:root{--bg: #f5f5f5;--surface: #ffffff;--primary: #1b5e20;--primary-dark: #0d3d12;--text: #1a1a1a;--muted: #666;--error: #c62828;--mines: #c62828;--time: #1b5e20;--cell-hidden: #bdbdbd;--cell-revealed: #e0e0e0;--radius: 12px;--shadow: 0 2px 8px rgba(0, 0, 0, .08);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.5;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0;min-height:100dvh}#root{min-height:100dvh}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer;border:none;background:none}.app-shell{min-height:100dvh;display:flex;flex-direction:column}.app-footer{text-align:center;padding:12px;font-size:.75rem;color:var(--muted);display:flex;flex-direction:column;align-items:center;gap:10px}.support-slot{width:100%;max-width:720px;margin:0 auto;min-height:100px;overflow:hidden;background:#dcdcdc;border:2px dashed #888;border-radius:8px;display:flex;align-items:center;justify-content:center}.support-slot__msg{margin:0;padding:12px 16px;font-size:.8rem;line-height:1.4;color:var(--muted);text-align:center}.support-slot--article{margin:16px 0;max-width:none}.support-slot--article-bottom{margin-top:28px}.content-page{padding-bottom:32px}.content-nav{display:flex;flex-wrap:wrap;gap:12px;margin:0 0 8px;font-size:.9rem}.content-nav a{color:var(--primary, #1b5e20);text-decoration:underline;text-underline-offset:2px}.prose{line-height:1.65;font-size:1.02rem}.prose h2{margin:1.6rem 0 .6rem;font-size:1.2rem}.prose p,.prose ul,.prose ol{margin:0 0 .9rem}.prose li{margin-bottom:.35rem}.prose a{color:var(--primary, #1b5e20);text-decoration:underline;text-underline-offset:2px}.blog-list{list-style:none;padding:0;margin:1rem 0 0}.blog-list li{padding:14px 0;border-bottom:1px solid rgba(0,0,0,.08)}.blog-list p{margin:6px 0 0;color:var(--muted);font-size:.95rem}.content-footnote{margin-top:24px;font-size:.9rem}.cookie-bar{position:fixed;z-index:1000;left:12px;right:12px;bottom:12px;max-width:520px;margin:0 auto;padding:14px 16px;background:var(--surface);color:var(--text);border-radius:var(--radius);box-shadow:0 8px 28px #0000002e;display:flex;flex-direction:column;gap:12px}.cookie-bar__text{margin:0;font-size:.9rem;line-height:1.45}.cookie-bar__text a{color:var(--primary);text-decoration:underline}.cookie-bar__actions{display:flex;justify-content:flex-end;gap:8px;flex-wrap:wrap}.cookie-bar__btn{padding:8px 14px;border-radius:8px;font-weight:600}.cookie-bar__btn--ghost{background:transparent;color:var(--muted);border:1px solid color-mix(in srgb,var(--muted) 35%,transparent)}.cookie-bar__btn--primary{background:var(--primary);color:#fff}.cookie-bar__btn--primary:hover{background:var(--primary-dark)}.page{flex:1;display:flex;flex-direction:column;max-width:720px;margin:0 auto;width:100%;padding:0 12px 16px}.page--game{max-width:none;height:100dvh;padding:0}.page-header{display:grid;grid-template-columns:48px 1fr 48px;align-items:center;padding:8px 0}.page-header h1{margin:0;text-align:center;font-size:1.25rem}.btn-icon{width:48px;height:48px;display:flex;align-items:center;justify-content:center;font-size:1.25rem;border-radius:50%}.btn-icon:hover{background:#0000000f}.btn-icon-placeholder{width:48px}.menu-page{justify-content:center;gap:24px;padding-top:24px}.menu-hero{text-align:center}.menu-hero__icon{font-size:3rem}.menu-hero h1{margin:8px 0 4px;font-size:1.75rem}.menu-hero__tagline{margin:0;color:var(--muted)}.menu-rating{text-align:center;margin:0}.menu-nav{display:flex;flex-direction:column;gap:10px}.menu-btn{display:flex;flex-direction:column;padding:16px 20px;background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .1s,box-shadow .1s}.menu-btn:hover:not(.menu-btn--disabled){transform:translateY(-1px);box-shadow:0 4px 12px #0000001f}.menu-btn--disabled{opacity:.55;cursor:not-allowed}.menu-btn__label{font-weight:600;font-size:1.1rem}.menu-btn__sub{font-size:.85rem;color:var(--muted);margin-top:2px}.difficulty-list{display:flex;flex-direction:column;gap:10px;margin-top:8px}.muted{color:var(--muted);font-size:.9rem}.error{color:var(--error)}.game-hud{display:grid;grid-template-columns:48px auto 1fr auto auto auto 48px;align-items:center;gap:4px;padding:8px 4px;background:var(--surface);box-shadow:var(--shadow);flex-shrink:0}.hud-counter{font-family:ui-monospace,monospace;font-weight:700;font-size:1.1rem;padding:4px 6px}.hud-counter--mines{color:var(--mines)}.hud-counter--time{color:var(--time)}.hud-center{text-align:center;line-height:1.2}.hud-center strong{display:block;font-size:.95rem}.hud-center small{color:var(--muted);font-size:.7rem}.hud-zoom{display:flex;align-items:center;gap:0}.hud-zoom .btn-icon{width:36px;height:36px;font-size:1.35rem;font-weight:600;line-height:1}.hud-zoom .btn-icon:disabled{opacity:.35;cursor:default}.mode-toggle{width:40px;height:40px;border-radius:50%;font-size:1.25rem;display:flex;align-items:center;justify-content:center}.mode-toggle--active{outline:2px