/* ==============================================
   module.css  —  place in:  public/css/module.css
   Load AFTER students.css — inherits all its CSS variables.
   Used by: highlights.html, submissions.html, marks.html
   ============================================== */

/* ── Page header ──────────────────────────────────────────────── */
.mod-page-header { margin-bottom: 2.2rem; }
.mod-page-header h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.2rem; font-weight: 800;
    display: flex; align-items: center; gap: .8rem;
    background: var(--grad-main);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.mod-page-header h1 .page-icon { -webkit-text-fill-color: initial; font-size: 1.9rem; }
.mod-page-header p { color: var(--text-secondary); margin-top: .4rem; font-size: .98rem; }

/* ── Stats row ────────────────────────────────────────────────── */
.mod-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: .9rem; margin-bottom: 2rem;
}
.mod-stat {
    background: rgba(22,33,62,.7); border: 1px solid rgba(42,250,223,.1);
    border-radius: var(--r-md); padding: 1rem .9rem;
    text-align: center; backdrop-filter: blur(10px); transition: var(--ease);
}
.mod-stat:hover { transform: translateY(-3px); border-color: rgba(42,250,223,.3); }
.mod-stat.s-gold   { border-color: rgba(255,215,0,.18); }
.mod-stat.s-gold:hover   { border-color: rgba(255,215,0,.5);  box-shadow: 0 0 20px rgba(255,215,0,.18); }
.mod-stat.s-red    { border-color: rgba(255,68,68,.18);  }
.mod-stat.s-red:hover    { border-color: rgba(255,68,68,.5);   box-shadow: 0 0 20px rgba(255,68,68,.18); }
.mod-stat.s-purple { border-color: rgba(138,43,226,.18); }
.mod-stat.s-purple:hover { border-color: rgba(138,43,226,.5); box-shadow: 0 0 20px rgba(138,43,226,.18); }
.mod-stat.s-blue   { border-color: rgba(79,195,247,.18); }
.mod-stat.s-blue:hover   { border-color: rgba(79,195,247,.5);  box-shadow: 0 0 20px rgba(79,195,247,.18); }
.mod-stat.s-amber  { border-color: rgba(255,154,60,.18); }
.mod-stat.s-amber:hover  { border-color: rgba(255,154,60,.5);  box-shadow: 0 0 20px rgba(255,154,60,.18); }
.mod-stat.s-pink   { border-color: rgba(255,46,99,.18);  }
.mod-stat.s-pink:hover   { border-color: rgba(255,46,99,.5);   box-shadow: 0 0 20px rgba(255,46,99,.18); }

.mod-stat-num  { font-family: 'Poppins', sans-serif; font-size: 2rem; font-weight: 800; color: var(--accent-teal); display: block; }
.mod-stat-num.c-gold   { color: var(--accent-gold);  }
.mod-stat-num.c-red    { color: var(--accent-red);   }
.mod-stat-num.c-purple { color: #b06aff;             }
.mod-stat-num.c-blue   { color: var(--accent-blue);  }
.mod-stat-num.c-amber  { color: var(--accent-amber); }
.mod-stat-num.c-pink   { color: var(--accent-pink);  }
.mod-stat-lbl  { font-size: .68rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-top: .3rem; display: block; }

