/* WAGO simulator web UI — DIN-rail node graphics (no build step). */

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: #e9ecef;
  color: #1c2733;
}

/* ---------- login ---------- */

.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(160deg, #003a7a, #0062c4);
}
.login-card {
  background: #fff;
  border-radius: 8px;
  padding: 34px 40px;
  width: 320px;
  text-align: center;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.35);
}
.login-card h1 { font-size: 1.25rem; margin: 10px 0 0; }
.login-sub { color: #6b7684; margin-top: 2px; font-size: 0.85rem; }
.login-card form { display: flex; flex-direction: column; gap: 14px; margin-top: 18px; text-align: left; }
.login-card label { font-size: 0.85rem; color: #3c4653; }
.login-card input {
  width: 100%; padding: 9px 10px; border: 1px solid #c5ccd4;
  border-radius: 4px; font-size: 1rem; margin-top: 4px;
}
.login-card button {
  padding: 10px; border: 0; border-radius: 4px; background: #0062c4;
  color: #fff; font-size: 1rem; cursor: pointer;
}
.login-card button:hover { background: #004a99; }
.error { color: #b3261e; font-size: 0.85rem; }
.hidden { display: none; }

/* ---------- top bar ---------- */

.topbar {
  display: flex; align-items: center; gap: 22px;
  background: #003a7a; color: #fff;
  padding: 8px 18px;
}
.brand { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.tabs { display: flex; gap: 4px; }
.tab {
  border: 0; background: transparent; color: #cfe0f5;
  padding: 7px 14px; border-radius: 4px; cursor: pointer; font-size: 0.95rem;
}
.tab.active { background: #0062c4; color: #fff; }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
.logout { color: #cfe0f5; text-decoration: none; font-size: 0.9rem; }
.conn-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: #d9534f; display: inline-block;
}
.conn-dot.on { background: #4caf50; box-shadow: 0 0 6px #4caf50; }

main { padding: 18px; max-width: 1280px; margin: 0 auto; }
h2 { margin: 4px 0 14px; }
.tab-page { display: none; }
.tab-page.active { display: block; }

/* ---------- DIN rail ---------- */

.rail {
  display: flex; align-items: stretch; gap: 6px;
  background: linear-gradient(#d7dde3, #b7c0c9);
  border-radius: 4px;
  padding: 26px 12px 12px;
  min-height: 130px;
  overflow-x: auto;
  box-shadow: inset 0 -3px 6px rgba(0, 0, 0, 0.18);
}
.coupler, .module {
  background: linear-gradient(#fdfdfd, #dfe3e8);
  border: 1px solid #9aa4ae;
  border-radius: 3px;
  min-height: 92px;
  position: relative;
  padding-top: 16px;
}
.module {
  /* label stacks (LED + code, or code + lim LEDs + bar + num) are
     taller than the bare indicators; keep the rail visually even */
  min-height: 124px;
  flex-shrink: 0;   /* keep the computed width — do not squeeze rows */
}
.mod-head {
  position: absolute; top: 2px; left: 5px;
  font-size: 0.62rem; color: #33414f; font-weight: 600;
  letter-spacing: 0.02em; white-space: nowrap;
}
.mod-designation {
  /* kind+slot designation (DI0, DO2, AI4) — module's lower left
     corner, below the channel indicators (FR-10.2.2) */
  position: absolute; bottom: 3px; left: 5px;
  font-size: 0.62rem; color: #33414f; font-weight: 600;
  letter-spacing: 0.02em; line-height: 1;
}
.coupler { min-width: 96px; background: linear-gradient(#0d5db4, #003a7a); }
.coupler .mod-head { color: #fff; font-size: 0.75rem; }
.coupler-leds { display: flex; gap: 7px; padding: 42px 10px 0; }
.cled {
  width: 8px; height: 8px; border-radius: 50%;
  background: #123; box-shadow: none;
}
.cled.on {
  background: #4caf50;
  box-shadow: 0 0 7px 2px rgba(76, 175, 80, 0.85);
}
.module {
  /* thin, tall bezel: the module's channel columns sit side by side */
  flex-shrink: 0;   /* keep the computed width — do not squeeze rows */
  display: flex;
  flex-direction: row;
  align-items: flex-end;
  justify-content: flex-start;
}
/* digital modules: tall enough for 8 vertically stacked LEDs + labels */
.module:has(.mod-channels-v) { min-height: 248px; }
.module { min-height: 124px; }
.mod-channels {
  display: flex; gap: 5px; flex-wrap: wrap; align-items: flex-end;
  padding: 8px 6px 16px;   /* bottom room for the designation label */
}
/* vertical digital columns: LEDs stacked top-to-bottom, 8 per column */
.mod-channels-v {
  flex-direction: column;
  flex-wrap: nowrap;
  align-items: center;
  padding: 20px 4px 16px;  /* top room for the article header */
  gap: 4px;
}
.row-break {
  /* legacy two-row layout marker — vertical columns replace it */
  display: none;
}

