@layer theme{:root,:host{--color-white:#fff;--spacing:.25rem;--container-xl:36rem;--default-font-family:"Pretendard";--default-mono-font-family:"Pretendard"}}@layer base{*,:after,:before,::backdrop{box-sizing:border-box;border:0 solid;margin:0;padding:0}::file-selector-button{box-sizing:border-box;border:0 solid;margin:0;padding:0}html,:host{-webkit-text-size-adjust:100%;tab-size:4;line-height:1.5;font-family:var(--default-font-family,ui-sans-serif, system-ui, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji");font-feature-settings:var(--default-font-feature-settings,normal);font-variation-settings:var(--default-font-variation-settings,normal);-webkit-tap-highlight-color:transparent}hr{height:0;color:inherit;border-top-width:1px}abbr:where([title]){-webkit-text-decoration:underline dotted;text-decoration:underline dotted}h1,h2,h3,h4,h5,h6{font-size:inherit;font-weight:inherit}a{color:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;-webkit-text-decoration:inherit;text-decoration:inherit}b,strong{font-weight:bolder}code,kbd,samp,pre{font-family:var(--default-mono-font-family,ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace);font-feature-settings:var(--default-mono-font-feature-settings,normal);font-variation-settings:var(--default-mono-font-variation-settings,normal);font-size:1em}small{font-size:80%}sub,sup{vertical-align:baseline;font-size:75%;line-height:0;position:relative}sub{bottom:-.25em}sup{top:-.5em}table{text-indent:0;border-color:inherit;border-collapse:collapse}:-moz-focusring{outline:auto}progress{vertical-align:baseline}summary{display:list-item}ol,ul,menu{list-style:none}img,svg,video,canvas,audio,iframe,embed,object{vertical-align:middle;display:block}img,video{max-width:100%;height:auto}button,input,select,optgroup,textarea{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}::file-selector-button{font:inherit;font-feature-settings:inherit;font-variation-settings:inherit;letter-spacing:inherit;color:inherit;opacity:1;background-color:#0000;border-radius:0}:where(select:is([multiple],[size])) optgroup{font-weight:bolder}:where(select:is([multiple],[size])) optgroup option{padding-inline-start:20px}::file-selector-button{margin-inline-end:4px}::placeholder{opacity:1}@supports (not ((-webkit-appearance:-apple-pay-button))) or (contain-intrinsic-size:1px){::placeholder{color:currentColor}@supports (color:color-mix(in lab, red, red)){::placeholder{color:color-mix(in oklab, currentcolor 50%, transparent)}}}textarea{resize:vertical}::-webkit-search-decoration{-webkit-appearance:none}::-webkit-date-and-time-value{min-height:1lh;text-align:inherit}::-webkit-datetime-edit{display:inline-flex}::-webkit-datetime-edit-fields-wrapper{padding:0}::-webkit-datetime-edit{padding-block:0}::-webkit-datetime-edit-year-field{padding-block:0}::-webkit-datetime-edit-month-field{padding-block:0}::-webkit-datetime-edit-day-field{padding-block:0}::-webkit-datetime-edit-hour-field{padding-block:0}::-webkit-datetime-edit-minute-field{padding-block:0}::-webkit-datetime-edit-second-field{padding-block:0}::-webkit-datetime-edit-millisecond-field{padding-block:0}::-webkit-datetime-edit-meridiem-field{padding-block:0}::-webkit-calendar-picker-indicator{line-height:1}:-moz-ui-invalid{box-shadow:none}button,input:where([type=button],[type=reset],[type=submit]){appearance:button}::file-selector-button{appearance:button}::-webkit-inner-spin-button{height:auto}::-webkit-outer-spin-button{height:auto}[hidden]:where(:not([hidden=until-found])){display:none!important}}@layer components;@layer utilities{.start{inset-inline-start:var(--spacing)}.flex{display:flex}.hidden{display:none}.table{display:table}.h-full{height:100%}.min-h-full{min-height:100%}.min-h-screen{min-height:100vh}.w-full{width:100%}.max-w-\[390px\]{max-width:390px}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.overflow-hidden{overflow:hidden}.bg-white{background-color:var(--color-white)}.px-5{padding-inline:calc(var(--spacing) * 5)}.pt-10{padding-top:calc(var(--spacing) * 10)}.pb-32{padding-bottom:calc(var(--spacing) * 32)}.text-center{text-align:center}.text-\[\#1f2933\]{color:#1f2933}.antialiased{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}@media (min-width:40rem){.sm\:max-w-xl{max-width:var(--container-xl)}}}:root{--background:#fff;--foreground:#1f2933}body{background:var(--background);color:var(--foreground);font-family:Pretendard,-apple-system,BlinkMacSystemFont,system-ui,sans-serif}button,input{font:inherit}.audio-effect-layer{z-index:5;background:radial-gradient(circle at 50% 52%, rgba(125, 166, 188, calc(.08 + var(--audio-level,0) * .56)), transparent 42%), radial-gradient(circle at 18% 80%, rgba(125, 166, 188, calc(.055 + var(--audio-level,0) * .42)), transparent 36%), radial-gradient(circle at 82% 20%, rgba(31, 41, 51, calc(.028 + var(--audio-level,0) * .22)), transparent 34%);opacity:calc(.58 + var(--audio-level,0) * .4);pointer-events:none;transform:scale(calc(1 + var(--audio-level,0) * .14));transition:opacity 55ms linear,transform 55ms linear;position:fixed;inset:0}.ripple-layer{z-index:10;pointer-events:none;position:fixed;inset:0;overflow:hidden}.water-ripple{filter:blur(.2px);opacity:0;width:24px;height:18px;transform:translate(-50%, -50%) scale(.2) rotate(var(--ripple-rotation,-8deg));background:radial-gradient(#7da6bc24 0%,#7da6bc12 34%,#0000 68%),radial-gradient(#0000 48%,#1f293321 52%,#0000 60%);border:0;border-radius:999px;animation:1.4s cubic-bezier(.16,.72,.2,1) forwards water-ripple;position:absolute}.water-ripple:before,.water-ripple:after{border-radius:inherit;content:"";opacity:0;background:radial-gradient(#0000 48%,#1f29331a 53%,#0000 63%);border:0;animation:1.4s cubic-bezier(.16,.72,.2,1) forwards water-ripple-ring;position:absolute;inset:-8px -12px;transform:scale(.74)rotate(10deg)}.water-ripple:after{opacity:0;animation-delay:.14s;inset:-16px -24px;transform:scale(.5)rotate(-14deg)}.intro-screen{z-index:100;color:#1f2933;pointer-events:none;background:#fff;justify-content:center;align-items:center;padding:2.5rem 1.25rem 8rem;animation:.7s 3.5s forwards intro-bg-release;display:flex;position:fixed;inset:0;overflow:hidden}.intro-screen.is-done{pointer-events:none;background:0 0}.intro-mask{z-index:1;background:linear-gradient(#1f2933 0 0) top/100% 50% no-repeat,linear-gradient(#1f2933 0 0) bottom/100% 50% no-repeat;animation:.9s cubic-bezier(.65,0,.35,1) 2.1s forwards intro-mask-open;position:absolute;inset:0}.intro-screen.is-done .intro-mask,.intro-screen.is-done .intro-copy{display:none}.intro-copy{z-index:2;animation:.42s 1.5s forwards intro-copy-out;position:absolute;transform:translateY(0)}.intro-small{color:#fff;white-space:nowrap;font-size:clamp(1.7rem,8vw,3rem);font-weight:700;line-height:1}.intro-title{z-index:0;color:#1f2933;cursor:default;text-align:center;white-space:nowrap;background:0 0;border:0;place-items:center;width:max-content;max-width:calc(100vw - 40px);min-height:96px;padding:0 20px;font-size:clamp(1.7rem,8vw,3rem);font-weight:600;line-height:1.12;display:grid;position:relative}.intro-title.is-done{pointer-events:auto}.handwrite-track{letter-spacing:0;white-space:nowrap;grid-area:1/1;justify-content:center;align-items:center;width:max-content;max-width:100%;min-height:96px;font-family:Pretendard,-apple-system,BlinkMacSystemFont,system-ui,sans-serif;font-size:clamp(1.7rem,8vw,3rem);font-weight:600;line-height:1.12;display:inline-flex;position:relative}.title-letter{opacity:0;animation:.42s forwards title-letter-in;display:inline-block;transform:translateY(10px)}.intro-title.is-done .title-letter{opacity:1;animation:none;transform:translateY(0)}.enter-letter-button{color:#1f2933;cursor:pointer;opacity:0;background:#fff;border:1px solid #1f2933;border-radius:999px;min-width:112px;height:42px;padding:0 22px;font-size:.95rem;font-weight:600;transition:background-color .18s,color .18s,transform .18s;animation:.52s forwards enter-button-in;position:absolute;top:calc(50% + 58px);left:50%;transform:translate(-50%,8px)}.enter-letter-button:hover,.enter-letter-button:focus-visible{color:#fff;background:#1f2933}.enter-letter-button:active{transform:translate(-50%,1px)}.gate-panel{width:100%;max-width:300px;animation:.7s both rise-in}.birthday-input{color:#1f2933;letter-spacing:.24em;text-align:center;background:0 0;border:0;border-bottom:1px solid #b8c8d1;border-radius:0;outline:none;width:100%;height:58px;padding:0 8px;font-size:1.55rem;font-weight:500;transition:border-color .18s,color .18s}.birthday-input::placeholder{color:#b8c8d1}.birthday-input:focus{border-color:#7da6bc}.birthday-input.has-error{border-color:#b14a3d;animation:.26s input-shake}.enter-button{color:#fff;cursor:pointer;background:#1f2933;border:1px solid #1f2933;border-radius:999px;width:100%;height:48px;margin-top:28px;font-weight:600;transition:background-color .18s,color .18s,transform .18s}.enter-button:hover,.enter-button:focus-visible{color:#1f2933;background:#fff}.enter-button:active{transform:translateY(1px)}.letter-reader{z-index:130;pointer-events:none;grid-template-columns:64px minmax(0,1fr) 64px;align-items:center;padding:96px 0 128px;display:grid;position:fixed;inset:0}.letter-page{text-align:center;pointer-events:none;justify-content:center;align-items:center;min-width:0;display:flex}.letter-page-line{color:#1f2933;opacity:0;word-break:keep-all;max-width:760px;text-shadow:0 0 calc(8px + var(--audio-level,0) * 76px) #7da6bc8a, 0 0 calc(2px + var(--audio-level,0) * 42px) #1f293333;margin:0;font-size:clamp(1.15rem,4.6vw,1.5rem);font-weight:500;line-height:1.85;animation:.9s forwards letter-line-in;transform:translateY(18px)}.letter-nav-button{color:#1f293375;cursor:pointer;pointer-events:auto;background:0 0;border:0;border-radius:0;align-self:center;place-items:center;width:64px;height:96px;transition:color .18s,opacity .18s,transform .18s;display:grid}.letter-nav-prev{grid-column:1}.letter-nav-next{grid-column:3}.letter-nav-button:disabled{cursor:default;opacity:0}.letter-nav-button:not(:disabled):hover,.letter-nav-button:not(:disabled):focus-visible{color:#1f2933e6}.letter-nav-button:not(:disabled):active{transform:scale(.96)}.music-player{right:16px;bottom:max(18px, env(safe-area-inset-bottom));z-index:120;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);max-width:calc(100vw - 32px);height:48px;transform:scale(calc(1 + var(--audio-level,0) * .095));transform-origin:100% 100%;background:#ffffffeb;border:1px solid #b8cdd8db;border-radius:999px;align-items:center;gap:6px;padding:4px 4px 4px 14px;transition:transform 55ms linear;display:flex;position:fixed}.music-title{color:#1f2933;text-overflow:ellipsis;white-space:nowrap;max-width:132px;font-size:.875rem;font-weight:600;line-height:1;overflow:hidden}.music-skip,.music-toggle{cursor:pointer;border:0;border-radius:999px;flex:none;place-items:center;transition:opacity .18s,transform .18s;display:grid;position:relative}.music-skip{color:#1f2933;background:0 0;width:34px;height:34px}.music-toggle{color:#fff;background:#1f2933;width:40px;height:40px}.music-toggle[aria-disabled=true]{opacity:.72}.music-skip:active,.music-toggle:active{transform:scale(.96)}@media (min-width:640px){.intro-title{max-width:calc(100vw - 80px);min-height:132px;font-size:clamp(3rem,6vw,4.5rem)}.handwrite-track{width:max-content;max-width:100%;min-height:132px;font-size:clamp(3rem,6vw,4.5rem)}.enter-letter-button{top:calc(50% + 78px)}.gate-panel{width:min(100%,320px)}.letter-page-line{font-size:1.55rem;line-height:1.9}.letter-reader{grid-template-columns:96px minmax(0,1fr) 96px}.letter-nav-button{width:96px}.music-player{bottom:28px;right:28px}.music-title{max-width:180px}}@keyframes rise-in{0%{opacity:0;transform:translateY(18px)}to{opacity:1;transform:translateY(0)}}@keyframes water-ripple{0%{opacity:.72;transform:translate(-50%,-50%)scale(.2)rotate(-8deg)}58%{opacity:.2}to{opacity:0;transform:translate(-50%,-50%)scale(13)rotate(6deg)}}@keyframes water-ripple-ring{0%{opacity:.34;transform:scale(.7)}to{opacity:0;transform:scale(1.35)}}@keyframes input-shake{0%,to{transform:translate(0)}25%{transform:translate(-4px)}75%{transform:translate(4px)}}@keyframes letter-line-in{to{opacity:1;transform:translateY(0)}}@keyframes intro-copy-out{to{opacity:0;transform:translateY(-18px)}}@keyframes intro-mask-open{to{background-size:100% 0,100% 0}}@keyframes title-letter-in{to{opacity:1;transform:translateY(0)}}@keyframes enter-button-in{to{opacity:1;transform:translate(-50%)}}@keyframes intro-bg-release{to{background-color:#0000}}