/* ═══════════════════════════════════════════════════════════════
   Qubitron Labs — Dashboard Design System
   Industrial-editorial aesthetic with warm copper accents
   ═══════════════════════════════════════════════════════════════ */

/* ── Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300..700;1,9..40,300..700&family=Instrument+Serif:ital@0;1&display=swap');

:root {
    /* Palette */
    --bg:           #0E0F11;
    --bg-card:      #16171B;
    --bg-card-alt:  #1C1D22;
    --bg-surface:   #222329;
    --border:       #2A2B32;
    --border-light: #35363F;

    --text:         #E8E6E1;
    --text-dim:     #9B9A97;
    --text-muted:   #6B6A68;

    --copper:       #C47A4A;
    --copper-light: #E09A6A;
    --copper-glow:  rgba(196, 122, 74, 0.15);
    --copper-glow2: rgba(196, 122, 74, 0.08);

    --green:        #4ADE80;
    --green-bg:     rgba(74, 222, 128, 0.1);
    --red:          #F87171;
    --red-bg:       rgba(248, 113, 113, 0.1);
    --amber:        #FBBF24;
    --amber-bg:     rgba(251, 191, 36, 0.1);
    --blue:         #60A5FA;
    --blue-bg:      rgba(96, 165, 250, 0.1);
    --purple:       #A78BFA;

    /* Typography */
    --font-display: 'Instrument Serif', Georgia, serif;
    --font-body:    'DM Sans', system-ui, -apple-system, sans-serif;

    /* Spacing */
    --gap: 1.5rem;
    --radius: 10px;
    --radius-sm: 6px;
    --sidebar-w: 260px;

    /* Transitions */
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

a { color: var(--copper-light); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--copper); }

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

/* ── Sidebar ── */
.sidebar {
    width: var(--sidebar-w);
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    overflow-y: auto;
}

.sidebar-brand {
    padding: 1.8rem 1.5rem 1.4rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 0.8rem;
}
.sidebar-brand img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    object-fit: contain;
}
.sidebar-brand h1 {
    font-family: var(--font-display);
    font-size: 1.35rem;
    font-weight: 400;
    color: var(--text);
    letter-spacing: -0.02em;
}
.sidebar-brand small {
    display: block;
    font-family: var(--font-body);
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-top: 2px;
}

.sidebar-nav {
    padding: 1rem 0;
    flex: 1;
}
.nav-section {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--text-muted);
    padding: 0.8rem 1.5rem 0.5rem;
    font-weight: 500;
}
.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem 1.5rem;
    color: var(--text-dim);
    font-size: 0.88rem;
    font-weight: 400;
    transition: all .2s var(--ease);
    border-left: 3px solid transparent;
}
.nav-link:hover {
    color: var(--text);
    background: var(--copper-glow2);
}
.nav-link.active {
    color: var(--copper-light);
    background: var(--copper-glow);
    border-left-color: var(--copper);
    font-weight: 500;
}
.nav-link svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    opacity: 0.7;
}
.nav-link.active svg { opacity: 1; }

.sidebar-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    font-size: 0.72rem;
    color: var(--text-muted);
}

/* ── Main ── */
.main {
    flex: 1;
    margin-left: var(--sidebar-w);
    min-height: 100vh;
}

.topbar {
    padding: 1.2rem 2rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(12px);
}
.topbar-title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 400;
    letter-spacing: -0.02em;
}
.topbar-title span { color: var(--copper); }
.topbar-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.82rem;
    color: var(--text-dim);
}

.content {
    padding: 2rem;
}

/* ── Cards ── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}
.card-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.card-header h2, .card-header h3 {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.1rem;
}
.card-body {
    padding: 1.25rem;
}

/* ── Stat Cards ── */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--gap);
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.3rem 1.4rem;
    position: relative;
    overflow: hidden;
    transition: border-color .3s var(--ease), transform .3s var(--ease);
}
.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--copper), var(--copper-light));
    opacity: 0;
    transition: opacity .3s var(--ease);
}
.stat-card:hover {
    border-color: var(--border-light);
    transform: translateY(-2px);
}
.stat-card:hover::before { opacity: 1; }

.stat-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    margin-bottom: 0.6rem;
}
.stat-value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 400;
    letter-spacing: -0.03em;
    line-height: 1.1;
}
.stat-value.text-copper { color: var(--copper-light); }
.stat-sub {
    font-size: 0.78rem;
    color: var(--text-dim);
    margin-top: 0.3rem;
}
.stat-icon {
    position: absolute;
    top: 1.2rem;
    right: 1.2rem;
    width: 38px;
    height: 38px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.stat-icon svg { width: 20px; height: 20px; }
.stat-icon.copper { background: var(--copper-glow); color: var(--copper-light); }
.stat-icon.green  { background: var(--green-bg);  color: var(--green); }
.stat-icon.red    { background: var(--red-bg);    color: var(--red); }
.stat-icon.blue   { background: var(--blue-bg);   color: var(--blue); }
.stat-icon.amber  { background: var(--amber-bg);  color: var(--amber); }

