/* ══════════════════════════════════════════════════════════════
   SynDex Brand System — "Ink & Ion"
   Shared colour tokens + tactile 3D primitives for every surface:
   public site (dark), app pages (light), free + staff portals (dark).
   Load this BEFORE a page's own stylesheet so the page can override.
   ══════════════════════════════════════════════════════════════ */

:root {
  /* ── Brand constants (identical on every surface) ───────────── */
  --syn-primary:       #2f6bff;
  --syn-primary-lit:   #5d8dff;
  --syn-primary-deep:  #1d4fd8;
  --syn-primary-edge:  #1740b8;   /* thickness of the extruded body */
  --syn-primary-glow:  rgba(38, 94, 214, 0.55);
  --syn-primary-soft:  rgba(47, 107, 255, 0.14);

  --syn-ion:           #35c8f0;   /* secondary accent */
  --syn-ion-deep:      #0d8cbd;
  --syn-ion-edge:      #0a7ba0;
  --syn-ion-glow:      rgba(28, 152, 205, 0.45);

  --syn-live:          #12b981;
  --syn-live-deep:     #0a7f5b;
  --syn-live-edge:     #086a4c;
  --syn-live-glow:     rgba(18, 185, 129, 0.4);

  --syn-warn:          #f0a02a;
  --syn-warn-deep:     #b06f0d;
  --syn-warn-edge:     #8f5808;

  --syn-hot:           #ff4d6d;
  --syn-hot-deep:      #c92a4a;
  --syn-hot-edge:      #a51f3c;

  /* ── Geometry & motion ──────────────────────────────────────── */
  --syn-r-sm:  10px;
  --syn-r-md:  14px;
  --syn-r-lg:  20px;
  --syn-r-xl:  26px;
  --syn-ease:  cubic-bezier(.2, .8, .2, 1);
  --syn-ease-out: cubic-bezier(.16, 1, .3, 1);

  /* ── Default surface = dark ─────────────────────────────────── */
  --syn-bg:        #070a11;
  --syn-bg-2:      #0b0f19;
  --syn-surface:   #101623;
  --syn-surface-2: #151d2c;
  --syn-raised:    #1a2436;
  --syn-line:      #212c41;
  --syn-line-2:    #2c3a55;
  --syn-text:      #e8eef8;
  --syn-text-2:    #9aa7bd;
  --syn-text-3:    #6c7a92;
  --syn-shadow-1:  rgba(0, 0, 0, 0.35);
  --syn-shadow-2:  rgba(0, 0, 0, 0.55);
  --syn-rim:       rgba(255, 255, 255, 0.07);
  --syn-lip:       #080d17;   /* thickness of a neutral dark slab */
  --syn-contact:   rgba(4, 10, 24, 0.5);

  /* Bengali fallbacks matter: ৳ and মেয়াদ are not in Jakarta/Space Mono */
  --syn-font: 'Plus Jakarta Sans', system-ui, -apple-system, 'Segoe UI', 'Nirmala UI', 'Noto Sans Bengali', 'Shonar Bangla', sans-serif;
  --syn-mono: 'Space Mono', ui-monospace, SFMono-Regular, Menlo, 'Nirmala UI', 'Noto Sans Bengali', monospace;
}

/* ── Light app surfaces (login, client area, panel) ───────────── */
.syn-light,
html.syn-light body {
  --syn-bg:        #eaeff7;
  --syn-bg-2:      #f2f5fa;
  --syn-surface:   #ffffff;
  --syn-surface-2: #f7f9fd;
  --syn-raised:    #ffffff;
  --syn-line:      #d3dcea;
  --syn-line-2:    #b7c6dd;
  --syn-text:      #10151f;
  --syn-text-2:    #55627a;
  --syn-text-3:    #8494ad;
  --syn-shadow-1:  rgba(20, 34, 64, 0.08);
  --syn-shadow-2:  rgba(20, 34, 64, 0.16);
  --syn-rim:       rgba(255, 255, 255, 0.9);
  --syn-lip:       #c2d0e2;
  --syn-contact:   rgba(20, 34, 64, 0.30);
}


