/* =====================================================
   Kinva — Design System
   Original code © Kinva (kinniva.com). All rights reserved.
   "Aurora" theme — bright, premium, gradient-rich, joyful.
   ===================================================== */

/* Unified brand wordmark "Kinva" (Inter) — identical header brand on every page */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@600;700;800&display=swap');
.brand,.brand-glow,.k-brand,.k-logo .k-logo-name{font-family:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif!important;font-weight:800!important;letter-spacing:0!important;background:linear-gradient(100deg,#7C3AED 0%,#6C4CF1 18%,#EC4899 42%,#BFEBFF 58%,#25B6F2 74%,#7C3AED 100%)!important;background-size:320% 100%!important;-webkit-background-clip:text!important;background-clip:text!important;-webkit-text-fill-color:transparent!important;color:transparent!important;filter:drop-shadow(0 0 7px rgba(124,58,237,.48))!important;animation:kinvaBrandFlow 4.5s linear infinite,kinvaBrandGlow 2.7s ease-in-out infinite alternate!important}
@keyframes kinvaBrandFlow{to{background-position:-320% 0}}
@keyframes kinvaBrandGlow{from{filter:drop-shadow(0 0 2px rgba(124,58,237,.22)) drop-shadow(0 0 5px rgba(37,182,242,.15))}to{filter:drop-shadow(0 0 11px rgba(124,58,237,.78)) drop-shadow(0 0 17px rgba(37,182,242,.62)) drop-shadow(0 0 20px rgba(236,72,153,.36))}}
/* plain header icons (no box/border) like Quvir — desktop; mobile handled per-page */
@media(min-width:721px){
  .ico,.icon-btn,.k-hicon{background:transparent!important;border:none!important;box-shadow:none!important}
  .ico:hover,.icon-btn:hover,.k-hicon:hover{background:rgba(127,127,127,.14)!important}
}

:root {
  /* Brand palette — Aurora identity */
  --k-primary: #6C4CF1;
  --k-primary-dark: #5333D6;
  --k-primary-soft: #ECEAFE;
  --k-violet: #8B5CF6;
  --k-fuchsia: #EC4899;
  --k-sky: #25B6F2;
  --k-sky-soft: #E3F6FE;
  --k-coral: #FF6B6B;
  --k-coral-soft: #FFEDED;
  --k-yellow: #FFC93C;
  --k-yellow-soft: #FFF6DB;
  --k-green: #22C55E;
  --k-green-soft: #E6FAEF;
  --k-red: #EF4565;
  --k-red-soft: #FDE9EE;
  --k-pink: #EC4899;

  /* Surfaces & text */
  --k-bg: #F5F4FF;
  --k-surface: #FFFFFF;
  --k-border: #E9E6F7;
  --k-text: #1B1B33;
  --k-text-soft: #585774;
  --k-text-faint: #9794B2;

  /* Signature gradients */
  --k-grad: linear-gradient(120deg, var(--k-violet), var(--k-primary) 48%, var(--k-sky));
  --k-grad-aurora: linear-gradient(125deg, #8B5CF6 0%, #6C4CF1 26%, #EC4899 60%, #25B6F2 100%);
  --k-grad-warm: linear-gradient(120deg, var(--k-coral), var(--k-yellow));
  --k-grad-text: linear-gradient(100deg, var(--k-violet), var(--k-primary) 50%, var(--k-sky));

  /* Shape & shadow */
  --k-radius: 18px;
  --k-radius-lg: 26px;
  --k-radius-pill: 999px;
  --k-shadow-sm: 0 1px 3px rgba(33, 23, 84, 0.06);
  --k-shadow: 0 8px 30px rgba(108, 76, 241, 0.12);
  --k-shadow-lg: 0 18px 50px rgba(108, 76, 241, 0.20);
  --k-shadow-color: 0 16px 40px -18px rgba(108, 76, 241, 0.55);
  --k-glow: 0 0 0 1px rgba(108, 76, 241, .14), 0 10px 30px rgba(108, 76, 241, .28);

  /* Motion */
  --k-ease: cubic-bezier(0.34, 1.56, 0.64, 1); /* playful overshoot */
  --k-ease-smooth: cubic-bezier(0.22, 1, 0.36, 1);
  --k-fast: 150ms;
  --k-med: 280ms;

  --k-font: "Nunito", "Baloo Bhaijaan 2", "Segoe UI", Tahoma, sans-serif;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--k-font);
  background: var(--k-bg);
  background-image:
    radial-gradient(38vw 38vw at 8% -6%, rgba(139, 92, 246, 0.16), transparent 60%),
    radial-gradient(42vw 42vw at 102% 4%, rgba(37, 182, 242, 0.14), transparent 60%),
    radial-gradient(46vw 46vw at 88% 102%, rgba(236, 72, 153, 0.12), transparent 62%),
    radial-gradient(40vw 40vw at 4% 96%, rgba(108, 76, 241, 0.10), transparent 60%);
  background-attachment: fixed;
  color: var(--k-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* RTL support (Arabic and other RTL languages) */
[dir="rtl"] body { letter-spacing: 0; }

h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 0.5em; font-weight: 800; }
p { margin: 0 0 1em; }
a { color: var(--k-primary); text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; }

