.ring-hero { position: relative; overflow: hidden; padding-bottom: 38px; }
.ring-hero::before, .ring-hero::after { content: ''; position: absolute; border: 1px solid rgba(255,255,255,.08); border-radius: 50%; pointer-events: none; }
.ring-hero::before { width: 240px; height: 240px; left: -90px; top: -130px; }
.ring-hero::after { width: 150px; height: 150px; right: -35px; bottom: -100px; box-shadow: 0 0 0 24px rgba(232,101,10,.05), 0 0 0 48px rgba(232,101,10,.025); }
.ring-hero__badge, .ring-kicker { display: inline-flex; align-items: center; gap: 7px; color: var(--c-accent); font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.ring-hero__badge { margin-bottom: 10px; padding: 5px 11px; border: 1px solid rgba(232,101,10,.4); background: rgba(232,101,10,.12); border-radius: 999px; }
.ring-hero h1, .ring-hero p, .ring-hero .tool-breadcrumb { position: relative; z-index: 1; }

.ring-app { max-width: 1240px; margin: 0 auto; padding: 22px 16px 48px; }
.ring-layout { display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr); gap: 18px; align-items: stretch; }
.ring-layout > .panel, .ring-number, .ring-input-panel { min-width: 0; }
.ring-controls, .ring-result { height: 100%; padding: 22px; border-radius: 14px; }

.ring-methods { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 22px; }
.ring-method { min-width: 0; border: 1px solid var(--c-border); background: #fafaf8; border-radius: 10px; padding: 10px 9px 12px; display: flex; flex-direction: column; align-items: center; gap: 5px; color: var(--c-muted); transition: border-color .18s ease, background .18s ease, transform .18s ease, box-shadow .18s ease; }
.ring-method:hover { border-color: #c7c5bd; transform: translateY(-1px); }
.ring-method.is-active { border-color: var(--c-accent); background: #fff8f2; color: var(--c-navy); box-shadow: 0 0 0 1px rgba(232,101,10,.08); }
.ring-method > img { width: 46px; height: 46px; object-fit: contain; }
.ring-method span { display: flex; flex-direction: column; align-items: center; min-width: 0; }
.ring-method strong { font-size: 12px; line-height: 1.3; }
.ring-method small { font-size: 10px; font-weight: 500; color: var(--c-muted); white-space: nowrap; }

