/* ============================================================
   DLNM Explorer - ICAR-IASRI  |  stylesheet
   ============================================================ */
:root {
  --navy: #0a3247;
  --teal: #0b5d7a;
  --teal-2: #13809f;
  --green: #2e7d32;
  --green-2: #43a047;
  --gold: #f2a900;
  --ink: #1f2d3d;
  --muted: #5f7383;
  --line: #e2e9ef;
  --bg: #f3f6f9;
  --card: #ffffff;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(10, 50, 71, 0.08);
  --shadow-lg: 0 14px 40px rgba(10, 50, 71, 0.16);
}

html, body { background: var(--bg); color: var(--ink); font-family: "Inter", "Segoe UI", system-ui, sans-serif; }
h1, h2, h3, h4, h5 { font-family: "Merriweather", Georgia, serif; color: var(--navy); }
a { color: var(--teal); }

/* ---------------- top banner ---------------- */
.top-banner { background: #fff; border-bottom: 1px solid var(--line); padding: 10px 16px; text-align: center; }
.top-banner img { max-width: 100%; max-height: 104px; height: auto; }
.top-banner a:hover img { opacity: .92; }
.tricolour { height: 5px; background: linear-gradient(90deg, var(--gold) 0 33%, #fff 33% 66%, var(--green) 66% 100%); }

/* ---------------- navbar ---------------- */
.navbar { background: linear-gradient(90deg, var(--navy), var(--teal)) !important; padding: 0 1rem; box-shadow: 0 4px 16px rgba(0,0,0,.12);
  position: sticky; top: 0; z-index: 1030; margin-bottom: 0 !important; }
.navbar .navbar-brand { color: #fff !important; font-family: "Merriweather", serif; font-weight: 700; letter-spacing: .3px; display: flex; align-items: center; gap: 10px; }
.navbar .navbar-brand .brand-badge { background: var(--gold); color: var(--navy); border-radius: 8px; padding: 3px 8px; font-family: "Inter"; font-size: 13px; font-weight: 800; }
.navbar .nav-link { color: rgba(255,255,255,.85) !important; font-weight: 600; padding: 18px 18px !important; border-bottom: 3px solid transparent; transition: all .2s; }
.navbar .nav-link:hover { color: #fff !important; background: rgba(255,255,255,.06); }
.navbar .nav-link.active { color: #fff !important; border-bottom-color: var(--gold); background: rgba(255,255,255,.08); }
.navbar-toggler { border-color: rgba(255,255,255,.5); }
.navbar-toggler-icon { filter: invert(1); }
.navbar + .container-fluid { padding-left: 0 !important; padding-right: 0 !important; }
.navbar + .container-fluid > .tab-content > .tab-pane > .row, .container-fluid > .tab-content { margin: 0; padding: 0; }
.card, .card-body { overflow: visible !important; }
.card-body { flex: 0 0 auto !important; }
table.dataTable td, table.dataTable th { white-space: nowrap; }
.dataTables_wrapper .dt-buttons .btn { background: #eaf3f7; color: var(--teal); border: 1px solid #cfe2ea; }
.dataTables_wrapper .dt-buttons .btn:hover { background: #d9ecf3; }
.dataTables_wrapper .dataTables_filter input { border-radius: 8px; }

/* ---------------- page sections ---------------- */
.page-wrap { max-width: 1320px; margin: 0 auto; padding: 28px 18px 40px; }
.section-title { font-size: 1.6rem; margin: 6px 0 4px; }
.section-sub { color: var(--muted); margin-bottom: 22px; }
.eyebrow { text-transform: uppercase; letter-spacing: 2px; font-size: 12px; font-weight: 700; color: var(--teal-2); }

