/* ==========================================================================
   Kash Examination System — Sign-in pages v3 (Round 219)
   Shared by admin/login.php (body.kv3-green) and frontend/login.php (body.kv3-blue).
   Light + dark (html[data-theme="dark"]), phone-first fallbacks at the bottom.
   ========================================================================== */

.kv3 {
  --a1: #16a34a; --a2: #22c55e; --a3: #15803d; --a-soft: #e8f7ee; --a-soft2: #d3f0dd; --a-ink: #166534; --a-glow: rgba(22, 163, 74, .35);
  --kick: #4f46e5; --accent2: #65a30d;
  --ink: #0b1b33; --text: #334155; --muted: #64748b; --line: #dfe7ef; --field: #ffffff; --card: rgba(255, 255, 255, .94);
  --canvas: #f3faf6; --chip: #ffffff; --shadow: 0 30px 70px -36px rgba(15, 45, 30, .35), 0 2px 6px rgba(15, 30, 50, .04);
  margin: 0; min-height: 100vh; font-family: 'Plus Jakarta Sans', 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color: var(--text); background: var(--canvas); -webkit-font-smoothing: antialiased;
}
.kv3.kv3-blue {
  --a1: #2563eb; --a2: #3b82f6; --a3: #1d4ed8; --a-soft: #eaf1ff; --a-soft2: #d6e4ff; --a-ink: #1e40af; --a-glow: rgba(37, 99, 235, .35);
  --kick: #1d4ed8; --accent2: #2563eb; --canvas: #f2f7ff;
}
.kv3 *, .kv3 *::before, .kv3 *::after { box-sizing: border-box; }
:where(.kv3) a { color: inherit; }

.kv3-bg { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden;
  background: radial-gradient(900px 600px at 8% -10%, color-mix(in srgb, var(--a2) 16%, transparent), transparent 60%),
              radial-gradient(800px 700px at 62% 40%, color-mix(in srgb, var(--a2) 12%, transparent), transparent 62%),
              radial-gradient(700px 520px at 100% 100%, color-mix(in srgb, var(--a2) 14%, transparent), transparent 60%), var(--canvas); }
.kv3-bg::before { content: ""; position: absolute; width: 640px; height: 640px; right: 26%; top: 8%; border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, color-mix(in srgb, var(--a2) 14%, transparent), transparent 70%); }
.kv3-bg .photo { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: .2; filter: saturate(.9) blur(1px);
  -webkit-mask-image: linear-gradient(90deg, transparent 0%, #000 35%, #000 80%, transparent 100%); mask-image: linear-gradient(90deg, transparent 0%, #000 35%, #000 80%, transparent 100%); }
.kv3-bg .dots { position: absolute; width: 120px; height: 90px; background-image: radial-gradient(color-mix(in srgb, var(--a1) 35%, transparent) 1.4px, transparent 1.6px); background-size: 14px 14px; opacity: .6; }

.kv3-page { position: relative; z-index: 1; min-height: 100vh; display: flex; flex-direction: column; max-width: 1480px; margin: 0 auto; padding: 22px 48px 0; }
.kv3-top { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.kv3-brand { display: flex; align-items: center; gap: 16px; text-decoration: none; }
.kv3-brand .logo { width: 50px; height: 50px; border-radius: 16px; background: linear-gradient(135deg, var(--a1), var(--a3)); display: flex; align-items: center; justify-content: center; overflow: hidden; box-shadow: 0 12px 24px -12px var(--a-glow); flex-shrink: 0; }
.kv3-brand .logo { color: #fff; }
.kv3-brand .logo img { width: 100%; height: 100%; object-fit: contain; }
.kv3-brand .logo svg { width: 64%; height: 64%; }
.kv3-brand strong { display: block; font-size: 18px; font-weight: 800; color: var(--ink); letter-spacing: -.01em; }
.kv3-brand span { display: block; font-size: 13px; color: var(--text); margin-top: 3px; }
.kv3-toplink { display: inline-flex; align-items: center; gap: 9px; font-size: 14px; font-weight: 600; color: var(--ink); text-decoration: none; padding: 9px 14px; border-radius: 12px; }
.kv3-toplink:hover { background: var(--chip); }
.kv3-toplink.pill { border: 1px solid color-mix(in srgb, var(--a1) 35%, transparent); background: color-mix(in srgb, var(--chip) 70%, transparent); color: var(--a-ink); border-radius: 999px; padding: 9px 20px; }
.kv3-toplink.pill i { color: var(--a1); }

