.tool-intro{padding:42px 0 24px}.tool-intro .eyebrow{margin-bottom:12px}.tool-intro h1{font-size:clamp(34px,4vw,54px);margin:0 0 18px}.tool-intro .lede{max-width:760px;margin:0}.workbench{background:#fffefa;border:1px solid var(--line);border-radius:20px;padding:28px;margin:12px 0 36px}.toolbar{display:flex;align-items:end;gap:12px;flex-wrap:wrap}.toolbar label,.field{display:flex;flex-direction:column;gap:6px;font-size:13px;font-weight:600}.toolbar input,.toolbar select,.field input,.field select{border:1px solid #bccbbf;border-radius:8px;padding:10px 12px;background:white;color:var(--ink);min-height:44px;max-width:100%;font:inherit}.toolbar button,.tool-button{background:var(--green);color:#fff;border:1px solid var(--green);border-radius:8px;padding:11px 18px;min-height:44px;font:inherit;font-size:14px;cursor:pointer}.toolbar .secondary,.tool-button.secondary{background:white;color:var(--green);border-color:#bdcbbf}.toolbar button:disabled,.tool-button:disabled{opacity:.45;cursor:default}.status{font-size:14px;min-height:24px;margin:16px 0;color:var(--green)}.error{color:#9f352c}.help-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px;margin:36px 0 52px}.help-grid h2{font-size:24px}.help-grid p,.help-grid li{font-size:14px;line-height:1.8;color:var(--muted)}.help-grid a{text-decoration:underline}.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:26px 0}.metric{border-radius:14px;background:#edf2e3;padding:22px 18px}.metric span{display:block;color:var(--muted);font-size:12px}.metric strong{display:block;font-variant-numeric:tabular-nums;font-size:40px;letter-spacing:-.05em;line-height:1.4}.metric small{font-size:12px}.progress-track{height:8px;background:#e6eadf;border-radius:5px;overflow:hidden;margin:16px 0}.progress-track>span{display:block;height:100%;width:0;background:#698b50;transition:width .2s}.results-table{width:100%;border-collapse:collapse;font-size:13px}.results-table td,.results-table th{text-align:left;border-bottom:1px solid var(--line);padding:11px 8px}.table-scroll{overflow:auto}.clock-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin:25px 0}.clock-card{background:#22483d;color:#fff;border-radius:16px;padding:24px;position:relative}.clock-card h2{font-size:22px;margin:12px 0 4px;letter-spacing:-.02em}.clock-card .country{font-size:12px;color:#d5e1d4}.clock-card time{display:block;font-size:clamp(30px,3vw,43px);font-weight:600;font-variant-numeric:tabular-nums;letter-spacing:-.035em;white-space:nowrap;margin:14px 0 8px}.clock-card .clock-date,.clock-card .zone-offset{font-size:12px;color:#d5e1d4}.clock-card .zone-offset{margin-top:12px}.clock-remove{position:absolute;right:12px;top:12px;border:1px solid #658273;border-radius:50%;width:32px;height:32px;color:#fff;background:transparent;font-size:18px;cursor:pointer}.clock-card.local{background:#dcebb4;color:#234334}.clock-card.local .country,.clock-card.local .clock-date,.clock-card.local .zone-offset{color:#465c3d}.clock-card.local .clock-remove{color:#234334}.clock-add{flex:1;min-width:220px}.clock-add select{width:100%}.editor-shell{height:76vh;min-height:600px;background:#232323;border-radius:14px;overflow:hidden;position:relative;margin:20px 0}.editor-shell iframe{width:100%;height:100%;border:0;background:#232323}.editor-shell:fullscreen{height:100vh;border-radius:0}.editor-placeholder{height:100%;display:flex;align-items:center;justify-content:center;text-align:center;flex-direction:column;padding:25px;color:#fff}.editor-placeholder p{color:#ccd7ce;max-width:460px}.editor-placeholder strong{font-size:36px;font-weight:500;letter-spacing:-.04em}.editor-toolbar{justify-content:space-between}.editor-toolbar