/* ══════════════════════════════════════════════════════════════
   ATMOSPHERE — shared page background
   ══════════════════════════════════════════════════════════════ */

.syn-stage-dark {
  background-color: var(--syn-bg);
  background-image:
    radial-gradient(900px 520px at 12% -8%,  rgba(47, 107, 255, 0.16), transparent 62%),
    radial-gradient(760px 460px at 92% 4%,   rgba(53, 200, 240, 0.10), transparent 60%),
    radial-gradient(680px 620px at 50% 108%, rgba(47, 107, 255, 0.09), transparent 65%),
    linear-gradient(180deg, #070a11 0%, #080c15 40%, #060910 100%);
  background-attachment: fixed;
}

.syn-stage-light {
  background-color: var(--syn-bg);
  background-image:
    radial-gradient(880px 500px at 50% -10%, rgba(47, 107, 255, 0.11), transparent 68%),
    radial-gradient(circle at 1px 1px, rgba(47, 107, 255, 0.14) 1px, transparent 0);
  background-size: 100% 100%, 30px 30px;
  background-attachment: fixed;
}


/* ══════════════════════════════════════════════════════════════
   3D BUTTONS — extruded, rim-lit, pressable
   ══════════════════════════════════════════════════════════════ */

.syn-btn {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--syn-font);
  font-weight: 700;
  font-size: 0.9rem;
  line-height: 1;
  letter-spacing: -0.005em;
  padding: 13px 24px;
  border-radius: var(--syn-r-md);
  cursor: pointer;
  overflow: hidden;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-appearance: none;
  appearance: none;

  /* colour slots, overridden per variant */
  --_face: linear-gradient(180deg, var(--syn-primary-lit) 0%, var(--syn-primary) 46%, var(--syn-primary-deep) 100%);
  --_fg:   #ffffff;
  --_bd:   var(--syn-primary-deep);
  --_edge: var(--syn-primary-edge);
  --_glow: var(--syn-primary-glow);

  background: var(--_face);
  color: var(--_fg);
  border: 1px solid var(--_bd);
  border-bottom-width: 1px;
  box-shadow:
    0 2.5px 0 var(--_edge),                                        /* thickness of the body */
    0 7.5px 12px -5px var(--syn-contact, rgba(4, 10, 24, 0.5)),    /* contact shadow */
    0 14px 26px -10px var(--_glow),                                /* coloured ambient */
    inset 0 1px 0 rgba(255, 255, 255, 0.32),                       /* hairline rim */
    inset 0 13px 18px -15px rgba(255, 255, 255, 0.14),             /* top gloss */
    inset 0 -7px 14px -9px rgba(0, 0, 0, 0.55);                   /* underside shade */
  transition:
    transform .16s var(--syn-ease),
    box-shadow .16s var(--syn-ease),
    filter .16s var(--syn-ease);
}

/* specular sweep */
.syn-btn::after {
  content: '';
  position: absolute;
  inset: -20% -60%;
  z-index: -1;
  background: linear-gradient(105deg,
    transparent 34%, rgba(255, 255, 255, 0.26) 48%, transparent 62%);
  transform: translateX(-130%);
  pointer-events: none;
}

.syn-btn:hover {
  transform: translateY(-1px);
  filter: saturate(1.08) brightness(1.05);
  box-shadow:
    0 3.5px 0 var(--_edge),
    0 8.5px 12px -5px var(--syn-contact, rgba(4, 10, 24, 0.5)),
    0 20px 34px -12px var(--_glow),
    inset 0 1px 0 rgba(255, 255, 255, 0.32),
    inset 0 13px 18px -15px rgba(255, 255, 255, 0.14),
    inset 0 -7px 14px -9px rgba(0, 0, 0, 0.5);
}
.syn-btn:hover::after { transform: translateX(130%); transition: transform .62s var(--syn-ease-out); }

