/* ==========================================================================
   stopping.css — Ship Stopping (Crash Astern / Crash Stop)
   App-specific styles only. Relies on the shared
   variables.css / reset.css / nav.css / footer.css.
   ========================================================================== */

:root {
  --teal:    #4ed0e1;
  --purple:  #a78bfa;
  --red:     #fb7185;
  --success: #22c55e;
  --danger:  #ef4444;
  --phase1:  #c8a84b;   /* thrust reducing — amber */
  --phase2:  #fb7185;   /* full astern — coral/red */
  --imo-ok:  #22c55e;   /* within IMO limit */
  --imo-ng:  #ef4444;   /* exceeds IMO limit */
}

body {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}
nav { flex-shrink: 0; }
.divider { flex-shrink: 0; }
footer.footer { flex-shrink: 0; }

.app-workspace {
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
  padding: 1.25rem 2rem;
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 2rem;
  flex: 1 1 0;
  min-height: 0;
  overflow: hidden;
  box-sizing: border-box;
}

/* ==========================================================================
   LEFT CONTROL PANEL
   ========================================================================== */
.control-panel {
  background: var(--navy-mid);
  border: 1px solid rgba(200, 168, 75, 0.2);
  display: flex;
  flex-direction: column;
  height: 100%;
  box-sizing: border-box;
  overflow-y: auto;
  overflow-x: hidden;
  min-height: 0;
}
.control-panel::-webkit-scrollbar { width: 5px; }
.control-panel::-webkit-scrollbar-track { background: transparent; }
.control-panel::-webkit-scrollbar-thumb { background: rgba(200, 168, 75, 0.25); }

.panel-header {
  padding: 1.5rem 1.75rem 1.1rem;
  border-bottom: 1px solid rgba(200, 168, 75, 0.15);
  flex-shrink: 0;
}
.panel-badge {
  display: block;
  font-family: monospace;
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--teal);
  margin-bottom: 0.35rem;
}
.panel-title {
  font-family: 'Playfair Display', serif;
  font-size: 22px;
  color: var(--white);
  font-weight: normal;
  line-height: 1.2;
  margin: 0;
}

.input-section {
  padding: 1.05rem 1.75rem;
  border-bottom: 1px solid rgba(200, 168, 75, 0.08);
}

.section-label {
  font-family: monospace;
  font-size: 9.5px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--amber);
  margin-bottom: 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(200, 168, 75, 0.15);
}

/* Sliders */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: 0.95rem;
}
.input-group:last-child { margin-bottom: 0; }

.input-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--amber);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.input-val {
  color: var(--white);
  font-family: monospace;
  font-size: 12px;
  font-weight: bold;
}

.range-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  background: var(--navy-light);
  border: 1px solid rgba(200, 168, 75, 0.1);
  outline: none;
  cursor: pointer;
}
.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 14px; height: 14px;
  background: var(--amber);
  border: 1px solid var(--white);
  cursor: pointer;
  transition: transform 0.1s;
}
.range-slider::-webkit-slider-thumb:hover { transform: scale(1.2); }

.slider-hint {
  font-family: monospace;
  font-size: 9.5px;
  color: var(--muted);
  letter-spacing: 0.3px;
  margin-top: 0.15rem;
}

/* Compact grid for hull constants & coefficients */
.coef-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem 0.55rem;
}
.coef-grid--3 { grid-template-columns: 1fr 1fr 1fr; }

.coef-input {
  display: flex;
  flex-direction: column;
  gap: 0.18rem;
  min-width: 0;
}
.coef-input label {
  font-family: monospace;
  font-size: 9.5px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--muted);
}
.coef-input label sub { font-size: 8px; color: var(--muted); }
.coef-input input {
  width: 100%;
  background: rgba(10, 22, 40, 0.7);
  border: 1px solid rgba(200, 168, 75, 0.15);
  color: var(--amber-light);
  font-family: monospace;
  font-size: 11px;
  padding: 0.32rem 0.45rem;
  outline: none;
  transition: border-color 0.15s, background 0.15s;
  box-sizing: border-box;
}
.coef-input input:hover  { border-color: rgba(200, 168, 75, 0.35); }
.coef-input input:focus  {
  border-color: var(--amber);
  background: rgba(10, 22, 40, 0.95);
  color: var(--white);
}
.coef-input input::-webkit-outer-spin-button,
.coef-input input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.coef-input input[type=number] { -moz-appearance: textfield; }