.kv3-main { flex: 1; display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(380px, 500px); gap: 48px; align-items: start; padding: 12px 0 12px; }
.kv3-hero { min-width: 0; padding-top: 22px; display: flex; flex-direction: column; }
.kv3-badge { display: inline-flex; align-items: center; gap: 9px; width: fit-content; padding: 8px 15px; border-radius: 14px; background: color-mix(in srgb, var(--chip) 85%, transparent); border: 1px solid color-mix(in srgb, var(--a1) 22%, transparent); color: var(--a-ink); font-weight: 800; font-size: 13px; letter-spacing: .03em; text-transform: uppercase; box-shadow: 0 8px 20px -14px var(--a-glow); }
.kv3-blue .kv3-badge { background: color-mix(in srgb, var(--a-soft) 90%, transparent); }
.kv3-badge i { color: var(--a1); font-size: 15px; }
.kv3-hero h1 { margin: 18px 0 12px; font-size: clamp(32px, 3.3vw, 48px); line-height: 1.04; font-weight: 800; letter-spacing: -.035em; color: var(--ink); }
.kv3-hero h1 .g1 { color: var(--a3); }
.kv3-hero h1 .g2 { background: linear-gradient(135deg, var(--accent2), #84cc16); -webkit-background-clip: text; background-clip: text; color: transparent; }
.kv3-blue .kv3-hero h1 .g2 { background: linear-gradient(135deg, #2563eb, #0ea5e9); -webkit-background-clip: text; background-clip: text; }
.kv3-hero > p { margin: 0 0 20px; font-size: 16px; line-height: 1.45; color: var(--text); max-width: 560px; }
.kv3-feats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; max-width: 708px; }
.kv3-feat { display: flex; align-items: center; gap: 14px; padding: 12px 14px; border-radius: 16px; background: color-mix(in srgb, var(--chip) 88%, transparent); border: 1px solid color-mix(in srgb, var(--line) 80%, transparent); box-shadow: 0 14px 30px -24px rgba(15, 30, 50, .4); backdrop-filter: blur(6px); }
.kv3-feat .ic { width: 46px; height: 46px; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 19px; flex-shrink: 0; }
.kv3-feat strong { display: block; font-size: 14.5px; font-weight: 700; color: var(--ink); }
.kv3-feat span { display: block; font-size: 12.5px; color: var(--muted); margin-top: 3px; }
.kv3-feats.four { grid-template-columns: repeat(4, minmax(0, 1fr)); max-width: 720px; gap: 18px; }
.kv3-feats.four .kv3-feat { flex-direction: column; align-items: flex-start; gap: 12px; padding: 14px 16px 16px; }
.kv3-feats.four .ic { width: 44px; height: 44px; border-radius: 11px; font-size: 18px; color: #fff; }
.kv3-feats.four strong { font-size: 14.5px; }
.kv3-feats.four span { font-size: 12.5px; }
.ic.v { background: #f1ebff; color: #7c3aed; } .ic.g { background: #e3f7ea; color: #16a34a; } .ic.y { background: #fff4d6; color: #f59e0b; } .ic.r { background: #ffe9ec; color: #e11d48; }
.kv3-feats.four .ic.v { background: linear-gradient(135deg, #c084fc, #9333ea); } .kv3-feats.four .ic.b { background: linear-gradient(135deg, #60a5fa, #2563eb); }
.kv3-feats.four .ic.g { background: linear-gradient(135deg, #4ade80, #16a34a); } .kv3-feats.four .ic.y { background: linear-gradient(135deg, #fbbf24, #f97316); }