/* DI/DO LED cells with channel-number labels (FR-10.2.2) */
.led-cell {
  display: inline-flex; flex-direction: column;
  align-items: center; gap: 2px; cursor: pointer;
}
.led-label {
  font-size: 0.55rem; color: #33414f;
  font-family: Consolas, monospace;
  white-space: nowrap; line-height: 1;
}

/* channel LEDs */
.led {
  width: 12px; height: 12px; border-radius: 50%;
  background: #2c3742;
  border: 1px solid #1b232c;
  cursor: pointer;
  transition: box-shadow 0.12s, background 0.12s;
}
.led.on {
  background: #37e04d;
  border-color: #2ab63a;
  box-shadow: 0 0 9px 2px rgba(70, 230, 80, 0.8);
}

/* analog bars (FR-10.2.14: range-scaled vertical fill + limit LEDs) */
.abar-cell {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 1px;
  cursor: pointer;
}
.abar-label {
  font-size: 0.55rem; color: #33414f;
  font-family: Consolas, monospace;
  white-space: nowrap; line-height: 1;
}
.abar {
  position: relative;
  width: 16px; height: 48px;
  background: #232c36;
  border-radius: 3px;
  overflow: hidden;          /* clip the fill inside the rounded bar */
  display: inline-block;
  cursor: pointer;           /* clickable: sets value at click height */
}
.abar-fill {
  position: absolute; bottom: 0; left: 0; right: 0; height: 0%;
  background: linear-gradient(#4db6ff, #0d6eb4);
  border-radius: 0 0 3px 3px;
  transition: height 0.15s;
}
.abar-fill.limit {          /* under/overflow: red limit fill */
  background: linear-gradient(#ff6b5e, #c62828);
}
.lim-led {
  width: 8px; height: 4px;
  border-radius: 2px;
  background: #3a2b2b;
}
.lim-led.lim-over { order: 0; }   /* directly above the bar */
.lim-led.lim-under { order: 2; }  /* directly below the bar */
.abar-label.top-label { order: -1; }  /* I/O code above the overflow LED */
.abar-label.bottom-label { order: 3; } /* I/O code below the underflow LED */
.abar { order: 1; }
.abar-num {
  order: 4;
  font-size: 0.55rem; color: #33414f; white-space: nowrap;
}
.lim-led.on {
  background: #ff3b30;
  box-shadow: 0 0 6px 1px rgba(255, 59, 48, 0.8);
}
.rail-detail { margin-top: 10px; font-size: 0.8rem; color: #55606c; }

/* ---------- diagnostics ---------- */

.diag-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; }
.diag-card {
  background: #fff; border-radius: 6px; padding: 14px 18px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}
.diag-card h3 { margin: 0 0 10px; font-size: 1rem; }
.diag-card table { border-collapse: collapse; width: 100%; font-size: 0.88rem; }
.diag-card td { padding: 4px 6px; border-bottom: 1px solid #eef1f4; }
.diag-card td:last-child { text-align: right; font-family: Consolas, monospace; }
.diag-card button {
  margin-top: 12px; padding: 7px 14px; border: 0; border-radius: 4px;
  background: #0062c4; color: #fff; cursor: pointer;
}
.diag-card button:hover { background: #004a99; }
.fault-buttons { display: flex; gap: 8px; }