solid var(--primary)}.game-result{text-align:center;margin:4px 0;font-weight:600;flex-shrink:0}.game-result--win{color:var(--primary)}.game-result--lose{color:var(--error)}.game-best{text-align:center;margin:0;flex-shrink:0}.game-loading{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:24px;text-align:center}.game-loading__spinner{width:40px;height:40px;border:3px solid #c8e6c9;border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.ranked-panel{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center;padding:24px 12px;max-width:420px;margin:0 auto;width:100%}.ranked-panel h1{margin:0;font-size:1.75rem}.ranked-panel__eyebrow{margin:0;text-transform:uppercase;letter-spacing:.06em;font-size:.75rem;color:var(--muted)}.ranked-panel .menu-btn{width:100%}.ranked-countdown{font-size:4rem;font-weight:700;line-height:1;color:var(--primary);font-variant-numeric:tabular-nums}.ranked-opponent{margin:0}.ranked-rating{margin:0;font-size:1.1rem}.delta-up{color:var(--primary)}.delta-down{color:var(--error)}.ranked-board-wrap{flex:1;min-height:0;position:relative;display:flex;flex-direction:column}.ranked-board-wrap .board-viewport{flex:1}.ranked-overlay{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:#f5f5f5d1;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:2}.board-viewport{flex:1;overflow:hidden;position:relative;touch-action:none;display:flex;align-items:center;justify-content:center;min-height:0}.board-transform{transform-origin:center center;will-change:transform}.board-grid{display:grid;gap:1px;background:#9e9e9e;border:2px solid #757575}.board-hint{position:absolute;bottom:4px;left:0;right:0;text-align:center;font-size:.65rem;color:var(--muted);pointer-events:none;margin:0}.cell{display:flex;align-items:center;justify-content:center;background:var(--cell-hidden);font-weight:700;padding:0;-webkit-user-select:none;user-select:none}.cell:active{filter:brightness(.95)}.cell--revealed{background:var(--cell-revealed)}.cell--flagged{background:#ffcdd2}.cell--mine{background:#ef9a9a}.leaderboard{list-style:none;padding:0;margin:0}.leaderboard__row{display:grid;grid-template-columns:36px 1fr auto auto;gap:8px;padding:10px 8px;border-bottom:1px solid #e0e0e0;align-items:center}.leaderboard__rank{font-weight:700;color:var(--primary)}.leaderboard__rating{font-weight:600}.records-list{list-style:none;padding:0;margin:0}.records-list__row{display:flex;justify-content:space-between;padding:12px 8px;border-bottom:1px solid #e0e0e0}.records-note{margin-top:16px}.settings-list{display:flex;flex-direction:column;gap:8px}.menu-account-link{color:var(--primary);text-decoration:underline;text-underline-offset:2px}.setting-row--link{text-decoration:none;color:inherit;cursor:pointer}.setting-row--link:hover{box-shadow:0 4px 12px #0000001f}.setting-chevron{color:var(--muted);font-size:1.25rem}.auth-page{display:flex;flex-direction:column;gap:14px;max-width:420px;margin:0 auto;width:100%;padding-bottom:24px}.auth-intro{margin:0;text-align:center}.auth-current{display:flex;flex-direction:column;gap:4px;padding:14px 12px;background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow)}.auth-ok{color:var(--primary);margin:0}.auth-google-wrap{display:flex;flex-direction:column;align-items:center;gap:8px;min-height:44px}.auth-google-btn{display:flex;justify-content:center;width:100%}.auth-divider{display:flex;align-items:center;gap:12px;color:var(--muted);font-size:.85rem}.auth-divider:before,.auth-divider:after{content:"";flex:1;height:1px;background:#e0e0e0}.auth-tabs{display:grid;grid-template-columns:1fr 1fr;gap:4px;background:#e8e8e8;padding:4px;border-radius:var(--radius)}.auth-tab{padding:10px;border-radius:8px;font-weight:600;color:var(--muted)}.auth-tab--active{background:var(--surface);color:var(--text);box-shadow:var(--shadow)}.auth-form{display:flex;flex-direction:column;gap:12px}.auth-field{display:flex;flex-direction:column;gap:4px;font-size:.9rem}.auth-field input{font:inherit;padding:12px 14px;border:1px solid #cfcfcf;border-radius:10px;background:var(--surface)}.auth-field input:focus{outline:2px solid var(--primary);outline-offset:1px}.auth-submit{margin-top:4px}.auth-actions{display:flex;flex-direction:column;gap:10px}.setting-row{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:14px 12px;background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow)}.setting-row p{margin:4px 0 0}.setting-row input[type=checkbox]{width:20px;height:20px;accent-color:var(--primary)}.setting-select{max-width:11rem;padding:6px 8px;border-radius:8px;border:1px solid color-mix(in srgb,var(--muted) 35%,transparent);background:var(--bg);color:inherit;font:inherit}@media(max-width:480px){.game-hud{grid-template-columns:40px minmax(0,auto) 1fr minmax(0,auto) auto auto 40px;font-size:.9rem}.hud-counter{font-size:.95rem}}