.kv3-art { position: relative; margin-top: 14px; margin-left: -48px; container-type: inline-size; max-width: 820px; }
.kv3-art img { display: block; width: 100%; height: auto; -webkit-mask-image: radial-gradient(120% 95% at 50% 60%, #000 62%, transparent 100%); mask-image: radial-gradient(120% 95% at 50% 60%, #000 62%, transparent 100%); }
.kv3-art .ov { position: absolute; font-family: inherit; color: #0b1b33; line-height: 1.15; }
.kv3-art .ov-stu { left: 42.4%; top: 22.6%; width: 10.6%; }
.kv3-art .ov-stu b { display: block; font-size: 2.15cqw; font-weight: 800; letter-spacing: -.01em; }
.kv3-art .ov-stu small { display: block; font-size: 1.05cqw; color: #16a34a; font-weight: 700; margin-top: .15cqw; }

/* Overlay cards painted onto the student illustration (positions in % of the 930×491 artwork) */
.kv3-art .oc { position: absolute; transform: translate(-50%, -50%) rotate(var(--r, 0deg)); background: #fff; border-radius: 1.6cqw; box-shadow: 0 1.4cqw 3cqw -1.6cqw rgba(30, 64, 175, .35); padding: 1.3cqw 1.5cqw; color: #0b1b33; font-size: 1.35cqw; line-height: 1.25; }
.kv3-art .oc b { font-weight: 700; }
.kv3-art .oc small { color: #64748b; font-size: 1.15cqw; display: block; }
.kv3-art .oc.prog { left: 25.3%; top: 23.6%; width: 19.6%; height: 33.4%; --r: 3.5deg; }
.kv3-art .oc.prog .ring { width: 6.6cqw; height: 6.6cqw; margin: .9cqw 0 .7cqw; border-radius: 50%; background: conic-gradient(#2563eb calc(var(--p) * 1%), #e5edfb 0); display: flex; align-items: center; justify-content: center; }
.kv3-art .oc.prog .ring span { width: 5.2cqw; height: 5.2cqw; border-radius: 50%; background: #fff; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 1.5cqw; }
.kv3-art .oc.exam { left: 75.7%; top: 18.9%; width: 27.9%; height: 18.6%; --r: 5.7deg; display: flex; align-items: center; gap: 1.2cqw; }
.kv3-art .oc .tile { width: 4.4cqw; height: 4.4cqw; border-radius: 1.1cqw; flex-shrink: 0; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 1.9cqw; }
.kv3-art .oc.mat { left: 67.7%; top: 39.1%; width: 21.2%; height: 16.6%; --r: 7deg; display: flex; align-items: center; gap: 1.1cqw; }
.kv3-art .oc.rank { left: 88%; top: 48.1%; width: 18.4%; height: 19.8%; --r: 7deg; }
.kv3-art .oc.rank b.big { display: block; font-size: 2.3cqw; font-weight: 800; margin-top: .3cqw; }
.kv3-art .oc .one { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; }

/* ---------- Sign-in card ---------- */
.kv3-card { position: relative; background: var(--card); border: 1px solid color-mix(in srgb, var(--line) 75%, transparent); border-radius: 26px; padding: 30px 32px 24px; box-shadow: var(--shadow); backdrop-filter: blur(14px); margin-top: 6px; }
.kv3-theme { position: absolute; top: 20px; right: 24px; display: flex; gap: 4px; padding: 4px; border-radius: 14px; background: color-mix(in srgb, var(--line) 55%, transparent); border: 1px solid var(--line); }
.kv3-theme button { width: 44px; height: 34px; border: 0; border-radius: 10px; cursor: pointer; font-size: 15px; display: flex; align-items: center; justify-content: center; background: transparent; color: var(--muted); }
.kv3-theme button[aria-pressed="true"] { background: var(--field); color: var(--ink); box-shadow: 0 4px 10px -6px rgba(0, 0, 0, .35); }
.kv3-theme button.moon[aria-pressed="false"] { background: #475569; color: #fff; }
.kv3-theme button.sun[aria-pressed="false"] { background: #fbbf24; color: #3b2a00; }
.kv3-kick { display: inline-flex; align-items: center; gap: 10px; font-size: 12.5px; font-weight: 800; letter-spacing: .03em; text-transform: uppercase; color: var(--kick); }
.kv3-card h2 { margin: 12px 0 8px; font-size: 28px; line-height: 1.1; font-weight: 800; letter-spacing: -.025em; color: var(--ink); }
.kv3-card .sub { margin: 0 0 18px; font-size: 14.5px; color: var(--text); line-height: 1.5; }

