/* =================================================================
   ATOM × Material 3 — page styles (foundations · components · brand · icons)
   ================================================================= */

/* shared spec grid */
.spec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:4px;padding:18px;
  background:var(--md-surface-container-low);border-radius:var(--md-shape-md)}

/* ===================== COLOR ===================== */
.source-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px}
.source-sw{display:inline-flex;align-items:center;gap:9px;padding:8px 16px 8px 10px;border-radius:var(--md-shape-full);
  border:1.5px solid var(--md-outline-variant);background:var(--md-surface);color:var(--md-on-surface);cursor:pointer;
  font-family:var(--md-font-brand);font-weight:600;font-size:13px;transition:border-color var(--md-dur-short),background var(--md-dur-short)}
.source-sw .source-dot{width:20px;height:20px;border-radius:50%;background:var(--c);box-shadow:inset 0 0 0 1px rgba(0,0,0,.08)}
.source-sw:hover{border-color:var(--md-outline)}
.source-sw.is-on{border-color:var(--md-primary);background:var(--md-primary-container);color:var(--md-on-primary-container)}
.source-sw.is-on .source-dot{box-shadow:inset 0 0 0 2px var(--md-on-primary-container)}
.source-preview{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding-top:20px;border-top:1px solid var(--md-outline-variant)}

.role-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.role-col{display:flex;flex-direction:column;border-radius:var(--md-shape-md);overflow:hidden}
.role-block{padding:14px;display:flex;flex-direction:column;justify-content:space-between;gap:18px}
.role-block.tall{min-height:96px}
.role-block.short{min-height:54px;gap:8px}
.role-block>span{font-family:var(--md-font-brand);font-weight:600;font-size:13px}
.role-block .token-copy{color:inherit;font-size:11px;opacity:.92}
.role-block .token-copy .md-i{opacity:.7}

.surface-row{display:grid;grid-template-columns:repeat(5,1fr);border-radius:var(--md-shape-md);overflow:hidden;border:1px solid var(--md-outline-variant)}
.surface-cell{padding:16px;min-height:124px;display:flex;flex-direction:column;justify-content:space-between;gap:10px}
.surface-cell>span{font-family:var(--md-font-brand);font-weight:600;font-size:12px}
.surface-cell .token-copy{color:inherit;font-size:10px;opacity:.8}

.atom-sw-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.atom-sw{display:flex;align-items:center;gap:14px;padding:10px;border-radius:var(--md-shape-md);
  border:1px solid var(--md-outline-variant);background:var(--md-surface-container-low);cursor:pointer;text-align:left;transition:border-color var(--md-dur-short)}
.atom-sw:hover{border-color:var(--md-primary)}
.atom-sw-chip{width:46px;height:46px;border-radius:10px;background:var(--c);border:1px solid rgba(7,9,82,.1);flex:0 0 auto}
.atom-sw-meta{display:flex;flex-direction:column;gap:2px;min-width:0}
.atom-sw-meta b{font-size:14px;font-weight:600;color:var(--md-on-surface)}
.atom-sw-meta code{font-family:var(--md-font-mono);font-size:12px;color:var(--md-on-surface-variant)}

.grad-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.grad-cell{height:110px;border-radius:var(--md-shape-md);display:flex;align-items:flex-end;padding:14px;color:#fff;font-family:var(--md-font-brand);font-weight:700}

/* ===================== TYPOGRAPHY ===================== */
.type-hero{display:flex;gap:28px;align-items:center;background:var(--md-surface-container-low);border-radius:var(--md-shape-lg);padding:28px;margin-top:8px;flex-wrap:wrap}
.type-hero-aa{font-family:var(--md-font-logotype);font-size:118px;line-height:.8;color:var(--md-primary)}
.type-hero-meta{min-width:240px}
.type-weights{display:flex;gap:20px;align-items:baseline;font-size:34px;color:var(--md-on-surface)}
.type-list{display:flex;flex-direction:column}
.type-row{display:flex;align-items:center;gap:24px;padding:16px;border:none;background:transparent;cursor:pointer;text-align:left;width:100%;border-bottom:1px solid var(--md-outline-variant);border-radius:var(--md-shape-sm)}
.type-row-meta{flex:0 0 188px;display:flex;flex-direction:column;gap:3px}
.type-row-meta b{font-size:14px;font-weight:600;color:var(--md-on-surface)}
.type-row-meta code{font-family:var(--md-font-mono);font-size:12px;color:var(--md-primary)}
.type-row-meta span{font-size:11px;color:var(--md-on-surface-variant)}
.type-row-sample{flex:1;color:var(--md-on-surface);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;min-width:0}

