/* ==========================================================================
   Learn With Coffee — Theme
   Cool tech (ice blue / sky) meets warm coffee (deep brown / latte / cream).
   Signature element: the "Brew Meter" — progress rendered as a filling cup
   with rising steam, used for course/lesson progress and the hero moment.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,500;0,9..144,600;0,9..144,700;1,9..144,500&family=Inter:wght@400;500;600;700;800&family=IBM+Plex+Mono:wght@500;600&family=Hind+Siliguri:wght@400;500;600;700&display=swap');

:root{
  /* -- Cool / tech side -- */
  --ice:        #EAF6FB;
  --ice-deep:   #D7EEF7;
  --sky:        #6FB8DE;
  --sky-deep:   #2E7EA8;

  /* -- Warm / coffee side -- */
  --coffee:      #3C2415;
  --coffee-mid:  #6B4226;
  --coffee-soft: #8A5A3C;
  --latte:       #C9A87C;
  --latte-soft:  #E7D3B0;
  --cream:       #FBF6EE;

  /* -- Ink / neutrals -- */
  --ink:        #241A12;
  --ink-soft:   #6B5C4F;
  --line:       #E4DACB;
  --line-cool:  #CFE6F0;
  --white:      #FFFFFF;

  /* -- Status -- */
  --good:   #2E8B57;
  --warn:   #B8860B;
  --bad:    #B23A2E;

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-card: 0 1px 2px rgba(60,36,21,.06), 0 8px 24px -12px rgba(60,36,21,.18);
  --shadow-pop:  0 20px 60px -20px rgba(60,36,21,.35);

  --font-display: 'Fraunces', 'Hind Siliguri', serif;
  --font-body: 'Inter', 'Hind Siliguri', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  font-family: var(--font-body);
  background: var(--ice);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}
:lang(bn){ font-family: 'Hind Siliguri', var(--font-body); }

::selection{ background: var(--latte-soft); color: var(--coffee); }

:focus-visible{
  outline: 2.5px solid var(--sky-deep);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce){
  *{ animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

/* ---------------- Typography ---------------- */
.font-display{ font-family: var(--font-display); }
.font-mono{ font-family: var(--font-mono); letter-spacing: .02em; }

.eyebrow{
  font-family: var(--font-mono);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--sky-deep);
}
.eyebrow.warm{ color: var(--coffee-soft); }

.h-display{
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--coffee);
  line-height: 1.06;
  letter-spacing: -0.01em;
}

/* ---------------- Texture ---------------- */
.grain-ice{
  background-image:
    radial-gradient(circle at 15% 20%, rgba(111,184,222,.14), transparent 40%),
    radial-gradient(circle at 85% 0%, rgba(201,168,124,.16), transparent 45%);
}

.steam-divider{
  height: 64px;
  width: 100%;
  display:block;
}

/* ---------------- Buttons ---------------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:.5rem;
  font-weight:600; font-size:.925rem; line-height:1;
  padding:.85rem 1.4rem; border-radius: 999px;
  transition: transform .15s ease, box-shadow .15s ease, background-color .15s ease, color .15s ease;
  cursor:pointer; border: 1.5px solid transparent; white-space:nowrap;
}
.btn:active{ transform: translateY(1px) scale(.99); }
.btn-brew{
  background: var(--coffee);
  color: var(--cream);
  box-shadow: 0 10px 24px -10px rgba(60,36,21,.55);
}
.btn-brew:hover{ background: #2c1a0f; box-shadow: 0 14px 30px -10px rgba(60,36,21,.6); }
.btn-sky{
  background: var(--sky-deep);
  color: var(--white);
  box-shadow: 0 10px 24px -10px rgba(46,126,168,.5);
}
.btn-sky:hover{ background:#256d92; }
.btn-outline{
  background: transparent;
  border-color: var(--coffee);
  color: var(--coffee);
}
.btn-outline:hover{ background: var(--coffee); color: var(--cream); }
.btn-ghost-ice{
  background: rgba(255,255,255,.6);
  border-color: var(--line-cool);
  color: var(--coffee);
}
.btn-ghost-ice:hover{ background: var(--white); border-color: var(--sky); }
.btn-sm{ padding:.5rem .9rem; font-size:.8rem; }
.btn-danger{ background: var(--bad); color:#fff; }
.btn-danger:hover{ background:#95291f; }
.btn:disabled{ opacity:.5; cursor:not-allowed; transform:none; }

/* ---------------- Cards / surfaces ---------------- */
.card{
  background: var(--white);
  border: 1px solid var(--line-cool);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
}
.card-cream{
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}
.glass{
  background: rgba(255,255,255,.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border: 1px solid rgba(255,255,255,.6);
}
.nav-glass{
  background: rgba(234,246,251,.78);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--line-cool);
}

/* ---------------- Badges / tags ---------------- */
.tag{
  display:inline-flex; align-items:center; gap:.35rem;
  font-family: var(--font-mono); font-size:.68rem; font-weight:600;
  letter-spacing:.06em; text-transform:uppercase;
  padding:.3rem .6rem; border-radius:999px;
}
.tag-trial{ background:#DFF3E4; color:var(--good); }
.tag-locked{ background:#F2EADC; color:var(--coffee-mid); }
.tag-live{ background:#FCE3DE; color:#B23A2E; }
.tag-new{ background:var(--ice-deep); color:var(--sky-deep); }
.tag-pending{ background:#FBEFD1; color:var(--warn); }

