:root {
  --ink: #101820;
  --ink-soft: #3a4654;
  --paper: #f3efe6;
  --paper-deep: #e4ddd0;
  --line: rgba(16, 24, 32, 0.12);
  --accent: #c8102e;
  --accent-deep: #8f0b20;
  --field: rgba(255, 255, 255, 0.78);
  --shadow: 0 24px 60px rgba(16, 24, 32, 0.12);
  --radius: 18px;
  --font-display: "Bebas Neue", Impact, sans-serif;
  --font-body: "DM Sans", "Helvetica Neue", sans-serif;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

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

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

body {
  color: var(--ink);
  font-family: var(--font-body);
  background: var(--paper);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.is-loading {
  overflow: hidden;
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(1200px 700px at 10% -10%, rgba(200, 16, 46, 0.18), transparent 55%),
    radial-gradient(900px 500px at 90% 0%, rgba(16, 24, 32, 0.1), transparent 50%),
    linear-gradient(180deg, #f7f3eb 0%, #ebe4d6 45%, #e2dac9 100%);
}

.atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(16, 24, 32, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 24, 32, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 80%);
}

.shell {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
  padding: calc(2rem + var(--safe-top)) 0 calc(3.5rem + var(--safe-bottom));
}

.brand {
  margin-bottom: 2rem;
  animation: rise 0.7s ease both;
}

.brand__mark {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(4.2rem, 16vw, 7.5rem);
  letter-spacing: 0.04em;
  line-height: 0.9;
  color: var(--ink);
}

.brand__sub {
  margin: 0.55rem 0 0;
  color: var(--ink-soft);
  font-size: 1rem;
  font-weight: 500;
}

.lookup {
  max-width: 560px;
  animation: rise 0.8s ease 0.08s both;
}

.lookup__title {
  margin: 0;
  font-size: clamp(1.45rem, 5vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.lookup__lead {
  margin: 0.65rem 0 1.35rem;
  color: var(--ink-soft);
  line-height: 1.5;
  font-size: 0.98rem;
}

.lookup__form {
  display: grid;
  gap: 0.85rem;
}

.grader {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
}

.grader__option {
  position: relative;
  cursor: pointer;
}

.grader__option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.grader__option span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.45);
  font-weight: 700;
  letter-spacing: 0.04em;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.grader__option input:checked + span {
  border-color: rgba(200, 16, 46, 0.55);
  background: rgba(200, 16, 46, 0.1);
  color: var(--accent-deep);
}

.grader__option input:focus-visible + span {
  box-shadow: 0 0 0 4px rgba(200, 16, 46, 0.12);
}

.subgrades {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(72px, 1fr));
  gap: 0.45rem;
  margin: 0.75rem 0 0.35rem;
}

.subgrades__item {
  display: grid;
  gap: 0.15rem;
  padding: 0.55rem 0.45rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.45);
  text-align: center;
}

.subgrades__label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.subgrades__value {
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: 0.03em;
  color: var(--ink);
  line-height: 1;
}

.field {
  display: grid;
  gap: 0.4rem;
}

.field__label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.field__input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--field);
  backdrop-filter: blur(8px);
  padding: 1rem 1.05rem;
  font: inherit;
  font-size: 1.125rem;
  letter-spacing: 0.04em;
  color: var(--ink);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field__input:focus {
  border-color: rgba(200, 16, 46, 0.55);
  box-shadow: 0 0 0 4px rgba(200, 16, 46, 0.12);
}

.cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.35rem;
  border: 0;
  border-radius: 14px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-deep) 100%);
  color: #fff;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  box-shadow: 0 12px 28px rgba(200, 16, 46, 0.28);
  transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
  -webkit-tap-highlight-color: transparent;
}

.cta:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 16px 34px rgba(200, 16, 46, 0.34);
}

.cta:active:not(:disabled) {
  transform: translateY(0);
}

.cta:disabled {
  cursor: wait;
  opacity: 0.9;
}

.status {
  min-height: 1.35rem;
  margin: 0.9rem 0 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

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

/* Loading overlay */
.loader {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 1.25rem;
  padding-top: calc(1.25rem + var(--safe-top));
  padding-bottom: calc(1.25rem + var(--safe-bottom));
  background:
    radial-gradient(700px 420px at 50% 30%, rgba(200, 16, 46, 0.2), transparent 60%),
    rgba(16, 24, 32, 0.72);
  backdrop-filter: blur(10px);
  animation: fade 0.25s ease both;
}