/* ===================== LAYOUT & SHAPE ===================== */
.space-list{display:flex;flex-direction:column;gap:10px}
.space-row{display:flex;align-items:center;gap:16px}
.space-row code{flex:0 0 76px;font-family:var(--md-font-mono);font-size:12px;color:var(--md-on-surface-variant)}
.space-bar{height:16px;background:var(--md-primary);border-radius:4px;min-width:4px}
.space-row>span{font-size:13px;color:var(--md-on-surface-variant)}

.shape-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:12px}
.shape-cell{display:flex;flex-direction:column;align-items:center;gap:8px;padding:14px;border:none;background:transparent;cursor:pointer;border-radius:var(--md-shape-md)}
.shape-box{width:100%;aspect-ratio:1;background:var(--md-primary-container);border:2px solid var(--md-primary)}
.shape-cell b{font-size:12px;color:var(--md-on-surface)}
.shape-cell code{font-size:11px;color:var(--md-on-surface-variant)}

/* ===================== ELEVATION ===================== */
.elev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:8px}
.elev-card{background:var(--md-surface-container-lowest);border-radius:var(--md-shape-lg);padding:22px;min-height:120px;
  display:flex;flex-direction:column;gap:4px;transition:transform var(--md-dur-medium) var(--md-ease-standard)}
.elev-card:hover{transform:translateY(-4px)}
.elev-card b{font-size:16px;font-weight:700;color:var(--md-on-surface)}
.elev-card code{font-size:12px;color:var(--md-primary);font-family:var(--md-font-mono)}
.elev-card span{font-size:13px;color:var(--md-on-surface-variant);margin-top:auto}

/* ===================== MOTION ===================== */
.motion-stage{position:relative;height:80px;background:var(--md-surface-container-lowest);border-radius:var(--md-shape-md);overflow:hidden}
.motion-dot{position:absolute;top:50%;margin-top:-18px;left:8px;height:36px;display:flex;align-items:center}
.motion-dot img{height:30px}
.motion-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.motion-curve{display:flex;flex-direction:column;gap:6px;padding:16px;border:1px solid var(--md-outline-variant);
  border-radius:var(--md-shape-md);background:var(--md-surface-container-low);cursor:pointer;text-align:left}
.curve-svg{width:100%;height:56px}
.curve-svg path{fill:none;stroke:var(--md-primary);stroke-width:2.5;stroke-linecap:round}
.motion-curve b{font-size:14px;font-weight:600;color:var(--md-on-surface)}
.motion-curve>span{font-size:12px;color:var(--md-on-surface-variant)}
.motion-curve code{font-size:11px;font-family:var(--md-font-mono);color:var(--md-primary)}
.dur-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.dur-cell{padding:20px;border-radius:var(--md-shape-md);background:var(--md-surface-container-low);border:none;cursor:pointer;display:flex;flex-direction:column;gap:4px;text-align:left}
.dur-cell b{font-family:var(--md-font-brand);font-weight:700;font-size:24px;color:var(--md-on-surface)}
.dur-cell>span{font-size:13px;color:var(--md-on-surface-variant)}
.dur-cell code{font-size:11px;font-family:var(--md-font-mono);color:var(--md-primary)}
/* native selects styled as buttons */
select.md-btn{appearance:none;-webkit-appearance:none;padding-right:36px;
  background-image:linear-gradient(45deg,transparent 50%,currentColor 50%),linear-gradient(135deg,currentColor 50%,transparent 50%);
  background-position:calc(100% - 18px) 18px,calc(100% - 13px) 18px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}

