6;

    --border-color:  #E5E7EB;
    --text-primary:  #111827;
    --text-muted:    #6B7280;
    --brand-text:    #111827;

    --topbar-height:           64px;
    --sidebar-width:           240px;
    --sidebar-width-collapsed: 75px;
}

[data-theme="dark"] {
    --bg-page:    #0F172A;
    --bg-card:    #1E293B;
    --bg-topbar:  #1E293B;
    --bg-sidebar: #0F172A;

    --text-sidebar:       #CBD5E1;
    --text-sidebar-muted: #64748B;
    --bg-sidebar-hover:   #1E293B;

    --border-color: #334155;
    --text-primary: #F1F5F9;
    --text-muted:   #94A3B8;
    --brand-text:   #F1F5F9;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; padding: 0; }

body {
    font-family: 'Inter', 'Segoe UI', Roboto, Arial, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.6;
}

a { text-decoration: none; }

a:focus-visible, button:focus-visible,
input:focus-visible, select:focus-visible, textarea:focus-visible {
    outline: 2px solid var(--color-info);
    outline-offset: 2px;
}

/* ============================================================================
   TOPBAR
   ============================================================================ */
.app-topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: var(--topbar-height);
    background-color: var(--bg-topbar);
    border-bottom: 1px solid var(--border-color);
    z-index: 300;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0 1.25rem;
}

/* ============================================================================
   SIDEBAR
   ============================================================================ */
.app-sidebar {
    position: fixed;
    top: var(--topbar-height);
    left: 0; bottom: 0;
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    overflow-x: hidden;
    transition: width 250ms ease;
    z-index: 200;
    margin-left: 10px;
    margin-right: 10px;
}

.sidebar-collapsed .app-sidebar {
    width: var(--sidebar-width-collapsed);
}

/* ============================================================================
   TOPBAR BRAND
   ============================================================================ */
.topbar-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    font-weight: 700;
    color: var(--brand-text);
    font-size: 0.95rem;
    transition: width 250ms ease, min-width 250ms ease;
    overflow: hidden;
    white-space: nowrap;
}

.sidebar-collapsed .topbar-brand { display: none; }
.sidebar-collapsed .topbar-brand span.label { display: none; }
.sidebar-collapsed .topbar-brand img,
.sidebar-collapsed .topbar-brand > i.bi-building { display: none; }

.topbar-brand i { color: var(--color-primary); font-size: 1.2rem; flex-shrink: 0; }
.topbar-brand img { height: 30px; width: auto; object-fit: contain; flex-shrink: 0; }

/* Collapsed sidebar logo */
.sidebar-logo-collapsed {
    display: none;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 4px;
}
.sidebar-collapsed .sidebar-logo-collapsed { display: flex; }

/* Topbar divider */
.topbar-divider {
    width: 1px;
    height: 28px;
    background-color: var(--border-color);
    flex-shrink: 0;
}
.sidebar-collapsed .topbar-divider { display: none; }

/* ============================================================================
   MAIN CONTENT
   ============================================================================ */
.app-main {
    margin-left: var(--sidebar-width);
    padding-top: var(--topbar-height);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: margin-left 250ms ease;
    padding-left: 10px;
}
.sidebar-collapsed .app-main { margin-left: var(--sidebar-width-collapsed); }
.app-content { flex: 1; padding: 1.5rem; }
.app-footer {
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
}

/* ============================================================================
   SIDEBAR NAVIGATION
   ============================================================================ */
.sidebar-section-label {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-sidebar-muted);
    padding: 1rem 1rem 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    border-bottom: 1px solid #E2E8F0;
}

.sidebar-nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0.7rem;
    color: var(--text-sidebar);
    font-weight: 350;
    white-space: nowrap;
    overflow: hidden;
    border-radius: 12px;
    margin-right: 10px;
    margin-left: 10px;
    margin-top: 4px;
}
.sidebar-nav-item:hover { background-color: var(--bg-sidebar-hover); color: var(--text-primary); }
.sidebar-nav-item.active { background-color: var(--bg-sidebar-active); color: var(--text-sidebar-active); }
.sidebar-nav-item i { width: 1.25rem; text-align: center; flex-shrink: 0; }

.sidebar-collapsed .sidebar-nav-item span.label,
.sidebar-collapsed .sidebar-section-label { display: none; }

