/* Sheet pages (homepage, About, 404): the notebook page on the desk, with bookmark tabs on its edge.
   Shared parts only: page-specific looks are in home.css and about.css. */

.sheet {
	--desk: #dfe2e8;
	--margin: clamp(1.1rem, 6vw, 5.5rem);
	margin: 0;
	background: var(--desk);
	color: var(--ink);
	font-family: var(--sans);
	font-size: 1.0625rem;
	line-height: 1.6;
	-webkit-font-smoothing: antialiased;
}

html:has(.sheet) {
	scroll-behavior: smooth;
}

:where(.sheet) a {
	color: inherit;
}

:where(.sheet) button {
	font: inherit;
	color: inherit;
}

.page section {
	padding-top: clamp(2.75rem, 6.5vw, 5.5rem);
	position: relative;
}

.book { --paper: #f7f8fa; max-width: 1240px; margin: clamp(0.5rem, 2.5vw, 2rem) auto 5rem; position: relative; padding-right: clamp(0px, 3.4vw, 2.75rem); }
.page {
	position: relative; background-color: var(--paper); border-radius: 4px 14px 14px 4px;
	box-shadow: 0 1px 0 #fff inset, 0 30px 60px -30px rgba(12, 18, 34, 0.35), 0 2px 6px rgba(12, 18, 34, 0.08);
	background-image: radial-gradient(circle at center, rgba(12, 18, 34, 0.22) 0.9px, transparent 1.3px);
	background-size: 24px 24px; background-position: 11px 11px;
	padding:  0 clamp(1.1rem, 4vw, 3.5rem) 0 var(--margin);
}
.page::before { content: ""; position: absolute; top: 0; bottom: 0; left: calc(var(--margin) - clamp(0.6rem, 2vw, 1.75rem)); width: 1.5px; background: rgba(216, 67, 47, 0.38); }
.tabs { --tabw: clamp(0px, 3.4vw, 2.75rem); position: sticky; top: 5.5rem; height: 0; width: var(--tabw); margin-left: auto; transform: translateX(100%); display: flex; flex-direction: column; gap: 0.4rem; z-index: 6; }
.tabs a {
	flex: none; writing-mode: vertical-rl; text-decoration: none; padding: 0.9rem 0.45rem; width: var(--tabw); overflow: hidden;
	border-radius: 0 8px 8px 0; font: 500 0.7rem var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink);
	box-shadow: 2px 2px 5px rgba(12, 18, 34, 0.12); transform: translateX(-7px); filter: saturate(0.55) brightness(1.04); opacity: 0.8;
	transition: transform 0.3s var(--ease), filter 0.3s, opacity 0.3s, box-shadow 0.3s;
}
.tabs a:hover { transform: translateX(-2px); opacity: 1; filter: none; }
.tabs a[aria-current] { transform: translateX(3px); filter: none; opacity: 1; font-weight: 600; box-shadow: 4px 4px 10px rgba(12, 18, 34, 0.22); }
.tabs a:nth-child(1) { background: #ffe45c; }
.tabs a:nth-child(2) { background: #b9d4ff; }
.tabs a:nth-child(3) { background: #ffd59a; }
.tabs a:nth-child(4) { background: #ffc7b8; }
.tabs a:nth-child(5) { background: #c9eccb; }
.tabs a:nth-child(6) { background: #e3d2f7; }
.status { display: flex; align-items: center; gap: 0.55rem; color: var(--ink-2); margin: 0 0 1.3rem; font-size: 0.97rem; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: #23a35a; box-shadow: 0 0 0 4px rgba(35, 163, 90, 0.18); flex: none; }
.facts { margin: 0; display: flex; flex-wrap: wrap; gap: 0.4rem 2rem; padding: 1rem 0; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); color: var(--ink-2); }