/* ===================== COMPONENTS ===================== */
.demo-col{display:flex;flex-direction:column;gap:16px}
.sel-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px 32px;max-width:560px}
.sel-row{display:flex;align-items:center;gap:14px;font-size:15px;color:var(--md-on-surface);cursor:pointer}
.sel-row>span{line-height:1.3}
.field-row{display:flex;gap:20px;flex-wrap:wrap}
.signin-card{width:360px;max-width:100%;padding:28px;display:flex;flex-direction:column;align-items:flex-start}
.badge-host{position:relative;display:inline-flex;color:var(--md-on-surface)}
.badge-host>.md-i{width:28px;height:28px}
.badge-host .md-badge{position:absolute;top:-4px;right:-6px}
.tip-host{position:relative;display:inline-flex}
.md-tip{position:absolute;bottom:calc(100% + 6px);left:50%;transform:translateX(-50%) translateY(4px);
  background:var(--md-inverse-surface);color:var(--md-inverse-on-surface);padding:5px 10px;border-radius:6px;
  font-size:12px;font-weight:500;white-space:nowrap;opacity:0;pointer-events:none;transition:all var(--md-dur-short) var(--md-ease-standard)}
.tip-host:hover .md-tip{opacity:1;transform:translateX(-50%) translateY(0)}
.md-tabs{display:flex;gap:4px;border-bottom:1px solid var(--md-outline-variant)}
.md-tab{--state:var(--md-primary);position:relative;border:none;background:transparent;padding:14px 20px;
  font-family:var(--md-font-brand);font-weight:600;font-size:14px;color:var(--md-on-surface-variant);cursor:pointer;border-radius:var(--md-shape-sm) var(--md-shape-sm) 0 0}
.md-tab.is-active{color:var(--md-primary)}
.md-tab.is-active::after{content:"";position:absolute;left:16px;right:16px;bottom:-1px;height:3px;background:var(--md-primary);border-radius:3px 3px 0 0}
.md-tab-panel{padding:20px 4px;font-size:15px;line-height:1.6;color:var(--md-on-surface-variant);max-width:60ch}

/* ===================== BRAND: LOGO ===================== */
.logo-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.logo-cell{border-radius:var(--md-shape-lg);padding:48px;display:flex;align-items:center;justify-content:center;position:relative;min-height:168px}
.logo-cell.light{background:var(--md-surface-container-low);border:1px solid var(--md-outline-variant)}
.logo-cell.dark{background:var(--atom-deep-blue)}
.logo-cell img{height:50px}
.logo-tag{position:absolute;bottom:12px;left:16px;font-size:12px;font-weight:600;color:var(--md-on-surface-variant)}
.logo-cell.dark .logo-tag{color:rgba(255,255,255,.6)}
.conv-show{display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center}
.conv-big{background:var(--md-surface-container-low);border-radius:var(--md-shape-lg);padding:56px;display:flex;align-items:center;justify-content:center}
.conv-big img{width:220px}
.conv-rules{display:flex;flex-direction:column;gap:16px}
.conv-rule{display:flex;gap:14px;align-items:flex-start}
.conv-rule .md-i{width:22px;height:22px;color:var(--md-primary);flex:0 0 auto;margin-top:2px}
.conv-rule b{display:block;font-size:15px;color:var(--md-on-surface)}
.conv-rule span{font-size:13px;color:var(--md-on-surface-variant)}
.dont-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.dont-cell{display:flex;flex-direction:column;gap:10px}
.dont-art{background:var(--md-surface-container-high);border-radius:var(--md-shape-md);height:140px;display:flex;align-items:center;justify-content:center}
.dont-art img{width:120px}
.dont-cell>span{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--md-on-surface-variant)}
.dont-cell>span .md-i{width:16px;height:16px;color:var(--md-error)}

/* ===================== BRAND: SUPERGRAPHICS ===================== */
.super-banner{position:relative;border-radius:var(--md-shape-lg);overflow:hidden;background:var(--atom-deep-blue);min-height:200px;display:flex;align-items:center;padding:40px}
.super-bands{position:absolute;inset:0;display:flex}
.super-bands span{flex:1;transform:skewX(-14deg) scaleX(1.4);opacity:.9}
.super-banner::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,var(--atom-deep-blue) 18%,transparent 70%)}
.super-banner-text{position:relative;z-index:1;color:#fff}
.super-banner-text h2{font-family:var(--md-font-brand);font-weight:800;font-size:34px;margin:8px 0 0}
.super-tiles{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.super-tile{position:relative;border-radius:var(--md-shape-lg);padding:24px;min-height:200px;display:flex;flex-direction:column;color:#fff;text-decoration:none;overflow:hidden;cursor:pointer;transition:transform var(--md-dur-medium) var(--md-ease-standard)}
.super-tile:hover{transform:translateY(-4px)}
.st-tag{font-size:11px;letter-spacing:.1em;font-weight:700;opacity:.8;margin-bottom:auto}
.super-tile b{font-family:var(--md-font-brand);font-weight:800;font-size:26px;margin-top:12px}
.super-tile p{font-size:14px;opacity:.9;margin:6px 0 0;max-width:82%;position:relative;z-index:1}
.st-conv{position:absolute;right:-16px;bottom:-10px;width:118px;opacity:.35}