/* ── Stats bar (ms- prefix used in marks/submissions) ─────────── */
.mod-stats-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: .8rem;
    margin-bottom: 2rem;
}
.ms-card {
    background: rgba(22,33,62,.7);
    border: 1px solid rgba(42,250,223,.1);
    border-radius: 12px;
    padding: 1rem .8rem;
    text-align: center;
    transition: var(--ease);
}
.ms-card:hover { transform: translateY(-3px); border-color: rgba(42,250,223,.3); }
.ms-card.teal   { border-color: rgba(42,250,223,.2); }
.ms-card.purple { border-color: rgba(138,43,226,.2); }
.ms-card.blue   { border-color: rgba(79,195,247,.2); }
.ms-card.amber  { border-color: rgba(255,154,60,.2); }
.ms-card.pink   { border-color: rgba(255,46,99,.2); }
.ms-card.gold   { border-color: rgba(255,215,0,.2); }
.ms-card.red    { border-color: rgba(255,68,68,.2); }
.ms-num {
    font-family: 'Poppins', sans-serif;
    font-size: 1.8rem; font-weight: 800;
    color: var(--accent-teal); display: block;
}
.ms-card.teal   .ms-num { color: var(--accent-teal); }
.ms-card.purple .ms-num { color: #b06aff; }
.ms-card.blue   .ms-num { color: var(--accent-blue); }
.ms-card.amber  .ms-num { color: var(--accent-amber); }
.ms-card.pink   .ms-num { color: var(--accent-pink); }
.ms-card.gold   .ms-num { color: var(--accent-gold); }
.ms-card.red    .ms-num { color: var(--accent-red); }
.ms-lbl {
    font-size: .68rem; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: 1px;
    margin-top: .3rem; display: block;
}

/* ── Search / filter bar ──────────────────────────────────────── */
.mod-controls { display: flex; gap: 1rem; margin-bottom: 1.4rem; flex-wrap: wrap; align-items: center; }
.search-wrap  { position: relative; flex: 1; min-width: 200px; }
.search-wrap i { position: absolute; left: .9rem; top: 50%; transform: translateY(-50%); color: var(--text-muted); pointer-events: none; }
.mod-search {
    width: 100%; padding: .75rem 1rem .75rem 2.7rem;
    background: rgba(22,33,62,.85); border: 1px solid rgba(42,250,223,.15);
    border-radius: var(--r-md); color: var(--text-primary);
    font-size: .95rem; font-family: 'Inter', sans-serif; outline: none; transition: var(--ease);
}
.mod-search:focus { border-color: var(--accent-teal); box-shadow: 0 0 0 3px rgba(42,250,223,.08); }
.mod-search::placeholder { color: var(--text-muted); }

/* ── Filter buttons (mf- prefix) ─────────────────────────────── */
.mod-filter-btns { display: flex; gap: .5rem; flex-wrap: wrap; }
.mf-btn {
    padding: .5rem 1rem; border-radius: 20px;
    border: 1px solid rgba(42,250,223,.2);
    background: rgba(42,250,223,.06); color: var(--text-muted);
    font-family: 'Inter', sans-serif; font-size: .82rem; font-weight: 600;
    cursor: pointer; transition: var(--ease);
}
.mf-btn:hover  { color: var(--text-primary); border-color: rgba(42,250,223,.4); }
.mf-btn.active { background: linear-gradient(135deg, #8a2be2, #2afadf); color: #fff; border-color: transparent; }

.filter-btn {
    display: inline-flex; align-items: center; gap: 7px;
    padding: .6rem 1.1rem; border-radius: var(--r-md);
    border: 1px solid rgba(42,250,223,.2);
    background: rgba(42,250,223,.07); color: var(--text-secondary);
    font-family: 'Inter', sans-serif; font-size: .84rem; font-weight: 600;
    cursor: pointer; transition: var(--ease); white-space: nowrap;
}
.filter-btn:hover   { color: var(--text-primary); border-color: rgba(42,250,223,.4); }
.filter-btn.active  { background: var(--grad-main); color: #fff; border-color: transparent; }

/* ── Shared list container ────────────────────────────────────── */
.mod-list { display: flex; flex-direction: column; gap: .65rem; }

/* ── Shared empty state ───────────────────────────────────────── */
.mod-empty { text-align: center; padding: 4rem 2rem; }
.mod-empty i   { font-size: 3rem; color: rgba(42,250,223,.15); display: block; margin-bottom: 1rem; }
.mod-empty h3  { font-family: 'Poppins', sans-serif; font-size: 1.2rem; color: var(--text-secondary); margin-bottom: .5rem; }
.mod-empty p   { color: var(--text-muted); font-size: .9rem; }
.mod-empty a   { color: var(--accent-teal); text-decoration: none; }

