/* ============================================
   הספרייה של מאי — Design tokens & base styles
   ============================================ */

:root {
  /* Palette — parchment library */
  --ink: #2a1810;
  --ink-soft: #5a4636;
  --ink-mute: #8a7461;

  --paper: #f1e6cd;        /* aged parchment */
  --paper-2: #e8d9b5;      /* deeper parchment */
  --paper-card: #fbf3df;   /* card top */

  --walnut: #3a2113;       /* deep walnut */
  --walnut-2: #5d3a1f;     /* mid walnut */
  --walnut-3: #7a4a26;     /* warm walnut */

  --gold: #b48a3a;
  --gold-2: #c9a14a;
  --gold-soft: #e0c082;

  --moss: #4a6a3a;
  --rust: #a64a2a;
  --plum: #6a3a5a;

  --line: rgba(58, 33, 19, 0.14);
  --line-strong: rgba(58, 33, 19, 0.28);

  /* Type */
  --font-serif: "Frank Ruhl Libre", "David Libre", serif;
  --font-sans: "Heebo", "Assistant", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  /* Surfaces */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  --shadow-card: 0 1px 0 rgba(255,248,232,.55) inset, 0 1px 2px rgba(58,33,19,.06), 0 8px 24px -12px rgba(58,33,19,.22);
  --shadow-lift: 0 20px 50px -20px rgba(20,10,4,.55);
  --shadow-spine: 1px 0 0 rgba(255,255,255,.18) inset, -2px 0 6px -2px rgba(0,0,0,.45);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

html { direction: rtl; }
body { direction: rtl; min-height: 100vh; }

button { font-family: inherit; color: inherit; cursor: pointer; border: 0; background: none; direction: inherit; text-align: inherit; }
input, textarea, select { font-family: inherit; color: inherit; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--walnut-2); border-radius: 999px; border: 2px solid var(--paper); }
::-webkit-scrollbar-track { background: transparent; }

/* ============================================
   Page chrome — wood-grain edges + parchment
   ============================================ */

.app-root {
  min-height: 100vh;
  position: relative;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(255, 240, 210, .55), transparent 70%),
    radial-gradient(ellipse 60% 40% at 50% 100%, rgba(122, 74, 38, .14), transparent 70%),
    linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%);
}

/* paper grain via SVG noise — fixed so it doesn't scroll */
.app-root::before {
  content: "";
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml;utf8,<svg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 .25  0 0 0 0 .16  0 0 0 0 .08  0 0 0 .25 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  opacity: .35;
  mix-blend-mode: multiply;
  pointer-events: none;
  z-index: 0;
}

/* dark-wood theme */
.theme-walnut .app-root {
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(180, 138, 58, .14), transparent 70%),
    radial-gradient(ellipse 90% 100% at 50% 100%, rgba(10, 6, 3, .65), transparent 70%),
    linear-gradient(180deg, #3a2113 0%, #2a1810 60%, #1a0e08 100%);
  color: var(--paper);
}
.theme-walnut { color: var(--paper); --ink: var(--paper); --ink-soft: #d8c5a0; --ink-mute: #a89373; --line: rgba(240,230,210,.12); --line-strong: rgba(240,230,210,.22); }
.theme-walnut .app-root::before { opacity: .22; mix-blend-mode: overlay; }

/* sage theme — green spine */
.theme-sage .app-root {
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, rgba(255, 240, 210, .35), transparent 70%),
    linear-gradient(180deg, #ecead9 0%, #d6d4b8 100%);
}

/* ============================================
   Glass theme — "הספרייה המוחשית"
   blurred library photo + frosted glass cards
   ============================================ */

.theme-glass {
  --ink: #3a2417;
  --ink-soft: #5a4030;
  --ink-mute: #7a5f49;
  --line: rgba(255, 255, 255, .45);
  --line-strong: rgba(255, 255, 255, .6);
  --paper-card: rgba(255, 250, 240, .66);
  --shadow-card: 0 1px 0 rgba(255,255,255,.5) inset, 0 10px 36px -14px rgba(30,15,5,.45);
}

.theme-glass .app-root {
  background: #3a2412 url("assets/library-bg.png") center / cover no-repeat fixed;
}
.theme-glass .app-root::before { display: none; }