.kv3-tabs { display: grid; grid-auto-columns: minmax(0, 1fr); grid-auto-flow: column; padding: 4px; border-radius: 16px; background: color-mix(in srgb, var(--line) 35%, var(--field)); border: 1px solid var(--line); margin-bottom: 18px; }
.kv3-tabs button { position: relative; border: 0; background: transparent; padding: 10px 6px; border-radius: 12px; cursor: pointer; font-family: inherit; font-size: 13px; font-weight: 600; color: var(--text); display: flex; flex-direction: column; align-items: center; gap: 7px; }
.kv3-tabs button i { font-size: 17px; color: var(--muted); }
.kv3-tabs button + button::before { content: ""; position: absolute; left: 0; top: 22%; bottom: 22%; border-left: 1px solid var(--line); }
.kv3-tabs button[aria-selected="true"]::before, .kv3-tabs button[aria-selected="true"] + button::before { display: none; }
.kv3-tabs button[aria-selected="true"] { background: var(--a-soft); color: var(--a-ink); }
.kv3-tabs button[aria-selected="true"] i { color: var(--a1); }
.kv3-blue .kv3-tabs button[aria-selected="true"] { background: linear-gradient(135deg, var(--a2), var(--a1)); color: #fff; box-shadow: 0 10px 20px -12px var(--a-glow); }
.kv3-blue .kv3-tabs button[aria-selected="true"] i { color: #fff; }
.kv3-tabs button:focus-visible { outline: 2px solid var(--a2); outline-offset: 1px; }

.kv3-field { margin-bottom: 14px; }
.kv3-field label { display: block; font-size: 13.5px; font-weight: 700; color: var(--ink); margin-bottom: 7px; }
.kv3-input { position: relative; }
.kv3-input > i { position: absolute; left: 17px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 17px; pointer-events: none; }
.kv3-input input { width: 100%; height: 48px; margin: 0; box-shadow: none; border-radius: 12px; border: 1px solid var(--line); background: var(--field); padding: 0 48px 0 48px; font-family: inherit; font-size: 14px; color: var(--ink); transition: border-color .15s, box-shadow .15s; }
.kv3-input input::placeholder { color: #94a3b8; }
.kv3-input input:focus { outline: none; border-color: var(--a2); box-shadow: 0 0 0 4px color-mix(in srgb, var(--a2) 18%, transparent); }
.kv3-input .eye { position: absolute; right: 8px; top: 50%; transform: translateY(-50%); width: 38px; height: 38px; border: 0; background: transparent; border-radius: 10px; color: var(--muted); cursor: pointer; font-size: 16px; }
.kv3-input .eye:hover { background: color-mix(in srgb, var(--line) 50%, transparent); }
.kv3-input input.pin { letter-spacing: .5em; font-size: 20px; font-weight: 700; }
.kv3-hint { font-size: 12.5px; color: var(--muted); margin-top: 7px; }
.kv3-hint a { color: var(--a1); font-weight: 600; }
.kv3-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 2px 0 16px; font-size: 13.5px; }
.kv3-check { display: inline-flex; align-items: center; gap: 10px; color: var(--text); cursor: pointer; }
.kv3-check input { width: 19px; height: 19px; accent-color: var(--a1); margin: 0; }
.kv3-link { color: var(--a1) !important; font-weight: 700; text-decoration: none; background: none; border: 0; cursor: pointer; font-family: inherit; font-size: 13.5px; padding: 0; }
.kv3-link:hover { text-decoration: underline; }
.kv3-help { display: none; margin: -8px 0 18px; padding: 12px 14px; border-radius: 12px; background: var(--a-soft); color: var(--a-ink); font-size: 13px; line-height: 1.5; }
.kv3-help.on { display: block; }