/* Collapsible groups */
.input-section--collapsible .section-label--clickable {
  cursor: pointer;
  user-select: none;
}
.input-section--collapsible .section-label--clickable:hover { color: var(--amber-light); }
.grp-chevron {
  font-size: 11px;
  color: var(--amber);
  transition: transform 0.2s;
}
.input-section--collapsible.collapsed .grp-chevron { transform: rotate(-90deg); }
.input-section--collapsible.collapsed .coef-grid  { display: none; }

/* Constants note */
.constants-note {
  margin-top: 0.85rem;
  padding: 0.55rem 0.7rem;
  background: rgba(78, 208, 225, 0.06);
  border-left: 2px solid var(--teal);
  font-family: monospace;
  font-size: 9.5px;
  color: var(--muted);
  letter-spacing: 0.3px;
  line-height: 1.5;
}

/* 2-column constant tiles */
.constants-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 0.55rem;
}
.constants-row--2 { grid-template-columns: 1fr 1fr; }
.const-block {
  background: rgba(10, 22, 40, 0.6);
  border: 1px solid rgba(200, 168, 75, 0.1);
  border-left: 2px solid var(--phase1);
  padding: 0.55rem 0.7rem;
  min-width: 0;
}
.const-block--p1 { border-left-color: var(--phase1); }
.const-block--p2 { border-left-color: var(--phase2); }

.const-val {
  font-family: monospace;
  font-size: 14px;
  color: var(--white);
  font-weight: bold;
  display: block;
  margin-bottom: 0.15rem;
}
.const-label {
  font-family: monospace;
  font-size: 8.5px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--muted);
  display: block;
}

/* Run button */
.run-section { padding: 1.25rem 1.75rem; }
.btn-run {
  width: 100%;
  background: var(--amber);
  color: var(--navy-dark);
  border: none;
  padding: 0.9rem 1rem;
  font-family: monospace;
  font-weight: bold;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 2px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-run:hover         { background: var(--white); color: var(--navy-dark); }
.btn-run:active        { transform: scale(0.98); }
.btn-run.is-loading    {
  background: rgba(200, 168, 75, 0.4);
  color: var(--navy-dark);
  cursor: wait;
}

/* Telemetry */
.telemetry-wrapper {
  margin-top: auto;
  padding: 1rem 1.75rem 1.1rem;
  background: rgba(6, 13, 24, 0.5);
  border-top: 1px solid rgba(200, 168, 75, 0.15);
  flex-shrink: 0;
}
.telemetry-title { margin-bottom: 0.6rem; }
.telemetry-deck {
  background: rgba(10, 22, 40, 0.6);
  border: 1px solid rgba(200, 168, 75, 0.1);
  padding: 0.9rem 1.1rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.55rem;
}
.telemetry-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}
.telemetry-label {
  color: var(--muted);
  font-family: monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.telemetry-val {
  font-family: monospace;
  font-size: 13px;
  color: var(--amber-light);
  font-weight: bold;
}
.telemetry-val.error-state { color: var(--danger); }
.telemetry-val--p1         { color: var(--phase1); }
.telemetry-val--p2         { color: var(--phase2); }

/* IMO verdict styling */
.quality-row {
  border-top: 1px solid rgba(200, 168, 75, 0.2);
  padding-top: 0.55rem;
  margin-top: 0.2rem;
}
.highlight-text { color: var(--amber); }
.quality-val { font-size: 13.5px; }
.quality-val.excellent  { color: var(--success); }
.quality-val.acceptable { color: var(--amber); }
.quality-val.poor       { color: var(--danger); }