/* ── Shared avatar helpers ────────────────────────────────────── */
.mod-avatar {
    width: 44px; height: 44px; border-radius: 50%;
    object-fit: cover; border: 2px solid rgba(42,250,223,.25); flex-shrink: 0;
}
.mod-avatar-ph {
    width: 44px; height: 44px; border-radius: 50%;
    background: var(--grad-main);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.05rem; font-weight: 700; color: #fff; flex-shrink: 0;
}
.mod-name { font-weight: 600; font-size: .93rem; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.mod-roll { font-size: .76rem; color: var(--accent-teal); margin-top: 2px; }

/* ══════════════════════════════════════════════════════════════
   HIGHLIGHTS & WARNINGS PAGE
   ══════════════════════════════════════════════════════════════ */
.hl-row {
    display: flex; align-items: center; gap: 1rem;
    padding: .9rem 1.2rem;
    background: rgba(22,33,62,.65); border: 1px solid rgba(42,250,223,.08);
    border-left: 3px solid rgba(42,250,223,.3);
    border-radius: var(--r-md); transition: var(--ease); position: relative;
}
.hl-row:hover { border-color: rgba(42,250,223,.22); background: rgba(22,33,62,.9); }
.hl-row.is-highlighted {
    background: rgba(36,30,5,.8); border-color: rgba(255,215,0,.3);
    border-left-color: var(--accent-gold); box-shadow: 0 0 20px rgba(255,215,0,.07);
}
.hl-row.is-warned { background: rgba(30,5,5,.8); border-color: rgba(255,68,68,.3); border-left-color: var(--accent-red); }
.hl-row.is-highlighted.is-warned { border-left-color: var(--accent-red); }
.hl-student { flex: 1; min-width: 0; display: flex; align-items: center; gap: .9rem; }
.hl-student-text { min-width: 0; }
.hl-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: .38rem .9rem; border-radius: 20px;
    border: 1px solid rgba(255,215,0,.2); background: rgba(255,215,0,.06);
    color: rgba(255,215,0,.5); font-size: .78rem; font-weight: 700;
    font-family: 'Inter', sans-serif; cursor: pointer; transition: var(--ease); white-space: nowrap;
}
.hl-btn:hover { background: rgba(255,215,0,.14); color: var(--accent-gold); border-color: rgba(255,215,0,.5); }
.hl-btn.active { background: rgba(255,215,0,.18); color: var(--accent-gold); border-color: var(--accent-gold); box-shadow: 0 0 14px rgba(255,215,0,.2); }
.warn-area { display: flex; align-items: center; gap: .6rem; flex-shrink: 0; flex-wrap: wrap; }
.warn-label { font-size: .76rem; color: var(--text-muted); font-weight: 500; white-space: nowrap; }
.warn-dots  { display: flex; gap: 5px; }
.w-dot {
    width: 22px; height: 22px; border-radius: 50%;
    border: 2px solid rgba(255,68,68,.25); background: rgba(255,68,68,.04);
    cursor: pointer; transition: var(--ease);
}
.w-dot:hover  { border-color: rgba(255,68,68,.6); background: rgba(255,68,68,.12); transform: scale(1.1); }
.w-dot.filled { background: rgba(255,68,68,.82); border-color: var(--accent-red); box-shadow: 0 0 8px rgba(255,68,68,.4); }
.w-dot.filled:hover { transform: scale(1.2); }
.warn-badge { font-size: .68rem; font-weight: 700; padding: 2px 7px; border-radius: 20px; background: rgba(255,68,68,.14); color: #ff7070; border: 1px solid rgba(255,68,68,.3); }
.warn-badge.max { background: rgba(255,68,68,.32); color: #fff; box-shadow: 0 0 10px rgba(255,68,68,.3); animation: warnPulse 1.4s infinite; }
@keyframes warnPulse { 0%,100%{ opacity:1 } 50%{ opacity:.55 } }