.kv3-btn { width: 100%; height: 50px; border: 0; border-radius: 14px; cursor: pointer; font-family: inherit; font-size: 15.5px; font-weight: 700; color: #fff; display: inline-flex; align-items: center; justify-content: center; gap: 12px; text-decoration: none;
  background: linear-gradient(90deg, var(--a3), var(--a2)); box-shadow: 0 16px 30px -16px var(--a-glow); transition: transform .15s, box-shadow .15s, filter .15s; }
.kv3-green .kv3-btn { background: linear-gradient(90deg, #15803d 0%, #22c55e 70%, #4ade80 100%); }
.kv3-blue .kv3-btn { background: linear-gradient(90deg, #1d4ed8 0%, #3b82f6 60%, #38bdf8 100%); }
.kv3-btn:hover { transform: translateY(-1px); filter: brightness(1.04); }
.kv3-btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

.kv3-or { display: flex; align-items: center; gap: 16px; margin: 18px 0 14px; font-size: 13px; color: var(--muted); }
.kv3-or::before, .kv3-or::after { content: ""; flex: 1; border-top: 1px solid var(--line); }
.kv3-alts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.kv3-alt { display: flex; align-items: center; gap: 10px; padding: 8px 12px; height: 50px; border-radius: 14px; border: 1px solid var(--line); background: var(--field); color: var(--ink); font-family: inherit; font-size: 13.5px; font-weight: 600; cursor: pointer; text-decoration: none; text-align: left; transition: border-color .15s, box-shadow .15s; }
.kv3-alt:hover { border-color: color-mix(in srgb, var(--a1) 45%, transparent); box-shadow: 0 10px 20px -16px var(--a-glow); }
.kv3-alt .ai { width: 34px; height: 34px; border-radius: 10px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 17px; }
.kv3-alt .ai.pin { background: #eef0ff; color: #4f46e5; }
.kv3-alt .ai.bio { background: var(--a-soft); color: var(--a1); }
.kv3-alt .lbl { flex: 1; min-width: 0; }
.kv3-alt .go { color: var(--a1); font-size: 14px; }
.kv3-alt.google { grid-column: 1 / -1; justify-content: center; position: relative; }
.kv3-alt.google .lbl { flex: none; }
.kv3-alt.google .go { position: absolute; right: 22px; }
.kv3-alt.google svg { width: 24px; height: 24px; }
.kv3-alt[hidden] { display: none; }

.kv3-bio { text-align: center; padding: 8px 4px 4px; }
.kv3-bio .fp { width: 76px; height: 76px; margin: 4px auto 14px; border-radius: 50%; background: var(--a-soft); color: var(--a1); display: flex; align-items: center; justify-content: center; font-size: 40px; box-shadow: 0 0 0 10px color-mix(in srgb, var(--a-soft) 55%, transparent); }
.kv3-bio p { margin: 0 0 18px; font-size: 14.5px; color: var(--text); line-height: 1.5; }
.kv3-msg { min-height: 20px; margin-top: 12px; font-size: 13.5px; color: var(--muted); text-align: center; }
.kv3-msg.err { color: #dc2626; }

.kv3-alert { display: flex; gap: 10px; align-items: flex-start; padding: 12px 14px; border-radius: 12px; font-size: 14px; margin-bottom: 18px; line-height: 1.45; }
.kv3-alert.err { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.kv3-alert.ok { background: #f0fdf4; color: #166534; border: 1px solid #bbf7d0; }
.kv3-alert i { margin-top: 2px; }

.kv3-secure { display: flex; gap: 14px; align-items: flex-start; margin-top: 16px; padding: 13px 16px; border-radius: 14px; background: color-mix(in srgb, var(--line) 30%, var(--field)); border: 1px solid var(--line); font-size: 12.5px; line-height: 1.55; color: var(--text); }
.kv3-blue .kv3-secure { background: var(--a-soft); border-color: transparent; }
.kv3-secure i { font-size: 20px; color: var(--a1); margin-top: 2px; }
.kv3-secure strong { display: block; font-size: 13.5px; color: var(--ink); margin-bottom: 3px; }
.kv3-captcha { margin-bottom: 18px; }
.kv3-panel[hidden] { display: none; }

.kv3-foot { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding: 20px 0 24px; font-size: 14px; color: var(--text); }
.kv3-foot b { color: var(--ink); }
.kv3-foot .sep { color: var(--muted); margin: 0 12px; }
.kv3-foot nav { display: flex; align-items: center; flex-wrap: wrap; }
.kv3-foot nav a { color: var(--text); text-decoration: none; }
.kv3-blue .kv3-foot nav a { color: var(--a-ink); }
.kv3-foot nav a:hover { text-decoration: underline; }