.ring-input-panel { padding: 18px; background: #f7f6f2; border: 1px solid var(--c-border); border-radius: 12px; }
.ring-field-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.ring-field-head label, .ring-converter-grid label { font-size: 13px; font-weight: 650; color: var(--c-navy); display: block; }
.ring-help { border: 0; background: transparent; padding: 3px 0; color: var(--c-accent); font-size: 11px; font-weight: 700; border-bottom: 1px dashed currentColor; }
.ring-help[hidden] { display: none; }
.ring-number-wrap { display: grid; grid-template-columns: 42px minmax(0, 1fr) 42px; gap: 8px; align-items: stretch; }
.ring-step { border: 1px solid var(--c-border); background: #fff; color: var(--c-navy); border-radius: 9px; font-size: 21px; line-height: 1; transition: color .18s ease, border-color .18s ease, background .18s ease; }
.ring-step:hover { color: var(--c-accent); border-color: var(--c-accent); background: #fff8f2; }
.ring-number { position: relative; }
.ring-number input { width: 100%; height: 52px; border: 1px solid #cfcac1; background: #fff; border-radius: 9px; padding: 0 55px 0 16px; color: var(--c-navy); font-size: 22px; font-weight: 750; text-align: center; outline: none; font-variant-numeric: tabular-nums; }
.ring-number input:focus, .ring-converter-grid select:focus { border-color: var(--c-accent); box-shadow: 0 0 0 3px rgba(232,101,10,.12); }
.ring-number span { position: absolute; right: 15px; top: 50%; transform: translateY(-50%); font-size: 12px; font-weight: 700; color: var(--c-muted); pointer-events: none; }
.ring-range { width: 100%; height: 5px; margin: 23px 0 0; appearance: none; background: linear-gradient(90deg, #efc29e, var(--c-accent)); border-radius: 999px; outline: none; }
.ring-range::-webkit-slider-thumb { appearance: none; width: 20px; height: 20px; border-radius: 50%; background: #fff; border: 5px solid var(--c-accent); box-shadow: 0 1px 6px rgba(0,0,0,.2); }
.ring-range::-moz-range-thumb { width: 12px; height: 12px; border-radius: 50%; background: #fff; border: 5px solid var(--c-accent); box-shadow: 0 1px 6px rgba(0,0,0,.2); }
.ring-range-scale { display: flex; justify-content: space-between; color: #918d84; font-size: 10px; font-weight: 600; margin-top: 7px; }
.ring-field-hint { color: var(--c-muted); font-size: 11px; line-height: 1.55; margin-top: 14px; }
.ring-screen-trigger { width: 100%; display: grid; grid-template-columns: 48px 1fr auto; align-items: center; gap: 11px; margin-top: 14px; padding: 9px 12px; border: 1px solid rgba(232,101,10,.32); border-radius: 10px; background: #fff8f2; color: var(--c-navy); text-align: left; transition: border-color .18s ease, transform .18s ease, box-shadow .18s ease; }
.ring-screen-trigger:hover { border-color: var(--c-accent); transform: translateY(-1px); box-shadow: 0 5px 16px rgba(232,101,10,.1); }
.ring-screen-trigger > img { width: 48px; height: 48px; object-fit: contain; }
.ring-screen-trigger > span { display: flex; flex-direction: column; min-width: 0; }
.ring-screen-trigger strong { font-size: 11px; }
.ring-screen-trigger small { color: var(--c-muted); font-size: 9px; line-height: 1.4; }
.ring-screen-trigger b { color: var(--c-accent); font-size: 18px; }
.ring-screen-card { grid-column: 1 / -1; grid-template-columns: 58px minmax(0, 1fr) auto; margin-top: 0; padding: 13px 16px; border-color: rgba(232,101,10,.45); border-radius: 14px; background: linear-gradient(135deg, #fffaf6, #fff0e3); box-shadow: var(--shadow-sm); }
.ring-screen-card > img { width: 58px; height: 58px; }
.ring-screen-card strong { color: var(--c-navy); font-size: 14px; }
.ring-screen-card small { margin-top: 3px; font-size: 10px; }
.ring-screen-card b { font-size: 22px; }

.ring-converter-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.ring-converter-grid label { margin-bottom: 7px; }
.ring-converter-grid select { width: 100%; height: 45px; border: 1px solid #cfcac1; background: #fff; color: var(--c-navy); border-radius: 9px; padding: 0 34px 0 12px; font-size: 12px; font-weight: 600; outline: none; }

.ring-width-choice { border: 0; margin-top: 20px; }
.ring-width-choice legend { font-size: 13px; font-weight: 650; color: var(--c-navy); margin-bottom: 9px; }
.ring-width-choice legend span { color: var(--c-muted); font-size: 10px; font-weight: 500; margin-left: 4px; }
.ring-segments { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.ring-segments label { cursor: pointer; }
.ring-segments input { position: absolute; opacity: 0; pointer-events: none; }
.ring-segments label > span { min-height: 57px; display: flex; flex-direction: column; justify-content: center; padding: 10px 13px; background: #fff; border: 1px solid var(--c-border); border-radius: 9px; transition: border-color .18s ease, background .18s ease; }
.ring-segments strong { color: var(--c-navy); font-size: 12px; }
.ring-segments small { color: var(--c-muted); font-size: 10px; }
.ring-segments input:checked + span { border-color: var(--c-accent); background: #fff8f2; box-shadow: inset 3px 0 0 var(--c-accent); }
.ring-segments input:focus-visible + span { outline: 2px solid var(--c-accent); outline-offset: 2px; }