.syn-btn:active {
  transform: translateY(1px);
  box-shadow:
    0 1px 0 var(--_edge),
    0 6px 12px -5px var(--syn-contact, rgba(4, 10, 24, 0.5)),
    0 5px 12px -6px var(--_glow),
    inset 0 1px 0 rgba(255, 255, 255, 0.26),
    inset 0 4px 10px -6px rgba(0, 0, 0, 0.5);
}

.syn-btn:disabled,
.syn-btn[aria-disabled="true"] {
  opacity: .5;
  cursor: not-allowed;
  transform: none;
  filter: saturate(.5);
  box-shadow: 0 1.5px 0 var(--_edge), 0 6.5px 12px -5px var(--syn-contact, rgba(4, 10, 24, 0.5)), inset 0 1px 0 rgba(255, 255, 255, 0.18), inset 0 13px 18px -15px rgba(255, 255, 255, 0.14);
}

/* ── Variants ─────────────────────────────────────────────────── */
.syn-btn--ion  { --_face: linear-gradient(180deg, #5fd8f8 0%, var(--syn-ion) 46%, var(--syn-ion-deep) 100%);
                 --_bd: var(--syn-ion-deep); --_edge: var(--syn-ion-edge); --_glow: var(--syn-ion-glow); }
.syn-btn--live { --_face: linear-gradient(180deg, #2ddba4 0%, var(--syn-live) 46%, var(--syn-live-deep) 100%);
                 --_bd: var(--syn-live-deep); --_edge: var(--syn-live-edge); --_glow: var(--syn-live-glow); }
.syn-btn--warn { --_face: linear-gradient(180deg, #ffbc52 0%, var(--syn-warn) 46%, var(--syn-warn-deep) 100%);
                 --_bd: var(--syn-warn-deep); --_edge: var(--syn-warn-edge); --_glow: rgba(240, 160, 42, 0.42); }
.syn-btn--hot  { --_face: linear-gradient(180deg, #ff7b93 0%, var(--syn-hot) 46%, var(--syn-hot-deep) 100%);
                 --_bd: var(--syn-hot-deep); --_edge: var(--syn-hot-edge); --_glow: rgba(255, 77, 109, 0.42); }

/* Ghost = recessed slab. Reads as a different material, same depth. */
.syn-btn--ghost {
  --_face: linear-gradient(180deg, var(--syn-surface-2) 0%, var(--syn-surface) 100%);
  --_fg:   var(--syn-text);
  --_bd:   var(--syn-line);
  --_edge: var(--syn-line-2);
  --_glow: var(--syn-shadow-1);
}
.syn-btn--ghost:hover {
  --_face: linear-gradient(180deg, var(--syn-raised) 0%, var(--syn-surface-2) 100%);
  border-color: var(--syn-primary);
  color: var(--syn-primary-lit);
}
.syn-btn--ghost:hover::after { opacity: .35; }

/* Tint = soft brand wash with a coloured lip */
.syn-btn--tint {
  --_face: linear-gradient(180deg, rgba(47, 107, 255, 0.22) 0%, rgba(47, 107, 255, 0.10) 100%);
  --_fg:   var(--syn-primary-lit);
  --_bd:   rgba(47, 107, 255, 0.42);
  --_edge: rgba(47, 107, 255, 0.26);
  --_glow: rgba(47, 107, 255, 0.28);
}
.syn-light .syn-btn--tint { --_fg: var(--syn-primary-deep); }

