:root {
  --font: "Nunito", system-ui, sans-serif;
  --bg: #eef4f2;
  --bg-deep: #dce8e3;
  --surface: rgba(255, 255, 255, 0.78);
  --surface-solid: #ffffff;
  --ink: #13251f;
  --muted: #4d675c;
  --border: rgba(19, 37, 31, 0.12);
  --accent: #0f766e;
  --accent-strong: #0b5f59;
  --accent-soft: rgba(15, 118, 110, 0.12);
  --danger: #b42318;
  --ok: #067647;
  --shadow: 0 24px 60px rgba(19, 37, 31, 0.1);
  --orb-a: rgba(15, 118, 110, 0.22);
  --orb-b: rgba(14, 116, 144, 0.16);
  --drop-border: rgba(15, 118, 110, 0.35);
  --radius: 22px;
  --transition: 220ms ease;
}

[data-theme="dark"] {
  --bg: #0c1412;
  --bg-deep: #08100e;
  --surface: rgba(22, 34, 31, 0.82);
  --surface-solid: #16221f;
  --ink: #e8f2ee;
  --muted: #9bb3a8;
  --border: rgba(232, 242, 238, 0.1);
  --accent: #2dd4bf;
  --accent-strong: #5eead4;
  --accent-soft: rgba(45, 212, 191, 0.14);
  --danger: #f97066;
  --ok: #47cd89;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  --orb-a: rgba(45, 212, 191, 0.14);
  --orb-b: rgba(56, 189, 248, 0.1);
  --drop-border: rgba(45, 212, 191, 0.35);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, var(--orb-a), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, var(--orb-b), transparent 50%),
    linear-gradient(165deg, var(--bg), var(--bg-deep));
  background-attachment: fixed;
  line-height: 1.5;
  overflow-x: hidden;
}

.bg-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
  animation: float 12s ease-in-out infinite;
}

.bg-orb--a {
  width: 280px;
  height: 280px;
  top: 12%;
  left: -80px;
  background: var(--orb-a);
}

.bg-orb--b {
  width: 340px;
  height: 340px;
  right: -100px;
  bottom: 8%;
  background: var(--orb-b);
  animation-delay: -4s;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-18px) scale(1.04);
  }
}

.topbar,
.hero,
.footer {
  position: relative;
  z-index: 1;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem clamp(1.25rem, 4vw, 3rem);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.brand-mark {
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--accent);
  box-shadow: 0 0 0 6px var(--accent-soft);
  animation: pulse 2.8s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.08);
  }
}

.brand-name {
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.theme-toggle {
  position: relative;
  width: 46px;
  height: 46px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  backdrop-filter: blur(10px);
  transition: transform var(--transition), background var(--transition);
}

.theme-toggle:hover {
  transform: translateY(-1px);
}

.theme-toggle__icon {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-size: 1.1rem;
  transition: opacity var(--transition), transform var(--transition);
}

[data-theme="light"] .theme-toggle__icon--moon,
[data-theme="dark"] .theme-toggle__icon--sun,
:root:not([data-theme]) .theme-toggle__icon--moon {
  opacity: 0;
  transform: scale(0.6);
}

[data-theme="dark"] .theme-toggle__icon--moon {
  opacity: 1;
  transform: scale(1);
}

.hero {
  width: min(720px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1rem 0 4rem;
  display: grid;
  gap: 1.75rem;
}

.hero-copy {
  text-align: center;
  animation: rise 0.7s ease both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.logo-display {
  margin: 0;
  font-size: clamp(2.6rem, 8vw, 4.4rem);
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1.05;
  background: linear-gradient(120deg, var(--ink) 30%, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.tagline {
  margin: 0.85rem auto 0;
  max-width: 28ch;
  color: var(--muted);
  font-size: 1.08rem;
  font-weight: 600;
}

.uploader {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
  padding: clamp(1.25rem, 3vw, 1.75rem);
  display: grid;
  gap: 1rem;
  animation: rise 0.8s ease 0.08s both;
}

.dropzone {
  border: 1.5px dashed var(--drop-border);
  border-radius: 18px;
  padding: 2rem 1.25rem;
  text-align: center;
  cursor: pointer;
  background: var(--accent-soft);
  transition:
    border-color var(--transition),
    background var(--transition),
    transform var(--transition);
}

.dropzone:hover,
.dropzone:focus-visible,
.dropzone.is-dragover {
  outline: none;
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent-soft) 80%, white 20%);
  transform: translateY(-2px);
}

[data-theme="dark"] .dropzone:hover,
[data-theme="dark"] .dropzone:focus-visible,
[data-theme="dark"] .dropzone.is-dragover {
  background: color-mix(in srgb, var(--accent-soft) 80%, black 20%);
}

.dropzone__visual {
  color: var(--accent);
  margin-bottom: 0.65rem;
  display: flex;
  justify-content: center;
}

.dropzone__title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 800;
}

.dropzone__hint {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-weight: 600;
}

.dropzone__meta {
  margin: 1rem auto 0;
  max-width: 42ch;
  font-size: 0.82rem;
  color: var(--muted);
  font-weight: 600;
  line-height: 1.45;
}

.file-chip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--surface-solid);
}

.file-chip__info {
  display: grid;
  gap: 0.15rem;
  min-width: 0;
}

.file-chip__info strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-chip__info span {
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 600;
}

.btn {
  font-family: inherit;
  font-weight: 800;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  padding: 0.9rem 1.15rem;
  transition:
    transform var(--transition),
    background var(--transition),
    opacity var(--transition);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.btn:not(:disabled):hover {
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
}

[data-theme="dark"] .btn--primary {
  color: #06221f;
}

.btn--primary:not(:disabled):hover {
  background: var(--accent-strong);
}

.btn--secondary {
  background: var(--accent-soft);
  color: var(--accent-strong);
  white-space: nowrap;
}

.btn--ghost {
  background: transparent;
  color: var(--muted);
  padding: 0.45rem 0.7rem;
}

.progress {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: center;
}

.progress__track {
  height: 10px;
  border-radius: 999px;
  background: var(--border);
  overflow: hidden;
}

.progress__bar {
  height: 100%;
  width: 0%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--accent-strong));
  transition: width 120ms linear;
}

.progress__label {
  font-weight: 800;
  font-size: 0.9rem;
  color: var(--muted);
  min-width: 3ch;
}

.notice {
  margin: 0;
  padding: 0.95rem 1rem;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
}

.notice strong {
  color: var(--ink);
}

.result {
  display: grid;
  gap: 0.7rem;
  padding-top: 0.25rem;
  animation: rise 0.45s ease both;
}

.result__label {
  margin: 0;
  font-weight: 800;
}

.result__row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
}

.result__row input {
  width: 100%;
  min-width: 0;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.92rem;
  color: var(--ink);
  background: var(--surface-solid);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.8rem 0.9rem;
}

.result__open {
  color: var(--accent-strong);
  font-weight: 800;
  text-decoration: none;
  width: fit-content;
}

.result__open:hover {
  text-decoration: underline;
}

.status {
  margin: 0;
  min-height: 1.4em;
  font-weight: 700;
  font-size: 0.95rem;
}

.status.is-error {
  color: var(--danger);
}

.status.is-ok {
  color: var(--ok);
}

.footer {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  padding: 0 1.5rem 2rem;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 560px) {
  .result__row {
    grid-template-columns: 1fr;
  }

  .file-chip {
    flex-direction: column;
    align-items: stretch;
  }
}