Techniques
Notan ink-wash gradient
A graded tonal wash from saturated sumi black to pale gray, mimicking diluted ink bleeding across washi.
.notan-wash {
background: linear-gradient(
160deg,
#16130F 0%,
#3A352D 28%,
#6E675B 55%,
#A39C8C 78%,
rgba(216,207,190,0) 100%
);
filter: blur(0.5px);
}
Kasure flying-white edge
Dry-brush texture where the stroke fractures and bare paper shows through, achieved by layering a streaked mask over an ink fill.
.kasure-stroke {
background-color: #16130F;
-webkit-mask-image: repeating-linear-gradient(
92deg,
#000 0px,
#000 6px,
transparent 7px,
#000 11px,
rgba(0,0,0,0.4) 14px,
#000 18px
);
mask-image: repeating-linear-gradient(
92deg,
#000 0px, #000 6px, transparent 7px,
#000 11px, rgba(0,0,0,0.4) 14px, #000 18px
);
border-radius: 1px;
}
Vermilion seal stamp
A small carved-square hanko impression in cinnabar red — the single focal accent, with slightly uneven edges to read as hand-pressed.
.hanko-seal {
display: inline-block;
width: 56px;
height: 56px;
color: #E2462F;
border: 3px solid currentColor;
border-radius: 3px;
font-family: 'Zen Old Mincho', serif;
font-weight: 700;
line-height: 50px;
text-align: center;
letter-spacing: 0;
box-shadow: inset 0 0 0 2px rgba(226,70,47,0.25);
filter: contrast(1.1) saturate(1.05);
opacity: 0.92;
}