/* ---------------- Brew Meter (signature progress element) ---------------- */
.brew-meter{ position:relative; width:100%; }
.brew-cup{
  --fill: 0%;
  position:relative;
  height: 14px;
  border-radius: 999px;
  background: var(--latte-soft);
  overflow:hidden;
  border: 1px solid var(--line);
}
.brew-cup::after{
  content:"";
  position:absolute; inset:0 auto 0 0;
  width: var(--fill);
  background: linear-gradient(90deg, var(--coffee-mid), var(--coffee));
  border-radius: 999px;
  transition: width .6s cubic-bezier(.22,.9,.3,1);
}
.brew-meter-label{
  display:flex; justify-content:space-between; align-items:baseline;
  font-family: var(--font-mono); font-size:.72rem; color: var(--ink-soft);
  margin-bottom:.4rem;
}

.brew-ring{ position:relative; display:inline-grid; place-items:center; }
.brew-ring svg{ transform: rotate(-90deg); }
.brew-ring circle{ fill:none; stroke-linecap:round; }
.brew-ring .track{ stroke: var(--latte-soft); }
.brew-ring .fill{ stroke: var(--coffee); transition: stroke-dashoffset .8s cubic-bezier(.22,.9,.3,1); }
.brew-ring .pct{
  position:absolute; font-family: var(--font-mono); font-weight:600; color:var(--coffee); font-size:.9rem;
}

/* ---------------- Lesson list / anti-skip lock ---------------- */
.lesson-row{
  display:flex; align-items:center; gap:.9rem;
  padding:.85rem 1rem; border-radius: var(--radius-sm);
  border:1px solid var(--line-cool); background:var(--white);
  transition: border-color .15s ease, background .15s ease;
}
.lesson-row.active{ border-color: var(--sky); background: var(--ice-deep); }
.lesson-row.locked{ opacity:.55; }
.lesson-row.done .lesson-index{ background: var(--good); color:#fff; border-color:var(--good); }
.lesson-index{
  width:30px; height:30px; border-radius:50%;
  display:grid; place-items:center; flex-shrink:0;
  border:1.5px solid var(--line); font-family: var(--font-mono); font-size:.75rem; font-weight:600;
  color: var(--ink-soft); background: var(--cream);
}

/* ---------------- Forms ---------------- */
.field-label{ font-size:.8rem; font-weight:600; color: var(--coffee-mid); margin-bottom:.35rem; display:block; }
.input, select.input, textarea.input{
  width:100%; padding:.75rem .95rem; border-radius: var(--radius-sm);
  border: 1.5px solid var(--line-cool); background: var(--white);
  font-size:.925rem; color: var(--ink); transition: border-color .15s ease, box-shadow .15s ease;
}
.input:focus{ border-color: var(--sky-deep); box-shadow: 0 0 0 3px rgba(46,126,168,.15); outline:none; }
.input::placeholder{ color:#9C8E80; }

/* ---------------- Table (admin) ---------------- */
.admin-table{ width:100%; border-collapse: separate; border-spacing:0; font-size:.875rem; }
.admin-table th{
  text-align:left; font-family: var(--font-mono); font-size:.68rem; letter-spacing:.08em; text-transform:uppercase;
  color: var(--ink-soft); padding:.7rem .9rem; border-bottom:1.5px solid var(--line-cool);
}
.admin-table td{ padding:.75rem .9rem; border-bottom:1px solid var(--line-cool); vertical-align:middle; }
.admin-table tr:hover td{ background: var(--ice); }

/* ---------------- Misc ---------------- */
.skeleton{ background: linear-gradient(90deg, var(--line-cool) 25%, var(--ice-deep) 37%, var(--line-cool) 63%); background-size:400% 100%; animation: shimmer 1.4s ease infinite; border-radius: var(--radius-sm); }
@keyframes shimmer{ 0%{background-position:100% 50%} 100%{background-position:0 50%} }

.toast{
  position:fixed; bottom:1.25rem; left:50%; transform:translateX(-50%) translateY(8px);
  background: var(--coffee); color: var(--cream); padding:.8rem 1.3rem; border-radius: 999px;
  font-size:.875rem; font-weight:500; box-shadow: var(--shadow-pop); z-index:200;
  opacity:0; pointer-events:none; transition: opacity .2s ease, transform .2s ease;
}
.toast.show{ opacity:1; transform:translateX(-50%) translateY(0); pointer-events:auto; }
.toast.err{ background: var(--bad); }
.toast.ok{ background: var(--good); }

.modal-backdrop{
  position:fixed; inset:0; background: rgba(36,26,18,.45); backdrop-filter: blur(3px);
  display:flex; align-items:center; justify-content:center; z-index:150; padding:1rem;
}

.scrollbar-slim::-webkit-scrollbar{ width:8px; height:8px; }
.scrollbar-slim::-webkit-scrollbar-thumb{ background: var(--latte); border-radius:999px; }
.scrollbar-slim::-webkit-scrollbar-track{ background: transparent; }

/* ---------------- Video watermark (anti-piracy) ---------------- */
.video-watermark{
  position:absolute;
  pointer-events:none;
  z-index:20;
  font-family: var(--font-mono);
  font-size:.72rem;
  font-weight:600;
  letter-spacing:.03em;
  color: rgba(255,255,255,.55);
  text-shadow: 0 1px 3px rgba(0,0,0,.65);
  padding:.25rem .5rem;
  white-space:nowrap;
  transition: top 1.2s ease, left 1.2s ease;
  user-select:none;
}

.steam-loop{ animation: steamRise 3.6s ease-in-out infinite; transform-origin: bottom center; }
.steam-loop.d2{ animation-delay: .6s; }
.steam-loop.d3{ animation-delay: 1.2s; }
@keyframes steamRise{
  0%{ opacity:0; transform: translateY(0) scaleX(1); }
  25%{ opacity:.6; }
  70%{ opacity:.25; }
  100%{ opacity:0; transform: translateY(-26px) scaleX(1.4); }
}