.head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.4rem 1rem; margin-bottom: 2rem; }
.head h2 { margin: 0; font-family: var(--serif); font-weight: 400; font-size: clamp(2rem, 4vw, 3.1rem); letter-spacing: -0.03em; line-height: 1; }
.head .mono { color: var(--ink-3); margin-left: auto; text-align: right; }
.habits { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(1rem, 2.5vw, 2rem); }
.habit { position: relative; padding: 1.4rem 1.2rem 1.3rem; }
.habit:nth-child(1) { background: #ffe45c; transform: rotate(-1.2deg); }
.habit:nth-child(2) { background: #b9d4ff; transform: rotate(0.8deg); margin-top: 1rem; }
.habit:nth-child(3) { background: #c9eccb; transform: rotate(-0.5deg); }
.habit { box-shadow: 0 20px 30px -22px rgba(12, 18, 34, 0.55); transition: transform 0.35s var(--ease); }
.habit:hover { transform: rotate(0) translateY(-5px); }
.habit h3 { margin: 0 0 0.6rem; font-family: var(--serif); font-weight: 400; font-size: clamp(1.5rem, 2.4vw, 1.95rem); line-height: 1.05; letter-spacing: -0.025em; }
.habit p { margin: 0; color: var(--ink-2); font-size: 0.97rem; }
.habit .mono { display: block; margin-bottom: 0.3rem; color: var(--ink); opacity: 0.6; }
.log { list-style: none; margin: clamp(2rem, 4vw, 3rem) 0 0; padding: 0; columns: 2; column-gap: clamp(1.5rem, 4vw, 3.5rem); }
.log li { break-inside: avoid; display: grid; grid-template-columns: 9.5rem 1fr; gap: 1rem; padding: 0.85rem 0; border-top: 1px solid var(--rule); }
.log time { color: var(--ink-3); padding-top: 0.25rem; }
.log b { display: block; font-weight: 600; }
.log span { color: var(--ink-2); font-size: 0.95rem; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.cards a { text-decoration: none; background: #fff; padding: 1.2rem; min-height: 12.5rem; display: flex; flex-direction: column; gap: 0.6rem; box-shadow: 0 1px 2px rgba(12, 18, 34, 0.12), 0 14px 26px -18px rgba(12, 18, 34, 0.35); background-image: linear-gradient(transparent calc(100% - 1px), rgba(38, 70, 245, 0.16) 1px); background-size: 100% 1.75rem; border-top: 3px solid var(--pen); transition: transform 0.35s var(--ease); }
.cards a:nth-child(1) { transform: rotate(-0.8deg); }
.cards a:nth-child(3) { transform: rotate(0.9deg); }
.cards a:hover { transform: translateY(-4px); }
.cards b { font-family: var(--serif); font-weight: 400; font-size: 1.55rem; line-height: 1.13; letter-spacing: -0.02em; }
.cards .hand { font-size: 1.35rem; }
.cards .mono { margin-top: auto; color: var(--ink-3); }
.sticky { position: relative; background: var(--hl); padding: clamp(1.5rem, 4vw, 2.75rem); display: grid; grid-template-columns: 1.4fr auto; gap: 1.5rem; align-items: center; transform: rotate(-0.6deg); box-shadow: 0 22px 34px -22px rgba(12, 18, 34, 0.5); }
.sticky h2 { margin: 0 0 0.5rem; font-family: var(--serif); font-weight: 400; font-size: clamp(1.8rem, 3.6vw, 2.9rem); line-height: 1.02; letter-spacing: -0.03em; }
.sticky p { margin: 0; color: var(--ink-2); max-width: 36rem; }
.head .mono a { color: inherit; text-decoration: none; border-bottom: 1.5px solid var(--pen); }
.cards a > div { display: contents; }