/* ---------------- hero ---------------- */
.hero { position: relative; overflow: hidden; color: #fff; padding: 64px 18px 74px;
  background:
    radial-gradient(1200px 400px at 85% -10%, rgba(242,169,0,.25), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(67,160,71,.35), transparent 60%),
    linear-gradient(120deg, var(--navy) 0%, var(--teal) 60%, var(--teal-2) 100%); }
.hero::after { content: ""; position: absolute; inset: 0; opacity: .10;
  background-image: linear-gradient(rgba(255,255,255,.6) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.6) 1px, transparent 1px);
  background-size: 42px 42px; pointer-events: none; }
.hero-inner { max-width: 1180px; margin: 0 auto; position: relative; z-index: 1; display: grid; grid-template-columns: 1.35fr 1fr; gap: 40px; align-items: center; }
.hero h1 { color: #fff; font-size: 2.55rem; line-height: 1.2; margin-bottom: 14px; }
.hero h1 .accent { color: var(--gold); }
.hero p.lead { color: rgba(255,255,255,.88); font-size: 1.12rem; max-width: 680px; }
.hero .pill { display: inline-block; background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.28); border-radius: 30px; padding: 6px 14px; font-size: 13px; margin-bottom: 18px; }
.hero-actions { margin-top: 26px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn-gold { background: var(--gold); color: var(--navy) !important; font-weight: 700; border: none; border-radius: 10px; padding: 12px 22px; box-shadow: 0 8px 20px rgba(242,169,0,.35); }
.btn-gold:hover { background: #ffbb1c; transform: translateY(-1px); }
.btn-ghost { background: transparent; color: #fff !important; border: 1.5px solid rgba(255,255,255,.6); border-radius: 10px; padding: 12px 22px; font-weight: 600; }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.hero-card { background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.25); border-radius: 18px; padding: 22px; backdrop-filter: blur(6px); }
.hero-card h5 { color: #fff; font-family: "Inter"; font-weight: 700; margin-bottom: 12px; }
.hero-card .mini-step { display: flex; gap: 12px; align-items: flex-start; padding: 9px 0; border-bottom: 1px dashed rgba(255,255,255,.2); }
.hero-card .mini-step:last-child { border-bottom: 0; }
.hero-card .num { flex: 0 0 30px; height: 30px; border-radius: 50%; background: var(--gold); color: var(--navy); font-weight: 800; display: grid; place-items: center; font-size: 14px; }
.hero-card .mini-step div { font-size: 14px; color: rgba(255,255,255,.92); }

/* ---------------- feature cards ---------------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feature { background: var(--card); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); border-top: 4px solid var(--teal); transition: transform .2s, box-shadow .2s; }
.feature:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature .ico { width: 48px; height: 48px; border-radius: 12px; display: grid; place-items: center; font-size: 22px; color: #fff; margin-bottom: 14px; background: linear-gradient(135deg, var(--teal), var(--teal-2)); }
.feature.g { border-top-color: var(--green); } .feature.g .ico { background: linear-gradient(135deg, var(--green), var(--green-2)); }
.feature.o { border-top-color: var(--gold); } .feature.o .ico { background: linear-gradient(135deg, #d98e00, var(--gold)); }
.feature h4 { font-size: 1.08rem; margin-bottom: 8px; }
.feature p { color: var(--muted); font-size: .95rem; margin: 0; }

.panel { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 26px; margin-bottom: 22px; }
.panel h3 { font-size: 1.25rem; }
.equation { background: #f7fafc; border: 1px solid var(--line); border-left: 4px solid var(--gold); border-radius: 10px; padding: 14px 18px; overflow-x: auto; margin: 12px 0; }
.ref-list li { margin-bottom: 8px; color: var(--muted); font-size: .93rem; }

.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; counter-reset: s; }
.flow .st { background: var(--card); border-radius: 12px; padding: 18px 14px; text-align: center; box-shadow: var(--shadow); position: relative; }
.flow .st i { font-size: 26px; color: var(--teal); margin-bottom: 8px; }
.flow .st b { display: block; color: var(--navy); margin-bottom: 4px; }
.flow .st span { color: var(--muted); font-size: 13px; }
.flow .st:not(:last-child)::after { content: "\279C"; position: absolute; right: -14px; top: 40%; color: var(--gold); font-size: 18px; }

