/* =============================================================================
   EngineerOS · Components
   Element design. No borders — surfaces lift with tint + blur + shadow.
   Continuous-curve squircles. Hover-to-animate, touch-to-animate.
   ========================================================================== */

/* ---- Surfaces ------------------------------------------------------------ */
.surface { background: var(--surface-1); border-radius: var(--r-card); box-shadow: var(--shadow-1); }
.card    { background: var(--surface-1); border-radius: var(--r-card); box-shadow: var(--shadow-1);
           padding: var(--s-5); }
.card + .card, .stack > * + * { margin-top: var(--s-4); }
.card-tight { padding: var(--s-4); }
.sheet   { background: var(--surface-2); border-radius: var(--r-sheet); box-shadow: var(--shadow-2); padding: var(--s-5); }
.well    { background: var(--surface-sunken); border-radius: var(--r-field); }

/* Material (glass) — for the functional layer (bars, floating controls). */
.material {
  background: var(--material);
  backdrop-filter: saturate(var(--material-saturate)) blur(var(--material-blur));
  -webkit-backdrop-filter: saturate(var(--material-saturate)) blur(var(--material-blur));
}
/* Without backdrop-filter, fall back to a solid surface so bars stay legible. */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .material, #topbar { background: var(--surface-1); }
}

/* ---- Squircle: true continuous-curve mask for square decorative elements - */
.squircle { -webkit-mask: var(--squircle) center / 100% 100% no-repeat;
            mask: var(--squircle) center / 100% 100% no-repeat; }

/* ---- Press / tap micro-interactions ------------------------------------- */
.pressable { transition: transform var(--dur-1) var(--ease-emphasized), box-shadow var(--dur-2) var(--ease-standard), background var(--dur-2) var(--ease-standard); }
.pressable:active { transform: scale(.965); }

.tap { cursor: pointer; transition: transform var(--dur-2) var(--ease-emphasized), box-shadow var(--dur-2) var(--ease-standard), background var(--dur-2) var(--ease-standard); }
@media (hover: hover) { .tap:hover { transform: translateY(-3px); box-shadow: var(--shadow-2); } }
.tap:active { transform: translateY(0) scale(.99); box-shadow: var(--shadow-1); }

/* ---- Layout helpers ------------------------------------------------------ */
.row { display: flex; align-items: center; gap: var(--s-4); }
.row-tight { display: flex; align-items: center; gap: var(--s-2); }
.col { display: flex; flex-direction: column; }
.between { justify-content: space-between; }
.wrap { flex-wrap: wrap; }
.grow { flex: 1; min-width: 0; }
.mt-1{margin-top:var(--s-1);} .mt-2{margin-top:var(--s-2);} .mt-3{margin-top:var(--s-3);}
.mt-4{margin-top:var(--s-4);} .mt-5{margin-top:var(--s-5);} .mt-6{margin-top:var(--s-6);}
.mb-2{margin-bottom:var(--s-2);} .mb-3{margin-bottom:var(--s-3);} .mb-4{margin-bottom:var(--s-4);}
.section-label { font-size: var(--fs-foot); font-weight: var(--fw-bold); letter-spacing: 0.04em;
                 text-transform: uppercase; color: var(--text-3); margin: var(--s-2) var(--s-1) var(--s-3); }

/* ---- Buttons ------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s-2);
  height: 52px; padding: 0 var(--s-5); width: 100%;
  border-radius: var(--r-md); font-size: var(--fs-headline); font-weight: var(--fw-semibold);
  letter-spacing: -0.01em; background: var(--fill); color: var(--text);
  transition: transform var(--dur-1) var(--ease-emphasized), background var(--dur-2) var(--ease-standard),
              box-shadow var(--dur-2) var(--ease-standard), opacity var(--dur-2);
}
.btn:active { transform: scale(.965); }
@media (hover: hover) { .btn:hover { background: var(--fill-strong); } }
.btn .lucide { width: 19px; height: 19px; }
.btn-primary { background: var(--accent); color: var(--on-accent); box-shadow: var(--glow-accent); }
@media (hover: hover) { .btn-primary:hover { background: var(--accent); filter: brightness(1.06); } }
.btn-amber { background: var(--amber); color: #3a2600; box-shadow: var(--glow-amber); }
.btn-success { background: var(--green); color: #04340f; box-shadow: var(--glow-green); }
.btn-ghost { background: var(--fill); }
.btn-quiet { background: transparent; box-shadow: none; }
.btn-sm { height: 42px; padding: 0 var(--s-4); width: auto; font-size: var(--fs-callout); border-radius: var(--r-sm); }
.btn-row { display: flex; gap: var(--s-3); }
.btn[disabled] { opacity: .42; pointer-events: none; }