.ring-measure-note { display: flex; gap: 9px; align-items: flex-start; margin-top: 16px; padding: 12px; background: #f3f6f8; border-radius: 9px; color: #556273; font-size: 11px; line-height: 1.5; }
.ring-measure-note[hidden] { display: none; }
.ring-measure-note > img { width: 17px; height: 17px; flex: 0 0 auto; object-fit: contain; margin-top: 1px; }
.ring-info-symbol { width: 17px; height: 17px; flex: 0 0 auto; display: inline-flex; align-items: center; justify-content: center; border: 1px solid #bdc7d0; border-radius: 50%; color: #778697; font-size: 10px; font-weight: 750; font-style: normal; line-height: 1; }

.ring-result { background: #fff; }
.ring-visual-card { min-height: 225px; display: grid; grid-template-columns: .85fr 1.15fr; align-items: center; overflow: hidden; border-radius: 13px; padding: 20px 10px 20px 23px; color: #fff; background: radial-gradient(circle at 78% 15%, rgba(232,101,10,.32), transparent 31%), linear-gradient(145deg, #152335, #273e58); position: relative; }
.ring-visual-card::after { content: ''; position: absolute; inset: auto -55px -110px auto; width: 210px; height: 210px; border: 1px solid rgba(255,255,255,.07); border-radius: 50%; box-shadow: 0 0 0 28px rgba(255,255,255,.025); }
.ring-visual-copy { position: relative; z-index: 2; }
.ring-visual-copy > span { display: block; color: rgba(255,255,255,.64); font-size: 11px; font-weight: 650; }
.ring-visual-copy > strong { display: block; color: #fff; font-size: clamp(48px, 7vw, 72px); line-height: 1; letter-spacing: -.05em; margin: 8px 0; font-variant-numeric: tabular-nums; }
.ring-visual-copy > strong small { font-size: .2em; letter-spacing: .08em; vertical-align: middle; color: #f6ca72; }
.ring-visual-copy > p { color: rgba(255,255,255,.55); font-size: 10px; line-height: 1.45; max-width: 150px; }
.ring-visual { position: relative; z-index: 1; display: flex; align-items: center; justify-content: center; min-height: 185px; }
.ring-render-wrap { width: min(72%, 164px); aspect-ratio: 1; position: relative; flex: 0 0 auto; }
.ring-render { width: 100%; height: 100%; position: relative; border-radius: 50%; background: conic-gradient(from 220deg, #a86616, #ffe69a 18%, #d99a32 38%, #fff0ad 52%, #b87319 76%, #e9bc58 90%, #a86616); box-shadow: 0 9px 16px rgba(8,19,31,.3), inset 0 0 0 1px rgba(255,255,255,.55); }
.ring-render::after { content: ''; position: absolute; inset: 17px; border-radius: 50%; background: #1b3047; box-shadow: inset 0 3px 9px rgba(0,0,0,.28), 0 0 0 1px rgba(100,62,15,.45); }
.ring-diamond { position: absolute; z-index: 3; left: 50%; top: -27px; width: 48px; height: 40px; transform: translateX(-50%); clip-path: polygon(20% 0, 80% 0, 100% 34%, 50% 100%, 0 34%); background: linear-gradient(135deg, #dff8ff 0 18%, #79cde3 19% 37%, #f5fdff 38% 52%, #55b6d2 53% 70%, #c7f3ff 71% 100%); filter: drop-shadow(0 5px 4px rgba(5,20,35,.35)); }
.ring-diamond::after { content: ''; position: absolute; inset: 4px 7px 10px; clip-path: polygon(20% 0,80% 0,100% 36%,50% 100%,0 36%); border: 1px solid rgba(255,255,255,.75); }
.ring-visual-measure { position: absolute; z-index: 4; left: 17px; right: 17px; top: 50%; transform: translateY(-50%); display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; color: #fff; }
.ring-visual-measure i { height: 1px; border-top: 1px dashed rgba(255,255,255,.9); position: relative; }
.ring-visual-measure i:first-child::before, .ring-visual-measure i:last-child::after { content: ''; position: absolute; top: -4px; width: 7px; height: 7px; border-top: 1.5px solid #fff; border-left: 1.5px solid #fff; }
.ring-visual-measure i:first-child::before { left: 0; transform: rotate(-45deg); }
.ring-visual-measure i:last-child::after { right: 0; transform: rotate(135deg); }
.ring-visual-measure span { background: var(--c-navy); color: #fff; border-radius: 999px; padding: 3px 8px; font-size: 10px; font-weight: 750; white-space: nowrap; }