.api-status-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 0.75rem;
}
.api-status {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: monospace;
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--muted);
}
.status-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--muted);
  transition: background 0.3s, box-shadow 0.3s;
  flex-shrink: 0;
}
.status-dot.ok      { background: var(--success); box-shadow: 0 0 7px var(--success); }
.status-dot.err     { background: var(--danger);  box-shadow: 0 0 7px var(--danger); }
.status-dot.loading { background: var(--amber);   animation: statusPulse 0.9s infinite; }
@keyframes statusPulse { 0%,100%{opacity:1} 50%{opacity:0.3} }

.hud-inline { font-family: monospace; font-size: 9px; color: var(--muted); letter-spacing: 0.5px; }
.hud-inline span { color: var(--amber-light); font-weight: bold; }

/* ==========================================================================
   NAV VIEW-SWITCHER CLUSTER
   ========================================================================== */
.nav-controls-cluster { display: flex; align-items: center; gap: 1rem; }
.cad-toggle-wrapper {
  display: flex;
  background: rgba(10, 22, 40, 0.8);
  border: 1px solid rgba(200, 168, 75, 0.3);
  padding: 2px;
}
.btn-switch-view {
  background: transparent;
  border: none;
  color: var(--muted, #94a3b8);
  padding: 0.4rem 1rem;
  font-family: monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.btn-switch-view.active-view {
  background: var(--amber, #c8a84b);
  color: var(--navy-dark, #060d18);
  font-weight: bold;
}
.btn-switch-view:hover:not(.active-view) {
  color: var(--white, #fff);
  background: rgba(200, 168, 75, 0.15);
}

/* ==========================================================================
   RIGHT VIEWPORT
   ========================================================================== */
.workspace-right { display: flex; flex-direction: column; min-height: 0; }
.split-viewport-container {
  display: flex;
  flex-direction: row;
  flex: 1 1 0;
  min-height: 0;
  width: 100%;
}
.viewport-container {
  background: #060d18;
  border: 1px solid rgba(200, 168, 75, 0.15);
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.chart-panel.is-hidden,
.visualizer-panel.is-hidden,
.table-panel.is-hidden { display: none !important; }

.cad-toolbar {
  background: rgba(10, 22, 40, 0.85);
  border-bottom: 1px solid rgba(200, 168, 75, 0.15);
  padding: 0.7rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 10;
  flex-shrink: 0;
}
.cad-actions { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }

.cad-btn {
  background: rgba(200, 168, 75, 0.05);
  border: 1px solid rgba(200, 168, 75, 0.3);
  color: var(--white);
  padding: 0.4rem 0.8rem;
  font-size: 11px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s, border-color 0.15s;
  white-space: nowrap;
}
.cad-btn:hover { background: rgba(200, 168, 75, 0.15); border-color: var(--amber); }

.cad-select {
  background: rgba(10, 22, 40, 0.9);
  border: 1px solid rgba(200, 168, 75, 0.3);
  color: var(--white);
  padding: 0.4rem 0.6rem;
  font-size: 11px;
  font-family: inherit;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s;
}
.cad-select:hover { border-color: var(--amber); }

.aspect-ratio-hud,
.chart-title-hud {
  font-family: monospace;
  font-size: 11px;
  color: var(--muted);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.aspect-ratio-hud span { color: var(--amber-light); font-weight: bold; }

/* Canvas */
.canvas-wrap { position: relative; flex: 1; min-height: 0; }
#canvas-3d-target {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  cursor: grab;
}
#canvas-3d-target:active { cursor: grabbing; }

#plot-target {
  width: 100%;
  flex: 1;
  min-height: 0;
  background: #060d18;
}

/* Loading */
.loading-overlay {
  position: absolute;
  inset: 0;
  background: rgba(6, 13, 24, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 30;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}
.loading-overlay.active { opacity: 1; }
.loading-spinner {
  width: 34px; height: 34px;
  border: 2px solid rgba(200, 168, 75, 0.2);
  border-top-color: var(--amber);
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Trajectory legend */
.trajectory-legend {
  position: absolute;
  bottom: 14px;
  left: 14px;
  background: rgba(6, 13, 24, 0.78);
  border: 1px solid rgba(200, 168, 75, 0.2);
  padding: 0.65rem 0.85rem;
  font-family: monospace;
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.3px;
  display: flex;
  flex-direction: column;
  gap: 0.34rem;
  pointer-events: none;
  z-index: 20;
}
.leg-row { display: flex; align-items: center; gap: 0.5rem; }