/* Icon button — round, quiet, springs on press. */
.iconbtn { width: 44px; height: 44px; min-width: 44px; border-radius: var(--r-pill);
  display: grid; place-items: center; color: var(--text); background: var(--fill);
  transition: transform var(--dur-1) var(--ease-emphasized), background var(--dur-2); }
.iconbtn:active { transform: scale(.9); }
@media (hover: hover) { .iconbtn:hover { background: var(--fill-strong); } }
.iconbtn.is-quiet { background: transparent; }
.iconbtn .lucide { width: 20px; height: 20px; }

/* ---- Chips / pills / badges --------------------------------------------- */
.chip { width: 46px; height: 46px; min-width: 46px; display: grid; place-items: center;
  background: var(--fill); color: var(--text); border-radius: var(--r-chip);
  /* true continuous-curve squircle (chips carry no shadow, so masking is safe) */
  -webkit-mask: var(--squircle) center / 100% 100% no-repeat;
  mask: var(--squircle) center / 100% 100% no-repeat; }
.chip .lucide { width: 23px; height: 23px; }
.chip-sm { width: 38px; height: 38px; min-width: 38px; border-radius: 13px; }
.chip-accent { background: color-mix(in srgb, var(--accent) 16%, transparent); color: var(--accent); }
.chip-amber  { background: color-mix(in srgb, var(--amber) 18%, transparent);  color: var(--amber); }
.chip-green  { background: color-mix(in srgb, var(--green) 18%, transparent);  color: var(--green); }
.chip-muted  { opacity: .5; }

.pill { display: inline-flex; align-items: center; gap: var(--s-1); height: 30px; padding: 0 var(--s-3);
  border-radius: var(--r-pill); background: var(--fill); color: var(--text-2);
  font-size: var(--fs-foot); font-weight: var(--fw-semibold); }
.badge { display: inline-flex; align-items: center; gap: 5px; padding: 4px 10px; border-radius: var(--r-pill);
  font-size: var(--fs-caption); font-weight: var(--fw-bold); letter-spacing: .01em; }
.badge .lucide { width: 13px; height: 13px; }
.badge-accent { background: color-mix(in srgb, var(--accent) 15%, transparent); color: var(--accent); }
.badge-amber  { background: color-mix(in srgb, var(--amber) 18%, transparent);  color: color-mix(in srgb, var(--amber) 82%, #5a3d00); }
.badge-green  { background: color-mix(in srgb, var(--green) 18%, transparent);  color: color-mix(in srgb, var(--green) 70%, #0a3d18); }
:root[data-theme="dark"] .badge-amber, :root[data-theme="dark"] .badge-green { color: var(--text); }
@media (prefers-color-scheme: dark){ :root:not([data-theme="light"]) .badge-amber,
  :root:not([data-theme="light"]) .badge-green { color: var(--text); } }