/* ============================================================================
   CARDS
   ============================================================================ */
.card { background-color: var(--bg-card); border: 1px solid var(--border-color); border-radius: 0.5rem; }
.card-header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 0.875rem 1.25rem;
    font-size: 0.9rem;
    border-radius: 0.5rem 0.5rem 0 0;
}
.stat-card { border-radius: 0.75rem; padding: 1.25rem; }
.stat-card .stat-icon { width: 44px; height: 44px; border-radius: 0.5rem; display: flex; align-items: center; justify-content: center; font-size: 1.25rem; }
.stat-card .stat-value { font-size: 1.5rem; font-weight: 700; }
.stat-card .stat-label { font-size: 0.8rem; color: var(--text-muted); }

/* ============================================================================
   TABLES
   ============================================================================ */
table.table { color: var(--text-primary); }
table thead th { font-size: 13px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-muted); }
.table-responsive-wrapper { overflow-x: auto; }
.table-empty-state { text-align: center; padding: 3rem 1rem; color: var(--text-muted); }

[data-theme="dark"] .table { color: var(--text-primary); border-color: var(--border-color); }
[data-theme="dark"] .table > :not(caption) > * > * { background-color: transparent; color: var(--text-primary); border-color: var(--border-color); }
[data-theme="dark"] .table-hover tbody tr:hover { background-color: rgba(255,255,255,0.04); }

/* ============================================================================
   FORMS & BUTTONS
   ============================================================================ */
.form-label { font-weight: 500; font-size: 14px; }
.form-control, .form-select { background-color: var(--bg-card); color: var(--text-primary); border-color: var(--border-color); }
.btn-brand { background-color: var(--color-primary); color: #fff; border: 1px solid var(--color-primary); }
.btn-brand:hover, .btn-brand:focus { background-color: var(--color-primary-dark); border-color: var(--color-primary-dark); color: #fff; }
.avatar-circle { background-color: var(--color-primary); color: #fff; border-radius: 50%; width: 36px; height: 36px; border: none; flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-weight: 600; }

/* ============================================================================
   AUTH SPLIT LAYOUT
   ============================================================================ */
.auth-split-shell {
    --auth-accent: #0E7490; --auth-accent-dark: #0B5563; --auth-accent-darker: #0A4A4F;
    min-height: 100vh; display: flex; background-colo: #E5E7EB; position: relative;
}
[data-theme="dark"] .auth-split-shell { background-color: #0F172A; }
.auth-split-toggle { position: absolute; top: 1.25rem; right: 1.25rem; z-index: 10; width: 40px; height: 40px; border-radius: 50%; background: #fff; border: none; display: flex; align-items: center; justify-content: center; box-shadow: 0 2px 6px rgba(0,0,0,0.15); }
.auth-split-left { flex: 1; display: flex; align-items: center; justify-content: center; padding: 2rem; }
.auth-split-card { width: 100%; max-width: 420px; backgroun: #fff; border-radius: 0.75rem; overflow: hidden; box-shado: 0 10px 25px rgba(0,0,0,0.08); }
.auth-split-card-header { background: #b35900; color: #fff; padding: 1rem 1.75rem; border-radius: 20px;}
.auth-split-card-header .brand-row { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; }
.auth-split-card-header .brand-icon { width: 40px; height: 40px; background: rgba(255,255,255,0.15); border-radius: 0.5rem; display: flex; align-items: center; justify-content: center; font-size: 1.25rem; }
.auth-split-card-header .brand-title { font-weight: 700; font-size: 0.85rem; letter-spacing: 0.03em; text-transform: uppercase; margin: 0; }
.auth-split-card-header .brand-subtitle { font-size: 0.75rem; opacity: 0.85; margin: 0; }
.auth-split-card-header h2 { font-size: 1.4rem; font-weight: 700; margin: 0; }
.auth-split-card-header p { font-size: 0.85rem; opacity: 0.9; margin: 0.15rem 0 0; }
.auth-split-card-body { padding: 1.75rem; }
.auth-split-card-footer { text-align: center; font-size: 0.75rem; color: var(--text-muted); padding: 0 1.75rem 1.5rem; }
.btn-auth-accent { background-color: var(--auth-accent); border-color: var(--auth-accent); color: #fff; font-weight: 600; }
.btn-auth-accent:hover, .btn-auth-accent:focus { background-color: var(--auth-accent-dark); border-color: var(--auth-accent-dark); color: #fff; }
.text-auth-accent { color: var(--auth-accent) !important; }
.link-auth-accent { color: var(--auth-accent); }
.auth-split-right {
    flex: 1;
    background: linear-gradient(160deg, var(--auth-accent-dark), var(--auth-accent-darker));
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 3rem 4rem;
    position: relative;
    overflow: hidden;
}
.auth-split-right::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(160deg, rgba(11,85,99,0.82) 0%, rgba(10,74,79,0.78) 100%);
    z-index: 0;
}
.auth-split-right::after { display: none; }
.auth-split-right > * { position: relative; z-index: 1; }
.auth-split-right .right-icon { width: 56px; height: 56px; background: rgba(255,255,255,0.15); border-radius: 0.75rem; display: flex; align-items: center; justify-content: center; font-size: 1.75rem; margin-bottom: 1.5rem; }
.auth-split-right h1 { font-size: 1.9rem; font-weight: 700; margin-bottom: 0.25rem; text-shadow: 0 1px 4px rgba(0,0,0,0.3); }
.auth-split-right .right-subtitle { opacity: 0.9; margin-bottom: 2rem; }
.auth-feature { display: flex; gap: 1rem; margin-bottom: 1.5rem; position: relative; z-index: 1; }
.auth-feature .feature-icon { width: 40px; height: 40px; flex-shrink: 0; background: rgba(255,255,255,0.15); border-radius: 0.5rem; display: flex; align-items: center; justify-content: center; }
.auth-feature .feature-title { font-weight: 600; margin: 0 0 0.15rem; text-shadow: 0 1px 3px rgba(0,0,0,0.2); }
.auth-feature .feature-text { font-size: 0.85rem; opacity: 0.85; margin: 0; }
@media (max-width: 991px) { .auth-split-right { display: none; } }