/* ── Sizes ────────────────────────────────────────────────────── */
.syn-btn--sm  { padding: 9px 16px; font-size: 0.8rem; border-radius: var(--syn-r-sm); border-bottom-width: 1px; box-shadow: 0 1.5px 0 var(--_edge), 0 6.5px 12px -5px var(--syn-contact, rgba(4, 10, 24, 0.5)), 0 9px 18px -9px var(--_glow), inset 0 1px 0 rgba(255,255,255,.34), inset 0 13px 18px -15px rgba(255, 255, 255, 0.14); }
.syn-btn--sm:hover   { transform: translateY(-1px); box-shadow: 0 2px 0 var(--_edge), 0 7px 12px -5px var(--syn-contact, rgba(4, 10, 24, 0.5)), 0 13px 22px -10px var(--_glow), inset 0 1px 0 rgba(255, 255, 255, 0.32), inset 0 13px 18px -15px rgba(255, 255, 255, 0.14); }
.syn-btn--sm:active  { transform: translateY(1px); box-shadow: 0 1px 0 var(--_edge), 0 3px 8px -6px var(--_glow); }
.syn-btn--lg  { padding: 16px 32px; font-size: 1rem; border-radius: var(--syn-r-lg); }
.syn-btn--block { display: flex; width: 100%; }
.syn-btn--pill { border-radius: 999px; }

.syn-btn svg { flex-shrink: 0; }


/* ══════════════════════════════════════════════════════════════
   3D SURFACES — raised panels & cards
   ══════════════════════════════════════════════════════════════ */

.syn-card {
  position: relative;
  background: linear-gradient(180deg, var(--syn-surface-2) 0%, var(--syn-surface) 100%);
  border: 1px solid var(--syn-line);
  border-radius: var(--syn-r-lg);
  box-shadow:
    0 2px 3px var(--syn-shadow-1), 0 22px 44px -20px var(--syn-shadow-2), inset 0 1px 0 var(--syn-rim);
}

/* Lift-and-lean: the card turns toward the pointer's edge on hover */
.syn-card--lift { transition: transform .3s var(--syn-ease-out), box-shadow .3s var(--syn-ease-out), border-color .3s ease; }
.syn-card--lift:hover {
  transform: translateY(-6px) perspective(900px) rotateX(3deg);
  border-color: var(--syn-line-2);
  box-shadow:
    0 4px 6px var(--syn-shadow-1),
    0 34px 60px -22px var(--syn-shadow-2),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

/* Edge-lit card: thin brand light along the top seam */
.syn-card--edge::before {
  content: '';
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  border-radius: var(--syn-r-lg) var(--syn-r-lg) 0 0;
  background: linear-gradient(90deg, transparent 4%, var(--syn-primary) 34%, var(--syn-ion) 72%, transparent 96%);
  opacity: .55;
  transition: opacity .3s ease;
}
.syn-card--edge:hover::before { opacity: 1; }

/* Stack: a slab sitting on its own shadow shelf, for hero tiles */
.syn-card--stack {
  box-shadow:
    0 0 0 1px var(--syn-line), 0 7px 0 -2px var(--syn-bg-2), 0 14px 0 -4px rgba(47, 107, 255, 0.10), 0 26px 50px -18px var(--syn-shadow-2), inset 0 1px 0 var(--syn-rim);
}


/* ══════════════════════════════════════════════════════════════
   3D FIELDS — engraved inputs
   ══════════════════════════════════════════════════════════════ */

