:root {
  --ink: #19213b;
  --muted: #667085;
  --line: #e6e9f2;
  --canvas: #f5f7fb;
  --surface: #ffffff;
  --primary: #3855c8;
  --primary-deep: #273c9b;
  --primary-soft: #e9edff;
  --green: #15805f;
  --yellow: #a86400;
  --red: #c14545;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--canvas);
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; background: var(--canvas); color: var(--ink); }
a { color: inherit; text-decoration: none; }
button, select { font: inherit; }
button { cursor: pointer; }

.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid rgba(230,233,242,.9); background: rgba(255,255,255,.94); backdrop-filter: blur(12px); }
.header-inner { width: min(1100px, calc(100% - 32px)); min-height: 70px; margin: auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; letter-spacing: -.02em; }
.brand-mark { width: 36px; height: 36px; display: grid; place-items: center; border-radius: 11px; color: #fff; background: linear-gradient(135deg, #4d68da, #3047ac); box-shadow: 0 5px 12px rgba(56,85,200,.22); }
.brand small { display: block; margin-top: 1px; color: var(--muted); font-size: .72rem; font-weight: 600; letter-spacing: 0; }
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a { padding: 8px 11px; border-radius: 9px; color: var(--muted); font-size: .9rem; font-weight: 700; }
.main-nav a:hover, .main-nav a[aria-current="page"] { color: var(--primary); background: var(--primary-soft); }

.page { width: min(1100px, calc(100% - 32px)); margin: 0 auto; padding: 34px 0 48px; }
.hero { position: relative; overflow: hidden; padding: 34px; border-radius: 24px; color: #fff; background: linear-gradient(120deg, #263d9d, #4c67d9); box-shadow: 0 18px 35px rgba(41,61,155,.18); }
.hero::after { content: ""; position: absolute; right: -70px; bottom: -95px; width: 270px; height: 270px; border: 38px solid rgba(255,255,255,.11); border-radius: 50%; }
.eyebrow { display: inline-block; margin-bottom: 8px; color: inherit; font-size: .72rem; font-weight: 800; letter-spacing: .11em; opacity: .78; }
.hero h1 { position: relative; z-index: 1; max-width: 650px; margin: 0; font-size: clamp(1.7rem, 4vw, 2.45rem); line-height: 1.15; letter-spacing: -.04em; }
.hero p { position: relative; z-index: 1; max-width: 610px; margin: 12px 0 0; color: rgba(255,255,255,.83); line-height: 1.6; }
.hero-actions { position: relative; z-index: 1; display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }

.button { display: inline-flex; align-items: center; justify-content: center; gap: 7px; min-height: 42px; padding: 0 15px; border: 1px solid transparent; border-radius: 10px; font-weight: 800; font-size: .9rem; transition: .18s ease; }
.button-primary { color: #fff; background: var(--primary); }
.button-primary:hover { background: var(--primary-deep); transform: translateY(-1px); }
.hero .button-primary { color: var(--primary-deep); background: #fff; }
.button-secondary { color: var(--primary); border-color: #cdd5f6; background: #fff; }
.button-secondary:hover { border-color: var(--primary); background: var(--primary-soft); }
.button-danger { color: #a23535; border-color: #edc6c6; background: #fff7f7; }
.button-danger:hover { border-color: #c14545; color: #fff; background: var(--red); }

.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin: 22px 0 30px; }
.stat-card, .panel, .task-card, .group-card { border: 1px solid var(--line); border-radius: 17px; background: var(--surface); box-shadow: 0 5px 18px rgba(25,33,59,.035); }
.stat-card { padding: 18px; }
.stat-card span { display: block; color: var(--muted); font-size: .82rem; font-weight: 700; }
.stat-card strong { display: block; margin-top: 6px; color: var(--primary-deep); font-size: 1.65rem; letter-spacing: -.05em; }

