:root{font-family:Inter,Noto Sans JP,Yu Gothic UI,Meiryo,sans-serif;color:#17213a;background:#eef0f4;font-synthesis:none;--ink: #17213a;--muted: #667085;--navy: #14213d;--board-gap: 18px;--note-size: 210px;color-scheme:light}:root[data-theme=dark]{color-scheme:dark;--ink: #edf2ff;--muted: #a8b2c7;--navy: #0a1020;color:#edf2ff;background:#111827}*{box-sizing:border-box}html,body,#app{min-height:100%}body{margin:0;min-width:320px;min-height:100vh;background:#eef0f4;transition:background-color .25s ease,color .25s ease}:root[data-theme=dark] body{background:#111827}button,textarea{font:inherit}button{-webkit-tap-highlight-color:transparent}.app-header{min-height:92px;padding:18px clamp(20px,4vw,58px);display:flex;align-items:center;justify-content:space-between;gap:24px;color:#fff;background:var(--navy);box-shadow:0 6px 24px #14213d2e;position:relative;z-index:20}.brand{display:flex;align-items:center;gap:14px}.brand-mark{width:48px;height:48px;display:grid;place-items:center;color:var(--navy);background:#ffd45c;border-radius:12px 12px 12px 4px;font:800 1.35rem/1 Georgia,serif;transform:rotate(-3deg);box-shadow:3px 4px #0a1226}.brand h1{margin:0;font-size:1.45rem;letter-spacing:.08em}.brand p{margin:3px 0 0;color:#cdd5e5;font-size:.82rem}.header-actions{display:flex;align-items:center;gap:18px}.note-count{margin:0;color:#cdd5e5;font-size:.9rem;white-space:nowrap}.theme-button{width:48px;height:48px;flex:0 0 48px;display:grid;place-items:center;border:1px solid rgb(255 255 255 / 22%);border-radius:14px;color:#f8fbff;background:#ffffff17;cursor:pointer;transition:background .15s ease,transform .15s ease,border-color .15s ease}.theme-button:hover{background:#ffffff2b;border-color:#ffffff61;transform:translateY(-1px)}.theme-button:active{transform:translateY(1px)}.theme-button svg{width:22px;height:22px;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.moon-icon{display:none}:root[data-theme=dark] .sun-icon{display:none}:root[data-theme=dark] .moon-icon{display:block}.add-button{min-height:48px;padding:0 21px;display:inline-flex;align-items:center;gap:9px;border:0;border-radius:14px;color:#17213a;background:#ffd45c;font-weight:800;cursor:pointer;box-shadow:0 5px #ba7c22;transition:transform .15s ease,box-shadow .15s ease,background .15s ease}.add-button span:first-child{font-size:1.45rem;line-height:1}.add-button:hover{background:#ffe184;transform:translateY(-1px);box-shadow:0 6px #ba7c22}.add-button:active{transform:translateY(3px);box-shadow:0 2px #ba7c22}.add-button:focus-visible,.theme-button:focus-visible,.delete-button:focus-visible,.note-text:focus-visible{outline:3px solid #1e87ff;outline-offset:3px}.workspace{padding:clamp(12px,2.2vw,30px)}.board{position:relative;min-height:calc(100vh - 145px);overflow:hidden;border:1px solid #d5d9e2;border-radius:22px;background-color:#fafbfc;background-image:radial-gradient(#cbd0da 1.15px,transparent 1.15px);background-size:24px 24px;box-shadow:inset 0 1px #fff,0 12px 35px #202e4b14;transition:min-height .2s ease}:root[data-theme=dark] .board{border-color:#344054;background-color:#1c2433;background-image:radial-gradient(#465268 1.15px,transparent 1.15px);box-shadow:inset 0 1px #ffffff0d,0 12px 35px #0000003d}.board:before{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(135deg,rgb(255 255 255 / 55%),transparent 35%)}:root[data-theme=dark] .board:before{background:linear-gradient(135deg,rgb(255 255 255 / 4%),transparent 35%)}.empty-state{position:absolute;inset:0;min-height:360px;display:grid;place-content:center;justify-items:center;text-align:center;color:var(--muted);pointer-events:none}.empty-state[hidden]{display:none}.empty-icon{width:58px;height:58px;display:grid;place-items:center;margin-bottom:18px;border:2px dashed #a8b0c0;border-radius:17px;color:#7c879c;font-size:2rem;transform:rotate(-4deg)}.empty-state h2{margin:0;color:#3c465a;font-size:1.15rem}:root[data-theme=dark] .empty-state h2{color:#dbe4f5}.empty-state p{margin:8px 0 0;font-size:.92rem}.note{position:absolute;width:var(--note-size);height:var(--note-size);padding:40px 15px 15px;border-radius:3px 3px 14px;touch-action:none;cursor:grab;box-shadow:0 12px 22px #222b412e,2px 3px #372b1214;transform:rotate(var(--rotation, -1deg));transform-origin:center;transition:box-shadow .18s ease,transform .18s ease}.note:after{content:"";position:absolute;right:0;bottom:0;width:26px;height:26px;border-radius:14px 0 13px;background:linear-gradient(135deg,#ffffff26 50%,#3c300f21 51%)}.note[data-color=yellow]{background:#ffdc6a}.note[data-color=blue]{background:#9cddf5}.note[data-color=pink]{background:#f7afd0}.note[data-color=green]{background:#b9e6b3}.note.is-dragging{cursor:grabbing;z-index:1000!important;transform:rotate(0) scale(1.025);box-shadow:0 20px 32px #222b4145}.drag-grip{position:absolute;top:15px;left:17px;width:32px;height:13px;background-image:radial-gradient(circle,rgb(23 33 58 / 45%) 1.6px,transparent 1.8px);background-size:8px 7px;pointer-events:none}.delete-button{position:absolute;top:8px;right:8px;width:34px;height:34px;border:0;border-radius:50%;background:#ffffff7f;color:#384054;display:grid;place-items:center;cursor:pointer;z-index:2;transition:background .15s ease,color .15s ease,transform .15s ease}.delete-button:hover{background:#fff;color:#bd263b;transform:scale(1.08)}.delete-button svg{width:17px;height:17px}.note-text{display:block;width:100%;height:100%;resize:none;border:0;outline:0;background:transparent;color:#252b38;font-size:1rem;font-weight:600;line-height:1.58;overflow-wrap:anywhere;cursor:text}.note-text::placeholder{color:#252b3878}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:767px){:root{--note-size: min(178px, calc(50vw - 22px) );--board-gap: 10px}.app-header{min-height:126px;padding:14px 16px 15px;align-items:flex-start}.brand{gap:10px}.brand-mark{width:43px;height:43px}.brand h1{font-size:1.25rem}.brand p{display:none}.header-actions{gap:10px}.note-count{position:absolute;left:18px;bottom:14px}.add-button{min-height:52px;padding:0 16px;border-radius:14px}.theme-button{width:52px;height:52px;flex-basis:52px}.workspace{padding:10px}.board{min-height:calc(100vh - 146px);border-radius:16px;background-size:20px 20px}.note{padding:42px 12px 12px;border-radius:3px 3px 11px}.delete-button{width:38px;height:38px;top:5px;right:5px}.drag-grip{top:16px;left:13px;width:38px}.note-text{font-size:1rem;line-height:1.5}}@media(max-width:390px){:root{--note-size: 166px}.brand h1{font-size:1.05rem}.add-button{width:52px;padding:0;justify-content:center}.add-button span:last-child{display:none}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important}}