/* ---------- Embedded inside the website header/footer (student login + register) ---------- */
.kv3.kv3-embed { min-height: 0; position: relative; overflow: hidden; font-family: var(--k-font, 'Inter', system-ui, sans-serif); font-size: 14.5px; line-height: 1.5; }
.kv3-embed .kv3-bg { position: absolute; }
.kv3-embed .kv3-page { min-height: 0; padding: 30px 40px 40px; }
.kv3-embed .kv3-main { padding: 0; }
.kv3-embed h1, .kv3-embed h2, .kv3-embed h3 { font-family: inherit; }
.kv3-embed .kv3-art { margin-left: -40px; }
.kv3-embed .kv3-alert { font-size: 13.5px; }

/* ---------- Register (same theme) ---------- */
.kv3-steps { display: flex; align-items: center; gap: 8px; margin: 0 0 18px; }
.kv3-steps .st { display: flex; align-items: center; gap: 8px; font-size: 12.5px; font-weight: 600; color: var(--muted); white-space: nowrap; }
.kv3-steps .st b { width: 28px; height: 28px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; font-size: 12.5px; background: var(--field); border: 1.5px solid var(--line); color: var(--muted); }
.kv3-steps .st.on { color: var(--ink); }
.kv3-steps .st.on b { background: linear-gradient(135deg, var(--a2), var(--a1)); border-color: transparent; color: #fff; box-shadow: 0 8px 16px -10px var(--a-glow); }
.kv3-steps .st.done b { background: var(--a-soft); border-color: transparent; color: var(--a1); }
.kv3-steps .ln { flex: 1; min-width: 14px; height: 2px; border-radius: 2px; background: var(--line); }
.kv3-steps .ln.done { background: var(--a2); }
.kv3-step { display: none; }
.kv3-step.on { display: block; animation: kv3in .2s ease; }
@keyframes kv3in { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.kv3-grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 14px; }
.kv3-input select { width: 100%; height: 48px; border-radius: 12px; border: 1px solid var(--line); background: var(--field); padding: 0 14px 0 48px; font-family: inherit; font-size: 14px; color: var(--ink); appearance: auto; margin: 0; }
.kv3-input select:focus { outline: none; border-color: var(--a2); box-shadow: 0 0 0 4px color-mix(in srgb, var(--a2) 18%, transparent); }
.kv3-input input[type="date"] { padding-right: 14px; }
.kv3-input .pre { position: absolute; left: 44px; top: 50%; transform: translateY(-50%); font-size: 14px; font-weight: 600; color: var(--ink); }
.kv3-input input.has-pre { padding-left: 82px; }
.kv3-opt { font-weight: 500; color: var(--muted); font-size: 12px; }
.kv3-nav2 { display: grid; grid-template-columns: 120px minmax(0, 1fr); gap: 12px; margin-top: 4px; }
.kv3-btn.ghost { background: var(--field) !important; color: var(--ink); border: 1px solid var(--line); box-shadow: none; }
.kv3-btn.ghost:hover { border-color: var(--a2); }
.kv3-terms { display: flex; gap: 10px; align-items: flex-start; font-size: 13px; color: var(--text); margin: 4px 0 16px; cursor: pointer; }
.kv3-terms input { width: 18px; height: 18px; margin: 1px 0 0; accent-color: var(--a1); flex-shrink: 0; }
.kv3-terms a { color: var(--a1); font-weight: 600; }
.kv3-switch { text-align: center; font-size: 13.5px; color: var(--text); margin: 14px 0 0; }
.kv3-switch a { color: var(--a1); font-weight: 700; }
.kv3-hint a { text-decoration: none; }