.content-grid { display: grid; grid-template-columns: 1.45fr .85fr; gap: 20px; }
.panel { padding: 22px; }
.panel-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; margin-bottom: 16px; }
.panel-heading h2 { margin: 0; font-size: 1.12rem; letter-spacing: -.02em; }
.panel-heading p { margin: 4px 0 0; color: var(--muted); font-size: .88rem; }
.course-list, .deadline-list, .member-list, .checklist { padding: 0; margin: 0; list-style: none; }
.course-list { display: grid; gap: 10px; }
.course-link { display: flex; align-items: center; gap: 12px; padding: 13px; border-radius: 12px; background: #f8f9fe; }
.course-link:hover { background: var(--primary-soft); }
.course-link-icon { display: grid; width: 35px; height: 35px; place-items: center; border-radius: 10px; background: #fff; }
.course-link strong, .deadline-list strong { display: block; font-size: .91rem; }
.course-link small, .deadline-list small { display: block; margin-top: 2px; color: var(--muted); font-size: .78rem; }
.deadline-list { display: grid; gap: 13px; }
.deadline-item { display: flex; gap: 11px; align-items: flex-start; }
.deadline-date { min-width: 48px; padding: 6px; border-radius: 9px; color: var(--primary-deep); background: var(--primary-soft); text-align: center; font-size: .72rem; font-weight: 800; }