/* ══════════════════════════════════════════════════════════════
   SUBMISSIONS PAGE
   ══════════════════════════════════════════════════════════════ */
.sub-col-header {
    display: grid;
    grid-template-columns: 220px repeat(5, 1fr);
    gap: .5rem; padding: .4rem 1.2rem; margin-bottom: .3rem;
}
.sub-col-header span {
    font-size: .66rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 1px; color: var(--text-muted);
    display: flex; align-items: center; justify-content: center; gap: .3rem;
}
.sub-col-header span:first-child { justify-content: flex-start; }
.sub-row {
    display: grid;
    grid-template-columns: 220px repeat(5, 1fr);
    gap: .5rem; align-items: center;
    padding: .75rem 1.2rem;
    background: rgba(22,33,62,.65); border: 1px solid rgba(42,250,223,.08);
    border-left: 3px solid rgba(42,250,223,.25);
    border-radius: var(--r-md); transition: var(--ease); position: relative;
}
.sub-row:hover { background: rgba(22,33,62,.9); border-color: rgba(42,250,223,.2); }
.sub-row.all-done { border-left-color: var(--accent-gold); border-color: rgba(255,215,0,.2); background: rgba(36,30,5,.6); }
.sub-student-cell { display: flex; align-items: center; gap: .8rem; min-width: 0; }
.sub-cell { display: flex; flex-direction: column; align-items: center; gap: .3rem; }
.ts-purple input:checked + .toggle-slider { background: rgba(138,43,226,.22); border-color: #b06aff; }
.ts-purple input:checked + .toggle-slider::before { background: #b06aff; }
.ts-blue   input:checked + .toggle-slider { background: rgba(79,195,247,.22); border-color: var(--accent-blue); }
.ts-blue   input:checked + .toggle-slider::before { background: var(--accent-blue); }
.ts-amber  input:checked + .toggle-slider { background: rgba(255,154,60,.22); border-color: var(--accent-amber); }
.ts-amber  input:checked + .toggle-slider::before { background: var(--accent-amber); }
.ts-pink   input:checked + .toggle-slider { background: rgba(255,46,99,.22); border-color: var(--accent-pink); }
.ts-pink   input:checked + .toggle-slider::before { background: var(--accent-pink); }
.sub-mini-label { font-size: .62rem; font-weight: 700; padding: 1px 6px; border-radius: 20px; white-space: nowrap; transition: var(--ease); }
.sub-mini-label.pending   { background: rgba(255,154,60,.08); color: rgba(255,154,60,.6);  border: 1px solid rgba(255,154,60,.18); }
.sub-mini-label.done-teal { background: rgba(42,250,223,.1);  color: var(--accent-teal);   border: 1px solid rgba(42,250,223,.28); }
.sub-mini-label.done-purple { background: rgba(138,43,226,.1); color: #b06aff;             border: 1px solid rgba(138,43,226,.3); }
.sub-mini-label.done-blue   { background: rgba(79,195,247,.1); color: var(--accent-blue);  border: 1px solid rgba(79,195,247,.3); }
.sub-mini-label.done-amber  { background: rgba(255,154,60,.1); color: var(--accent-amber); border: 1px solid rgba(255,154,60,.3); }
.sub-mini-label.done-pink   { background: rgba(255,46,99,.1);  color: var(--accent-pink);  border: 1px solid rgba(255,46,99,.3); }

/* ══════════════════════════════════════════════════════════════
   MARKS PAGE  — wider student column, overflow protected
   ══════════════════════════════════════════════════════════════ */