/* ============================================================================
   UTILITIES & DARK MODE
   ============================================================================ */
.text-muted-app { color: var(--text-muted) !important; }
.skip-link { position: absolute; left: -9999px; top: 0; background: #fff; padding: 0.5rem 1rem; z-index: 3000; }
.skip-link:focus { left: 1rem; top: 1rem; }
.page-heading { margin-bottom: 1.5rem; }
.content-title { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); }
.content-subtitle { font-size: 0.875rem; color: var(--text-muted); margin-top: 0.15rem; margin-bottom: 0; }
.form-text { font-size: 12px; color: var(--text-muted); }
.icon-accent { color: var(--color-primary); }

[data-theme="dark"] .card { border-color: var(--border-color); }
[data-theme="dark"] .card-header { background: var(--bg-card); border-color: var(--border-color); }
[data-theme="dark"] .app-topbar { background-color: var(--bg-topbar); }
[data-theme="dark"] .auth-split-card { background-color: var(--bg-card); }

/* ============================================================================
   DESKTOP COLLAPSED SIDEBAR TOOLTIPS
   ============================================================================ */
.sidebar-collapsed .sidebar-nav-item { position: relative; }

.sidebar-collapsed .sidebar-nav-item::after {
    content: attr(data-label);
    position: fixed;
    left: calc(var(--sidebar-width-collapsed) + 10px + 10px);
    top: auto;
    margin-top: -11px;
    background: #1F2937;
    color: #F9FAFB;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    padding: 5px 10px;
    border-radius: 6px;
    pointer-events: none;
    opacity: 0;
    transition: opacity 150ms ease;
    z-index: 9999;
    box-shadow: 0 4px 12px rgba(0,0,0,0.18);
}
.sidebar-collapsed .sidebar-nav-item::before {
    content: '';
    position: fixed;
    left: calc(var(--sidebar-width-collapsed) + 10px + 4px);
    top: auto;
    margin-top: -5px;
    border: 5px solid transparent;
    border-right-color: #1F2937;
    pointer-events: none;
    opacity: 0;
    transition: opacity 150ms ease;
    z-index: 9999;
}
.sidebar-collapsed .sidebar-nav-item:hover::after,
.sidebar-collapsed .sidebar-nav-item:hover::before { opacity: 1; }

[data-theme="dark"] .sidebar-collapsed .sidebar-nav-item::after { background: #334155; color: #F1F5F9; }
[data-theme="dark"] .sidebar-collapsed .sidebar-nav-item::before { border-right-color: #334155; }

/* ============================================================================
   MOBILE — ≤ 768px
   Sidebar is icon-only by default; toggle opens full overlay.
   ============================================================================ */
@media (max-width: 768px) {

