:root {
  --paper: #f3ead8;
  --paper-soft: #fff8ea;
  --paper-dark: #e7dcc3;
  --ink: #2b2118;
  --ink-soft: #6b5a47;
  --border: #b8a480;
  --border-soft: rgba(184, 164, 128, 0.45);
  --wax: #8b2f24;
  --wax-light: #c95848;
  --wax-mid: #9b3428;
  --wax-dark: #52130f;
  --wax-shadow: rgba(82, 19, 15, 0.38);
  --shadow: rgba(43, 33, 24, 0.12);
  --shadow-strong: rgba(43, 33, 24, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 16% 18%, rgba(139, 47, 36, 0.055), transparent 28%),
    radial-gradient(circle at 84% 8%, rgba(90, 75, 58, 0.07), transparent 24%),
    radial-gradient(circle at 50% 100%, rgba(255, 255, 255, 0.22), transparent 34%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.22), rgba(0, 0, 0, 0.035)),
    var(--paper);
  font-family: "EB Garamond", Georgia, "Times New Roman", serif;
  font-size: 18px;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1,
h2,
h3 {
  margin: 0 0 0.75rem;
  font-family: "IM Fell English", Georgia, serif;
  font-weight: 400;
  letter-spacing: 0.02em;
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.45rem;
}

p {
  margin: 0 0 1rem;
}

img {
  max-width: 100%;
  height: auto;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

input,
textarea,
select {
  width: 100%;
  padding: 0.75rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.35);
  outline: none;
  appearance: none;
}

input:focus,
textarea:focus,
select:focus {
  border-color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.58);
  box-shadow: 0 0 0 3px rgba(107, 90, 71, 0.12);
}

textarea {
  min-height: 12rem;
  resize: vertical;
}

select {
  background-image:
    linear-gradient(45deg, transparent 50%, var(--ink-soft) 50%),
    linear-gradient(135deg, var(--ink-soft) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) calc(50% + 1px),
    calc(100% - 12px) calc(50% + 1px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 2.25rem;
}

button {
  padding: 0.7rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 2px;
  background: var(--paper-soft);
  cursor: pointer;
  box-shadow: 0 2px 0 rgba(43, 33, 24, 0.08);
  transition:
    transform 140ms ease,
    background 140ms ease,
    box-shadow 140ms ease,
    border-color 140ms ease;
}

button:hover {
  background: #fffaf0;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px var(--shadow);
}

button:active {
  transform: translateY(0);
  box-shadow: 0 1px 0 rgba(43, 33, 24, 0.08);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

button.primary,
.button-link.primary {
  background: var(--wax);
  border-color: var(--wax-dark);
  color: #fff3e8;
}

button.primary:hover,
.button-link.primary:hover {
  background: #9d382c;
}

button.secondary {
  background: rgba(255, 255, 255, 0.35);
}

button.danger {
  background: #7a2b24;
  border-color: #5b1e19;
  color: #fff3e8;
}

label {
  display: grid;
  gap: 0.4rem;
  font-weight: 600;
}

.stack {
  display: grid;
  gap: 1rem;
}

.row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.muted,
.status {
  color: var(--ink-soft);
}

.status {
  min-height: 1.5rem;
  font-style: italic;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 248, 234, 0.72);
  backdrop-filter: blur(8px);
}

.brand {
  font-family: "IM Fell English", Georgia, serif;
  font-size: 1.35rem;
  letter-spacing: 0.03em;
}

.nav {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.page {
  width: min(1000px, calc(100% - 2rem));
  margin: 2rem auto 4rem;
}

.page.narrow {
  width: min(760px, calc(100% - 2rem));
}

.center-card {
  width: min(480px, calc(100% - 2rem));
  margin: 8vh auto;
  padding: 2rem;
  border: 1px solid var(--border);
  background: rgba(255, 248, 234, 0.62);
  box-shadow: 0 18px 50px var(--shadow);
  text-align: center;
}

.card,
.state-card,
.notice-card,
.latest-card,
.welcome-card,
.gate-card {
  padding: 1.25rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
  background: rgba(255, 248, 234, 0.52);
  box-shadow: 0 10px 30px var(--shadow);
}

.state-text {
  font-style: italic;
  color: var(--ink-soft);
}

.button-link {
  display: inline-block;
  padding: 0.7rem 1.1rem;
  border: 1px solid var(--border);
  background: var(--paper-soft);
  box-shadow: 0 2px 0 rgba(43, 33, 24, 0.08);
  transition:
    transform 140ms ease,
    background 140ms ease,
    box-shadow 140ms ease;
}

.button-link:hover {
  background: #fffaf0;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 10px var(--shadow);
}

.actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.wax-seal {
  position: relative;
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  display: grid;
  place-items: center;
  color: #ffe8df;
  font-family: "IM Fell English", Georgia, serif;
  font-size: 1.45rem;
  line-height: 1;
  border-radius: 48% 52% 53% 47% / 49% 47% 53% 51%;
  background:
    radial-gradient(circle at 28% 22%, rgba(255, 226, 216, 0.62), transparent 24%),
    radial-gradient(circle at 72% 76%, rgba(60, 0, 0, 0.42), transparent 34%),
    radial-gradient(circle at 50% 50%, var(--wax-light) 0%, var(--wax-mid) 42%, var(--wax) 64%, var(--wax-dark) 100%);
  box-shadow:
    inset 0 3px 10px rgba(255, 232, 223, 0.28),
    inset 0 -7px 14px rgba(50, 0, 0, 0.38),
    0 10px 22px var(--wax-shadow);
  text-shadow:
    0 1px 0 rgba(70, 0, 0, 0.45),
    0 -1px 0 rgba(255, 230, 220, 0.18);
  isolation: isolate;
}