.toolbar { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 14px; margin: 22px 0 14px; padding: 17px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
.toolbar-single { grid-template-columns: minmax(0, 1fr); }
.field-label { display: block; margin-bottom: 6px; color: var(--muted); font-size: .76rem; font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
.select-field { width: 100%; min-height: 43px; padding: 0 12px; border: 1px solid #d8deee; border-radius: 10px; color: var(--ink); background: #fff; }
.select-field:disabled { border-color: #e1e5ee; color: #98a2b3; background: #f2f4f7; cursor: not-allowed; }
.text-field { width: 100%; min-height: 43px; padding: 10px 12px; border: 1px solid #d8deee; border-radius: 10px; color: var(--ink); background: #fff; }
.select-field:focus, .text-field:focus, .file-field:focus { outline: 3px solid rgba(56,85,200,.16); border-color: var(--primary); }
.text-area { resize: vertical; line-height: 1.5; }
.file-field { width: 100%; min-height: 43px; padding: 8px; border: 1px dashed #c6cde0; border-radius: 10px; color: var(--muted); background: #f8f9fe; }
.admin-auth-card { width: min(100%, 510px); margin: 22px auto 0; }
.student-auth-card { width: min(100%, 510px); margin: 22px auto 0; }
.student-hero { max-width: 820px; margin: 0 auto; }
.student-summary-panel { max-width: 820px; margin: 22px auto 0; }
.student-course-chips { display: flex; flex-wrap: wrap; gap: 9px; }
.student-course-chips span { padding: 8px 11px; border-radius: 999px; color: var(--primary-deep); background: var(--primary-soft); font-size: .82rem; font-weight: 800; }
.empty-inline { margin: 0; color: var(--muted); font-size: .88rem; }
.password-field { position: relative; display: block; }
.password-field .text-field { padding-right: 46px; }
.password-toggle { position: absolute; top: 50%; right: 5px; display: grid; width: 34px; height: 34px; padding: 0; place-items: center; border: 0; border-radius: 8px; color: #68718a; background: transparent; transform: translateY(-50%); }
.password-toggle:hover, .password-toggle:focus-visible { color: var(--primary); background: var(--primary-soft); outline: none; }
.password-toggle svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.8; }
.admin-panel { margin-top: 22px; }
.admin-form { display: grid; gap: 15px; }
.admin-form label { display: grid; gap: 6px; }
.admin-form-fields { display: grid; gap: 15px; }
.admin-form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.admin-management-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.admin-subpanel { padding: 17px; border: 1px solid var(--line); border-radius: 13px; background: #f8f9fe; }
.admin-subpanel h3 { margin: 0; font-size: 1rem; }
.admin-notice { margin: 18px 0 -4px; }
.admin-task-list { display: grid; gap: 10px; }
.admin-task-filter { display: grid; gap: 6px; margin-bottom: 14px; }
.admin-task-item { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 15px; border: 1px solid var(--line); border-radius: 13px; background: #f8f9fe; }
.admin-task-item h3 { margin: 7px 0 3px; font-size: .98rem; }
.admin-task-item p { margin: 0; color: var(--muted); font-size: .82rem; line-height: 1.45; }
.admin-task-actions { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 10px; }
.task-select-control { display: inline-flex; align-items: center; gap: 7px; color: var(--muted); font-size: .82rem; font-weight: 800; white-space: nowrap; }
.task-select-control input { width: 17px; height: 17px; accent-color: var(--primary); }
.bulk-delete-actions { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin: 0 0 14px; padding: 12px 13px; border: 1px solid #f0d9d9; border-radius: 11px; background: #fffafa; }
.bulk-delete-actions p { margin: 0; color: #734747; font-size: .82rem; font-weight: 700; }
.group-form-note { margin: 0; padding: 12px 14px; border-radius: 11px; color: #44516e; background: #f0f3fb; font-size: .88rem; line-height: 1.5; }
.member-inputs-field { display: grid; gap: 8px; }
.field-help { color: var(--muted); font-size: .78rem; line-height: 1.45; }
.auto-deadline-note { color: var(--primary-deep); font-weight: 700; }
.form-message { min-height: 0; margin: 0; font-size: .88rem; font-weight: 700; }
.form-message-error { padding: 10px 12px; border-radius: 9px; color: #9a3434; background: #fff0f0; }
.form-message-success { padding: 10px 12px; border-radius: 9px; color: #126c52; background: #e6f8f0; }
.meeting-range-field { display: grid; gap: 6px; }
.meeting-range-controls { display: grid; grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr); align-items: center; gap: 8px; }
.meeting-range-controls span { color: var(--muted); font-size: .82rem; font-weight: 700; }
.group-randomizer-inputs label { min-width: 0; }
.randomizer-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.random-group-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 13px; }
.random-group-card { padding: 16px; border: 1px solid #dce3f7; border-radius: 13px; background: linear-gradient(145deg, #f8f9fe, #fff); }
.random-group-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 10px; }
.random-group-heading h3 { margin: 0; font-size: 1rem; }
.random-group-heading span { padding: 5px 7px; border-radius: 7px; color: var(--primary-deep); background: var(--primary-soft); font-size: .72rem; font-weight: 800; white-space: nowrap; }
.random-group-card p { margin: 12px 0 8px; color: #47516a; font-size: .88rem; line-height: 1.55; }
.random-group-card small { color: var(--muted); font-size: .76rem; font-weight: 700; }
.button:disabled { opacity: .56; cursor: not-allowed; transform: none; }
.attachment-link { display: inline-flex; align-items: center; min-height: 37px; padding: 0 11px; border: 1px solid #cdd5f6; border-radius: 9px; color: var(--primary); background: #fff; font-size: .82rem; font-weight: 800; }
.attachment-link:hover { border-color: var(--primary); background: var(--primary-soft); }
.course-summary { display: flex; align-items: center; justify-content: space-between; gap: 18px; margin: 18px 0; padding: 17px; border: 1px solid #dce3ff; border-radius: 15px; background: linear-gradient(120deg, #f3f5ff, #fbfcff); }
.course-summary h2 { margin: 0; font-size: 1.1rem; }
.course-summary p { margin: 4px 0 0; color: var(--muted); font-size: .86rem; }
.schedule-panel { margin-top: 22px; }
.schedule-table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 13px; }
.schedule-table { width: 100%; min-width: 670px; border-collapse: collapse; font-size: .86rem; }
.schedule-table th { padding: 12px 14px; color: #fff; background: #2c4778; font-size: .75rem; letter-spacing: .04em; text-align: left; text-transform: uppercase; }
.schedule-table td { padding: 13px 14px; border-top: 1px solid var(--line); color: #465171; }
.schedule-table tbody tr:nth-child(even) { background: #f8f9fe; }
.schedule-table td:first-child { color: var(--primary-deep); font-weight: 800; }
.schedule-table td:nth-child(3) { color: var(--ink); font-weight: 800; }
.schedule-table td:nth-child(3) a:hover { color: var(--primary); text-decoration: underline; }
.group-choice { padding: 7px 10px; border-radius: 8px; color: var(--primary-deep); background: #fff; font-size: .82rem; font-weight: 800; white-space: nowrap; }
.task-filters { display: flex; gap: 8px; margin: 16px 0; }
.filter-button { border: 1px solid #dce1ed; border-radius: 999px; padding: 8px 13px; color: var(--muted); background: #fff; font-size: .84rem; font-weight: 800; }
.filter-button.active, .filter-button:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-soft); }
.task-list { display: grid; gap: 13px; }
.task-card { padding: 19px; }
.task-topline { display: flex; align-items: flex-start; justify-content: space-between; gap: 14px; }
.task-card h3 { margin: 8px 0 5px; font-size: 1.05rem; letter-spacing: -.015em; }
.task-card p { margin: 0; color: var(--muted); font-size: .89rem; line-height: 1.55; }
.task-card .group-task-deadline { margin-top: 4px; color: #47516a; font-size: .84rem; }
.group-task-deadline strong { color: var(--primary-deep); }
.badge { display: inline-flex; align-items: center; gap: 5px; padding: 5px 8px; border-radius: 999px; font-size: .72rem; font-weight: 800; }
.badge-individu { color: #5c3e98; background: #efeafd; }
.badge-kelompok { color: #087361; background: #dff7ef; }
.due { color: var(--yellow); font-size: .78rem; font-weight: 800; white-space: nowrap; }
.task-actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 14px; }
.task-actions .button { min-height: 37px; padding: 0 12px; font-size: .82rem; }
.group-note { margin: 16px 0 0; padding: 12px 14px; border-radius: 11px; color: #44516e; background: #f0f3fb; font-size: .84rem; line-height: 1.5; }

