/* Big, high-contrast, simple. Designed for an 82-year-old on a large-text iPhone. */

:root{
  --bg:        #eef2f6;
  --card:      #ffffff;
  --ink:       #10202c;
  --ink-soft:  #41525e;
  --line:      #d4dde4;
  --blue:      #0b3d66;
  --blue-2:    #1466a8;
  --accent:    #1466a8;
  --hi:        #c4421f;   /* warm / high temp */
  --lo:        #1466a8;   /* cool / low temp  */
  --shadow:    0 2px 10px rgba(16,32,44,.08);
}

*{ box-sizing:border-box; }

html{ -webkit-text-size-adjust:100%; }

body{
  margin:0;
  font-family:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size:21px;
  line-height:1.4;
  color:var(--ink);
  background:var(--bg);
  overflow-x:hidden;            /* never scroll sideways */
  /* respect the iPhone notch / safe areas */
  padding:
    env(safe-area-inset-top)
    env(safe-area-inset-right)
    env(safe-area-inset-bottom)
    env(safe-area-inset-left);
}

/* ---------- top bar ---------- */
.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  background:var(--blue);
  color:#fff;
  padding:14px 16px;
  position:sticky;
  top:0;
  z-index:5;
}
.topbar h1{
  font-size:1.3rem;
  margin:0;
  font-weight:700;
  letter-spacing:.2px;
  /* shrink/ellipsis before ever shoving the button off-screen */
  min-width:0;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.refresh{
  appearance:none;
  flex:0 0 auto;               /* keep the whole button, never clip "Refresh" */
  border:2px solid rgba(255,255,255,.55);
  background:transparent;
  color:#fff;
  font-size:1rem;
  font-weight:600;
  padding:10px 14px;
  border-radius:12px;
  min-height:52px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  cursor:pointer;
}
.refresh:active{ background:rgba(255,255,255,.18); }
.refresh-icon{ font-size:1.4rem; line-height:1; display:inline-block; }
.refresh.spinning .refresh-icon{ animation:spin .8s linear infinite; }
@keyframes spin{ to{ transform:rotate(360deg); } }

main{ padding:18px 16px 40px; max-width:760px; margin:0 auto; }

/* ---------- cards ---------- */
.card{
  background:var(--card);
  border-radius:18px;
  box-shadow:var(--shadow);
  padding:16px;
  margin-bottom:22px;
}
.region{
  margin:2px 0 12px;
  font-size:1.3rem;
  color:var(--blue);
  font-weight:700;
}

/* ---------- chart ---------- */
.mode-toggle{
  display:flex;
  gap:4px;
  background:#e7edf2;
  border-radius:13px;
  padding:4px;
  margin-bottom:12px;
}
.mode-btn{
  flex:1;
  appearance:none;
  border:none;
  background:transparent;
  color:var(--ink-soft);
  font-size:1.05rem;
  font-weight:700;
  padding:12px 6px;
  min-height:52px;
  border-radius:10px;
  cursor:pointer;
}
.mode-btn.is-active{
  background:#fff;
  color:var(--blue);
  box-shadow:var(--shadow);
}

.chart-wrap{
  position:relative;
  background:#fff;
  border:1px solid var(--line);
  border-radius:12px;
  overflow:hidden;
  cursor:zoom-in;
  min-height:160px;
}
.layers{ position:relative; width:100%; }
.chart-img,
.layer-img{
  display:block;
  width:100%;
  height:auto;
  /* charts are crisp line art — keep edges sharp when scaled */
  image-rendering:-webkit-optimize-contrast;
}
.vlayer{ width:100%; }
.vlayer svg{ display:block; width:100%; height:auto; }
.chart-img.loading{ opacity:.25; }
.chart-status{
  position:absolute;
  inset:0;
  display:none;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding:24px;
  color:var(--ink-soft);
  font-size:1.1rem;
  background:rgba(255,255,255,.85);
}
.chart-status.show{ display:flex; }
.tap-hint{
  text-align:center;
  color:var(--ink-soft);
  font-size:.95rem;
  margin:8px 0 14px;
}

.frame-buttons{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:8px;
}
.frame-btn{
  appearance:none;
  border:2px solid var(--line);
  background:#f6f9fb;
  color:var(--ink);
  font-weight:700;
  padding:10px 4px;
  border-radius:12px;
  min-height:64px;
  cursor:pointer;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:2px;
  line-height:1.1;
}
.frame-btn .fb-main{ font-size:1.1rem; }
.frame-btn .fb-sub{ font-size:.8rem; font-weight:600; color:var(--ink-soft); }
.frame-btn:active{ transform:translateY(1px); }
.frame-btn.is-active{
  background:var(--blue);
  border-color:var(--blue);
  color:#fff;
}
.frame-btn.is-active .fb-sub{ color:rgba(255,255,255,.8); }

/* On phones, let the chart use the FULL screen width (edge to edge).
   The card breaks out of the page padding; only the text/buttons stay inset. */
@media (max-width:640px){
  .chart-card{
    margin-left:-16px;
    margin-right:-16px;
    padding-left:0;
    padding-right:0;
    border-radius:0;
  }
  .chart-card > .region,
  .chart-card > .mode-toggle,
  .chart-card > .tap-hint,
  .chart-card > .frame-buttons{
    padding-left:16px;
    padding-right:16px;
  }
  .chart-wrap{
    border-left:0;
    border-right:0;
    border-radius:0;
  }
}