/* ---------------- method: step tabs ---------------- */
.method-tabs > .nav-pills { background: #fff; border-radius: 14px; padding: 8px; box-shadow: var(--shadow); gap: 6px; margin-bottom: 22px; flex-wrap: wrap; }
.method-tabs > .nav-pills .nav-link { border-radius: 10px; color: var(--navy); font-weight: 600; padding: 11px 18px; }
.method-tabs > .nav-pills .nav-link.active { background: linear-gradient(90deg, var(--teal), var(--teal-2)); color: #fff; box-shadow: 0 6px 16px rgba(11,93,122,.3); }
.method-tabs > .nav-pills .nav-link:not(.active):hover { background: #eef5f8; }

.card { border: none; border-radius: var(--radius); box-shadow: var(--shadow); margin-bottom: 20px; }
.card-header { background: #fff; border-bottom: 1px solid var(--line); font-weight: 700; color: var(--navy); padding: 14px 18px; border-radius: var(--radius) var(--radius) 0 0 !important; }
.card-header .sub { display: block; font-weight: 400; color: var(--muted); font-size: 13px; margin-top: 2px; }
.card-header i { color: var(--teal-2); margin-right: 6px; }
.card-y { border-top: 4px solid var(--teal); } .card-x { border-top: 4px solid var(--green); }

.upload-zone .form-group { margin-bottom: 8px; }
.upload-zone .input-group { border: 2px dashed #b8cbd8; border-radius: 12px; padding: 10px; background: #f8fbfd; transition: border-color .2s; }
.upload-zone .input-group:hover { border-color: var(--teal); }
.upload-zone .btn-file { background: var(--teal); color: #fff; border-radius: 8px !important; border: 0; font-weight: 600; }
.card-x .upload-zone .btn-file { background: var(--green); }
.upload-zone .form-control { border: 0; background: transparent; }
.sample-row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; margin: 6px 0 12px; font-size: 13px; color: var(--muted); }
.btn-soft { background: #eaf3f7; color: var(--teal) !important; border: 1px solid #cfe2ea; border-radius: 8px; font-weight: 600; font-size: 13px; padding: 5px 12px; }
.btn-soft:hover { background: #d9ecf3; }
.btn-soft-g { background: #ecf6ec; color: var(--green) !important; border: 1px solid #cfe6d0; }
.btn-soft-g:hover { background: #dcefdc; }
.btn-primary-x { background: linear-gradient(90deg, var(--teal), var(--teal-2)); color: #fff !important; border: 0; border-radius: 10px; font-weight: 700; padding: 10px 20px; box-shadow: 0 6px 16px rgba(11,93,122,.25); }
.btn-primary-x:hover { filter: brightness(1.07); }
.btn-run { background: linear-gradient(90deg, var(--green), var(--green-2)); color: #fff !important; border: 0; border-radius: 12px; font-weight: 800; font-size: 1.1rem; padding: 14px 34px; box-shadow: 0 10px 24px rgba(46,125,50,.35); }
.btn-run:hover { filter: brightness(1.06); transform: translateY(-1px); }
.btn-dl { background: var(--navy); color: #fff !important; border-radius: 10px; font-weight: 700; padding: 12px 22px; border: 0; }
.btn-dl:hover { background: var(--teal); }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat { background: #fff; border-radius: 12px; padding: 16px 18px; box-shadow: var(--shadow); display: flex; gap: 14px; align-items: center; }
.stat .si { width: 44px; height: 44px; flex: 0 0 44px; border-radius: 12px; display: grid; place-items: center; color: #fff; font-size: 18px; background: linear-gradient(135deg, var(--teal), var(--teal-2)); }
.stat.g .si { background: linear-gradient(135deg, var(--green), var(--green-2)); }
.stat.o .si { background: linear-gradient(135deg, #d98e00, var(--gold)); }
.stat.r .si { background: linear-gradient(135deg, #b71c1c, #e53935); }
.stat .sv { font-size: 1.2rem; font-weight: 800; color: var(--navy); line-height: 1.15; word-break: break-word; }
.stat .sl { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .6px; }