/* ---------- configuration ---------- */

.config-grid { display: grid; grid-template-columns: minmax(320px, 1fr) minmax(380px, 1.4fr); gap: 16px; align-items: start; }
.cfg-note { color: #6b7684; font-size: 0.8rem; margin: 0 0 12px; }
#coupler-form { display: flex; flex-direction: column; gap: 10px; }
.cfg-field { font-size: 0.85rem; color: #3c4653; display: flex; flex-direction: column; gap: 3px; }
.cfg-field input, .cfg-field select {
  padding: 7px 8px; border: 1px solid #c5ccd4; border-radius: 4px;
  font-size: 0.9rem; width: 100%;
}
.cfg-check { font-size: 0.85rem; display: flex; gap: 8px; align-items: center; }
.ok { color: #2e7d32; font-size: 0.85rem; }
#module-list { display: flex; flex-direction: column; gap: 4px; max-height: 340px; overflow-y: auto; margin-bottom: 10px; }
.module-row {
  display: flex; align-items: center; gap: 8px;
  padding: 5px 8px; border: 1px solid #d8dee5; border-radius: 4px;
  font-size: 0.85rem; cursor: pointer; background: #f7f9fb;
}
.module-row:hover { background: #eaf1f8; }
.mod-io { color: #55606c; margin-left: auto; font-size: 0.78rem; white-space: nowrap; }
#catalog-pick { padding: 6px; border: 1px solid #c5ccd4; border-radius: 4px; flex: 1; }
.cfg-path { font-size: 0.75rem; color: #6b7684; align-self: center; }
button.primary { background: #2e7d32; }
button.primary:hover { background: #1b5e20; }

/* ---------- channel list (FR-10.2.13) ---------- */

.list-title { margin: 22px 0 8px; }
.chlist-head, .chlist-row {
  display: grid;
  grid-template-columns: 70px 1fr 90px;
  gap: 10px;
  align-items: center;
}
.chlist-head {
  font-size: 0.72rem; text-transform: uppercase; color: #6b7684;
  letter-spacing: 0.06em;
  padding: 0 10px 4px;
}
.chlist {
  max-height: 420px;
  overflow-y: auto;
  border: 1px solid #d8dee5;
  border-radius: 6px;
  background: #fff;
}
.chlist-row { padding: 4px 10px; border-bottom: 1px solid #eef1f4; }
.chlist-row:last-child { border-bottom: 0; }
.chlist-row:hover { background: #f2f6fa; }
.row-io {
  font-family: Consolas, monospace; font-size: 0.82rem;
  color: #004a99; font-weight: 600;
}
.row-name { font-size: 0.85rem; overflow: hidden; text-overflow: ellipsis; }
.row-name.unnamed { color: #9aa4ae; }
.row-value.num {
  width: 100%; padding: 4px 6px; border: 1px solid #c5ccd4;
  border-radius: 4px; font-family: Consolas, monospace; font-size: 0.85rem;
}

/* toggle switch */
.switch { position: relative; display: inline-block; width: 40px; height: 22px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider {
  position: absolute; inset: 0; background: #b9c2cb;
  border-radius: 22px; transition: 0.15s; cursor: pointer;
}
.slider::before {
  content: ""; position: absolute; width: 16px; height: 16px;
  left: 3px; top: 3px; background: #fff; border-radius: 50%;
  transition: 0.15s;
}
.switch input:checked + .slider { background: #37b34a; }
.switch input:checked + .slider::before { transform: translateX(18px); }

/* ---------- channel-name editor ---------- */

.name-editor { max-height: 300px; overflow-y: auto; margin-bottom: 10px; }
.name-row {
  display: grid; grid-template-columns: 70px 1fr; gap: 8px;
  align-items: center; padding: 2px 0;
}
.name-input {
  padding: 5px 8px; border: 1px solid #c5ccd4; border-radius: 4px;
  font-size: 0.85rem; width: 100%;
}
.range-row {
  display: grid; grid-template-columns: 70px 1fr; gap: 8px;
  align-items: center; padding: 2px 0;
}
.range-fields { display: flex; align-items: center; gap: 6px; }
.range-fields input {
  width: 90px; padding: 5px 8px; border: 1px solid #c5ccd4;
  border-radius: 4px; font-size: 0.85rem;
  font-family: Consolas, monospace;
}
.range-sep { color: #6b7684; }
.hidden-file { display: none; }
#cfg-io-buttons { display: flex; gap: 8px; margin-top: 8px; }