.ring-size-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 12px; }
.ring-size-card { min-width: 0; padding: 13px 10px; border: 1px solid var(--c-border); border-radius: 10px; background: #fafaf8; text-align: center; }
.ring-size-card span, .ring-size-card small { display: block; color: var(--c-muted); font-size: 9px; }
.ring-size-card span { text-transform: uppercase; letter-spacing: .06em; font-weight: 700; }
.ring-size-card strong { display: block; color: var(--c-navy); font-size: 22px; line-height: 1.2; margin: 4px 0 2px; font-variant-numeric: tabular-nums; }
.ring-equivalence { margin-top: 8px; padding: 11px 13px; border: 1px solid #d9e2eb; border-radius: 10px; background: #f4f7fa; text-align: center; }
.ring-equivalence span { display: block; color: var(--c-muted); font-size: 9px; margin-bottom: 3px; }
.ring-equivalence strong { display: block; color: var(--c-navy); font-size: 12px; font-variant-numeric: tabular-nums; }

.ring-specs { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--c-border); border: 1px solid var(--c-border); border-radius: 10px; overflow: hidden; margin-top: 8px; }
.ring-specs > div { display: flex; justify-content: space-between; gap: 10px; padding: 11px 13px; background: #fff; font-size: 11px; }
.ring-specs span { color: var(--c-muted); }
.ring-specs strong { color: var(--c-navy); font-variant-numeric: tabular-nums; }

.ring-recommendation { display: flex; gap: 11px; align-items: flex-start; margin-top: 18px; padding: 13px; background: #f0f8f4; border: 1px solid #cae8d9; border-radius: 10px; }
.ring-recommendation__icon { width: 25px; height: 25px; border-radius: 50%; display: flex; align-items: center; justify-content: center; background: var(--c-green); color: #fff; font-size: 12px; flex: 0 0 auto; }
.ring-recommendation strong { display: block; color: #176244; font-size: 11px; margin-bottom: 2px; }
.ring-recommendation p { color: #527264; font-size: 10px; line-height: 1.5; }

.ring-dialog { width: min(880px, calc(100% - 28px)); max-height: calc(100dvh - 24px); margin: auto; border: 0; border-radius: 15px; padding: 28px; overflow: auto; color: var(--c-text); background: #fff; box-shadow: 0 25px 80px rgba(0,0,0,.3); }
.ring-dialog[open] { position: fixed; inset: 0; margin: auto; }
.ring-dialog::backdrop { background: rgba(14,26,39,.68); backdrop-filter: blur(3px); }
.ring-dialog h2 { color: var(--c-navy); font-size: 23px; margin: 6px 0 20px; }
.ring-dialog__close { position: absolute; right: 14px; top: 12px; border: 0; background: #f2f1ed; width: 34px; height: 34px; border-radius: 50%; color: var(--c-navy); font-size: 22px; line-height: 1; }
.ring-guide-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.ring-guide-steps article { border: 1px solid var(--c-border); border-radius: 11px; padding: 15px; }
.ring-guide-graphic { height: 120px; display: flex; align-items: center; justify-content: center; background: #f7f6f2; border-radius: 8px; margin-bottom: 12px; color: var(--c-accent); }
.ring-guide-graphic img { width: 160px; height: 100px; object-fit: contain; }
.ring-guide-steps b, .ring-tip-grid article > span { color: var(--c-accent); font-size: 10px; letter-spacing: .08em; }
.ring-guide-steps h3 { color: var(--c-navy); font-size: 13px; margin: 3px 0 5px; }
.ring-guide-steps p { color: var(--c-muted); font-size: 11px; line-height: 1.55; }