.leg-dot {
  width: 9px; height: 9px;
  border-radius: 50%;
  flex-shrink: 0;
}
.leg-dot--start { background: var(--success); box-shadow: 0 0 8px var(--success); }
.leg-dot--final { background: var(--phase2);  box-shadow: 0 0 6px var(--phase2); }

.leg-line {
  width: 18px; height: 2px;
  flex-shrink: 0;
}
.leg-line--p1 { background: var(--phase1); box-shadow: 0 0 5px var(--phase1); }
.leg-line--p2 { background: var(--phase2); box-shadow: 0 0 5px var(--phase2); }

/* ==========================================================================
   DATA TABLE PANEL
   ========================================================================== */
#table-target {
  width: 100%;
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  padding: 1.25rem;
  background: #060d18;
  box-sizing: border-box;
}
#table-target::-webkit-scrollbar { width: 6px; }
#table-target::-webkit-scrollbar-track { background: rgba(10, 22, 40, 0.5); }
#table-target::-webkit-scrollbar-thumb { background: rgba(200, 168, 75, 0.3); }

.tbl-block {
  background: rgba(10, 22, 40, 0.6);
  border: 1px solid rgba(200, 168, 75, 0.15);
  padding: 1rem 1.1rem;
}
.tbl-title {
  font-family: monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--amber);
  margin: 0 0 0.75rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(200, 168, 75, 0.2);
  font-weight: bold;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11.5px;
  color: var(--white);
}
.data-table thead th {
  font-family: monospace;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 10px;
  color: var(--amber);
  text-align: right;
  padding: 0.45rem 0.55rem;
  border-bottom: 1px solid rgba(200, 168, 75, 0.3);
  background: rgba(200, 168, 75, 0.05);
  font-weight: 600;
  position: sticky;
  top: 0;
  z-index: 2;
}
.data-table thead th:first-child { text-align: left; }
.data-table tbody td {
  padding: 0.35rem 0.55rem;
  border-bottom: 1px solid rgba(200, 168, 75, 0.08);
  text-align: right;
  font-family: monospace;
  color: var(--amber-light);
  font-size: 11px;
}
.data-table tbody td:first-child { text-align: left; color: var(--muted); }
.data-table tbody tr:nth-child(even) { background: rgba(10, 22, 40, 0.4); }
.data-table tbody tr:hover td { background: rgba(200, 168, 75, 0.08); }

/* Phase row colouring */
.data-table tbody tr.phase-1 td:first-child { color: var(--phase1); }
.data-table tbody tr.phase-2 td:first-child { color: var(--phase2); }

.data-table-empty {
  text-align: center;
  color: var(--muted);
  padding: 3rem 1rem;
  font-size: 13px;
  font-family: monospace;
}

/* ==========================================================================
   THEORY OVERLAY
   ========================================================================== */
.theory-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  background: rgba(6, 13, 24, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}
.theory-overlay.active { opacity: 1; pointer-events: auto; visibility: visible; }

.theory-modal {
  background: var(--navy-mid);
  border: 1px solid rgba(200, 168, 75, 0.25);
  width: 92%;
  max-width: 1160px;
  max-height: 85vh;
  padding: 3.5rem;
  position: relative;
  overflow-y: auto;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.8);
  box-sizing: border-box;
}
.theory-modal::-webkit-scrollbar { width: 6px; }
.theory-modal::-webkit-scrollbar-track { background: var(--navy-dark); }
.theory-modal::-webkit-scrollbar-thumb { background: rgba(200, 168, 75, 0.3); }

.theory-close {
  position: absolute;
  top: 1.5rem; right: 2rem;
  background: transparent;
  border: 1px solid rgba(200, 168, 75, 0.3);
  color: var(--amber);
  padding: 0.5rem 1.25rem;
  cursor: pointer;
  font-family: monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all 0.2s ease;
}
.theory-close:hover { background: var(--amber); color: var(--navy-dark); border-color: var(--amber); }