.note { background: #f1f8fb; border-left: 4px solid var(--teal-2); border-radius: 8px; padding: 12px 16px; color: #2b4656; font-size: .93rem; margin: 10px 0 16px; }
.note.warn { background: #fff8e6; border-left-color: var(--gold); }
.note.ok { background: #eef7ee; border-left-color: var(--green); }
.note.err { background: #fdecec; border-left-color: #d32f2f; }
.muted { color: var(--muted); font-size: 13px; }
.help { color: var(--muted); font-size: 12px; margin-top: -6px; margin-bottom: 10px; }

.accordion-button { font-weight: 700; color: var(--navy); }
.accordion-button:not(.collapsed) { background: #eef6f9; color: var(--teal); box-shadow: none; }
.accordion-item { border-color: var(--line); }
.run-bar { background: #fff; border-radius: 14px; box-shadow: var(--shadow); padding: 20px 24px; display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin-top: 10px; }

.interp li { margin-bottom: 6px; }
.sig { color: var(--green); font-weight: 700; } .nsig { color: var(--muted); }

table.dataTable thead th { background: #f0f5f8; color: var(--navy); font-weight: 700; }
.dataTables_wrapper .dt-buttons .btn, .dt-button { border-radius: 8px !important; font-size: 12px !important; }
.nav-tabs .nav-link { font-weight: 600; color: var(--muted); }
.nav-tabs .nav-link.active { color: var(--teal); border-top: 3px solid var(--teal); }

/* ---------------- instructions ---------------- */
.ins-step { display: flex; gap: 18px; background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; margin-bottom: 16px; }
.ins-step .n { flex: 0 0 48px; height: 48px; border-radius: 14px; background: linear-gradient(135deg, var(--teal), var(--teal-2)); color: #fff; font-weight: 800; font-size: 20px; display: grid; place-items: center; }
.ins-step h4 { font-size: 1.12rem; margin-bottom: 6px; }
.ins-step ul { padding-left: 18px; margin: 6px 0 0; } .ins-step li { margin-bottom: 4px; }
.mini-table { border-collapse: collapse; font-size: 13px; margin: 8px 0; }
.mini-table th, .mini-table td { border: 1px solid var(--line); padding: 5px 10px; text-align: center; }
.mini-table th { background: #f0f5f8; color: var(--navy); }
.param-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.param-table th { background: var(--navy); color: #fff; padding: 9px 12px; text-align: left; }
.param-table td { border-bottom: 1px solid var(--line); padding: 8px 12px; vertical-align: top; }
.param-table tr:nth-child(even) td { background: #f8fbfd; }
.param-table td:first-child { font-weight: 700; color: var(--navy); white-space: nowrap; }

/* ---------------- developers ---------------- */
.dev-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.dev { background: #fff; border-radius: 18px; box-shadow: var(--shadow); overflow: hidden; text-align: center; transition: transform .25s, box-shadow .25s; }
.dev:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.dev .band { height: 96px; background: linear-gradient(120deg, var(--navy), var(--teal-2)); }
.dev img { width: 150px; height: 150px; border-radius: 50%; object-fit: cover; object-position: center top; border: 5px solid #fff; margin-top: -75px; box-shadow: 0 8px 22px rgba(0,0,0,.18); background: #fff; }
.dev .body { padding: 14px 22px 26px; }
.dev h4 { font-size: 1.2rem; margin: 10px 0 4px; }
.dev .role { color: var(--teal); font-weight: 700; font-size: .95rem; }
.dev .org { color: var(--muted); font-size: .9rem; margin-bottom: 14px; }
.dev .links { display: flex; flex-direction: column; gap: 8px; }
.dev .links a { display: flex; align-items: center; justify-content: center; gap: 8px; border-radius: 10px; padding: 9px 12px; font-size: 14px; font-weight: 600; text-decoration: none; }
.dev .links a.mail { background: #eaf3f7; color: var(--teal); }
.dev .links a.gs { background: var(--navy); color: #fff; }
.dev .links a:hover { filter: brightness(1.08); }

