.homework-submission-page {
  --homework-ink: #0b2148;
  --homework-muted: #49617f;
  --homework-blue: #0a49b8;
  --homework-blue-dark: #073786;
  --homework-line: #c7d5e8;
  --homework-surface: #f5f8fc;
  background: #eef4fb;
}

.homework-submission-page .site-main {
  background:
    linear-gradient(rgba(10, 73, 184, 0.04) 1px, transparent 1px),
    #eef4fb;
  background-size: 100% 44px;
}

.homework-submission-page .floating-contact {
  display: none;
}

.homework-submit-shell {
  width: min(76rem, calc(100% - 2rem));
  margin: 0 auto;
  padding: clamp(2.4rem, 6vw, 5rem) 0 clamp(4rem, 7vw, 6rem);
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(500px, 1.22fr);
  gap: clamp(2rem, 5vw, 5.5rem);
  align-items: start;
  color: var(--homework-ink);
}

.homework-submit-intro {
  position: sticky;
  top: 7rem;
}

.homework-back-link {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  margin-bottom: 1.25rem;
  color: #21466f;
  font-weight: 800;
  text-decoration: none;
}

.homework-back-link::before {
  content: "←";
  margin-right: 0.5rem;
  font-size: 1.15rem;
}

.homework-back-link:hover {
  color: var(--homework-blue);
}

.homework-back-link:focus-visible,
.homework-form-card :focus-visible {
  outline: 3px solid rgba(10, 73, 184, 0.34);
  outline-offset: 3px;
}

.homework-kicker {
  margin: 0 0 0.8rem;
  color: var(--homework-blue);
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.homework-submit-intro h1 {
  max-width: 11ch;
  margin: 0;
  color: var(--homework-ink);
  font-family: "Manrope", sans-serif;
  font-size: clamp(2.65rem, 5vw, 4.7rem);
  font-weight: 800;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.homework-lead {
  max-width: 36rem;
  margin: 1.3rem 0 0;
  color: var(--homework-muted);
  font-size: 1.02rem;
  line-height: 1.7;
}

.homework-session-card {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: end;
  margin-top: 1.8rem;
  border: 1px solid #aebfda;
  border-radius: 16px;
  padding: 1rem 1.1rem;
  background: rgba(255, 255, 255, 0.74);
  box-shadow: 0 14px 34px rgba(16, 54, 105, 0.08);
}

.homework-session-card div {
  display: grid;
  gap: 0.15rem;
}

.homework-session-card span,
.homework-session-card p {
  color: #516987;
  font-size: 0.8rem;
  font-weight: 700;
}

.homework-session-card strong {
  color: var(--homework-blue-dark);
  font-size: 1.3rem;
}

.homework-session-card p {
  margin: 0;
  text-align: right;
}

.homework-steps {
  display: grid;
  gap: 0;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.homework-steps li {
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  gap: 0.8rem;
  position: relative;
  padding-bottom: 1rem;
}

.homework-steps li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 2.1rem;
  bottom: 0;
  left: 1.05rem;
  width: 1px;
  background: #aebfda;
}

.homework-steps li > span {
  display: grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: #dce8f8;
  color: var(--homework-blue-dark);
  font-weight: 900;
}

.homework-steps strong {
  color: var(--homework-ink);
  font-size: 0.92rem;
}

.homework-steps p {
  margin: 0.2rem 0 0;
  color: #5a6f8a;
  font-size: 0.86rem;
  line-height: 1.5;
}

.homework-form-card {
  border: 1px solid #bdcce0;
  border-radius: 18px;
  padding: clamp(1.1rem, 3vw, 2rem);
  background: #fff;
  box-shadow: 0 28px 68px rgba(16, 54, 105, 0.14);
}

.homework-alert {
  display: grid;
  gap: 0.2rem;
  margin-bottom: 1.2rem;
  border: 1px solid;
  border-radius: 14px;
  padding: 0.9rem 1rem;
}

.homework-alert strong {
  font-size: 0.95rem;
}

.homework-alert span {
  font-size: 0.88rem;
  line-height: 1.5;
}

.homework-alert.success {
  border-color: #75b48e;
  background: #edf9f1;
  color: #14572d;
}

.homework-alert.error {
  border-color: #e19b9b;
  background: #fff2f2;
  color: #8f2020;
}

.homework-form-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.homework-field {
  display: grid;
  gap: 0.5rem;
}

.homework-field.full {
  grid-column: 1 / -1;
}

.homework-field label,
.homework-field-label {
  color: var(--homework-ink);
  font-size: 0.9rem;
  font-weight: 900;
}

.homework-field label span {
  color: #657993;
  font-weight: 650;
}

.homework-field input[type="text"],
.homework-field select,
.homework-field textarea {
  width: 100%;
  border: 1px solid #9fb1c9;
  border-radius: 12px;
  background: #fff;
  color: #102a4e;
  font: inherit;
  font-size: 0.96rem;
  line-height: 1.5;
}

.homework-field input[type="text"],
.homework-field select {
  min-height: 50px;
  padding: 0 0.85rem;
}

.homework-field textarea {
  min-height: 112px;
  resize: vertical;
  padding: 0.8rem 0.85rem;
}

.homework-field input::placeholder,
.homework-field textarea::placeholder {
  color: #6d7f95;
  opacity: 1;
}

.homework-field input:hover,
.homework-field select:hover,
.homework-field textarea:hover {
  border-color: #7089a9;
}

.homework-field input:focus,
.homework-field select:focus,
.homework-field textarea:focus {
  border-color: var(--homework-blue);
  outline: 3px solid rgba(10, 73, 184, 0.14);
}

.homework-field small,
.homework-file-rules {
  margin: 0;
  color: #5b708a;
  font-size: 0.79rem;
  line-height: 1.5;
}