/* ---- Lists: separation by SPACING + soft fill, never lines --------------- */
.list { display: flex; flex-direction: column; gap: 6px; }
.list-row { display: flex; align-items: center; gap: var(--s-4); padding: var(--s-4);
  background: var(--surface-1); border-radius: var(--r-md); box-shadow: var(--shadow-1);
  transition: transform var(--dur-2) var(--ease-emphasized), box-shadow var(--dur-2) var(--ease-standard), background var(--dur-2); }
.list-row.tap { cursor: pointer; }
@media (hover: hover) { .list-row.tap:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); } }
.list-row.tap:active { transform: scale(.99); box-shadow: var(--shadow-1); }
.list-row .lt { flex: 1; min-width: 0; }
.list-row .lt .t1 { font-size: var(--fs-headline); font-weight: var(--fw-semibold); }
.list-row .lt .t2 { font-size: var(--fs-foot); color: var(--text-3); margin-top: 2px; }
.list-row .chev { color: var(--text-3); }
.list-row .chev .lucide { width: 18px; height: 18px; }
.is-muted { opacity: .55; }

/* ---- Fields -------------------------------------------------------------- */
.field { margin-bottom: var(--s-4); }
.field > label { display: block; font-size: var(--fs-foot); font-weight: var(--fw-bold);
  color: var(--text-2); margin: 0 var(--s-1) 6px; }
.input, .textarea, select.input {
  width: 100%; padding: 13px var(--s-4); border-radius: var(--r-field);
  background: var(--surface-sunken); color: var(--text); resize: vertical;
  transition: box-shadow var(--dur-2) var(--ease-standard), background var(--dur-2);
}
.input::placeholder, .textarea::placeholder { color: var(--text-3); }
.input:focus, .textarea:focus { outline: none; box-shadow: var(--ring); background: var(--surface-1); }
.textarea { min-height: 98px; line-height: 1.5; }
.hint { font-size: var(--fs-foot); color: var(--text-3); margin: 6px var(--s-1) 0; }

/* Segmented control — sliding selection, no lines. */
.segmented { display: inline-flex; width: 100%; padding: 3px; gap: 2px; border-radius: var(--r-field);
  background: var(--surface-sunken); }
.segmented button { flex: 1; padding: 9px 10px; border-radius: 11px; font-size: var(--fs-callout);
  font-weight: var(--fw-semibold); color: var(--text-2);
  transition: color var(--dur-2), background var(--dur-2), box-shadow var(--dur-2), transform var(--dur-1) var(--ease-emphasized); }
.segmented button:active { transform: scale(.96); }
.segmented button.is-on { background: var(--surface-1); color: var(--text); box-shadow: var(--shadow-1); }

/* Toggle switch */
.switch { width: 52px; height: 32px; min-width: 52px; border-radius: var(--r-pill); padding: 3px;
  display: flex; align-items: center; background: var(--fill-strong);
  transition: background var(--dur-2) var(--ease-standard); }
.switch .knob { width: 26px; height: 26px; border-radius: 50%; background: #fff; box-shadow: var(--shadow-1);
  transition: transform var(--dur-2) var(--ease-springy); }
.switch.is-on { background: var(--green); }
.switch.is-on .knob { transform: translateX(20px); }

/* ---- Progress ring + meter ---------------------------------------------- */
.ring { position: relative; display: grid; place-items: center; }
.ring svg { transform: rotate(-90deg); }
.ring .track { fill: none; stroke: var(--fill-strong); }
.ring .bar { fill: none; stroke: url(#ringGrad); stroke-linecap: round;
  transition: stroke-dashoffset 1s var(--ease-emphasized); }
.ring .ring-label { position: absolute; text-align: center; }
.ring .ring-label .pct { font-size: 30px; font-weight: var(--fw-heavy); letter-spacing: -0.03em; }
.ring .ring-label .cap { font-size: var(--fs-caption); color: var(--text-3); font-weight: var(--fw-semibold); }

.meter { height: 8px; border-radius: var(--r-pill); background: var(--fill-strong); overflow: hidden; }
.meter > i { display: block; height: 100%; width: 0; border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width .9s var(--ease-emphasized); }
.meter.amber > i { background: linear-gradient(90deg, var(--amber), #ffd60a); }
.meter.green > i { background: linear-gradient(90deg, var(--green), #a0f0b0); }

/* ---- Stat + readiness tiles --------------------------------------------- */
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: var(--s-3); }
.grid-2 { display: grid; grid-template-columns: repeat(2,1fr); gap: var(--s-3); }