@media (max-width: 900px) {
	.sticky, .cards, .habits { grid-template-columns: 1fr; }
	.habit:nth-child(2) { margin-top: 0; }
	.log { columns: 1; }
	.log li { grid-template-columns: 1fr; gap: 0.15rem; }
	/* phones: the tabs become a strip under the top bar; it rises to the top of the screen when the bar slides away */
	.tabs { top: var(--nav); transition: top 0.35s var(--ease); height: auto; width: auto; margin: 0 0 0.5rem; transform: none; flex-direction: row; gap: 3px; padding: 0 6px; background: var(--desk); z-index: 20; }
	.tabs a { writing-mode: horizontal-tb; flex: 1; width: auto; text-align: center; padding: 0.5rem 0.05rem 0.55rem; font-size: 0.58rem; letter-spacing: 0.05em; border-radius: 0 0 8px 8px; transform: none; box-shadow: 0 2px 4px rgba(12, 18, 34, 0.12); }
	.tabs a:hover { transform: none; }
	.tabs a[aria-current] { transform: translateY(4px); box-shadow: 0 5px 10px rgba(12, 18, 34, 0.25); }
	body:has([data-header].is-hidden) .tabs { top: 0; }
	.page section { scroll-margin-top: 4.5rem; }
	.book { padding-right: 0; }
}

/* ---------- the binding on the left, rulers on top, bottom and right (built by js/notebook.js) ---------- */
.page {
	--bind: 34px;
	--rule-h: 22px;
	--rule-w: 20px;
	padding-top: var(--rule-h);
	padding-bottom: calc(3rem + var(--rule-h));
}

.page::after {
	content: "";
	position: absolute;
	z-index: 7;
	top: 0;
	bottom: 0;
	left: -14px;
	width: 44px;
	background: url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20width='44'%20height='28'%20viewBox='0%200%2044%2028'%3E%3Cdefs%3E%3ClinearGradient%20id='g'%20x1='0'%20y1='0'%20x2='0'%20y2='1'%3E%3Cstop%20offset='0'%20stop-color='%23f6f7fa'/%3E%3Cstop%20offset='.5'%20stop-color='%239ba3b2'/%3E%3Cstop%20offset='1'%20stop-color='%23e4e7ee'/%3E%3C/linearGradient%3E%3C/defs%3E%3Ccircle%20cx='27'%20cy='14'%20r='5.4'%20fill='%23b9bfcb'/%3E%3Ccircle%20cx='27'%20cy='14'%20r='5.4'%20fill='none'%20stroke='%238d95a5'%20stroke-width='1'/%3E%3Crect%20x='2'%20y='9.5'%20width='30'%20height='9'%20rx='4.5'%20fill='url%28%23g%29'%20stroke='%237f8798'%20stroke-width='.8'/%3E%3Crect%20x='5'%20y='11.2'%20width='22'%20height='1.6'%20rx='.8'%20fill='%23fff'%20opacity='.75'/%3E%3C/svg%3E") 0 8px repeat-y;
	pointer-events: none;
}

.ruler {
	position: absolute;
	z-index: 6;
	pointer-events: none;
	background-color: #eceef3;
	color: #6b7385;
	font-family: var(--mono);
	font-size: 8.5px;
	line-height: 1;
	letter-spacing: 0.02em;
	user-select: none;
}

.ruler-x {
	left: var(--bind);
	right: var(--rule-w);
	height: var(--rule-h);
	background-image:
		repeating-linear-gradient(90deg, rgba(12, 18, 34, 0.55) 0 1px, transparent 1px 100px),
		repeating-linear-gradient(90deg, rgba(12, 18, 34, 0.42) 0 1px, transparent 1px 50px),
		repeating-linear-gradient(90deg, rgba(12, 18, 34, 0.3) 0 1px, transparent 1px 10px);
	background-size: 100% 12px, 100% 8px, 100% 4px;
	background-repeat: no-repeat;
	background-position: calc(-1 * var(--bind)) bottom, calc(-1 * var(--bind)) bottom, calc(-1 * var(--bind)) bottom;
	border-bottom: 1px solid rgba(12, 18, 34, 0.14);
}