/* frosted surfaces */
.theme-glass .card,
.theme-glass .stat {
  background: linear-gradient(180deg, rgba(255, 250, 240, .72) 0%, rgba(248, 238, 222, .56) 100%);
  backdrop-filter: blur(16px) saturate(1.1);
  -webkit-backdrop-filter: blur(16px) saturate(1.1);
  border: 1px solid rgba(255, 255, 255, .5);
  box-shadow: 0 1px 0 rgba(255,255,255,.55) inset, 0 14px 40px -18px rgba(25, 12, 4, .55);
}
.theme-glass .card { border-radius: 26px; }
.theme-glass .stat { border-radius: 20px; }

.theme-glass .card-flat {
  background: rgba(255, 250, 240, .28);
  border: 1px dashed rgba(255, 255, 255, .55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* centered glass title pill */
.theme-glass .topbar { justify-content: center; }
.theme-glass .topbar > .row { display: none; }
.theme-glass .brand {
  flex-direction: row;
  background: linear-gradient(180deg, rgba(255, 250, 240, .8), rgba(244, 232, 212, .62));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, .65);
  border-radius: 20px;
  padding: 10px 30px;
  box-shadow: 0 1px 0 rgba(255,255,255,.6) inset, 0 12px 30px -14px rgba(25,12,4,.5);
}
.theme-glass .brand-mark { display: none; }
.theme-glass .brand-name { font-size: 28px; color: #4e2e14; }
.theme-glass .brand-sub { text-align: center; color: #7a5a3a; }

.theme-glass .screen-title { color: #f4e8d4; text-shadow: 0 2px 14px rgba(25,12,4,.55); }
.theme-glass .screen-sub { color: rgba(244, 232, 212, .8); text-shadow: 0 1px 8px rgba(25,12,4,.5); }

/* buttons & inputs */
.theme-glass .btn {
  background: rgba(255, 250, 240, .62);
  border-color: rgba(255, 255, 255, .55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.theme-glass .btn-primary {
  background: linear-gradient(180deg, #7a4a26 0%, #5d3a1f 100%);
  color: #f0dcb4;
  border-color: rgba(255, 255, 255, .25);
}
.theme-glass .btn-ghost { background: transparent; border-color: transparent; }
.theme-glass .btn-ghost:hover { background: rgba(255, 250, 240, .35); }

.theme-glass .input,
.theme-glass .field-input {
  background: rgba(255, 253, 248, .6);
  border-color: rgba(255, 255, 255, .6);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.theme-glass .chip {
  background: rgba(255, 250, 240, .58);
  border-color: rgba(255, 255, 255, .55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.theme-glass .chip:hover { background: rgba(255, 250, 240, .8); }

/* bottom nav — full-width frosted bar, icon above label */
.theme-glass .nav {
  bottom: 0;
  left: 0;
  right: 0;
  width: 100%;
  transform: none;
  border-radius: 0;
  justify-content: space-around;
  gap: 0;
  padding: 10px 8px 14px;
  background: rgba(243, 234, 219, .88);
  backdrop-filter: blur(24px) saturate(1.1);
  -webkit-backdrop-filter: blur(24px) saturate(1.1);
  box-shadow: 0 1px 0 rgba(255,255,255,.6) inset, 0 -10px 36px -10px rgba(25, 12, 4, .4);
}
.theme-glass .nav-tab {
  flex-direction: column;
  gap: 4px;
  padding: 6px 16px;
  color: #8a6a48;
  font-size: 12px;
  font-weight: 500;
}
.theme-glass .nav-tab svg { width: 22px; height: 22px; }
.theme-glass .nav-tab:hover { color: #5d3a1f; }
.theme-glass .nav-tab.active {
  background: none;
  box-shadow: none;
  color: #4a2c16;
  font-weight: 700;
}
.theme-glass .nav-tab .nav-label { display: inline; }

/* modal / sheet — heavier frost */
.theme-glass .modal,
.theme-glass .sheet {
  background: rgba(250, 243, 230, .9);
  backdrop-filter: blur(30px) saturate(1.15);
  -webkit-backdrop-filter: blur(30px) saturate(1.15);
  border-color: rgba(255, 255, 255, .6);
}
.theme-glass .modal-back,
.theme-glass .sheet-back { background: rgba(25, 12, 4, .35); }

/* chat bubbles */
.theme-glass .chat-msg.from-agent {
  background: rgba(255, 250, 240, .7);
  border-color: rgba(255, 255, 255, .55);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.theme-glass .progress { background: rgba(58, 33, 19, .14); }

.theme-glass ::-webkit-scrollbar-thumb { border-color: transparent; }

@media (max-width: 720px) {
  .theme-glass .nav-tab { padding: 6px 10px; }
  .theme-glass .nav-tab .nav-label { display: inline; }
}

/* ============================================
   Layout — page shell
   ============================================ */