/* Responsive card grids — fill wider screens instead of a lone narrow column. */
.auto-grid { display: grid; gap: var(--s-3); grid-template-columns: 1fr; }
.auto-grid > .card { margin-top: 0; }
@media (min-width: 640px)  { .auto-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1100px) { .auto-grid { grid-template-columns: repeat(3, 1fr); } }
.ready-grid { display: grid; gap: var(--s-3); grid-template-columns: repeat(2, 1fr); }
@media (min-width: 720px)  { .ready-grid { grid-template-columns: repeat(4, 1fr); } }
.home-grid { display: grid; gap: var(--s-4); grid-template-columns: 1fr; }
@media (min-width: 940px)  { .home-grid { grid-template-columns: 1.25fr 1fr; align-items: start; } }
/* Row lists flow into columns on wider screens. */
@media (min-width: 760px)  { .list { display: grid; grid-template-columns: repeat(2, 1fr); align-items: start; gap: 8px; } }
@media (min-width: 1340px) { .view-grid .list { grid-template-columns: repeat(3, 1fr); } }
.stat { background: var(--surface-1); border-radius: var(--r-md); box-shadow: var(--shadow-1); padding: var(--s-4); }
.stat .n { font-size: 26px; font-weight: var(--fw-heavy); letter-spacing: -0.03em; }
.stat .l { font-size: var(--fs-caption); color: var(--text-3); font-weight: var(--fw-semibold); margin-top: 2px; }
.ready { background: var(--surface-1); border-radius: var(--r-md); box-shadow: var(--shadow-1); padding: var(--s-4); }
.ready .rt { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.ready .rt .name { font-size: var(--fs-foot); font-weight: var(--fw-bold); }
.ready .rt .v { font-size: var(--fs-foot); font-weight: var(--fw-bold); color: var(--text-2); }

/* ---- Checklist ----------------------------------------------------------- */
.check { display: flex; align-items: flex-start; gap: var(--s-3); padding: 12px 6px; cursor: pointer; }
.check input { position: absolute; opacity: 0; width: 0; height: 0; }
.check .box { width: 26px; height: 26px; min-width: 26px; border-radius: 50%; background: var(--fill-strong);
  display: grid; place-items: center; margin-top: 1px;
  transition: background var(--dur-2) var(--ease-standard), transform var(--dur-1) var(--ease-springy); }
.check .box .lucide { width: 15px; height: 15px; color: #fff; opacity: 0; transform: scale(.4);
  transition: opacity var(--dur-2), transform var(--dur-2) var(--ease-springy); }
.check input:checked + .box { background: var(--green); transform: scale(1.04); }
.check input:checked + .box .lucide { opacity: 1; transform: scale(1); }
.check .ctext { font-size: var(--fs-callout); line-height: 1.4; padding-top: 3px; transition: color var(--dur-2); }
.check input:checked ~ .ctext { color: var(--text-3); text-decoration: line-through; }
.check:active .box { transform: scale(.9); }

/* Numbered "today" steps — leading number chips, no lines. */
.steps { list-style: none; counter-reset: s; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 4px; }
.steps li { counter-increment: s; position: relative; padding: 11px 0 11px 42px; font-size: var(--fs-callout); line-height: 1.4; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 8px; width: 28px; height: 28px;
  border-radius: 9px; background: var(--fill-strong); color: var(--text-2);
  font-size: var(--fs-foot); font-weight: var(--fw-bold); display: grid; place-items: center; }

/* ---- Resource item ------------------------------------------------------- */
.res-item { display: flex; gap: var(--s-3); align-items: center; padding: var(--s-4);
  background: var(--surface-1); border-radius: var(--r-md); box-shadow: var(--shadow-1);
  transition: transform var(--dur-2) var(--ease-emphasized), box-shadow var(--dur-2); }
@media (hover: hover){ .res-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-2); } }
.res-item:active { transform: scale(.99); }
.res-item .ri-t { font-size: var(--fs-callout); font-weight: var(--fw-semibold); display: flex; align-items: center; gap: 7px; flex-wrap: wrap; }
.res-item .ri-d { font-size: var(--fs-foot); color: var(--text-2); margin-top: 2px; }
.res-item .ri-open { color: var(--accent); } .res-item .ri-open .lucide { width: 18px; height: 18px; }