.ring-screen-dialog { width: min(760px, calc(100% - 24px)); }
.screen-steps { display: grid; grid-template-columns: 1fr 44px 1fr; align-items: center; max-width: 480px; margin: 0 auto 22px; }
.screen-steps > span { display: flex; align-items: center; justify-content: center; gap: 7px; color: #8a8983; font-size: 11px; font-weight: 700; }
.screen-steps > span b { width: 24px; height: 24px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid #c9c7c0; border-radius: 50%; font-size: 10px; }
.screen-steps > span.is-active { color: var(--c-navy); }
.screen-steps > span.is-active b { color: #fff; border-color: var(--c-accent); background: var(--c-accent); }
.screen-steps > i { height: 1px; background: var(--c-border); }
.screen-panel { border: 1px solid var(--c-border); border-radius: 12px; background: #fafaf8; padding: 20px; }
.screen-copy { text-align: center; max-width: 570px; margin: 0 auto 17px; }
.screen-copy h3 { color: var(--c-navy); font-size: 16px; margin-bottom: 5px; }
.screen-copy p { color: var(--c-muted); font-size: 11px; line-height: 1.6; }
.screen-copy strong { color: var(--c-navy); }
.card-calibration-stage { min-height: 235px; display: flex; align-items: center; justify-content: center; overflow: auto; padding: 12px; border-radius: 10px; background-color: #eef1f3; background-image: linear-gradient(rgba(30,43,60,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(30,43,60,.045) 1px, transparent 1px); background-size: 16px 16px; }
.card-calibration { width: 324px; max-width: none; aspect-ratio: 85.6 / 53.98; flex: 0 0 auto; border: 2px dashed var(--c-accent); border-radius: 14px; display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--c-accent); background: rgba(255,255,255,.74); box-shadow: 0 5px 20px rgba(30,43,60,.08); }
.card-calibration::before { content: ''; width: 36px; height: 25px; margin-bottom: 9px; border: 1px solid rgba(232,101,10,.45); border-radius: 5px; background: linear-gradient(90deg, transparent 45%, rgba(232,101,10,.12) 45% 55%, transparent 55%); }
.card-calibration span { font-size: 13px; font-weight: 750; }
.card-calibration small { font-size: 9px; color: var(--c-muted); }
.screen-adjust { display: grid; grid-template-columns: 42px 1fr 42px; gap: 10px; align-items: center; max-width: 520px; margin: 16px auto; }
.screen-adjust button { width: 42px; height: 42px; border: 1px solid var(--c-border); border-radius: 9px; background: #fff; color: var(--c-navy); font-size: 20px; }
.screen-adjust button:hover { border-color: var(--c-accent); color: var(--c-accent); }
.screen-adjust input { width: 100%; accent-color: var(--c-accent); }
.screen-primary, .screen-secondary { min-height: 43px; border-radius: 9px; padding: 10px 16px; font-size: 11px; font-weight: 750; }
.screen-primary { display: block; border: 1px solid var(--c-accent); background: var(--c-accent); color: #fff; margin: 0 auto; }
.screen-primary:hover { background: var(--c-accent-h); }
.screen-secondary { border: 1px solid var(--c-border); background: #fff; color: var(--c-navy); }
.screen-ring-stage { min-height: 250px; display: flex; align-items: center; justify-content: center; overflow: hidden; border-radius: 10px; background: radial-gradient(circle at center, #fff 0 35%, #f0f2f4 72%, #e7eaed 100%); }
.screen-ring-circle { width: 64px; height: 64px; box-sizing: content-box; border: 0; outline: 3px solid var(--c-accent); outline-offset: 0; border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 0 0 7px rgba(232,101,10,.1); color: var(--c-navy); background: rgba(255,255,255,.42); }
.screen-ring-circle span { padding: 2px 5px; border-radius: 999px; background: rgba(255,255,255,.92); color: var(--c-navy); font-size: 9px; font-weight: 750; white-space: nowrap; }
.screen-reading { max-width: 520px; margin: 0 auto 12px; display: flex; justify-content: space-between; align-items: center; gap: 15px; padding: 12px 14px; border: 1px solid var(--c-border); border-radius: 9px; background: #fff; }
.screen-reading span { color: var(--c-muted); font-size: 10px; }
.screen-reading strong { color: var(--c-accent); font-size: 17px; font-variant-numeric: tabular-nums; }
.screen-safety { max-width: 520px; margin: 0 auto 14px !important; display: flex; gap: 8px; align-items: flex-start; color: #607083 !important; font-size: 10px !important; line-height: 1.5; }
.screen-safety .ring-info-symbol { margin-top: 1px; }
.screen-actions { display: flex; justify-content: center; gap: 8px; }
.screen-actions .screen-primary { margin: 0; }