/* ---------- Dark ---------- */
html[data-theme="dark"] .kv3 {
  --ink: #eef4f8; --text: #c3d0db; --muted: #8b9aab; --line: #263444; --field: #0f1924; --card: rgba(13, 22, 32, .92); --chip: #111c28;
  --canvas: #08111a; --a-soft: color-mix(in srgb, var(--a1) 18%, transparent); --a-ink: color-mix(in srgb, var(--a2) 75%, #fff); --kick: #a5b4fc;
  --shadow: 0 30px 70px -30px rgba(0, 0, 0, .7);
}
html[data-theme="dark"] .kv3-art img { filter: brightness(.82) saturate(.95); -webkit-mask-image: radial-gradient(62% 60% at 50% 55%, #000 55%, transparent 100%); mask-image: radial-gradient(62% 60% at 50% 55%, #000 55%, transparent 100%); }
html[data-theme="dark"] .kv3-alert.err { background: rgba(220, 38, 38, .12); border-color: rgba(220, 38, 38, .3); color: #fca5a5; }
html[data-theme="dark"] .kv3-alert.ok { background: rgba(22, 163, 74, .12); border-color: rgba(22, 163, 74, .3); color: #86efac; }
html[data-theme="dark"] .kv3-alt .ai.pin { background: rgba(99, 102, 241, .18); color: #a5b4fc; }
html[data-theme="dark"] .kv3-bg .photo { opacity: .12; }
html[data-theme="dark"] .ic.v { background: rgba(124, 58, 237, .2); } html[data-theme="dark"] .ic.g { background: rgba(22, 163, 74, .2); }
html[data-theme="dark"] .ic.y { background: rgba(245, 158, 11, .2); } html[data-theme="dark"] .ic.r { background: rgba(225, 29, 72, .2); }

/* ---------- Responsive ---------- */
@media (max-width: 1280px) {
  .kv3-page { padding: 20px 28px 0; }
  .kv3-main { gap: 34px; grid-template-columns: minmax(0, 1fr) minmax(360px, 500px); }
  .kv3-feats.four { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kv3-card { padding: 34px 28px 26px; }
}
@media (max-width: 1020px) {
  .kv3-embed .kv3-page { padding: 22px 22px 32px; }
  .kv3-embed .kv3-art { margin-left: 0; }
  .kv3-main { grid-template-columns: minmax(0, 1fr); }
  .kv3-hero { order: 2; padding-top: 0; }
  .kv3-card { order: 1; max-width: 560px; width: 100%; margin: 0 auto; }
  .kv3-art { margin-left: 0; }
}
@media (max-width: 560px) {
  .kv3-page, .kv3-embed .kv3-page { padding: 14px 16px 0; }
  .kv3-embed .kv3-page { padding-bottom: 26px; }
  .kv3-grid2 { grid-template-columns: minmax(0, 1fr); }
  .kv3-steps .st span { display: none; }
  .kv3-brand .logo { width: 44px; height: 44px; border-radius: 12px; }
  .kv3-brand strong { font-size: 16px; }
  .kv3-brand span { font-size: 12px; }
  .kv3-toplink .t { display: none; }
  .kv3-toplink.pill { padding: 9px 12px; }
  .kv3-card { padding: 26px 18px 20px; border-radius: 22px; }
  .kv3-theme { top: 18px; right: 16px; }
  .kv3-theme button { width: 36px; height: 30px; }
  .kv3-card h2 { font-size: 27px; margin-top: 12px; }
  .kv3-card .sub { font-size: 14.5px; }
  .kv3-tabs button { font-size: 12px; padding: 10px 4px; }
  .kv3-alts { grid-template-columns: minmax(0, 1fr); }
  .kv3-feats, .kv3-feats.four { grid-template-columns: minmax(0, 1fr); }
  .kv3-hero > p { font-size: 16px; }
  .kv3-foot { flex-direction: column; align-items: flex-start; gap: 8px; }
}