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

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}
table thead {
    position: sticky;
    top: 0;
    z-index: 5;
}
table th {
    padding: 0.7rem 1rem;
    text-align: left;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    background: var(--bg-card-alt);
    border-bottom: 1px solid var(--border);
    font-weight: 500;
    white-space: nowrap;
}
table td {
    padding: 0.65rem 1rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-dim);
    white-space: nowrap;
}
table tbody tr {
    transition: background .15s var(--ease);
}
table tbody tr:hover {
    background: var(--copper-glow2);
}
table tbody tr:hover td {
    color: var(--text);
}

/* ── Badges ── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 0.2rem 0.6rem;
    border-radius: 100px;
    font-size: 0.7rem;
    font-weight: 500;
    line-height: 1.4;
    letter-spacing: 0.02em;
}
.badge-green  { background: var(--green-bg);  color: var(--green); }
.badge-red    { background: var(--red-bg);    color: var(--red); }
.badge-amber  { background: var(--amber-bg);  color: var(--amber); }
.badge-blue   { background: var(--blue-bg);   color: var(--blue); }
.badge-copper { background: var(--copper-glow); color: var(--copper-light); }
.badge-muted  { background: var(--bg-surface); color: var(--text-muted); }

/* ── Attendance marks ── */
.mark { display: inline-flex; align-items: center; justify-content: center;
    width: 28px; height: 28px; border-radius: 6px; font-size: 0.72rem;
    font-weight: 600; transition: transform .15s var(--ease); }
.mark:hover { transform: scale(1.15); }
.mark-P { background: var(--green-bg); color: var(--green); }
.mark-A { background: var(--red-bg); color: var(--red); }
.mark-H { background: var(--amber-bg); color: var(--amber); }
.mark-W { background: var(--bg-surface); color: var(--text-muted); }
.mark-empty { background: transparent; color: var(--text-muted); opacity: 0.3; }

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1.2rem;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    font-weight: 500;
    font-family: var(--font-body);
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-dim);
    cursor: pointer;
    transition: all .2s var(--ease);
}
.btn:hover { color: var(--text); border-color: var(--border-light); background: var(--bg-card-alt); }
.btn svg { width: 16px; height: 16px; }
.btn-copper {
    background: linear-gradient(135deg, var(--copper), #B06A3A);
    border-color: var(--copper);
    color: #fff;
}
.btn-copper:hover { background: linear-gradient(135deg, var(--copper-light), var(--copper)); color: #fff; }

/* ── Forms ── */
select, input[type="text"], input[type="number"], input[type="date"] {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.55rem 0.9rem;
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.82rem;
    outline: none;
    transition: border-color .2s var(--ease);
}
select:focus, input:focus { border-color: var(--copper); }
select { cursor: pointer; }

/* ── Filters bar ── */
.filters {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
}

/* ── Flash messages ── */
.flash {
    padding: 0.8rem 1.2rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    animation: flashIn .4s var(--ease);
}
.flash-success { background: var(--green-bg); color: var(--green); border: 1px solid rgba(74,222,128,.2); }
.flash-error   { background: var(--red-bg);   color: var(--red);   border: 1px solid rgba(248,113,113,.2); }

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

/* ── Grid helpers ── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--gap); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }

/* ── Month grid ── */
.month-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
}
.month-grid .day-header {
    text-align: center;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    padding: 0.4rem 0;
}

/* ── Empty state ── */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}
.empty-state svg { width: 48px; height: 48px; margin-bottom: 1rem; opacity: 0.4; }
.empty-state h3 { font-family: var(--font-display); font-size: 1.2rem; color: var(--text-dim); margin-bottom: 0.3rem; }
.empty-state p { font-size: 0.85rem; }

/* ── Chart placeholder ── */
.chart-bar {
    display: flex;
    align-items: flex-end;
    gap: 6px;
    height: 160px;
    padding-top: 1rem;
}
.chart-bar .bar {
    flex: 1;
    border-radius: 4px 4px 0 0;
    background: linear-gradient(to top, var(--copper), var(--copper-light));
    min-height: 4px;
    position: relative;
    transition: height .5s var(--ease);
}
.chart-bar .bar:hover { opacity: 0.85; }
.chart-bar .bar-label {
    position: absolute;
    bottom: -22px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.6rem;
    color: var(--text-muted);
    white-space: nowrap;
}
.chart-bar .bar-value {
    position: absolute;
    top: -18px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.65rem;
    color: var(--text-dim);
    white-space: nowrap;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-light); }

/* ── Responsive ── */
@media (max-width: 1024px) {
    :root { --sidebar-w: 0px; }
    .sidebar { transform: translateX(-100%); }
    .content { padding: 1.2rem; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* ── Animations ── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(12px); }
    to   { opacity: 1; transform: translateY(0); }
}
.fade-up {
    animation: fadeUp .5s var(--ease) both;
}
.fade-up:nth-child(2) { animation-delay: .05s; }
.fade-up:nth-child(3) { animation-delay: .1s; }
.fade-up:nth-child(4) { animation-delay: .15s; }
.fade-up:nth-child(5) { animation-delay: .2s; }
.fade-up:nth-child(6) { animation-delay: .25s; }