.wax-seal::before {
  content: "";
  position: absolute;
  inset: 9%;
  border-radius: inherit;
  border: 1px solid rgba(255, 226, 216, 0.18);
  box-shadow:
    inset 0 0 12px rgba(255, 230, 220, 0.10),
    inset 0 0 0 1px rgba(60, 0, 0, 0.10);
  pointer-events: none;
}

.wax-seal::after {
  content: "";
  position: absolute;
  inset: -10%;
  border-radius: inherit;
  background:
    radial-gradient(circle at 50% 50%, transparent 56%, rgba(139, 47, 36, 0.16) 58%, transparent 62%),
    conic-gradient(from 210deg, transparent 0 12%, rgba(255, 230, 220, 0.08) 14%, transparent 18% 100%);
  filter: blur(0.2px);
  opacity: 0.85;
  pointer-events: none;
  z-index: -1;
}

.wax-seal.large {
  width: 132px;
  height: 132px;
  font-size: 2.8rem;
  border-radius: 47% 53% 50% 50% / 52% 48% 52% 48%;
  box-shadow:
    inset 0 5px 16px rgba(255, 232, 223, 0.30),
    inset 0 -12px 24px rgba(50, 0, 0, 0.42),
    0 18px 36px var(--wax-shadow);
}

.seal-button {
  display: grid;
  justify-items: center;
  gap: 0.9rem;
  width: 100%;
  padding: 2rem 1rem;
  border: 1px dashed var(--border);
  background: rgba(255, 255, 255, 0.18);
  cursor: pointer;
  transition:
    background 180ms ease,
    border-color 180ms ease,
    transform 180ms ease;
}

.seal-button:hover {
  background: rgba(255, 255, 255, 0.28);
  border-color: var(--wax);
  transform: translateY(-1px);
}

.seal-button:hover .wax-seal.large {
  transform: rotate(-2deg) scale(1.02);
}

.seal-button:disabled {
  cursor: wait;
  opacity: 1;
}

.seal-text {
  font-family: "IM Fell English", Georgia, serif;
  font-size: 1.1rem;
  color: var(--ink-soft);
}

.cracking .wax-seal.large {
  animation: crackSeal 520ms ease forwards;
}

.letter-sheet {
  position: relative;
  padding: 2rem;
  border: 1px solid var(--border);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.38), rgba(255, 255, 255, 0.08)),
    var(--paper-soft);
  box-shadow: 0 18px 60px var(--shadow-strong);
  animation: appear 700ms ease both;
}

.letter-sheet::before {
  content: "";
  position: absolute;
  inset: 0.65rem;
  border: 1px solid rgba(184, 164, 128, 0.35);
  pointer-events: none;
}

.letter-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
}

.letter-body {
  margin: 1.5rem 0;
  white-space: pre-wrap;
}

.letter-footer {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(184, 164, 128, 0.5);
}

.attachment-frame {
  margin: 1.5rem 0;
  padding: 0.85rem;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.28);
}

.attachment-frame img {
  display: block;
  width: 100%;
  border: 1px solid rgba(43, 33, 24, 0.18);
}

.youtube-card {
  display: grid;
  gap: 0.5rem;
  margin: 1.25rem 0;
  padding: 1rem;
  border: 1px dashed var(--border);
  background: rgba(255, 255, 255, 0.22);
}

.youtube-card span {
  color: var(--wax-dark);
  font-weight: 600;
}

.preview img {
  border: 1px solid var(--border);
}

.archive-list {
  display: grid;
  gap: 0.9rem;
}

.archive-item {
  display: grid;
  gap: 0.45rem;
  padding: 1rem;
  border: 1px solid var(--border);
  background: rgba(255, 248, 234, 0.45);
  box-shadow: 0 8px 22px var(--shadow);
  animation: appear 450ms ease both;
}

.archive-item:hover {
  background: rgba(255, 252, 242, 0.68);
  text-decoration: none;
}

.archive-item-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
}

.archive-item-from,
.archive-item-snippet {
  color: var(--ink-soft);
}

.archive-item-marks {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.tiny-mark {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border: 1px solid rgba(184, 164, 128, 0.7);
  background: rgba(255, 255, 255, 0.25);
  font-size: 0.82rem;
  color: var(--ink-soft);
}

.footer-note {
  margin-top: 2rem;
  color: var(--ink-soft);
  font-style: italic;
  text-align: center;
}

@keyframes appear {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes crackSeal {
  0% {
    transform: scale(1) rotate(0deg);
    opacity: 1;
    filter: brightness(1);
  }
  28% {
    transform: scale(1.05) rotate(-3deg);
    filter: brightness(1.08);
  }
  56% {
    transform: scale(1.10) rotate(3deg);
    opacity: 0.82;
    filter: brightness(1.12);
  }
  100% {
    transform: scale(1.22) rotate(0deg);
    opacity: 0;
    filter: brightness(1.2);
  }
}

@media (max-width: 640px) {
  body {
    font-size: 17px;
  }

  h1 {
    font-size: 1.7rem;
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .page,
  .page.narrow,
  .center-card {
    width: calc(100% - 1.5rem);
  }

  .letter-sheet {
    padding: 1.25rem;
  }

  .wax-seal.large {
    width: 104px;
    height: 104px;
    font-size: 2.2rem;
  }
}