:root{--chain-card-bg: var(--color-surface);--chain-card-bg-hover: rgba(26, 26, 26, .8);--chain-card-border: var(--color-border);--chain-card-border-hover: #000000;--status-active: #4caf50;--status-active-glow: rgba(76, 175, 80, .2);--status-completed: #2196f3;--status-completed-glow: rgba(33, 150, 243, .2);--status-archived: #9e9e9e;--status-archived-glow: rgba(158, 158, 158, .2);--status-destroyed: #f44336;--status-destroyed-glow: rgba(244, 67, 54, .2);--status-pending: #ff9800;--status-pending-glow: rgba(255, 152, 0, .2);--chain-linear: #000000;--chain-branching: #9c27b0;--chain-network: #ff5722;--timeline-line: var(--color-border);--timeline-marker-bg: #000000;--timeline-marker-text: var(--color-bg);--modal-backdrop: rgba(10, 10, 10, .85);--modal-content-bg: var(--color-surface);--modal-border: var(--color-border);--checkpoint-bg: rgba(26, 26, 26, .6);--checkpoint-border: var(--color-border);--checkpoint-hover-border: #000000}.chains-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.5rem;margin:2rem 0}@media (max-width: 768px){.chains-grid{grid-template-columns:1fr;gap:1rem}}@media (min-width: 1200px){.chains-grid{grid-template-columns:repeat(auto-fill,minmax(380px,1fr))}}.chain-card{background:var(--chain-card-bg);border:1px solid var(--chain-card-border);border-radius:0;padding:1.5rem;transition:border-color .2s ease;position:relative;overflow:hidden}.chain-card:hover{border-color:var(--chain-card-border-hover)}.chain-card__header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:1rem;gap:1rem}.chain-card__title{font-size:1.25rem;font-weight:600;color:var(--color-white);margin:0 0 .5rem;line-height:1.3}.chain-card__meta{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1rem}.chain-card__description{color:var(--color-gray-400);font-size:.875rem;line-height:1.5;margin:1rem 0}.chain-card__stats{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem;margin-top:1rem;padding-top:1rem;border-top:1px solid var(--chain-card-border)}.chain-card__stat{display:flex;flex-direction:column;gap:.25rem}.chain-card__stat-label{font-size:.75rem;color:var(--color-gray-500);text-transform:uppercase;letter-spacing:.05em}.chain-card__stat-value{font-size:1.125rem;font-weight:600;color:var(--fg)}.chain-card__actions{display:flex;gap:.5rem;margin-top:1rem}.status-badge{display:inline-flex;align-items:center;gap:.375rem;padding:.375rem .875rem;border-radius:0;font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;transition:border-color .2s ease,background-color .2s ease;white-space:nowrap}.status-active{background:transparent;color:var(--status-active);border:1px solid var(--status-active)}.status-completed{background:transparent;color:var(--status-completed);border:1px solid var(--status-completed)}.status-archived{background:transparent;color:var(--status-archived);border:1px solid var(--status-archived)}.status-destroyed{background:transparent;color:var(--status-destroyed);border:1px solid var(--status-destroyed)}.status-pending{background:transparent;color:var(--status-pending);border:1px solid var(--status-pending)}.status-badge:hover{background:#ffffff0d}.chain-type-badge{display:inline-flex;align-items:center;gap:.375rem;padding:.25rem .75rem;border-radius:0;font-size:.75rem;font-weight:500;background:transparent;border:1px solid rgba(255,255,255,.1);color:var(--color-gray-300)}.chain-type-linear{color:var(--chain-linear);border-color:var(--chain-linear)}.chain-type-branching{color:var(--chain-branching);border-color:var(--chain-branching)}.chain-type-network{color:var(--chain-network);border-color:var(--chain-network)}.chain-timeline{position:relative;padding-left:2.5rem;margin:2rem 0}.chain-timeline:before{content:"";position:absolute;left:.875rem;top:0;bottom:0;width:2px;background:var(--timeline-line);opacity:.3}.checkpoint-card{position:relative;margin-bottom:2rem;background:var(--checkpoint-bg);border:1px solid var(--checkpoint-border);border-radius:0;padding:1.25rem;transition:border-color .2s ease}.checkpoint-card:hover{border-color:var(--checkpoint-hover-border)}.checkpoint-card:last-child{margin-bottom:0}.checkpoint-card__header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:.75rem;gap:1rem}.checkpoint-card__title{font-size:1rem;font-weight:600;color:var(--fg);margin:0}.checkpoint-card__type{font-size:.75rem;color:var(--color-gray-500);text-transform:uppercase;letter-spacing:.05em}.checkpoint-card__info{color:var(--color-gray-300);font-size:.875rem;line-height:1.6;margin:.5rem 0}.checkpoint-card__meta{display:flex;flex-wrap:wrap;gap:1rem;margin-top:.75rem;padding-top:.75rem;border-top:1px solid