/* ---------- Round 219d: interactive hero cards (login + register) ---------- */
@property --p { syntax: '<number>'; inherits: false; initial-value: 0; }
.kv3-ix { position: relative; overflow: hidden; text-decoration: none !important; cursor: pointer; isolation: isolate;
  transform: perspective(700px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)); transform-style: preserve-3d;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease, background .25s ease; }
.kv3-ix::before { content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0; transition: opacity .25s ease;
  background: radial-gradient(240px circle at var(--mx, 50%) var(--my, 0%), color-mix(in srgb, var(--a2) 20%, transparent), transparent 65%); }
.kv3-ix:hover, .kv3-ix:focus-visible { transform: perspective(700px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) translateY(-6px);
  border-color: color-mix(in srgb, var(--a1) 40%, transparent); box-shadow: 0 26px 44px -24px var(--a-glow); background: var(--chip); }
.kv3-ix:hover::before, .kv3-ix:focus-visible::before { opacity: 1; }
.kv3-ix:focus-visible { outline: 3px solid color-mix(in srgb, var(--a2) 55%, transparent); outline-offset: 3px; }
.kv3-ix .ic { transition: transform .3s cubic-bezier(.34, 1.56, .64, 1), box-shadow .3s ease; }
.kv3-ix:hover .ic, .kv3-ix:focus-visible .ic { transform: scale(1.1) rotate(-7deg); box-shadow: 0 12px 20px -10px currentColor; }
.kv3-ix:active { transform: perspective(700px) translateY(-2px) scale(.98); }
.kv3-feats .kv3-ix .more { display: flex; align-items: center; gap: 6px; font-style: normal; font-size: 12px; font-weight: 700; color: var(--a1);
  max-height: 0; opacity: 0; margin-top: 0; overflow: hidden; transition: max-height .25s ease, opacity .25s ease, margin-top .25s ease; }
.kv3-feats .kv3-ix .more i { font-size: 10px; transition: transform .25s ease; }
.kv3-ix:hover .more, .kv3-ix:focus-visible .more { max-height: 40px; opacity: 1; margin-top: 8px; }
.kv3-ix:hover .more i { transform: translateX(3px); }

.kv3-art a.oc { text-decoration: none; color: #0b1b33; cursor: pointer; z-index: 2;
  animation: kv3float 6s ease-in-out var(--d, 0s) infinite; transition: box-shadow .25s ease, scale .25s ease; }
.kv3-art a.oc:hover, .kv3-art a.oc:focus-visible { animation-play-state: paused; scale: 1.07; z-index: 4; box-shadow: 0 2.4cqw 4.4cqw -1.8cqw rgba(30, 64, 175, .55); }
.kv3-art a.oc:focus-visible { outline: 3px solid rgba(59, 130, 246, .55); outline-offset: 3px; }
@keyframes kv3float {
  0%, 100% { transform: translate(-50%, -50%) rotate(var(--r, 0deg)) translateY(0); }
  50% { transform: translate(-50%, -50%) rotate(var(--r, 0deg)) translateY(-.9cqw); }
}
.kv3-art .oc .cta { position: absolute; right: 1.2cqw; bottom: -1.5cqw; display: inline-flex; align-items: center; gap: .5cqw; padding: .55cqw 1.1cqw; border-radius: 999px;
  font-size: 1.05cqw; font-weight: 700; color: #fff; white-space: nowrap; background: linear-gradient(135deg, #3b82f6, #1d4ed8); box-shadow: 0 .8cqw 1.6cqw -.8cqw rgba(29, 78, 216, .9);
  opacity: 0; transform: translateY(.6cqw); transition: opacity .2s ease, transform .2s ease; pointer-events: none; }
.kv3-green .kv3-art .oc .cta { background: linear-gradient(135deg, #22c55e, #15803d); }
.kv3-art a.oc:hover .cta, .kv3-art a.oc:focus-visible .cta { opacity: 1; transform: none; }
.kv3-art .oc.prog .ring { animation: kv3ring 1.3s cubic-bezier(.22, 1, .36, 1) .2s both; }
@keyframes kv3ring { from { --p: 0; } }
.kv3-art .oc .tile { transition: transform .3s cubic-bezier(.34, 1.56, .64, 1); }
.kv3-art a.oc:hover .tile { transform: rotate(-8deg) scale(1.08); }
@media (hover: none) {
  .kv3-feats .kv3-ix .more { max-height: 40px; opacity: 1; margin-top: 8px; }
}
@media (prefers-reduced-motion: reduce) {
  .kv3-art a.oc, .kv3-art .oc.prog .ring { animation: none; }
  .kv3-ix, .kv3-ix:hover { transform: none; }
}
html[data-theme="dark"] .kv3-ix:hover { background: color-mix(in srgb, var(--chip) 92%, var(--a1)); }