    /* Sidebar: collapsed icon-only by default */
    .app-sidebar {
        width: var(--sidebar-width-collapsed) !important;
        z-index: 400;
        margin-left: 0;
        margin-right: 0;
        transition: width 250ms ease;
    }

    /* Full overlay when open */
    .mobile-sidebar-open .app-sidebar {
        width: var(--sidebar-width) !important;
        box-shadow: 4px 0 24px rgba(0,0,0,0.18);
    }

    /* Labels/sections hidden by default */
    .app-sidebar .sidebar-nav-item span.label,
    .app-sidebar .sidebar-section-label { display: none; }

    /* Visible when open */
    .mobile-sidebar-open .app-sidebar .sidebar-nav-item span.label,
    .mobile-sidebar-open .app-sidebar .sidebar-section-label { display: block; }

    /* Collapsed logo on mobile */
    .sidebar-logo-collapsed { display: flex; }
    .mobile-sidebar-open .sidebar-logo-collapsed { display: none; }

    /* Content offset = collapsed sidebar width */
    .app-main {
        margin-left: var(--sidebar-width-collapsed) !important;
        padding-left: 0;
    }

    /* Backdrop */
    .mobile-sidebar-backdrop {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.45);
        z-index: 399;
    }
    .mobile-sidebar-open .mobile-sidebar-backdrop { display: block; }

    /* Topbar */
    .app-topbar { padding: 0 0.75rem; gap: 0.5rem; }
    .topbar-brand { width: auto; min-width: auto; flex-shrink: 1; }
    .topbar-brand span.label { max-width: 110px; overflow: hidden; text-overflow: ellipsis; font-size: 0.8rem; }
    .topbar-divider { display: none; }
    .app-content { padding: 1rem 0.75rem; }

    /* No CSS tooltips on mobile — mobile-tooltip.js handles it */
    .app-sidebar .sidebar-nav-item::after,
    .app-sidebar .sidebar-nav-item::before { display: none !important; }

    /* Page heading stacking */
    .page-heading .d-flex.justify-content-between { flex-direction: column; gap: 0.75rem; }

    /* Tables */
    .table-responsive-wrapper { -webkit-overflow-scrolling: touch; }

    /* Filter inputs */
    .card-header .row > [class*="col-md-"] { width: 100%; }

    /* Modals */
    .modal-dialog { margin: 0.5rem; }
}

@media (max-width: 480px) {
    .content-title { font-size: 1.2rem; }
    .topbar-brand span.label { max-width: 80px; font-size: 0.75rem; }
    .topbar-brand img { height: 24px; }
    .btn[aria-label="Notifications"] { display: none; }
    .modal-dialog { margin: 0.25rem; }
}

/* ============================================================================
   DARK MODE — comprehensive overrides
   ============================================================================ */
[data-theme="dark"] {
    color-scheme: dark;

    .card, .modal-content { background-color: var(--bg-card); border-color: var(--border-color); color: var(--text-primary); }
    .card-header, .card-footer { background-color: var(--bg-card); border-color: var(--border-color); color: var(--text-primary); }
    .card-body { color: var(--text-primary); }

    .stat-card { background-color: var(--bg-card); }
    .stat-value { color: var(--text-primary); }
    .stat-label { color: var(--text-muted); }

    .text-muted, .text-muted-app { color: var(--text-muted) !important; }
    .content-title  { color: var(--text-primary); }
    .content-subtitle { color: var(--text-muted); }
    h1,h2,h3,h4,h5,h6 { color: var(--text-primary); }
    p, span, li, dt, dd, label, small { color: inherit; }

    .form-control, .form-select, .form-check-input { background-color: #0F172A; border-color: var(--border-color); color: var(--text-primary); }
    .form-control:focus, .form-select:focus { background-color: #0F172A; border-color: var(--color-primary); color: var(--text-primary); box-shadow: 0 0 0 0.2rem rgba(16,185,129,0.2); }
    .form-control::placeholder { color: var(--text-muted); }
    .form-label { color: var(--text-primary); }
    .form-text  { color: var(--text-muted); }
    .input-group-text { background-color: #1E293B; border-color: var(--border-color); color: var(--text-primary); }

    .btn-outline-secondary { color: var(--text-primary); border-color: var(--border-color); }
    .btn-outline-secondary:hover { background-color: #1E293B; color: var(--text-primary); }
    .btn-light { background-color: #1E293B; border-color: var(--border-color); color: var(--text-primary); }
    .btn-close { filter: invert(1) grayscale(100%) brightness(200%); }