/* ===================== BRAND: VOICE ===================== */
.voice-cols{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.voice-col{border-radius:var(--md-shape-lg);padding:24px}
.voice-col.are{background:var(--md-success-container);color:var(--md-on-success-container)}
.voice-col.arent{background:var(--md-surface-container-high);color:var(--md-on-surface)}
.voice-col h4{display:flex;align-items:center;gap:8px;margin:0 0 14px;font-family:var(--md-font-brand);font-size:16px}
.voice-col h4 .md-i{width:20px;height:20px}
.voice-col.arent h4 .md-i{color:var(--md-error)}
.voice-col ul{margin:0;padding-left:20px;columns:2;font-size:14px;line-height:1.9}
.dodont{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.dd-card{display:flex;gap:12px;padding:18px;border-radius:var(--md-shape-md);align-items:flex-start}
.dd-card.do{background:var(--md-success-container);color:var(--md-on-success-container)}
.dd-card.dont{background:var(--md-error-container);color:var(--md-on-error-container)}
.dd-card .md-i{width:22px;height:22px;flex:0 0 auto;margin-top:2px}
.dd-label{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;opacity:.8}
.dd-card p{margin:4px 0 0;font-size:15px;line-height:1.5}
.slogan-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.slogan-cell{background:var(--grad-primary);border-radius:var(--md-shape-md);padding:22px;color:#fff;display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.slogan-cell b{font-family:var(--md-font-brand);font-weight:800;font-size:22px}
.slogan-cell span{font-family:var(--md-font-brand);font-weight:800;font-size:22px;color:var(--atom-cyan)}

/* ===================== ICONS ===================== */
.icon-spec{display:flex;flex-direction:column;align-items:center;gap:8px;font-size:12px;color:var(--md-on-surface-variant)}
.icon-spec-ic .md-i{width:28px;height:28px}
.icon-spec-rule{display:flex;align-items:center;gap:8px;margin-left:auto;font-size:13px;color:var(--md-on-surface-variant)}
.icon-spec-rule .md-i{width:18px;height:18px}
.icon-search{display:flex;align-items:center;gap:10px;height:48px;padding:0 18px;background:var(--md-surface-container-high);border-radius:var(--md-shape-full);margin-bottom:20px}
.icon-search .md-i{width:20px;height:20px;color:var(--md-on-surface-variant)}
.icon-search input{flex:1;border:none;background:transparent;outline:none;font-family:var(--md-font-plain);font-size:14px;color:var(--md-on-surface)}
.icon-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}
.icon-cell{display:flex;flex-direction:column;align-items:center;gap:10px;padding:18px 8px;border:1px solid var(--md-outline-variant);
  border-radius:var(--md-shape-md);background:var(--md-surface-container-low);cursor:pointer;transition:border-color var(--md-dur-short)}
.icon-cell .md-i{width:24px;height:24px;color:var(--md-on-surface)}
.icon-cell span{font-size:11px;color:var(--md-on-surface-variant);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:100%}
.icon-cell:hover{border-color:var(--md-primary)}
.icon-cell:hover .md-i,.icon-cell:hover span{color:var(--md-primary)}
.icon-empty{text-align:center;color:var(--md-on-surface-variant);padding:32px}

/* ===================== responsive ===================== */
@media(max-width:1080px){
  .role-grid{grid-template-columns:repeat(2,1fr)}
  .surface-row{grid-template-columns:repeat(2,1fr)}
  .grad-grid{grid-template-columns:repeat(3,1fr)}
  .shape-grid{grid-template-columns:repeat(4,1fr)}
  .icon-grid{grid-template-columns:repeat(4,1fr)}
  .motion-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:760px){
  .atom-sw-grid{grid-template-columns:1fr}
  .elev-grid,.super-tiles,.dont-grid{grid-template-columns:1fr}
  .logo-grid,.conv-show,.voice-cols,.dodont,.slogan-grid,.spec-grid{grid-template-columns:1fr}
  .icon-grid{grid-template-columns:repeat(3,1fr)}
  .type-row{flex-direction:column;align-items:flex-start;gap:8px}
  .type-row-meta{flex:none}
}