/* Column header */
.marks-col-header {
    display: grid;
    grid-template-columns: minmax(180px, 240px) repeat(4, minmax(70px, 1fr)) 90px 80px;
    gap: .5rem; padding: .4rem 1.2rem; margin-bottom: .3rem;
    overflow: hidden;
}
.marks-col-header span {
    font-size: .66rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 1px; color: var(--text-muted);
    display: flex; align-items: center; justify-content: center; gap: .3rem;
}
.marks-col-header span:first-child { justify-content: flex-start; }

/* Marks row */
.marks-row {
    display: grid;
    grid-template-columns: minmax(180px, 240px) repeat(4, minmax(70px, 1fr)) 90px 80px;
    gap: .5rem; align-items: center;
    padding: .75rem 1.2rem;
    background: rgba(22,33,62,.65); border: 1px solid rgba(42,250,223,.08);
    border-left: 3px solid rgba(79,195,247,.25);
    border-radius: var(--r-md); transition: var(--ease);
    overflow: hidden;
}
.marks-row:hover  { background: rgba(22,33,62,.9); border-color: rgba(79,195,247,.22); }
.marks-row.has-marks { border-left-color: var(--accent-teal); border-color: rgba(42,250,223,.15); }

/* Student cell — clamps width so it doesn't push mark inputs off screen */
.marks-student-cell {
    display: flex; align-items: center; gap: .7rem;
    min-width: 0; overflow: hidden;
}
.marks-student-cell .mod-avatar,
.marks-student-cell .mod-avatar-ph { flex-shrink: 0; }
.marks-student-cell > div { min-width: 0; overflow: hidden; }

/* Mark input cell */
.mark-cell { display: flex; flex-direction: column; gap: .25rem; }
.mark-cell-label {
    font-size: .6rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: 1px; color: var(--text-muted); text-align: center;
}
.mark-inp {
    width: 100%; padding: .5rem .3rem;
    background: rgba(10,25,47,.75); border: 1px solid rgba(42,250,223,.14);
    border-radius: var(--r-md); color: var(--text-primary);
    font-size: .88rem; font-family: 'Inter', sans-serif;
    text-align: center; outline: none; transition: var(--ease);
   
}
.mark-inp::-webkit-outer-spin-button,
.mark-inp::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.mark-inp:focus { border-color: var(--accent-teal); box-shadow: 0 0 0 3px rgba(42,250,223,.08); }
.mark-inp::placeholder { color: rgba(136,146,176,.4); font-size: .75rem; }
.mark-inp.filled { border-color: rgba(79,195,247,.3); color: var(--accent-blue); font-weight: 700; }

/* Total cell */
.marks-total-cell {
    display: flex; flex-direction: column; align-items: center;
    background: rgba(79,195,247,.07); border: 1px solid rgba(79,195,247,.18);
    border-radius: var(--r-md); padding: .5rem .4rem; gap: .1rem;
}
.marks-total-val   { font-family: 'Poppins', sans-serif; font-size: 1.2rem; font-weight: 800; color: var(--accent-blue); line-height: 1.1; }
.marks-total-max   { font-size: .55rem; color: var(--text-muted); }
.marks-total-label { font-size: .58rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); font-weight: 600; }

/* Save button cell */
.marks-save-cell { display: flex; justify-content: center; }
.btn-save-row {
    display: inline-flex; align-items: center; gap: 5px;
    padding: .42rem .7rem; border-radius: 20px;
    background: rgba(42,250,223,.09); border: 1px solid rgba(42,250,223,.22);
    color: var(--accent-teal); font-size: .74rem; font-weight: 700;
    font-family: 'Inter', sans-serif; cursor: pointer; transition: var(--ease); white-space: nowrap;
}
.btn-save-row:hover    { background: rgba(42,250,223,.2); box-shadow: 0 0 12px rgba(42,250,223,.15); }
.btn-save-row:disabled { opacity: .45; cursor: not-allowed; }
.btn-save-row.saved    { background: rgba(42,250,223,.18); border-color: var(--accent-teal); }