.group-layout { display: grid; grid-template-columns: .84fr 1.16fr; gap: 20px; margin-top: 22px; }
.group-card { padding: 21px; }
.group-card h2 { margin: 0; font-size: 1.2rem; }
.group-card p { color: var(--muted); line-height: 1.55; }
.group-detail-card { display: grid; gap: 22px; max-width: 720px; margin: 22px auto 0; }
.group-detail-item > strong { display: block; font-size: 1.05rem; }
.group-detail-item .member-list { margin-top: 8px; }
.progress-label { display: flex; justify-content: space-between; margin: 18px 0 7px; color: var(--muted); font-size: .82rem; font-weight: 800; }
.progress-track { overflow: hidden; height: 9px; border-radius: 99px; background: #e7eaf2; }
.progress-value { height: 100%; border-radius: inherit; background: linear-gradient(90deg, #4c67d9, #7289e9); }
.member-list { display: grid; gap: 10px; margin-top: 17px; }
.member-list li { display: grid; grid-template-columns: 38px 1fr; align-items: center; gap: 10px; padding: 10px; border-radius: 11px; background: #f8f9fe; }
.member-avatar { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 50%; color: var(--primary-deep); background: #e5eaff; font-size: .8rem; font-weight: 900; }
.member-list strong { display: block; font-size: .88rem; }
.member-list small { display: block; margin-top: 2px; color: var(--muted); font-size: .75rem; }
.status { padding: 4px 7px; border-radius: 7px; font-size: .68rem; font-weight: 800; white-space: nowrap; }
.status-selesai { color: var(--green); background: #e1f7ec; }
.status-berjalan { color: var(--yellow); background: #fff3dc; }
.status-belum { color: var(--muted); background: #edf0f5; }
.checklist { display: grid; gap: 9px; margin-top: 15px; }
.checklist li { display: flex; gap: 9px; align-items: flex-start; color: #47516a; font-size: .88rem; line-height: 1.45; }
.checklist li::before { content: "✓"; display: grid; flex: 0 0 18px; width: 18px; height: 18px; place-items: center; border-radius: 50%; color: var(--primary); background: var(--primary-soft); font-size: .7rem; font-weight: 900; }
.empty-state { padding: 35px 20px; border: 1px dashed #cbd3e7; border-radius: 16px; color: var(--muted); background: #fff; text-align: center; }
.error-card { margin-top: 22px; padding: 22px; border: 1px solid #efcbcb; border-radius: 15px; color: #832f2f; background: #fff7f7; }
.group-links-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 22px; }
.group-link-card { display: flex; gap: 14px; padding: 21px; border: 1px solid var(--line); border-radius: 17px; background: var(--surface); box-shadow: 0 5px 18px rgba(25,33,59,.035); }
.group-link-icon { display: grid; flex: 0 0 43px; width: 43px; height: 43px; place-items: center; border-radius: 13px; background: #e5eaff; font-size: 1.25rem; }
.group-link-card h2 { margin: 0 0 6px; font-size: 1.1rem; letter-spacing: -.02em; }
.group-link-card p { margin: 0; color: var(--muted); font-size: .86rem; line-height: 1.5; }
.group-link-card .link-note { margin: 13px 0; color: #465171; }
.button-disabled { color: #7d879c; border-color: #dbe0e9; background: #edf0f5; cursor: not-allowed; }