    .table { color: var(--text-primary); border-color: var(--border-color); }
    .table > :not(caption) > * > * { background-color: transparent; color: var(--text-primary); border-color: var(--border-color); }
    .table thead th { color: var(--text-muted); }
    .table-hover > tbody > tr:hover > * { background-color: rgba(255,255,255,0.04); color: var(--text-primary); }
    .table-striped > tbody > tr:nth-of-type(odd) > * { background-color: rgba(255,255,255,0.03); color: var(--text-primary); }
    .table-empty-state { color: var(--text-muted); }

    .badge.text-bg-light { background-color: #1E293B !important; color: var(--text-primary) !important; border-color: var(--border-color) !important; }
    .badge.text-bg-secondary { background-color: #334155 !important; color: #F1F5F9 !important; }

    .sidebar-section-label { color: var(--text-sidebar-muted); border-color: #334155; }
    .sidebar-nav-item { color: var(--text-sidebar); }
    .sidebar-nav-item:hover { background-color: var(--bg-sidebar-hover); color: #F1F5F9; }

    .app-topbar { background-color: var(--bg-topbar); border-color: var(--border-color); }
    .topbar-brand { color: var(--brand-text); }
    .topbar-divider { background-color: var(--border-color); }

    .modal-content { background-color: var(--bg-card); border-color: var(--border-color); }
    .modal-header, .modal-footer { border-color: var(--border-color); color: var(--text-primary); }
    .modal-title { color: var(--text-primary); }
    .modal-body  { color: var(--text-primary); }

    .dropdown-menu { background-color: var(--bg-card); border-color: var(--border-color); }
    .dropdown-item { color: var(--text-primary); }
    .dropdown-item:hover, .dropdown-item:focus { background-color: #334155; color: var(--text-primary); }
    .dropdown-divider { border-color: var(--border-color); }

    .alert-info    { background-color: #1E3A4A; border-color: #2563EB; color: #93C5FD; }
    .alert-success { background-color: #14291A; border-color: #15803D; color: #86EFAC; }
    .alert-warning { background-color: #2D1F00; border-color: #D97706; color: #FCD34D; }
    .alert-danger  { background-color: #2D0E0E; border-color: #DC2626; color: #FCA5A5; }

    .page-heading { color: var(--text-primary); }
    .breadcrumb { background: transparent; }
    .breadcrumb-item, .breadcrumb-item a { color: var(--text-muted); }
    .breadcrumb-item.active { color: var(--text-primary); }
    .breadcrumb-item + .breadcrumb-item::before { color: var(--text-muted); }

    .list-group-item { background-color: var(--bg-card); border-color: var(--border-color); color: var(--text-primary); }
    .progress { background-color: #334155; }

    .nav-tabs { border-color: var(--border-color); }
    .nav-tabs .nav-link { color: var(--text-muted); }
    .nav-tabs .nav-link:hover { color: var(--text-primary); border-color: var(--border-color); }
    .nav-tabs .nav-link.active { background-color: var(--bg-card); border-color: var(--border-color) var(--border-color) var(--bg-card); color: var(--text-primary); }

    #studentDropdown { background-color: var(--bg-card) !important; border-color: var(--border-color) !important; color: var(--text-primary); }
    .student-option { color: var(--text-primary) !important; }
    .student-option:hover { background: #334155 !important; }

    .app-footer { border-color: var(--border-color); color: var(--text-muted); }

    .page-link { background-color: var(--bg-card); border-color: var(--border-color); color: var(--text-primary); }
    .page-link:hover { background-color: #334155; color: var(--text-primary); }
    .page-item.active .page-link { background-color: var(--color-primary); border-color: var(--color-primary); }
    .page-item.disabled .page-link { background-color: var(--bg-card); color: var(--text-muted); }

    .card-header .form-control,
    .card-header .form-select { background-color: #0F172A; border-color: var(--border-color); color: var(--text-primary); }

    hr, .dropdown-divider { border-color: var(--border-color); opacity: 1; }
    .small, small { color: inherit; }
    dl dt { color: var(--text-muted); }
    dl dd { color: var(--text-primary); }

    .toast { background-color: var(--bg-card); border-color: var(--border-color); color: var(--text-primary); }

    .stat-card[style*="linear-gradient"] .stat-label,
    .stat-card[style*="linear-gradient"] .stat-value,
    .stat-card[style*="linear-gradient"] .small { color: rgba(255,255,255,0.9) !important; }
}