.ring-info, .ring-related { max-width: 1240px; }
.ring-info > h2, .ring-related > h2, .ring-systems h2 { color: var(--c-navy); }
.ring-how-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 24px; }
.ring-how-grid article { background: #fff; border: 1px solid var(--c-border); border-radius: 12px; padding: 22px; position: relative; overflow: hidden; }
.ring-how-grid article::after { content: ''; position: absolute; right: -45px; top: -45px; width: 120px; height: 120px; border-radius: 50%; background: rgba(232,101,10,.05); }
.ring-how-icon { width: 58px; height: 58px; display: flex; align-items: center; justify-content: center; border-radius: 12px; background: linear-gradient(145deg, #fff8f2, #fff0e3); margin-bottom: 12px; }
.ring-how-icon img { width: 58px; height: 58px; object-fit: contain; }
.ring-how-grid h3 { font-size: 15px; color: var(--c-navy); margin-bottom: 10px; }
.ring-how-grid ol { padding-left: 19px; color: var(--c-muted); font-size: 12px; line-height: 1.75; }

.ring-systems { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; background: var(--c-navy); color: #fff; border-radius: 15px; margin-top: 15px; margin-bottom: 15px; }
.ring-systems h2 { color: #fff; margin-top: 5px; }
.ring-systems__content { display: grid; gap: 12px; }
.ring-systems__content p { color: rgba(255,255,255,.68); font-size: 13px; line-height: 1.75; }
.ring-systems__content strong { color: #fff; }
.ring-system-guide__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 20px; }
.ring-system-guide__grid article { padding: 16px; border: 1px solid var(--c-border); border-radius: 10px; background: #fff; }
.ring-system-guide__grid strong { display: inline-flex; min-height: 25px; align-items: center; padding: 4px 8px; border-radius: 6px; color: var(--c-accent); background: #fff2e8; font-size: 10px; }
.ring-system-guide__grid h3 { margin: 9px 0 5px; color: var(--c-navy); font-size: 12px; }
.ring-system-guide__grid p { color: var(--c-muted); font-size: 10px; line-height: 1.55; }

.ring-tip-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 22px; }
.ring-tip-grid article { border-top: 2px solid var(--c-accent); background: #fff; padding: 18px 16px; border-radius: 0 0 10px 10px; box-shadow: var(--shadow-sm); }
.ring-tip-grid h3 { color: var(--c-navy); font-size: 12px; margin: 8px 0 5px; }
.ring-tip-grid p { color: var(--c-muted); font-size: 11px; line-height: 1.55; }