dialog { width: min(520px, calc(100% - 30px)); border: 0; border-radius: 18px; padding: 0; color: var(--ink); box-shadow: 0 24px 60px rgba(20,28,60,.25); }
dialog::backdrop { background: rgba(20,28,60,.46); }
.dialog-content { padding: 24px; }
.dialog-content h2 { margin: 7px 0 8px; }
.dialog-content p { color: var(--muted); line-height: 1.55; }
.dialog-actions { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 9px; }
.dialog-close { float: right; width: 32px; height: 32px; border: 0; border-radius: 8px; color: var(--muted); background: #f1f3f8; font-size: 1.1rem; }
.site-footer { width: min(1100px, calc(100% - 32px)); margin: 0 auto; padding: 0 0 30px; color: var(--muted); font-size: .8rem; text-align: center; }

@media (max-width: 760px) {
  .header-inner { min-height: 62px; }
  .main-nav a { padding: 7px 8px; font-size: .78rem; }
  .brand small { display: none; }
  .page { width: min(100% - 24px, 1100px); padding-top: 22px; }
  .hero { padding: 25px 21px; border-radius: 19px; }
  .stats-grid, .content-grid, .group-layout, .group-links-grid { grid-template-columns: 1fr; }
  .toolbar, .admin-form-grid, .admin-management-grid, .random-group-list { grid-template-columns: 1fr; }
  .admin-task-item { align-items: flex-start; flex-direction: column; }
  .admin-task-actions, .bulk-delete-actions { align-items: flex-start; justify-content: flex-start; }
  .bulk-delete-actions { flex-direction: column; }
  .course-summary { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 430px) {
  .header-inner { width: min(100% - 22px, 1100px); gap: 8px; }
  .brand { font-size: .89rem; }
  .brand-mark { width: 31px; height: 31px; }
  .main-nav { gap: 1px; }
  .main-nav a { padding: 7px 6px; font-size: .71rem; }
  .task-topline { flex-direction: column; }
  .member-list li { grid-template-columns: 34px 1fr; }
  .status { grid-column: 2; justify-self: start; }
}