/* ---------------- footer ---------------- */
.site-footer { background: var(--navy); color: rgba(255,255,255,.85); padding: 26px 18px 18px; margin-top: 30px; border-top: 4px solid var(--gold); }
.site-footer .fi { max-width: 1320px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; gap: 18px; flex-wrap: wrap; }
.site-footer a { color: #fff; text-decoration: none; font-weight: 600; }
.site-footer a:hover { color: var(--gold); }
.site-footer .copy { font-size: 14px; }
.site-footer .addr { font-size: 12.5px; color: rgba(255,255,255,.65); margin-top: 4px; }
.visitor { display: flex; align-items: center; gap: 10px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.18); border-radius: 12px; padding: 8px 16px; }
.visitor .vn { font-family: "Courier New", monospace; font-size: 1.25rem; font-weight: 800; color: var(--gold); letter-spacing: 2px; }
.visitor .vl { font-size: 12px; text-transform: uppercase; letter-spacing: 1px; }

/* progress bar */
.shiny-notification { border-radius: 12px; box-shadow: var(--shadow-lg); border-left: 5px solid var(--teal); }
.progress-bar { background-color: var(--green) !important; }

/* ---------------- responsive ---------------- */
@media (max-width: 992px) {
  .hero-inner { grid-template-columns: 1fr; }
  .feature-grid, .dev-grid { grid-template-columns: 1fr 1fr; }
  .flow { grid-template-columns: 1fr 1fr; }
  .flow .st::after { display: none; }
}
@media (max-width: 640px) {
  .hero h1 { font-size: 1.8rem; }
  .feature-grid, .dev-grid, .flow { grid-template-columns: 1fr; }
  .navbar .nav-link { padding: 12px !important; }
  .ins-step { flex-direction: column; }
}

/* DataTables buttons & search: consistent look across DT versions */
.dt-buttons { display: inline-flex; gap: 6px; margin-bottom: 10px; }
.dt-buttons > a, .dt-buttons > button, .dt-buttons .dt-button {
  display: inline-flex !important; align-items: center; background: #eaf3f7 !important; color: var(--teal) !important;
  border: 1px solid #cfe2ea !important; border-radius: 8px !important; padding: 5px 14px !important;
  font-size: 12.5px !important; font-weight: 700; text-decoration: none !important; cursor: pointer; box-shadow: none !important; }
.dt-buttons > a:hover, .dt-buttons > button:hover { background: #d9ecf3 !important; }
.dataTables_filter input, .dataTables_wrapper input[type="search"] {
  border: 1px solid #cfdbe4 !important; border-radius: 8px !important; padding: 5px 10px !important; outline: none; margin-left: 6px; }
.dataTables_filter input:focus { border-color: var(--teal) !important; box-shadow: 0 0 0 3px rgba(11,93,122,.12) !important; }
table.dataTable thead input, table.dataTable thead .form-control { font-size: 12px; border-radius: 6px; }
.dataTables_wrapper .pagination .page-item.active .page-link { background: var(--teal); border-color: var(--teal); }
.dataTables_wrapper .page-link { color: var(--teal); }

/* four team members: 4 across on wide screens, 2 on medium, 1 on phones */
.dev-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 22px; }
.dev .links a { font-size: 13px; word-break: break-all; }
@media (max-width: 1200px) { .dev-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 640px)  { .dev-grid { grid-template-columns: 1fr; } }