.homework-files-field {
  margin-top: 1.05rem;
}

.homework-drop-zone {
  display: flex;
  min-height: 250px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  border: 2px dashed #8fa7c7;
  border-radius: 16px;
  padding: 1.4rem;
  background:
    linear-gradient(135deg, rgba(10, 73, 184, 0.035) 25%, transparent 25%) 0 0 / 22px 22px,
    #f7faff;
  color: #4a6381;
  cursor: pointer;
  text-align: center;
  transition: border-color 160ms ease, background-color 160ms ease, transform 160ms ease;
}

.homework-drop-zone:hover,
.homework-drop-zone.is-dragging,
.homework-drop-zone.is-pasted {
  border-color: var(--homework-blue);
  background-color: #edf4ff;
}

.homework-drop-zone.is-dragging {
  transform: scale(0.992);
}

.homework-drop-zone input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.homework-file-mark {
  position: relative;
  display: block;
  width: 56px;
  height: 48px;
  margin-bottom: 0.9rem;
}

.homework-file-mark i {
  position: absolute;
  display: block;
  width: 35px;
  height: 43px;
  border: 2px solid var(--homework-blue);
  border-radius: 7px;
  background: #fff;
  box-shadow: 0 8px 18px rgba(10, 73, 184, 0.13);
}

.homework-file-mark i:nth-child(1) {
  left: 0;
  top: 5px;
  transform: rotate(-9deg);
}

.homework-file-mark i:nth-child(2) {
  right: 0;
  top: 5px;
  transform: rotate(9deg);
}

.homework-file-mark i:nth-child(3) {
  left: 11px;
  top: 0;
}

.homework-drop-zone strong {
  color: var(--homework-ink);
  font-size: 1.08rem;
}

.homework-drop-zone > span:not(.homework-file-mark) {
  margin: 0.3rem 0 0.75rem;
  color: #59708c;
  font-size: 0.88rem;
}

.homework-drop-zone kbd {
  display: inline-grid;
  min-width: 31px;
  height: 27px;
  place-items: center;
  margin: 0 0.18rem;
  border: 1px solid #9fb1c9;
  border-bottom-width: 3px;
  border-radius: 6px;
  background: #fff;
  color: #203e64;
  font-family: inherit;
  font-size: 0.74rem;
  font-weight: 900;
}

.homework-inline-error {
  border-radius: 10px;
  padding: 0.7rem 0.8rem;
  background: #fff0f0;
  color: #922424;
  font-size: 0.84rem;
  font-weight: 750;
}

.homework-file-list {
  display: grid;
  gap: 0.65rem;
}

.homework-file-list:empty {
  display: none;
}

.homework-file-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: center;
  border: 1px solid #d0dbea;
  border-radius: 12px;
  padding: 0.6rem;
  background: #f9fbfe;
}

.homework-file-preview {
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  overflow: hidden;
  border-radius: 9px;
  background: #dfeaf8;
  color: #174b92;
  font-size: 0.68rem;
  font-weight: 900;
}

.homework-file-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.homework-file-copy strong {
  overflow: hidden;
  color: #17375f;
  font-size: 0.86rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.homework-file-copy span {
  color: #61768f;
  font-size: 0.76rem;
}

.homework-file-remove {
  min-height: 38px;
  border: 1px solid #c4d1e1;
  border-radius: 10px;
  padding: 0.35rem 0.7rem;
  background: #fff;
  color: #6f2a2a;
  font: inherit;
  font-size: 0.78rem;
  font-weight: 850;
  cursor: pointer;
}

.homework-file-remove:hover {
  border-color: #d39494;
  background: #fff3f3;
}

.homework-file-remove:active,
#homework-submit-button:active {
  transform: translateY(1px) scale(0.99);
}

.homework-submit-row {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.25rem;
  border-top: 1px solid #d6dfeb;
  padding-top: 1.2rem;
}

.homework-submit-row p {
  margin: 0;
  color: #4f6682;
  font-size: 0.86rem;
  font-weight: 750;
}

#homework-submit-button {
  min-width: 150px;
  min-height: 50px;
  border: 0;
  border-radius: 12px;
  padding: 0.75rem 1rem;
  background: var(--homework-blue);
  color: #fff;
  box-shadow: 0 13px 28px rgba(10, 73, 184, 0.22);
  font: inherit;
  font-weight: 900;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color 160ms ease, transform 160ms ease;
}

#homework-submit-button:hover {
  background: var(--homework-blue-dark);
}

#homework-submit-button:disabled {
  background: #6a7e99;
  box-shadow: none;
  cursor: wait;
}

@media (max-width: 900px) {
  .homework-submit-shell {
    grid-template-columns: 1fr;
    width: min(46rem, calc(100% - 2rem));
  }

  .homework-submit-intro {
    position: static;
  }

  .homework-submit-intro h1 {
    max-width: 14ch;
  }

  .homework-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 0.8rem;
  }

  .homework-steps li {
    grid-template-columns: 1fr;
  }

  .homework-steps li:not(:last-child)::after {
    display: none;
  }
}

@media (max-width: 640px) {
  .homework-submit-shell {
    width: min(100% - 1rem, 46rem);
    padding-top: 1.2rem;
  }

  .homework-submit-intro h1 {
    font-size: clamp(2.45rem, 13vw, 3.45rem);
  }

  .homework-session-card {
    align-items: start;
    flex-direction: column;
  }

  .homework-session-card p {
    text-align: left;
  }

  .homework-steps {
    display: none;
  }

  .homework-drop-zone {
    min-height: 220px;
  }

  .homework-submit-row {
    align-items: stretch;
    flex-direction: column;
  }

  #homework-submit-button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .homework-drop-zone,
  #homework-submit-button {
    transition: none;
  }
}