/* ---------- weather ---------- */
.section-title{
  font-size:1.4rem;
  margin:18px 2px 14px;
  color:var(--ink);
}
.section-title .sub{
  font-size:.85rem;
  font-weight:600;
  color:var(--ink-soft);
}

/* ---------- tides ---------- */
.tides-card{
  background:var(--card);
  border-radius:16px;
  box-shadow:var(--shadow);
  overflow:hidden;
}
.tide-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:14px 16px;
  border-bottom:1px solid var(--line);
  font-size:1.15rem;
}
.tide-row:last-child{ border-bottom:none; }
.tide-type{ font-weight:800; flex:0 0 auto; min-width:5.4rem; }
.tide-row.hi .tide-type{ color:var(--hi); }
.tide-row.lo .tide-type{ color:var(--lo); }
.tide-when{ flex:1 1 auto; text-align:center; color:var(--ink-soft); font-weight:600; }
.tide-height{ flex:0 0 auto; font-weight:800; font-variant-numeric:tabular-nums; }
.tide-msg{ padding:16px; color:var(--ink-soft); }

/* ---------- world cities (compact) ---------- */
.world-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:10px;
}
@media (min-width:520px){
  .world-grid{ grid-template-columns:1fr 1fr; }
}
.ccard{
  display:flex;
  align-items:center;
  gap:12px;
  background:var(--card);
  border-radius:14px;
  box-shadow:var(--shadow);
  padding:12px 14px;
}
.cc-emoji{ font-size:2rem; line-height:1; width:2.2rem; text-align:center; flex:0 0 auto; }
.cc-body{ flex:1 1 auto; min-width:0; }
.cc-name{ font-size:1.2rem; font-weight:700; }
.cc-cond{ font-size:.95rem; color:var(--ink-soft); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.cc-temps{ flex:0 0 auto; font-size:1.3rem; font-weight:800; white-space:nowrap; }
.cc-temps .max{ color:var(--hi); }
.cc-temps .min{ color:var(--lo); margin-left:8px; }
.weather-grid{
  display:grid;
  gap:18px;
}
.wcard{
  background:var(--card);
  border-radius:18px;
  box-shadow:var(--shadow);
  padding:18px;
}
.wcard .city{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:8px;
  margin-bottom:6px;
}
.wcard .city-name{ font-size:1.45rem; font-weight:800; }
.wcard .city-tag{ font-size:.95rem; color:var(--ink-soft); font-weight:600; }

.wcard .now{
  display:flex;
  align-items:center;
  gap:14px;
  margin:6px 0 10px;
}
.wcard .emoji{ font-size:3.4rem; line-height:1; }
.wcard .temp{ font-size:3.4rem; font-weight:800; letter-spacing:-1px; }
.wcard .cond{ font-size:1.2rem; font-weight:600; color:var(--ink); }

.wcard .detail{
  display:flex;
  flex-wrap:wrap;
  gap:6px 22px;
  color:var(--ink-soft);
  font-size:1.05rem;
  margin-bottom:14px;
}
.wcard .detail b{ color:var(--ink); font-weight:700; }

.forecast{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:8px;
  border-top:1px solid var(--line);
  padding-top:12px;
}
.fday{ text-align:center; }
.fday .dow{ font-size:1rem; color:var(--ink-soft); font-weight:700; }
.fday .femoji{ font-size:1.8rem; }
.fday .frange{ font-size:1.05rem; font-weight:700; }
.fday .frange .max{ color:var(--hi); }
.fday .frange .min{ color:var(--lo); }

.wcard.error{ color:var(--ink-soft); }
.wcard .retry{
  margin-top:10px;
  appearance:none;
  border:2px solid var(--line);
  background:#f6f9fb;
  font-size:1rem;
  font-weight:700;
  padding:10px 16px;
  border-radius:10px;
  min-height:48px;
  cursor:pointer;
}

/* ---------- footer ---------- */
.updated{ text-align:center; color:var(--ink-soft); font-size:1rem; margin:24px 0 4px; }
.credit{ text-align:center; color:var(--ink-soft); font-size:.85rem; margin:0; }
.build-tag{ opacity:.65; }

/* ---------- fullscreen viewer ---------- */
.viewer{
  position:fixed;
  inset:0;
  z-index:50;
  background:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:auto;
}
/* `hidden` must win over the flex display above */
.viewer[hidden]{ display:none; }
.viewer-body{
  width:100%;
  height:100%;
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:auto;
}
.viewer-img{
  max-width:100%;
  height:auto;
  /* let the user pinch-zoom the chart for detail */
  touch-action:pinch-zoom;
}
.viewer-svg{
  width:100%;
  max-width:100%;
  height:auto;
}
.viewer-close{
  position:fixed;
  top:calc(env(safe-area-inset-top) + 10px);
  right:14px;
  width:60px;
  height:60px;
  border-radius:50%;
  border:none;
  background:var(--blue);
  color:#fff;
  font-size:2.2rem;
  line-height:1;
  cursor:pointer;
  z-index:51;
  box-shadow:var(--shadow);
}

@media (min-width:640px){
  .weather-grid{ grid-template-columns:1fr 1fr; }
}