/* selection + scrollbar polish */
::selection { background: rgba(108, 76, 241, 0.18); color: var(--k-text); }
* { scrollbar-width: thin; scrollbar-color: rgba(108, 76, 241, 0.45) transparent; }
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  border-radius: 10px;
  border: 3px solid transparent;
  background-clip: padding-box;
  background-color: rgba(108, 76, 241, 0.40);
}
::-webkit-scrollbar-thumb:hover { background-color: rgba(108, 76, 241, 0.62); }

/* ---------- Decorative background blobs ---------- */
.k-blobs {
  position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none;
}
.k-blobs::before, .k-blobs::after {
  content: ""; position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.42;
  will-change: transform;
}
.k-blobs::before {
  width: 520px; height: 520px; top: -180px; right: -120px;
  background: radial-gradient(circle at 35% 35%, var(--k-violet), var(--k-fuchsia) 55%, transparent 72%);
  animation: k-blob-a 24s ease-in-out infinite alternate, k-blob-breathe 8s ease-in-out infinite;
}
.k-blobs::after {
  width: 460px; height: 460px; bottom: -150px; left: -120px;
  background: radial-gradient(circle at 55% 45%, var(--k-sky), var(--k-primary) 60%, transparent 74%);
  animation: k-blob-b 30s ease-in-out infinite alternate, k-blob-breathe 10s ease-in-out infinite 1.2s;
}
@keyframes k-blob-a { from { transform: translate3d(0,0,0) scale(1); } to { transform: translate3d(46px,40px,0) scale(1.16); } }
@keyframes k-blob-b { from { transform: translate3d(0,0,0) scale(1.1); } to { transform: translate3d(-40px,-30px,0) scale(.92); } }
/* slow "breathing" — the glow swells and fades behind the page */
@keyframes k-blob-breathe { 0%, 100% { opacity: .3; } 50% { opacity: .58; } }

/* ---------- Buttons ---------- */
.k-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border: none; border-radius: var(--k-radius-pill);
  font-size: 1rem; font-weight: 800; cursor: pointer;
  transition: transform var(--k-fast) var(--k-ease), box-shadow var(--k-fast), filter var(--k-fast);
  user-select: none;
}
.k-btn:active { transform: scale(0.94); }
.k-btn:focus-visible { outline: 3px solid var(--k-sky); outline-offset: 2px; }

.k-btn-primary {
  color: #fff;
  background: linear-gradient(120deg, var(--k-violet), var(--k-primary) 42%, var(--k-fuchsia) 78%, var(--k-sky) 120%);
  background-size: 180% 100%;
  background-position: 0% 50%;
  box-shadow: 0 8px 22px -6px rgba(108, 76, 241, 0.55);
  transition: transform var(--k-fast) var(--k-ease), box-shadow var(--k-med), background-position var(--k-med) ease;
}
.k-btn-primary:hover { transform: translateY(-2px); background-position: 100% 50%; box-shadow: 0 14px 30px -8px rgba(108, 76, 241, 0.62); }

.k-btn-secondary {
  color: var(--k-primary); background: var(--k-primary-soft);
  box-shadow: inset 0 0 0 1px rgba(108, 76, 241, 0.10);
}
.k-btn-secondary:hover { filter: brightness(0.98); transform: translateY(-1px); box-shadow: inset 0 0 0 1px rgba(108, 76, 241, 0.22); }

.k-btn-coral { color: #fff; background: linear-gradient(120deg, #FF9472, var(--k-coral) 60%, var(--k-fuchsia)); box-shadow: 0 8px 22px -6px rgba(255, 107, 107, 0.5); }
.k-btn-green { color: #fff; background: linear-gradient(120deg, #34D399, var(--k-green)); box-shadow: 0 8px 22px -6px rgba(34, 197, 94, 0.45); }
.k-btn-ghost { background: transparent; color: var(--k-text-soft); }
.k-btn-ghost:hover { background: var(--k-primary-soft); color: var(--k-primary); }

.k-btn:disabled { opacity: 0.55; cursor: not-allowed; transform: none !important; }