.syn-field {
  width: 100%;
  font-family: var(--syn-font);
  font-size: 0.95rem;
  color: var(--syn-text);
  background: linear-gradient(180deg, var(--syn-bg-2) 0%, var(--syn-surface) 100%);
  border: 1.5px solid var(--syn-line);
  border-top-color: var(--syn-bg-2);
  border-bottom-color: var(--syn-line-2);
  border-radius: var(--syn-r-sm);
  padding: 12px 15px;
  outline: none;
  box-shadow:
    inset 0 3px 7px rgba(0, 0, 0, 0.55), inset 0 1px 2px rgba(0, 0, 0, 0.40), 0 1px 0 var(--syn-rim);
  transition: border-color .2s ease, box-shadow .2s ease, background .2s ease;
}
.syn-field::placeholder { color: var(--syn-text-3); }
.syn-field:focus {
  border-color: var(--syn-primary);
  background: linear-gradient(180deg, var(--syn-surface) 0%, var(--syn-surface-2) 100%);
  box-shadow:
    inset 0 2px 5px rgba(0, 0, 0, 0.35),
    0 0 0 3px var(--syn-primary-soft),
    0 8px 20px -10px var(--syn-primary-glow);
}
.syn-light .syn-field {
  background: linear-gradient(180deg, #eef2f9 0%, #f8fafd 100%);
  box-shadow:
    inset 0 2px 5px rgba(20, 34, 64, 0.09), inset 0 1px 0 rgba(20, 34, 64, 0.05), 0 1px 0 #ffffff;
}
.syn-light .syn-field:focus {
  background: #ffffff;
  box-shadow:
    inset 0 1px 3px rgba(20, 34, 64, 0.06),
    0 0 0 3px var(--syn-primary-soft),
    0 8px 20px -12px var(--syn-primary-glow);
}


/* ══════════════════════════════════════════════════════════════
   PILLS, CHIPS & BADGES — small extrusions
   ══════════════════════════════════════════════════════════════ */

.syn-chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--syn-font);
  font-weight: 600;
  font-size: 0.84rem;
  line-height: 1;
  padding: 8px 17px;
  border-radius: 999px;
  cursor: pointer;
  color: var(--syn-text-2);
  background: linear-gradient(180deg, var(--syn-surface-2) 0%, var(--syn-surface) 100%);
  border: 1px solid var(--syn-line);
  border-bottom-width: 1px;
  box-shadow:
    0 1.5px 0 var(--syn-bg-2), 0 6.5px 12px -5px var(--syn-contact, rgba(4, 10, 24, 0.5)), 0 8px 16px -8px var(--syn-shadow-1), inset 0 1px 0 var(--syn-rim);
  transition: transform .16s var(--syn-ease), box-shadow .16s var(--syn-ease), color .16s ease, border-color .16s ease, background .16s ease;
}
.syn-chip:hover {
  color: var(--syn-text);
  border-color: var(--syn-line-2);
  transform: translateY(-1px);
  box-shadow: 0 2px 0 var(--syn-bg-2), 0 7px 12px -5px var(--syn-contact, rgba(4, 10, 24, 0.5)), 0 13px 22px -10px var(--syn-shadow-2), inset 0 1px 0 var(--syn-rim);
}
.syn-chip:active { transform: translateY(1px); box-shadow: 0 1px 0 var(--syn-bg-2), 0 3px 8px -6px var(--syn-shadow-1); }
.syn-chip[aria-pressed="true"],
.syn-chip.is-active {
  color: #fff;
  background: linear-gradient(180deg, var(--syn-primary-lit) 0%, var(--syn-primary) 52%, var(--syn-primary-deep) 100%);
  border-color: var(--syn-primary-deep);
  border-bottom-color: var(--syn-primary-edge);
  box-shadow: 0 2.5px 0 var(--syn-primary-edge), 0 7.5px 12px -5px var(--syn-contact, rgba(4, 10, 24, 0.5)), 0 10px 22px -10px var(--syn-primary-glow), inset 0 1px 0 rgba(255, 255, 255, 0.32), inset 0 13px 18px -15px rgba(255, 255, 255, 0.14);
}

/* Status dot used across live/undected tags */
.syn-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--syn-live);
  box-shadow: 0 0 0 3px rgba(18, 185, 129, 0.18), 0 0 10px rgba(18, 185, 129, 0.75);
  animation: syn-pulse 1.6s ease-in-out infinite;
}
.syn-dot--ion  { background: var(--syn-ion);  box-shadow: 0 0 0 3px rgba(53, 200, 240, 0.18), 0 0 10px rgba(53, 200, 240, 0.75); }
.syn-dot--warn { background: var(--syn-warn); box-shadow: 0 0 0 3px rgba(240, 160, 42, 0.18), 0 0 10px rgba(240, 160, 42, 0.7); }
.syn-dot--hot  { background: var(--syn-hot);  box-shadow: 0 0 0 3px rgba(255, 77, 109, 0.18), 0 0 10px rgba(255, 77, 109, 0.7); }