var(--checkpoint-border);font-size:.75rem;color:var(--color-gray-500)}.checkpoint-card__esg{display:flex;gap:1rem;margin-top:.5rem;padding:.75rem;background:#ffffff08;border:1px solid var(--checkpoint-border);border-radius:0;font-size:.75rem}.checkpoint-card__esg-item{display:flex;flex-direction:column;gap:.25rem}.checkpoint-card__esg-label{color:var(--color-gray-500)}.checkpoint-card__esg-value{color:var(--fg);font-weight:600}.checkpoint-number{position:absolute;left:-3.25rem;top:1.25rem;width:2rem;height:2rem;background:var(--timeline-marker-bg);color:var(--fg);border:1px solid var(--checkpoint-border);border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.875rem;z-index:1;transition:border-color .2s ease}.checkpoint-card:hover .checkpoint-number{border-color:var(--fg)}.chain-modal{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:var(--modal-backdrop);align-items:center;justify-content:center;z-index:1000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);animation:fadeIn .2s ease}.chain-modal.active{display:flex}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.modal-content{background:var(--modal-content-bg);border:1px solid var(--modal-border);padding:2rem;border-radius:0;max-width:600px;width:90%;max-height:85vh;overflow-y:auto;position:relative;animation:slideUp .3s ease}@keyframes slideUp{0%{transform:translateY(20px);opacity:0}to{transform:translateY(0);opacity:1}}.modal-content__header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--modal-border)}.modal-content__title{font-size:1.5rem;font-weight:700;color:var(--color-white);margin:0}.modal-close{position:absolute;top:1.5rem;right:1.5rem;background:#ffffff0d;border:1px solid var(--modal-border);width:2.5rem;height:2.5rem;border-radius:50%;font-size:1.25rem;color:var(--color-gray-400);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s ease;padding:0;line-height:1}.modal-close:hover{background:#f443361a;border-color:var(--status-destroyed);color:var(--status-destroyed);transform:rotate(90deg)}.modal-close:focus{outline:2px solid var(--fg);outline-offset:2px}.modal-content::-webkit-scrollbar{width:8px}.modal-content::-webkit-scrollbar-track{background:#ffffff0d}.modal-content::-webkit-scrollbar-thumb{background:var(--fg)}.modal-content::-webkit-scrollbar-thumb:hover{background:var(--color-white)}.items-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem;margin:1.5rem 0}@media (max-width: 768px){.items-grid{grid-template-columns:1fr}}.item-card{background:var(--checkpoint-bg);border:1px solid var(--checkpoint-border);border-radius:0;padding:1rem;transition:border-color .2s ease;cursor:pointer}.item-card:hover{border-color:var(--fg)}.item-card__name{font-size:1rem;font-weight:600;color:var(--color-white);margin:0 0 .5rem}.item-card__meta{display:flex;flex-wrap:wrap;gap:.5rem;font-size:.75rem;color:var(--color-gray-500)}.item-card__badge{padding:.25rem .5rem;background:transparent;border:1px solid var(--checkpoint-border);border-radius:0;color:var(--fg);font-weight:500}.relationship-indicator{display:inline-flex;align-items:center;gap:.5rem;padding:.5rem .75rem;background:transparent;border:1px solid var(--checkpoint-border);border-radius:0;font-size:.875rem;color:var(--color-gray-300)}.relationship-indicator__icon{width:1rem;height:1rem;color:var(--fg)}.relationship-indicator__label{font-weight:500}.relationship-indicator__count{font-weight:700;color:var(--fg)}.empty-state{text-align:center;padding:4rem 2rem;color:var(--color-gray-500)}.empty-state__icon{width:4rem;height:4rem;margin:0 auto 1rem;opacity:.5}.empty-state__title{font-size:1.25rem;font-weight:600;color:var(--color-gray-400);margin:0 0 .5rem}.empty-state__description{font-size:.875rem;color:var(--color-gray-500);margin:0 0 1.5rem}@media (max-width: 768px){.chain-card{padding:1rem}.chain-card__title{font-size:1.125rem}.chain-timeline{padding-left:2rem}.chain-timeline:before{left:.625rem}.checkpoint-number{left:-2.75rem;width:1.75rem;height:1.75rem;font-size:.75rem}.checkpoint-card{padding:1rem}.modal-content{padding:1.5rem;width:95%}.modal-close{top:1rem;right:1rem;width:2rem;height:2rem;font-size:1rem}}.chain-card--loading{pointer-events:none;opacity:.6}.chain-card--loading:after{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:linear-gradient(90deg,transparent,rgba(0,0,0,.06),transparent);animation:shimmer 1.5s infinite}@keyframes shimmer{0%{transform:translate(-100%)}to{transform:translate(100%)}}@media print{.chain-modal{display:none!important}.chain-card{page-break-inside:avoid;box-shadow:none;border:1px solid #000}.checkpoint-card{page-break-inside:avoid}}