/* ---------- Cards ---------- */
.k-card {
  position: relative;
  background: var(--k-surface);
  border: 1px solid var(--k-border);
  border-radius: var(--k-radius-lg);
  box-shadow: var(--k-shadow-sm);
  padding: 24px;
  transition: transform var(--k-med) var(--k-ease), box-shadow var(--k-med), border-color var(--k-med);
}
.k-card-hover { cursor: pointer; }
.k-card-hover:hover { transform: translateY(-4px); box-shadow: var(--k-shadow); border-color: rgba(108, 76, 241, 0.22); }

/* reusable gradient shine sweep for any overflow-hidden media block */
.k-shine { position: relative; overflow: hidden; }
.k-shine::after {
  content: ""; position: absolute; inset: 0; z-index: 2; pointer-events: none;
  background: linear-gradient(105deg, transparent 38%, rgba(255,255,255,.42) 50%, transparent 62%);
  transform: translateX(-140%); transition: transform .7s var(--k-ease-smooth);
}
.k-shine:hover::after { transform: translateX(140%); }

/* ---------- Chips / badges ---------- */
.k-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 14px; border-radius: var(--k-radius-pill);
  font-size: 0.82rem; font-weight: 800;
}
.k-chip-primary { background: var(--k-primary-soft); color: var(--k-primary); }
.k-chip-green { background: var(--k-green-soft); color: #15803D; }
.k-chip-yellow { background: var(--k-yellow-soft); color: #B45309; }
.k-chip-coral { background: var(--k-coral-soft); color: #C2410C; }
.k-chip-sky { background: var(--k-sky-soft); color: #0369A1; }
.post-info > .k-chip,
.inside > .k-chip {
  font-size: .72rem;
  line-height: 1.05;
  padding: 4px 11px;
  margin: -5px 0 12px;
}

/* ---------- Inputs ---------- */
.k-input {
  width: 100%; padding: 13px 18px;
  border: 2px solid var(--k-border); border-radius: var(--k-radius);
  font-family: inherit; font-size: 1rem; color: var(--k-text);
  background: var(--k-surface);
  transition: border-color var(--k-fast), box-shadow var(--k-fast);
}
.k-input:focus {
  outline: none; border-color: var(--k-primary);
  box-shadow: 0 0 0 4px rgba(108, 76, 241, 0.16);
}
.k-input.k-input-error { border-color: var(--k-red); box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.12); }


.k-label { display: block; font-weight: 800; font-size: 0.9rem; margin-bottom: 6px; color: var(--k-text-soft); }

/* ---------- Header ---------- */
.k-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 14px;
  padding: 12px clamp(16px, 4vw, 40px);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(160%) blur(16px);
  -webkit-backdrop-filter: saturate(160%) blur(16px);
  border-bottom: 1px solid var(--k-border);
}
.k-header::after {
  content: ""; position: absolute; inset-inline: 0; bottom: -1px; height: 2px;
  background: var(--k-grad-aurora); opacity: .85;
}
.k-logo { display: flex; align-items: center; gap: 10px; font-weight: 900; font-size: 1.35rem; color: var(--k-text); position: relative; }
.k-logo img, .k-logo svg { width: 38px; height: 38px; filter: drop-shadow(0 4px 10px rgba(108,76,241,.32)); }
.k-logo .k-logo-name {
  background: linear-gradient(100deg, #7C3AED 0%, #6C4CF1 20%, #C9A8FF 34%, #EC4899 50%, #BFEBFF 64%, #25B6F2 80%, #7C3AED 100%);
  background-size: 250% 100%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  animation: k-brand-flow 3.4s linear infinite, k-brand-glow 2.6s ease-in-out infinite alternate;
}
@keyframes k-brand-flow { to { background-position: 250% 50%; } }
@keyframes k-brand-glow {
  from { filter: drop-shadow(0 0 2px rgba(108,76,241,.25)); }
  to   { filter: drop-shadow(0 0 14px rgba(236,72,153,.7)); }
}

/* ---------- Animations ---------- */
@keyframes k-pop-in {
  0% { opacity: 0; transform: scale(0.85) translateY(12px); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}
@keyframes k-fade-up {
  0% { opacity: 0; transform: translateY(18px); }
  100% { opacity: 1; transform: translateY(0); }
}
@keyframes k-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
@keyframes k-shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-7px); }
  40%, 80% { transform: translateX(7px); }
}
@keyframes k-pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(108, 76, 241, 0.45); }
  100% { box-shadow: 0 0 0 18px rgba(108, 76, 241, 0); }
}
@keyframes k-shimmer { to { background-position: 200% 0; } }
@keyframes k-float-soft { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
@keyframes k-enter { from { opacity: 0; transform: translateY(36px) scale(.95); } to { opacity: 1; transform: none; } }
@keyframes k-icon-bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-3.5px); } }
@keyframes k-icon-pop { 0% { opacity: 0; transform: scale(.4) translateY(-6px); } 60% { transform: scale(1.18); } 100% { opacity: 1; transform: scale(1); } }

