:root{--color-ocean: #1565A0;--color-ocean-dark: #0D47A1;--color-bg: #0A2744;--color-bg-deep: #061A30;--color-surface: #0F3460;--color-card-bg: #F8F4E8;--color-card-bg-alt: #FFF9F0;--color-card-border: #C8A96E;--color-card-shadow: rgba(0, 0, 0, .4);--color-text-primary: #F0EBD8;--color-text-dark: #2C1810;--color-text-muted: #292420;--color-text-hint: #A09080;--color-accent: #D4843E;--color-accent-light: #E8A050;--color-btn: #B83A0A;--color-btn-hover: #8B2500;--color-btn-active: #6B1800;--color-toggle-on: #B83A0A;--color-toggle-off: #BBA88A;--radius-card: 14px;--radius-btn: 10px;--radius-sm: 6px;--shadow-card: 0 4px 20px var(--color-card-shadow);--shadow-board: 0 8px 32px rgba(0, 0, 0, .5), 0 2px 8px rgba(0, 0, 0, .3);--font-heading: "Georgia", "Times New Roman", serif;--font-body: "Segoe UI", system-ui, -apple-system, sans-serif;--transition-board: opacity .18s ease-in-out;--transition-btn: background .15s, transform .1s, box-shadow .15s;--transition-toggle: background .2s}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font-body);background-color:var(--color-bg);background-size:cover;background-position:center;background-attachment:fixed;color:var(--color-text-primary);min-height:100vh;line-height:1.5}ul{list-style:none}button{cursor:pointer;font-family:inherit}.app{display:flex;flex-direction:column;min-height:100vh;max-width:1280px;margin:0 auto;padding:0 1.25rem}.app-header{text-align:center;padding:1.5rem 0 .75rem}.app-title{font-family:var(--font-heading);font-size:clamp(1.6rem,4vw,2.6rem);color:var(--color-accent-light);text-shadow:0 2px 8px rgba(0,0,0,.6),0 1px 2px rgba(0,0,0,.4);letter-spacing:.02em}.app-subtitle{font-size:.85rem;color:var(--color-text-muted);margin-top:.3rem}.app-subtitle kbd{background:#ffffff1f;border:1px solid rgba(255,255,255,.2);border-radius:4px;padding:0 5px;font-size:.8em;font-family:var(--font-body);color:var(--color-text-primary)}.app-main{display:flex;flex-direction:row;gap:1.5rem;flex:1;align-items:flex-start;padding:.75rem 0 1rem}.board-section{flex:1 1 auto;min-width:0}.board-wrapper{background:transparent;border-radius:var(--radius-card);padding:.5rem;display:flex;align-items:center;justify-content:center}.board-svg{width:100%;height:auto;display:block;transition:var(--transition-board)}.controls-panel{flex:0 0 260px;display:flex;flex-direction:column;gap:1rem}.card{background:var(--color-card-bg);color:var(--color-text-dark);border-radius:var(--radius-card);border:1px solid var(--color-card-border);box-shadow:var(--shadow-card);padding:1.25rem}.card-title{font-family:var(--font-heading);font-size:1rem;font-weight:700;color:var(--color-text-dark);margin-bottom:.2rem}.card-hint{font-size:.74rem;color:var(--color-text-hint);margin-bottom:1rem}.shuffle-card{background:var(--color-card-bg-alt);text-align:center}.btn-shuffle{width:100%;padding:.85rem 1rem;background:var(--color-btn);color:#fff;border:none;border-radius:var(--radius-btn);font-size:1.05rem;font-weight:700;font-family:var(--font-heading);letter-spacing:.04em;box-shadow:0 3px 10px #b73a0a66,0 1px 3px #0003;transition:var(--transition-btn);display:flex;align-items:center;justify-content:center;gap:.5rem}.btn-shuffle:hover{background:var(--color-btn-hover);transform:translateY(-2px);box-shadow:0 5px 16px #b73a0a80,0 2px 6px #00000040}.btn-shuffle:active{transform:translateY(0);background:var(--color-btn-active);box-shadow:0 1px 4px #b73a0a4d}.btn-icon{font-size:1.2em;line-height:1;display:inline-block;transition:transform .3s ease}.btn-shuffle:active .btn-icon{transform:rotate(180deg)}.collapsible-title{cursor:pointer;-webkit-user-select:none;user-select:none;list-style:none;display:flex;align-items:center;justify-content:space-between}.collapsible-title::-webkit-details-marker{display:none}.collapsible-title:after{content:"▸";font-size:.85em;color:var(--color-text-hint);transition:transform .2s}details[open]>.collapsible-title:after{transform:rotate(90deg)}.constraint-list{display:flex;flex-direction:column;gap:.1rem}.constraint-item+.constraint-item{border-top:1px solid rgba(0,0,0,.06);padding-top:.1rem;margin-top:.1rem}.toggle-label{display:flex;align-items:flex-start;gap:.65rem;padding:.45rem 0;cursor:pointer;-webkit-user-select:none;user-select:none}.toggle-wrap{position:relative;flex-shrink:0;margin-top:2px}.toggle-input{position:absolute;opacity:0;width:0;height:0}.toggle-track{display:block;width:36px;height:20px;background:var(--color-toggle-off);border-radius:10px;transition:var(--transition-toggle);position:relative}.toggle-track:after{content:"";position:absolute;top:3px;left:3px;width:14px;height:14px;background:#fff;border-radius:50%;transition:transform .2s;box-shadow:0 1px 3px #0003}.toggle-input:checked+.toggle-track{background:var(--color-toggle-on)}.toggle-input:checked+.toggle-track:after{transform:translate(16px)}.toggle-input:focus-visible+.toggle-track{outline:2px solid var(--color-btn);outline-offset:2px}.toggle-text{display:flex;flex-direction:column;gap:1px;font-size:.86rem;color:var(--color-text-dark);line-height:1.3}.toggle-hint{font-size:.72rem;color:var(--color-text-hint);font-weight:400}.legend-list{display:grid;grid-template-columns:1fr 1fr;gap:.35rem .5rem;margin-bottom:.75rem}.legend-item{display:flex;align-items:center;gap:.4rem;font-size:.82rem;color:var(--color-text-dark)}.legend-swatch{display:inline-block;width:16px;height:16px;border-radius:3px;border:1px solid rgba(0,0,0,.18);flex-shrink:0}.legend-divider{height:1px;background:var(--color-card-border);opacity:.5;margin:.6rem 0}.legend-ports-note{font-size:.75rem;color:var(--color-text-muted);line-height:1.4}.app-footer{text-align:center;padding:.75rem 0 1rem;font-size:.74rem;color:var(--color-text-muted);border-top:1px solid rgba(255,255,255,.06);margin-top:auto}@media (max-width: 900px){.controls-panel{flex:0 0 230px}}@media (max-width: 700px){.app-main{flex-direction:column;align-items:stretch}.controls-panel{flex:none;width:100%}.board-section{order:2}.controls-panel{order:1}.app-main .controls-panel{display:grid;grid-template-columns:1fr 1fr;gap:.75rem}.shuffle-card{grid-column:1 / -1}.legend-list{grid-template-columns:1fr}}@media (max-width: 480px){.app-main .controls-panel{grid-template-columns:1fr}.app-title{font-size:1.4rem}}@media print{body{background:#fff;color:#000}.controls-panel,.app-header,.app-footer{display:none}.board-wrapper{box-shadow:none;border:1px solid #ccc}.app-main{padding:0}}