.loader[hidden] {
  display: none;
}

.loader__panel {
  width: min(360px, 100%);
  text-align: center;
  color: #f7f3eb;
}

.loader__brand {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: 3.4rem;
  letter-spacing: 0.06em;
  line-height: 0.9;
  animation: pulse 1.6s ease-in-out infinite;
}

.loader__slab {
  position: relative;
  width: 92px;
  height: 128px;
  margin: 0 auto 1.35rem;
  border-radius: 10px;
  background: linear-gradient(160deg, #f2efe8 0%, #d9d2c4 45%, #bdb4a4 100%);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.35);
  overflow: hidden;
  animation: float 1.8s ease-in-out infinite;
}

.loader__slab::before {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(16, 24, 32, 0.18);
  border-radius: 6px;
}

.loader__slab-shine {
  position: absolute;
  inset: -40% -60%;
  background: linear-gradient(
    105deg,
    transparent 35%,
    rgba(255, 255, 255, 0.55) 50%,
    transparent 65%
  );
  animation: shine 1.7s ease-in-out infinite;
}

.loader__title {
  margin: 0;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.loader__step {
  margin: 0.45rem 0 1.15rem;
  color: rgba(247, 243, 235, 0.72);
  font-size: 0.95rem;
  min-height: 1.3rem;
}

.loader__bar {
  height: 4px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  overflow: hidden;
}

.loader__bar-fill {
  display: block;
  height: 100%;
  width: 35%;
  border-radius: inherit;
  background: linear-gradient(90deg, #fff 0%, #ffb3bf 100%);
  animation: bar 1.4s ease-in-out infinite;
}

.result {
  display: grid;
  grid-template-columns: minmax(180px, 280px) 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.58);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow);
  animation: rise 0.55s ease both;
}

.result__media {
  position: relative;
  min-height: 280px;
  border-radius: 14px;
  overflow: hidden;
  background: linear-gradient(145deg, #1a2330, #0d1218);
  display: grid;
  place-items: center;
}

.result__media img {
  width: 100%;
  height: 100%;
  max-height: 420px;
  object-fit: contain;
  display: block;
  animation: fade 0.5s ease both;
}

.result__fallback {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.95rem;
  padding: 1rem;
  text-align: center;
}

.result__grade {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 8vw, 2.7rem);
  letter-spacing: 0.04em;
  color: var(--accent);
  line-height: 1;
}

.result__estimate {
  margin: 0.35rem 0 0;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
}

.result__subject {
  margin: 0.45rem 0 0.45rem;
  font-size: clamp(1.45rem, 5.5vw, 2.15rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.result__meta {
  margin: 0 0 1.1rem;
  color: var(--ink-soft);
  font-weight: 500;
  font-size: 0.95rem;
}

.facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem 1rem;
  margin: 0;
}

.facts div {
  display: grid;
  gap: 0.2rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line);
}

.facts dt {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.facts dd {
  margin: 0;
  font-size: 0.98rem;
  font-weight: 600;
  word-break: break-word;
}

.result__link {
  display: inline-flex;
  margin-top: 1.15rem;
  color: var(--accent-deep);
  font-weight: 700;
  text-decoration: none;
}

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

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) rotate(-2deg);
  }
  50% {
    transform: translateY(-8px) rotate(2deg);
  }
}

@keyframes shine {
  0% {
    transform: translateX(-30%) rotate(12deg);
  }
  100% {
    transform: translateX(70%) rotate(12deg);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.72;
  }
}

@keyframes bar {
  0% {
    transform: translateX(-120%);
  }
  100% {
    transform: translateX(320%);
  }
}

@media (max-width: 760px) {
  .shell {
    width: min(100% - 1.25rem, 1080px);
    padding-top: calc(1.25rem + var(--safe-top));
  }

  .brand {
    margin-bottom: 1.4rem;
  }

  .lookup__lead {
    margin-bottom: 1.1rem;
  }

  .cta {
    min-height: 3.5rem;
    font-size: 1.05rem;
    position: sticky;
    bottom: calc(0.75rem + var(--safe-bottom));
  }

  .result {
    grid-template-columns: 1fr;
    margin-top: 1.5rem;
    padding: 1rem;
    gap: 1.1rem;
  }

  .result__media {
    min-height: 300px;
  }

  .facts {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 420px) {
  .facts {
    grid-template-columns: 1fr;
  }
}