.shell {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 28px 36px 160px;
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(140deg, var(--walnut-3), var(--walnut));
  display: grid;
  place-items: center;
  color: var(--gold-soft);
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  box-shadow: 0 0 0 1px var(--gold) inset, 0 4px 12px rgba(58,33,19,.25);
}
.brand-name {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1;
}
.brand-sub {
  font-size: 12px;
  color: var(--ink-mute);
  margin-top: 2px;
}

/* big screen title  */
.screen-title {
  font-family: var(--font-serif);
  font-size: 56px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.025em;
  margin: 0;
}
.screen-sub {
  font-size: 14px;
  color: var(--ink-mute);
  margin-top: 6px;
}

/* ============================================
   Card — parchment surface
   ============================================ */

.card {
  background: linear-gradient(180deg, var(--paper-card) 0%, var(--paper) 100%);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--line);
  padding: 22px;
  position: relative;
}
.theme-walnut .card {
  background: linear-gradient(180deg, #3d2818 0%, #321f10 100%);
  border-color: rgba(240,230,210,.08);
  box-shadow: 0 1px 0 rgba(255,220,170,.06) inset, 0 12px 32px -16px rgba(0,0,0,.55);
}

.card-tight { padding: 14px; }
.card-flat { box-shadow: none; border: 1px dashed var(--line-strong); background: transparent; }

/* ============================================
   Pill / button
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  background: var(--paper-card);
  border: 1px solid var(--line-strong);
  color: var(--ink);
  transition: transform .12s ease, box-shadow .12s ease, background .15s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 4px 10px -4px rgba(58,33,19,.2); }
.btn:active { transform: translateY(0); }
.btn-primary {
  background: linear-gradient(180deg, var(--walnut-3) 0%, var(--walnut-2) 100%);
  color: var(--gold-soft);
  border-color: var(--walnut);
  box-shadow: 0 1px 0 rgba(255,220,170,.18) inset, 0 4px 10px -4px rgba(58,33,19,.4);
}
.btn-primary:hover { box-shadow: 0 1px 0 rgba(255,220,170,.18) inset, 0 8px 20px -6px rgba(58,33,19,.5); }
.btn-ghost { background: transparent; border-color: transparent; color: var(--ink-soft); }
.btn-ghost:hover { background: rgba(58,33,19,.06); }
.theme-walnut .btn-ghost:hover { background: rgba(240,230,210,.06); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-icon { padding: 0; width: 38px; height: 38px; justify-content: center; border-radius: 999px; }

/* ============================================
   Input
   ============================================ */

.input {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-strong);
  background: var(--paper-card);
  font-size: 14px;
  color: var(--ink);
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}
.input:focus { border-color: var(--gold); box-shadow: 0 0 0 3px rgba(180,138,58,.15); }
.theme-walnut .input { background: rgba(255,255,255,.05); }

.search {
  position: relative;
}
.search .input { padding-inline-start: 44px; }
.search-icon {
  position: absolute;
  inset-inline-start: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--ink-mute);
  pointer-events: none;
}

/* ============================================
   Bottom nav
   ============================================ */

.nav {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px;
  border-radius: 999px;
  background: rgba(58, 33, 19, .92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 20px 50px -20px rgba(20,10,4,.7), 0 0 0 1px rgba(255,220,170,.1) inset;
  z-index: 50;
}
.nav-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: 999px;
  color: rgba(240, 230, 210, .65);
  font-size: 13px;
  font-weight: 500;
  transition: all .2s ease;
}
.nav-tab:hover { color: rgba(240,230,210,.95); }
.nav-tab.active {
  background: var(--paper-card);
  color: var(--walnut);
  font-weight: 700;
  box-shadow: 0 4px 10px -4px rgba(0,0,0,.4);
}
.nav-tab svg { width: 18px; height: 18px; }

/* ============================================
   Book spine — physical book look
   ============================================ */

.spine {
  position: relative;
  width: 38px;
  height: 200px;
  flex: 0 0 auto;
  border-radius: 2px 3px 3px 2px;
  background: linear-gradient(90deg,
    rgba(0,0,0,.25) 0%,
    rgba(255,255,255,.06) 8%,
    rgba(0,0,0,0) 50%,
    rgba(255,255,255,.06) 92%,
    rgba(0,0,0,.35) 100%
  ),
  var(--spine-color, #5d3a1f);
  box-shadow: var(--shadow-spine);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform .25s cubic-bezier(.34,1.56,.64,1), filter .2s;
  color: rgba(255,240,210,.92);
  overflow: hidden;
}
.spine:hover { transform: translateY(-10px); filter: brightness(1.12); }
.spine-text {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-family: var(--font-serif);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .02em;
  padding: 12px 4px;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-height: 90%;
  line-height: 1;
  text-shadow: 0 1px 2px rgba(0,0,0,.3);
}
.spine-band {
  position: absolute;
  inset-inline: 0;
  height: 2px;
  background: rgba(255,255,255,.2);
}
.spine-band.top { top: 14px; }
.spine-band.bot { bottom: 14px; }