/* Class average bar */
.marks-avg-bar {
    display: flex; align-items: center; justify-content: space-between;
    gap: 1rem; flex-wrap: wrap;
    background: rgba(22,33,62,.7); border: 1px solid rgba(79,195,247,.18);
    border-radius: var(--r-md); padding: 1rem 1.4rem; margin-bottom: 1.4rem;
}
.avg-item { text-align: center; }
.avg-val  { font-family: 'Poppins', sans-serif; font-size: 1.5rem; font-weight: 800; color: var(--accent-blue); display: block; }
.avg-lbl  { font-size: .68rem; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); display: block; }
.avg-divider { width: 1px; height: 36px; background: rgba(79,195,247,.15); }

/* ── Tab bar (att-tab-bar used in attendance HTML via classes.css additions) ── */
.att-tab-bar {
    display: flex; gap: .6rem; margin-bottom: 2rem;
    background: rgba(10,25,47,.5); border-radius: 20px; padding: 6px; width: fit-content;
}
.att-tab {
    display: flex; align-items: center; gap: 8px; padding: .7rem 1.5rem;
    border: none; border-radius: 12px; background: none; color: var(--text-muted);
    font-family: 'Inter', sans-serif; font-size: .95rem; font-weight: 600;
    cursor: pointer; transition: var(--ease);
}
.att-tab:hover  { color: var(--text-primary); background: rgba(42,250,223,.08); }
.att-tab.active { background: linear-gradient(135deg, #8a2be2, #2afadf); color: #fff; }

/* ══ Responsive ═══════════════════════════════════════════════ */
@media(max-width:1100px) {
    .marks-col-header,
    .marks-row { grid-template-columns: minmax(160px,200px) repeat(4,minmax(60px,1fr)) 80px 70px; }
    .sub-col-header,
    .sub-row { grid-template-columns: 180px repeat(5, 1fr); }
}
@media(max-width:820px) {
    /* Submissions — collapse to 2-row */
    .sub-col-header { display: none; }
    .sub-row { grid-template-columns: 1fr 1fr 1fr; grid-template-rows: auto auto; }
    .sub-student-cell { grid-column: 1 / -1; }

    /* Marks — collapse to 2-col card layout */
    .marks-col-header { display: none; }
    .marks-row {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto auto auto;
        row-gap: .8rem;
    }
    .marks-student-cell { grid-column: 1 / -1; }
    .marks-total-cell   { grid-column: 1; }
    .marks-save-cell    { grid-column: 2; justify-content: flex-start; align-items: center; }
    .mark-cell-label    { display: block; }
}
@media(max-width:560px) {
    .sub-row { grid-template-columns: 1fr 1fr 1fr; }
    .marks-row { grid-template-columns: 1fr 1fr; }
    .mod-stats { grid-template-columns: repeat(2,1fr); }
    .mod-stats-bar { grid-template-columns: repeat(2,1fr); }
    .marks-avg-bar { gap: .6rem; }
}

/* ══ Highlights — mobile fix ══════════════════════════════════ */
@media (max-width: 640px) {
    .hl-row {
        display: grid !important;
        grid-template-columns: 1fr auto;
        grid-template-rows: auto auto;
        gap: .65rem; align-items: start; padding: .85rem 1rem;
    }
    .hl-student { grid-column: 1 / -1; grid-row: 1; min-width: 0; overflow: hidden; }
    .hl-student-text { min-width: 0; flex: 1 1 0; overflow: hidden; }
    .mod-name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 100%; display: block; }
    .hl-btn { grid-column: 1; grid-row: 2; justify-self: start; width: auto; }
    .warn-area { grid-column: 2; grid-row: 2; justify-self: end; align-items: center; flex-wrap: nowrap; gap: .35rem; }
    .warn-dots { gap: 4px; }
    .w-dot     { width: 20px; height: 20px; }
    .warn-label { display: none; }
}