/* progress ring for attendance */
.ring {
    width: 56px;
    height: 56px;
    position: relative;
}
.ring svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.ring .ring-bg { fill: none; stroke: var(--bg-surface); stroke-width: 4; }
.ring .ring-fill { fill: none; stroke: var(--copper-light); stroke-width: 4;
    stroke-linecap: round; transition: stroke-dashoffset .8s var(--ease); }
.ring .ring-text {
    position: absolute; inset: 0; display: flex; align-items: center;
    justify-content: center; font-size: 0.72rem; font-weight: 600; color: var(--text);
}

/* Employee avatar circle */
.avatar {
    width: 34px; height: 34px; border-radius: 50%;
    background: var(--copper-glow); color: var(--copper-light);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.75rem; font-weight: 600; flex-shrink: 0;
    letter-spacing: 0.03em;
}

/* header with grain texture */
.topbar::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    opacity: 0.5;
}

/* ── Modal System ── */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    animation: modalFadeIn .25s var(--ease);
}
.modal-overlay.active { display: flex; }
.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 90%;
    max-width: 640px;
    max-height: 85vh;
    overflow-y: auto;
    animation: modalSlideUp .3s var(--ease);
}
.modal-lg { max-width: 860px; }
.modal-header {
    padding: 1.2rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.modal-header h3 {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 1.15rem;
}
.modal-close {
    width: 32px; height: 32px;
    border-radius: 6px;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-dim);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all .15s var(--ease);
    font-size: 1.1rem;
}
.modal-close:hover { background: var(--bg-surface); color: var(--text); }
.modal-body { padding: 1.5rem; }
.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.6rem;
}

@keyframes modalFadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes modalSlideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

/* ── Form Groups ── */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}
.form-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}
.form-group { display: flex; flex-direction: column; gap: 0.3rem; }
.form-group.full { grid-column: 1 / -1; }
.form-label {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    font-weight: 500;
}
textarea {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.55rem 0.9rem;
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.82rem;
    outline: none;
    resize: vertical;
    min-height: 60px;
    transition: border-color .2s var(--ease);
}
textarea:focus { border-color: var(--copper); }
input[type="email"] {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.55rem 0.9rem;
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.82rem;
    outline: none;
    transition: border-color .2s var(--ease);
}
input[type="email"]:focus { border-color: var(--copper); }

/* ── Button variants ── */
.btn-sm {
    padding: 0.35rem 0.8rem;
    font-size: 0.75rem;
}
.btn-green {
    background: var(--green-bg);
    border-color: rgba(74,222,128,.3);
    color: var(--green);
}
.btn-green:hover { background: rgba(74,222,128,.2); color: var(--green); }
.btn-red {
    background: var(--red-bg);
    border-color: rgba(248,113,113,.3);
    color: var(--red);
}
.btn-red:hover { background: rgba(248,113,113,.2); color: var(--red); }
.btn-amber {
    background: var(--amber-bg);
    border-color: rgba(251,191,36,.3);
    color: var(--amber);
}
.btn-amber:hover { background: rgba(251,191,36,.2); color: var(--amber); }

/* ── Action cell ── */
.actions { display: flex; gap: 0.4rem; align-items: center; }
.actions .btn { padding: 0.3rem 0.5rem; }
.actions .btn svg { width: 14px; height: 14px; }

/* ── Inline mark selector ── */
.mark-select {
    display: inline-flex;
    gap: 2px;
    align-items: center;
}
.mark-select .mark {
    cursor: pointer;
    opacity: 0.35;
    transition: opacity .15s var(--ease), transform .15s var(--ease);
}
.mark-select .mark:hover { opacity: 0.7; }
.mark-select .mark.selected { opacity: 1; transform: scale(1.15); }

/* ── Tabs ── */
.tab-bar {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.5rem;
}
.tab {
    padding: 0.7rem 1.2rem;
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-dim);
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all .2s var(--ease);
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
    font-family: var(--font-body);
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--copper-light); border-bottom-color: var(--copper); }

/* ── Confirm dialog (inline) ── */
.confirm-bar {
    background: var(--red-bg);
    border: 1px solid rgba(248,113,113,.2);
    border-radius: var(--radius-sm);
    padding: 0.6rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 0.82rem;
    color: var(--red);
    margin-bottom: 1rem;
    animation: flashIn .3s var(--ease);
}

/* ── Toolbar ── */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}
.toolbar-left { display: flex; align-items: center; gap: 0.6rem; flex-wrap: wrap; }
.toolbar-right { display: flex; align-items: center; gap: 0.6rem; }

/* search input */
.search-input {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.55rem 0.9rem 0.55rem 2.2rem;
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.82rem;
    outline: none;
    width: 220px;
    transition: border-color .2s var(--ease), width .3s var(--ease);
    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='%236B6A68' stroke-width='2'%3E%3Ccircle cx='11' cy='11' r='8'/%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: 0.7rem center;
}
.search-input:focus { border-color: var(--copper); width: 280px; }
    opacity: 0.5;
}