/* ---- Hero / logo --------------------------------------------------------- */
.hero { min-height: calc(100svh - var(--s-9)); display: flex; flex-direction: column; justify-content: center; gap: var(--s-6); padding: var(--s-7) var(--s-1); }
.logo-mark { width: 76px; height: 76px; display: grid; place-items: center; color: #fff;
  background: linear-gradient(150deg, var(--accent), var(--accent-2)); border-radius: 22px;
  /* squircle shape + a shadow that follows the squircle silhouette (drop-shadow, not box-shadow) */
  -webkit-mask: var(--squircle) center / 100% 100% no-repeat;
  mask: var(--squircle) center / 100% 100% no-repeat;
  filter: drop-shadow(0 16px 34px color-mix(in srgb, var(--accent) 40%, transparent)); }
.logo-mark .lucide { width: 40px; height: 40px; }

/* ---- Notice / empty ------------------------------------------------------ */
.notice { background: var(--fill); border-radius: var(--r-md); padding: 13px 15px; font-size: var(--fs-callout); }
.notice-accent { background: color-mix(in srgb, var(--accent) 10%, transparent); }
.notice-amber  { background: color-mix(in srgb, var(--amber) 12%, transparent); }
.empty { text-align: center; padding: var(--s-9) var(--s-5); color: var(--text-3); }
.empty .chip { margin: 0 auto var(--s-3); width: 56px; height: 56px; }

/* ---- Tab bar items ------------------------------------------------------- */
.tabbar-pill { pointer-events: auto; display: flex; gap: 2px; padding: 6px; border-radius: var(--r-pill);
  box-shadow: var(--shadow-2); max-width: 100%; }
.tab { display: flex; flex-direction: column; align-items: center; gap: 3px; min-width: 60px;
  padding: 8px 14px; border-radius: var(--r-pill); color: var(--text-3);
  font-size: 10.5px; font-weight: var(--fw-semibold);
  transition: color var(--dur-2), background var(--dur-2), transform var(--dur-1) var(--ease-emphasized); }
.tab .lucide { width: 22px; height: 22px; }
.tab:active { transform: scale(.88); }
.tab.is-active { color: var(--accent); background: color-mix(in srgb, var(--accent) 13%, transparent); }

/* ---- Toast + celebrate --------------------------------------------------- */
#toast { position: fixed; left: 50%; bottom: calc(var(--tabbar-h) + 28px); transform: translate(-50%, 18px);
  z-index: var(--z-toast); display: flex; align-items: center; gap: var(--s-2); max-width: 90vw;
  padding: 12px 18px; border-radius: var(--r-pill); font-size: var(--fs-callout); font-weight: var(--fw-semibold);
  background: var(--surface-3); color: var(--text); box-shadow: var(--shadow-3);
  opacity: 0; pointer-events: none; transition: opacity var(--dur-3) var(--ease-emphasized), transform var(--dur-3) var(--ease-emphasized); }
#toast.is-shown { opacity: 1; transform: translate(-50%, 0); }
#toast .lucide { width: 17px; height: 17px; color: var(--green); }

#celebrate { position: fixed; inset: 0; z-index: var(--z-celebrate); display: none; place-items: center; pointer-events: none; }
#celebrate.is-shown { display: grid; }
.celebrate-mark { width: 110px; height: 110px; border-radius: 50%; background: var(--green); display: grid; place-items: center;
  box-shadow: 0 18px 50px color-mix(in srgb, var(--green) 50%, transparent); animation: pop var(--dur-4) var(--ease-springy); }
.celebrate-mark .lucide { width: 56px; height: 56px; color: #fff; }
.confetti { position: absolute; width: 9px; height: 14px; border-radius: 3px; opacity: 0; }