/* gradient text helper */
.k-grad-text {
  background: var(--k-grad-text); -webkit-background-clip: text; background-clip: text; color: transparent;
}
@keyframes k-confetti-fall {
  0% { transform: translateY(-10px) rotate(0deg); opacity: 1; }
  100% { transform: translateY(90vh) rotate(720deg); opacity: 0; }
}

.k-pop-in { animation: k-pop-in var(--k-med) var(--k-ease) both; }
.k-fade-up { animation: k-fade-up 420ms ease both; }
.k-shake { animation: k-shake 380ms ease; }
.k-speaking { animation: k-pulse-ring 1.1s ease-out infinite; }


/* Staggered children entrance */
.k-stagger > * { animation: k-fade-up 420ms ease both; }
.k-stagger > *:nth-child(1) { animation-delay: 40ms; }
.k-stagger > *:nth-child(2) { animation-delay: 110ms; }
.k-stagger > *:nth-child(3) { animation-delay: 180ms; }
.k-stagger > *:nth-child(4) { animation-delay: 250ms; }
.k-stagger > *:nth-child(5) { animation-delay: 320ms; }
.k-stagger > *:nth-child(6) { animation-delay: 390ms; }

/* Confetti pieces (created by JS on success) */
.k-confetti {
  position: fixed; top: 0; width: 10px; height: 14px; z-index: 999;
  border-radius: 3px; pointer-events: none;
  animation: k-confetti-fall 1.6s ease-in forwards;
}

/* Respect users who prefer less motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ---------- Toasts ---------- */
.k-toast-wrap {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; gap: 10px; z-index: 200; width: min(92vw, 420px);
}
.k-toast {
  display: flex; align-items: center; gap: 10px;
  background: var(--k-text); color: #fff; font-weight: 700;
  padding: 13px 20px; border-radius: var(--k-radius);
  box-shadow: var(--k-shadow-lg);
  animation: k-pop-in var(--k-med) var(--k-ease) both;
}
.k-toast-success { background: linear-gradient(135deg, #16A34A, var(--k-green)); }
.k-toast-error { background: linear-gradient(135deg, #DC2626, var(--k-red)); }

/* ---------- Modal ---------- */
.k-modal-backdrop {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(30, 34, 53, 0.45); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center; padding: 18px;
}
.k-modal {
  background: var(--k-surface); border-radius: var(--k-radius-lg);
  box-shadow: var(--k-shadow-lg); width: min(94vw, 480px);
  max-height: 88vh; overflow-y: auto; padding: 28px;
  animation: k-pop-in var(--k-med) var(--k-ease) both;
}


/* ---------- Utility ---------- */
.k-container { width: min(1120px, 100% - 32px); margin-inline: auto; }
.k-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.k-grid { display: grid; gap: 18px; }
.k-muted { color: var(--k-text-soft); }
.k-faint { color: var(--k-text-faint); font-size: 0.85rem; }
.k-hidden { display: none !important; }

@media (max-width: 640px) {
  .k-btn { padding: 11px 20px; }
  .k-card { padding: 18px; border-radius: var(--k-radius); }
}

/* modal close (X) button + back-button closes modal */
.k-modal { position: relative; }
.k-modal-x { position: absolute; top: 8px; inset-inline-end: 8px; z-index: 3; width: 36px; height: 36px; border: none; border-radius: 50%; background: var(--k-bg); color: var(--k-text-soft); font-size: 1.05rem; line-height: 1; cursor: pointer; display: flex; align-items: center; justify-content: center; }
.k-modal-x:hover { background: var(--k-border); color: var(--k-text); }

/* ===== CEFR level badge + level filter bar (shared) ===== */
.k-lvl { display: inline-flex; align-items: center; justify-content: center; min-width: 30px; padding: 2px 8px; border-radius: 999px; font-size: 11.5px; font-weight: 800; color: #fff; line-height: 1.5; letter-spacing: .3px; }
.k-lvl-pre { vertical-align: middle; margin-inline-start: 8px; }
.k-levelbar { display: flex; gap: 8px; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; padding: 2px 0 12px; margin: 0 0 4px; }
.k-levelbar::-webkit-scrollbar { display: none; }
.k-lvlbtn { flex: 0 0 auto; border: 1px solid var(--k-border); background: var(--k-surface); color: var(--k-text-soft); border-radius: 999px; padding: 7px 16px; font-weight: 800; font-size: .9rem; font-family: inherit; cursor: pointer; white-space: nowrap; transition: background .2s, color .2s, border-color .2s; }
.k-lvlbtn:hover { border-color: var(--k-primary); color: var(--k-primary); }
.k-lvlbtn.active { background: var(--k-primary); border-color: var(--k-primary); color: #fff; }