/* shelf */
.shelf {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  padding: 14px 22px 0;
  background:
    linear-gradient(180deg, transparent 0%, transparent calc(100% - 16px), #5d3a1f calc(100% - 16px), #3a2113 100%);
  border-radius: 6px 6px 14px 14px;
  position: relative;
  min-height: 220px;
}
.shelf::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -4px;
  height: 6px;
  background: linear-gradient(180deg, rgba(0,0,0,.35), transparent);
  filter: blur(4px);
}

/* book cover (small) */
.cover {
  position: relative;
  border-radius: 3px 6px 6px 3px;
  background: var(--cover-color, #5d3a1f);
  box-shadow: 0 6px 16px -8px rgba(0,0,0,.4), -2px 0 0 rgba(255,255,255,.12) inset, 2px 0 5px rgba(0,0,0,.15);
  overflow: hidden;
  color: #fff8e8;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 10px 8px 10px 10px;
  cursor: pointer;
  transition: transform .25s cubic-bezier(.34,1.56,.64,1);
}
.cover:hover { transform: translateY(-4px) rotate(-1deg); }
.cover-band {
  position: absolute;
  inset-inline: 0;
  top: 32%;
  height: 6px;
  background: rgba(0,0,0,.18);
  border-top: 1px solid rgba(255,255,255,.18);
  border-bottom: 1px solid rgba(255,255,255,.18);
}
.cover-title {
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.1;
  text-shadow: 0 1px 2px rgba(0,0,0,.3);
}
.cover-author {
  font-size: 10px;
  opacity: .85;
}

/* status pill */
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .01em;
}
.pill-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: currentColor;
}
.pill-available { background: rgba(74,106,58,.16); color: var(--moss); }
.pill-loaned { background: rgba(166,74,42,.16); color: var(--rust); }
.pill-reading { background: rgba(180,138,58,.18); color: var(--gold); }
.pill-finished { background: rgba(58,33,19,.1); color: var(--ink-mute); }

/* ============================================
   Stats card — dashboard
   ============================================ */
.stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  background: var(--paper-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.theme-walnut .stat { background: #3d2818; border-color: rgba(240,230,210,.08); }
.stat-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  display: grid; place-items: center;
  background: rgba(180,138,58,.12);
  color: var(--gold);
  margin-bottom: 4px;
}
.stat-num {
  font-family: var(--font-serif);
  font-size: 36px;
  font-weight: 700;
  line-height: 1;
}
.stat-label { font-size: 13px; color: var(--ink-mute); }
.stat-trend { font-size: 11px; color: var(--moss); margin-top: 4px; }

/* ============================================
   Modal
   ============================================ */
.modal-back {
  position: fixed; inset: 0;
  background: rgba(20,10,4,.55);
  backdrop-filter: blur(6px);
  display: grid;
  place-items: center;
  z-index: 100;
  padding: 20px;
}
.modal {
  width: 100%;
  max-width: 540px;
  max-height: 88vh;
  overflow: auto;
  background: var(--paper-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lift);
  padding: 28px;
  overflow-x: hidden;
}
.theme-walnut .modal { background: #3a2113; color: var(--paper); }

.modal-title {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -.02em;
  margin: 0 0 8px;
}
.modal-sub { color: var(--ink-mute); font-size: 14px; margin-bottom: 20px; }

.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.field-label { font-size: 12px; font-weight: 600; color: var(--ink-soft); }
.field-input {
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  background: rgba(255,255,255,.5);
  font-size: 14px;
  outline: none;
  width: 100%;
  resize: vertical;
  font-family: inherit;
}
.theme-walnut .field-input { background: rgba(255,255,255,.05); color: var(--paper); }
.field-input:focus { border-color: var(--gold); }

/* ============================================
   Avatar
   ============================================ */
.avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(140deg, var(--walnut-3), var(--walnut));
  display: grid; place-items: center;
  color: var(--gold-soft);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 16px;
}
.avatar-lg { width: 56px; height: 56px; font-size: 22px; }
.avatar-sm { width: 28px; height: 28px; font-size: 12px; }