.faq-item.open .faq-a { display: block; }
.faq-plus { flex: 0 0 auto; color: var(--c-accent); font-size: 20px; font-weight: 400; line-height: 1; transition: transform .18s ease; }
.faq-item.open .faq-plus { transform: rotate(45deg); }

.ring-related-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 18px; }
.ring-related-grid a { display: grid; grid-template-columns: 36px 1fr auto; gap: 11px; align-items: center; padding: 15px; border: 1px solid var(--c-border); border-radius: 10px; background: #fff; transition: border-color .18s ease, transform .18s ease; }
.ring-related-grid a:hover { border-color: var(--c-accent); transform: translateY(-1px); }
.ring-related-grid a > span { width: 36px; height: 36px; border-radius: 8px; display: flex; align-items: center; justify-content: center; background: #fff2e8; color: var(--c-accent); font-weight: 700; }
.ring-related-grid strong { color: var(--c-navy); font-size: 12px; }
.ring-related-grid p { color: var(--c-muted); font-size: 10px; margin-top: 2px; }
.ring-related-grid b { color: var(--c-accent); }

@media (max-width: 900px) {
  .ring-layout { grid-template-columns: minmax(0, 1fr); }
  .ring-tip-grid { grid-template-columns: 1fr 1fr; }
  .ring-system-guide__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 620px) {
  .ring-app { padding: 14px 10px 34px; }
  .ring-controls, .ring-result { padding: 15px; border-radius: 11px; }
  .ring-screen-card { grid-template-columns: 50px minmax(0, 1fr) auto; padding: 11px 13px; border-radius: 11px; }
  .ring-screen-card > img { width: 50px; height: 50px; }
  .ring-screen-card strong { font-size: 13px; }
  .ring-methods { gap: 5px; }
  .ring-method { padding: 10px 4px; }
  .ring-method small { display: none; }
  .ring-method strong { font-size: 10px; }
  .ring-method > img { width: 38px; height: 38px; }
  .ring-converter-grid, .ring-how-grid, .ring-systems, .ring-related-grid { grid-template-columns: 1fr; }
  .ring-visual-card { grid-template-columns: .85fr 1.15fr; min-height: 185px; padding: 15px 4px 15px 17px; }
  .ring-visual-copy > strong { font-size: 48px; }
  .ring-render-wrap { width: min(78%, 145px); }
  .ring-render::after { inset: 15px; }
  .ring-visual-measure { left: 15px; right: 15px; }
  .ring-diamond { top: -24px; width: 43px; height: 36px; }
  .ring-size-grid { grid-template-columns: repeat(3, 1fr); }
  .ring-size-card { padding-left: 5px; padding-right: 5px; }
  .ring-size-card { padding: 11px 8px; }
  .ring-specs { grid-template-columns: 1fr; }
  .ring-guide-steps { grid-template-columns: 1fr; }
  .ring-system-guide__grid { grid-template-columns: 1fr; }
  .ring-guide-graphic { height: 105px; }
  .ring-dialog { padding: 21px 16px; }
  .ring-screen-dialog { width: calc(100% - 4px); padding: 18px 8px; }
  .ring-screen-dialog .screen-panel { padding: 14px 4px; }
  .ring-screen-dialog h2 { max-width: 280px; font-size: 20px; }
  .screen-steps { grid-template-columns: 1fr 22px 1fr; }
  .screen-steps > span { font-size: 9px; }
  .screen-panel { padding: 14px 10px; }
  .card-calibration-stage { min-height: 354px; justify-content: center; }
  .card-calibration { aspect-ratio: 53.98 / 85.6; }
  .screen-ring-stage { min-height: 220px; }
  .screen-actions { flex-direction: column-reverse; }
  .screen-actions button { width: 100%; }
  .ring-tip-grid { grid-template-columns: 1fr; }
  .ring-systems { gap: 17px; border-radius: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .ring-method, .ring-step, .ring-related-grid a, .faq-plus { transition: none; }
}