.theory-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  margin-top: 1rem;
}
.theory-tag {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--amber);
  display: block;
  margin-bottom: 0.5rem;
  font-weight: bold;
}
.theory-left h2, .theory-right h2 {
  font-family: 'Playfair Display', serif;
  color: var(--white);
  font-size: 28px;
  margin-bottom: 0.75rem;
  font-weight: normal;
  line-height: 1.25;
}
.theory-meta {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 1.75rem;
  letter-spacing: 0.5px;
}
.theory-left p, .theory-right p {
  font-size: 14px;
  line-height: 1.65;
  color: rgba(255,255,255,0.85);
  margin-bottom: 1.25rem;
}
.theory-left h3 {
  font-family: 'Playfair Display', serif;
  color: var(--white);
  font-size: 18px;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.equation-box {
  background: rgba(10, 22, 40, 0.6);
  border-left: 3px solid var(--amber);
  padding: 1.5rem;
  margin: 1.75rem 0;
}
.eq-title {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--muted);
  margin-bottom: 0.75rem;
}
.eq-math {
  font-family: 'Courier New', Courier, monospace;
  font-size: 18px;
  color: var(--white);
  font-weight: bold;
  margin-bottom: 0.75rem;
  letter-spacing: 0.5px;
}
.equation-box p      { font-size: 12px; color: var(--muted); margin-bottom: 0; line-height: 1.5; }
.equation-box strong { color: var(--amber-light); }

.component-cards { display: grid; grid-template-columns: 1fr; gap: 0.65rem; margin-bottom: 1.25rem; }
.component-card {
  background: rgba(10, 22, 40, 0.6);
  border: 1px solid rgba(200, 168, 75, 0.1);
  padding: 0.85rem 1rem;
}
.component-head { display: flex; align-items: center; gap: 0.7rem; margin-bottom: 0.4rem; }
.component-head strong { font-family: monospace; font-size: 13px; color: var(--white); }
.component-card > p { font-size: 12px; color: var(--muted); line-height: 1.55; margin-bottom: 0; }

.comp-tag {
  font-family: monospace;
  font-size: 8.5px;
  text-transform: uppercase;
  letter-spacing: 1px;
  padding: 2px 7px;
  font-weight: bold;
}
.comp-tag--teal   { background: rgba(78,208,225,0.12); color: var(--teal);    border: 1px solid rgba(78,208,225,0.3); }
.comp-tag--amber  { background: rgba(200,168,75,0.1);  color: var(--amber);   border: 1px solid rgba(200,168,75,0.3); }
.comp-tag--red    { background: rgba(251,113,133,0.1); color: var(--red);     border: 1px solid rgba(251,113,133,0.3); }
.comp-tag--green  { background: rgba(34,197,94,0.1);   color: var(--success); border: 1px solid rgba(34,197,94,0.3); }

.tutorial-step { display: flex; gap: 1.25rem; margin-bottom: 1.75rem; align-items: flex-start; }
.step-num {
  background: rgba(200, 168, 75, 0.08);
  border: 1px solid rgba(200, 168, 75, 0.4);
  color: var(--amber);
  width: 34px; height: 34px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: monospace; font-weight: bold; font-size: 14px;
  flex-shrink: 0;
}
.step-text h4 { color: var(--white); font-size: 14px; margin-bottom: 0.35rem; font-weight: bold; letter-spacing: 0.5px; }
.step-text p  { font-size: 13px; color: var(--muted); line-height: 1.6; margin-bottom: 0; }

.theory-start-btn {
  width: 100%;
  background: var(--amber);
  color: var(--navy-dark);
  border: none;
  padding: 1.15rem;
  font-weight: bold;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  cursor: pointer;
  margin-top: 1.5rem;
  transition: all 0.2s ease;
}
.theory-start-btn:hover { background: var(--white); color: var(--navy-dark); }

@media (max-width: 1024px) {
  .theory-grid { grid-template-columns: 1fr; gap: 3rem; }
  .theory-modal { padding: 2rem; max-height: 90vh; }
}