.ruler-x--top {
	top: 0;
}

.ruler-x--bottom {
	bottom: 0;
	border-bottom: 0;
	border-top: 1px solid rgba(12, 18, 34, 0.14);
	background-position: calc(-1 * var(--bind)) top, calc(-1 * var(--bind)) top, calc(-1 * var(--bind)) top;
	border-radius: 0 0 0 4px;
}

.ruler-y {
	right: 0;
	top: var(--rule-h);
	bottom: var(--rule-h);
	width: var(--rule-w);
	background-image:
		repeating-linear-gradient(180deg, rgba(12, 18, 34, 0.55) 0 1px, transparent 1px 100px),
		repeating-linear-gradient(180deg, rgba(12, 18, 34, 0.42) 0 1px, transparent 1px 50px),
		repeating-linear-gradient(180deg, rgba(12, 18, 34, 0.3) 0 1px, transparent 1px 10px);
	background-size: 12px 100%, 8px 100%, 4px 100%;
	background-repeat: no-repeat;
	background-position: left calc(-1 * var(--rule-h)), left calc(-1 * var(--rule-h)), left calc(-1 * var(--rule-h));
	border-left: 1px solid rgba(12, 18, 34, 0.14);
}

.ruler-corner {
	right: 0;
	width: var(--rule-w);
	height: var(--rule-h);
	display: grid;
	place-items: center;
	font-size: 7px;
	letter-spacing: 0.06em;
	text-transform: uppercase;
	border-left: 1px solid rgba(12, 18, 34, 0.14);
}

.ruler-corner--top {
	top: 0;
	border-radius: 0 14px 0 0;
}

.ruler-corner--bottom {
	bottom: 0;
	border-radius: 0 0 14px 0;
}

.ruler-x span,
.ruler-y span {
	position: absolute;
	white-space: nowrap;
}

.ruler-x--top span {
	top: 3px;
	transform: translateX(3px);
}

.ruler-x--bottom span {
	bottom: 3px;
	transform: translateX(3px);
}

.ruler-y span {
	left: 3px;
	writing-mode: vertical-rl;
	transform: rotate(180deg) translateY(3px);
}

/* the pointer's position, drawn on the rulers like a designer's guide */
.ruler .guide {
	position: absolute;
	background: var(--pen);
	opacity: 0;
	transition: opacity 0.2s;
}

.ruler-x .guide {
	top: 0;
	bottom: 0;
	width: 1px;
}

.ruler-y .guide {
	left: 0;
	right: 0;
	height: 1px;
}

.ruler .guide b {
	position: absolute;
	padding: 1px 3px;
	background: var(--pen);
	color: #fff;
	font-weight: 500;
	font-size: 8px;
	border-radius: 2px;
}

.ruler-x--top .guide b {
	top: 100%;
	left: 2px;
	margin-top: 2px;
}

.ruler-y .guide b {
	right: 100%;
	top: -6px;
	margin-right: 3px;
}

.page.is-pointed .ruler .guide {
	opacity: 1;
}

@media (hover: none) {
	.ruler .guide {
		display: none;
	}
}

@media (max-width: 900px) {
	.page {
		--bind: 0px;
		--rule-h: 18px;
		--rule-w: 0px;
	}

	.page::after {
		left: 4px;
		width: 14px;
		background-image: url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20width='14'%20height='28'%20viewBox='0%200%2014%2028'%3E%3Ccircle%20cx='7'%20cy='14'%20r='3.6'%20fill='%23c3c9d4'%20stroke='%239aa2b1'%20stroke-width='.8'/%3E%3C/svg%3E");
		background-position: 0 0;
	}

	.ruler-y,
	.ruler-corner {
		display: none;
	}

	.ruler-x {
		left: 0;
		right: 0;
		font-size: 8px;
		background-position: 0 bottom, 0 bottom, 0 bottom;
	}

	.ruler-x--bottom {
		background-position: 0 top, 0 top, 0 top;
	}

	.ruler-x--top {
		border-radius: 4px 14px 0 0;
	}

	.ruler-x--bottom {
		border-radius: 0 0 14px 4px;
	}
}