@keyframes syn-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: .45; transform: scale(.82); }
}

/* Badge = flat translucent label, but with a lit rim so it sits on top of media */
.syn-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 999px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 6px 16px -6px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.22);
}
.syn-badge--live { background: rgba(18, 185, 129, 0.16); color: #4ade9c; border: 1px solid rgba(18, 185, 129, 0.42); }
.syn-badge--ion  { background: rgba(53, 200, 240, 0.16); color: #7ddcf7; border: 1px solid rgba(53, 200, 240, 0.42); }
.syn-badge--hot  { background: rgba(255, 77, 109, 0.16); color: #ff8ba1; border: 1px solid rgba(255, 77, 109, 0.42); }
.syn-badge--warn { background: rgba(240, 160, 42, 0.16); color: #ffc76b; border: 1px solid rgba(240, 160, 42, 0.42); }
.syn-badge--brand{ background: rgba(47, 107, 255, 0.18); color: #9dbaff; border: 1px solid rgba(47, 107, 255, 0.44); }


/* ══════════════════════════════════════════════════════════════
   FEEDBACK BOXES, DIVIDERS, FOCUS
   ══════════════════════════════════════════════════════════════ */

.syn-note {
  padding: 12px 15px;
  border-radius: var(--syn-r-sm);
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.45;
  border: 1px solid;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 6px 16px -12px var(--syn-shadow-2);
}
.syn-note--ok    { background: rgba(18, 185, 129, 0.12); border-color: rgba(18, 185, 129, 0.34); color: #3fd39c; }
.syn-note--warn  { background: rgba(240, 160, 42, 0.12); border-color: rgba(240, 160, 42, 0.34); color: #f5b84e; }
.syn-note--error { background: rgba(255, 77, 109, 0.12); border-color: rgba(255, 77, 109, 0.34); color: #ff8098; }
.syn-light .syn-note--ok    { background: #e9faf2; border-color: #b8e8d1; color: #0a7f5b; }
.syn-light .syn-note--warn  { background: #fdf3e3; border-color: #f2dcb4; color: #96600a; }
.syn-light .syn-note--error { background: #fdecef; border-color: #f6c3ce; color: #b81f42; }

.syn-seam { height: 1px; border: 0; background: linear-gradient(90deg, transparent, var(--syn-line), transparent); }

:where(a, button, input, textarea, select, [tabindex]):focus-visible {
  outline: 2px solid var(--syn-primary-lit);
  outline-offset: 3px;
  border-radius: var(--syn-r-sm);
}

.syn-hairline { border: 1px solid var(--syn-line); }
.syn-mono { font-family: var(--syn-mono); }
.syn-ink  { color: var(--syn-text); }
.syn-mute { color: var(--syn-text-2); }


/* ══════════════════════════════════════════════════════════════
   MOTION HELPERS
   ══════════════════════════════════════════════════════════════ */

.syn-float { animation: syn-float 6s ease-in-out infinite; }
@keyframes syn-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-10px); }
}

.syn-rise { opacity: 0; transform: translateY(26px); transition: opacity .75s var(--syn-ease-out), transform .75s var(--syn-ease-out); }
.syn-rise.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .syn-btn, .syn-card, .syn-chip, .syn-dot, .syn-float, .syn-rise { animation: none !important; transition: none !important; }
  .syn-btn::after { display: none; }
  .syn-btn:hover, .syn-chip:hover, .syn-card--lift:hover { transform: none; }
  .syn-rise { opacity: 1; transform: none; }
}