/* progress bar */
.progress {
  width: 100%;
  height: 4px;
  background: rgba(58,33,19,.1);
  border-radius: 999px;
  overflow: hidden;
}
.theme-walnut .progress { background: rgba(240,230,210,.1); }
.progress > span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--gold-2), var(--gold));
  border-radius: 999px;
}

/* stars */
.stars { display: inline-flex; gap: 2px; color: var(--gold); }

/* ============================================
   Chat
   ============================================ */

.chat-msg {
  max-width: 70%;
  padding: 12px 16px;
  border-radius: 18px;
  font-size: 14px;
  line-height: 1.45;
}
.chat-msg.from-agent {
  background: var(--paper-card);
  border-bottom-right-radius: 6px;
  align-self: flex-end;
  border: 1px solid var(--line);
}
.chat-msg.from-user {
  background: linear-gradient(180deg, var(--walnut-3), var(--walnut-2));
  color: var(--paper);
  border-bottom-left-radius: 6px;
  align-self: flex-start;
}
.theme-walnut .chat-msg.from-agent { background: rgba(255,255,255,.05); border-color: rgba(240,230,210,.08); }

.chip {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--paper-card);
  border: 1px solid var(--line-strong);
  font-size: 13px;
  white-space: nowrap;
  cursor: pointer;
  transition: background .15s;
}
.chip:hover { background: var(--paper-2); }
.theme-walnut .chip { background: rgba(255,255,255,.05); }
.theme-walnut .chip:hover { background: rgba(255,255,255,.1); }

/* ============================================
   Detail drawer / sheet
   ============================================ */
.sheet-back {
  position: fixed; inset: 0;
  background: rgba(20,10,4,.6);
  backdrop-filter: blur(6px);
  z-index: 90;
}
.sheet {
  position: fixed;
  top: 0; bottom: 0;
  inset-inline-start: 0;
  width: 100%;
  max-width: 560px;
  background: var(--paper-card);
  z-index: 95;
  box-shadow: 30px 0 80px -20px rgba(20,10,4,.5);
  overflow: auto;
  padding: 32px;
  animation: slide-in .3s ease;
}
.theme-walnut .sheet { background: #3a2113; }

@keyframes slide-in {
  from { transform: translateX(40px); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* ============================================
   Utility
   ============================================ */
.row { display: flex; align-items: center; }
.col { display: flex; flex-direction: column; }
.between { justify-content: space-between; }
.gap-2 { gap: 8px; } .gap-3 { gap: 12px; } .gap-4 { gap: 16px; } .gap-6 { gap: 24px; }
.grow { flex: 1; }
.mt-2 { margin-top: 8px; } .mt-3 { margin-top: 12px; } .mt-4 { margin-top: 16px; } .mt-6 { margin-top: 24px; } .mt-8 { margin-top: 32px; }
.muted { color: var(--ink-mute); }
.serif { font-family: var(--font-serif); }

/* responsive */
@media (max-width: 720px) {
  .shell { padding: 14px 14px 112px; }
  .screen-title { font-size: 34px; }
  .nav-tab { padding: 8px 12px; font-size: 12px; }
  .nav-tab .nav-label { display: none; }
  .nav-tab.active .nav-label { display: inline; }
  .modal { padding: 20px; }
  .sheet { padding: 20px; max-width: 100%; }

  /* dashboard two-col → stack */
  .responsive-2col { grid-template-columns: 1fr !important; }
  /* stats → 2-up on phones */
  .stat-grid { grid-template-columns: 1fr 1fr !important; }
  .stat { padding: 14px 16px; }
  .stat-num { font-size: 30px; }

  /* loan cards → stack the action column full-width */
  .loan-card { flex-wrap: wrap; }
  .loan-card .loan-meta { flex: 1 1 60%; min-width: 0; }
  .loan-card .loan-actions {
    min-width: 0 !important;
    width: 100%;
    flex-direction: row !important;
    align-items: center !important;
    justify-content: space-between;
    flex-wrap: wrap;
  }
  .loan-card .loan-actions > .row { flex: 1; justify-content: flex-end; }

  /* card padding trim */
  .card { padding: 18px; }
}

/* narrow phones */
@media (max-width: 420px) {
  .screen-title { font-size: 28px; }
  .stat-grid { grid-template-columns: 1fr 1fr !important; }
  .loan-card .loan-actions { flex-direction: column !important; align-items: stretch !important; }
  .loan-card .loan-actions > .row { justify-content: stretch; }
  .loan-card .loan-actions > .row > .btn { flex: 1; justify-content: center; }
}