a{font-size:13px;text-decoration:underline}.board-layout{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(230px,.7fr);gap:28px;align-items:start}.board-frame{background:#dabb84;border:10px solid #bc9a61;border-radius:12px;padding:14px;aspect-ratio:1;max-width:620px}.gomoku-board{display:grid;grid-template-columns:repeat(15,1fr);width:100%;height:100%;gap:0;position:relative}.intersection{padding:0;border:0;border-radius:0;background:linear-gradient(#76572e,#76572e) center/1px 100% no-repeat,linear-gradient(#76572e,#76572e) center/100% 1px no-repeat;position:relative;min-width:0;min-height:0;aspect-ratio:1;cursor:pointer;touch-action:manipulation}.intersection:before{content:'';position:absolute;inset:8%;border-radius:50%}.intersection.black:before{background:radial-gradient(circle at 30% 25%,#555,#151515 65%);box-shadow:1px 2px 2px #0005}.intersection.white:before{background:radial-gradient(circle at 30% 25%,#fff,#deded9 75%);box-shadow:1px 2px 2px #0005}.intersection.last:after{content:'';position:absolute;inset:37%;border-radius:50%;background:#d67630}.intersection.win:before{outline:3px solid #386943}.intersection:focus-visible{outline:3px solid #47755b;outline-offset:0;z-index:2}.board-side .field{margin-bottom:18px}.board-status{background:#edf2e3;padding:22px;border-radius:12px;margin:18px 0}.board-status strong{font-size:23px}.board-status p{font-size:13px;margin:8px 0 0}.board-actions{display:flex;gap:10px;flex-wrap:wrap}.game-rule{font-size:13px;margin:18px 0}.calculator-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(230px,.55fr);gap:25px}.calc-display{width:100%;padding:18px!important;font-family:ui-monospace,monospace!important;font-size:24px!important}.calc-result{padding:15px 0;font-size:35px;min-height:72px;word-break:break-all;font-variant-numeric:tabular-nums}.keypad{display:grid;grid-template-columns:repeat(5,1fr);gap:8px}.keypad button{min-width:0;border:1px solid #d2dbc8;border-radius:8px;background:#edf2e3;color:var(--ink);padding:14px 4px;font:inherit;font-size:16px;cursor:pointer}.keypad button.equals{background:var(--green);color:white}.calc-history{padding:0;list-style:none;max-height:440px;overflow:auto}.calc-history button{width:100%;text-align:left;background:transparent;border:0;border-bottom:1px solid var(--line);padding:14px 0;color:var(--ink);cursor:pointer;overflow-wrap:anywhere}.calc-history span{display:block;color:var(--muted);font-size:13px}.small-note{font-size:12px;color:var(--muted);line-height:1.7}
@media(max-width:850px){.metrics{grid-template-columns:1fr 1fr}.clock-grid{grid-template-columns:1fr 1fr}.board-layout,.calculator-layout{grid-template-columns:1fr}.board-side{max-width:620px}.calculator-layout aside{border-top:1px solid var(--line);padding-top:22px}.clock-card time{font-size:33px}.board-frame{padding:8px;border-width:7px}.workbench{padding:20px}.editor-shell{min-height:580px}.help-grid{gap:22px}}
@media(max-width:520px){.tool-intro{padding:30px 0 20px}.tool-intro h1{font-size:35px}.tool-intro .lede{font-size:15px}.workbench{padding:16px}.clock-grid{grid-template-columns:1fr}.clock-card time{font-size:44px}.help-grid{grid-template-columns:1fr;gap:10px}.metric{padding:18px 13px}.metric strong{font-size:34px}.toolbar{gap:10px}.toolbar label{max-width:100%}.clock-add{min-width:100%}.board-frame{padding:5px;border-width:5px}.board-layout{gap:16px}.keypad button{padding:13px 0;font-size:14px}.editor-shell{min-height:560px}.tool-intro:lang(ko) h1{font-size:34px}}

/* Keep long time-zone names and second-level clocks inside narrow phone cards. */
@media(max-width:480px){.clock-grid{grid-template-columns:minmax(0,1fr)}.clock-card{min-width:0;padding:18px}.clock-card time{font-size:26px}.clock-card .zone-offset{overflow-wrap:anywhere}}