:root {
  --ink: #1f1d1a;
  --paper: #f8f1e5;
  --paper-2: #f2e6d2;
  --accent: #f05a28;
  --accent-dark: #c03d12;
  --teal: #0f4c5c;
  --shadow: rgba(31, 29, 26, 0.18);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(1200px 600px at 10% 10%, rgba(240, 90, 40, 0.08), transparent 60%),
    radial-gradient(1000px 500px at 90% 20%, rgba(15, 76, 92, 0.12), transparent 60%),
    var(--paper);
  color: var(--ink);
  font-family: var(--font-body), serif;
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: repeating-linear-gradient(
      0deg,
      rgba(31, 29, 26, 0.03),
      rgba(31, 29, 26, 0.03) 1px,
      transparent 1px,
      transparent 24px
    ),
    repeating-linear-gradient(
      90deg,
      rgba(31, 29, 26, 0.02),
      rgba(31, 29, 26, 0.02) 1px,
      transparent 1px,
      transparent 24px
    );
  mix-blend-mode: multiply;
  pointer-events: none;
  opacity: 0.4;
}

main {
  position: relative;
  padding: 64px 8vw 80px;
}

h1, h2, h3 {
  font-family: var(--font-display), serif;
  margin: 0;
  letter-spacing: -0.01em;
}

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

button {
  font-family: var(--font-mono), monospace;
}

.page {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 24px;
  align-items: center;
  padding: 36px 40px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.85), rgba(246, 232, 210, 0.75));
  border-radius: var(--radius);
  box-shadow: 0 30px 80px var(--shadow);
  border: 1px solid rgba(31, 29, 26, 0.08);
}

.hero-title {
  font-size: clamp(2.4rem, 4vw, 3.4rem);
}

.hero p {
  margin: 12px 0 0;
  font-size: 1.05rem;
  color: rgba(31, 29, 26, 0.78);
}

.hero .stamp {
  justify-self: end;
  border: 2px dashed var(--accent);
  padding: 16px 20px;
  border-radius: 18px;
  transform: rotate(-2deg);
  background: rgba(240, 90, 40, 0.08);
  font-family: var(--font-mono), monospace;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.75rem;
}

.grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
}

.card {
  background: rgba(255, 255, 255, 0.85);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid rgba(31, 29, 26, 0.08);
  box-shadow: 0 20px 50px rgba(31, 29, 26, 0.12);
  backdrop-filter: blur(8px);
}

.card header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.section-title {
  font-size: 1.4rem;
}

.tag {
  font-family: var(--font-mono), monospace;
  font-size: 0.72rem;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid rgba(31, 29, 26, 0.1);
  background: rgba(15, 76, 92, 0.08);
  color: var(--teal);
}

.username-card {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.input {
  flex: 1 1 220px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid rgba(31, 29, 26, 0.2);
  background: #fffefb;
  font-size: 0.98rem;
  font-family: var(--font-body), serif;
}

textarea.input {
  resize: vertical;
}

.button {
  padding: 12px 18px;
  border-radius: 14px;
  border: none;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.button.secondary {
  background: rgba(15, 76, 92, 0.12);
  color: var(--teal);
  border: 1px solid rgba(15, 76, 92, 0.3);
}

.button.ghost {
  background: transparent;
  border: 1px dashed rgba(31, 29, 26, 0.3);
  color: var(--ink);
}

.button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  box-shadow: none;
}

.button:not(:disabled):hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(240, 90, 40, 0.25);
}

.upload-area {
  border: 2px dashed rgba(31, 29, 26, 0.25);
  border-radius: 18px;
  padding: 18px;
  display: grid;
  gap: 12px;
  background: rgba(255, 255, 255, 0.7);
}

.preview {
  width: 100%;
  border-radius: 16px;
  border: 1px solid rgba(31, 29, 26, 0.1);
  object-fit: cover;
  max-height: 260px;
}

.thumbnail-grid {
  display: grid;
  gap: 12px;
}

.thumb-card {
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(31, 29, 26, 0.08);
  border-radius: 16px;
  padding: 12px;
  display: grid;
  gap: 10px;
}

.thumb-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.thumb-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.muted {
  color: rgba(31, 29, 26, 0.65);
  font-size: 0.92rem;
}

.assignments {
  display: grid;
  gap: 14px;
  max-height: 520px;
  overflow: auto;
  padding-right: 6px;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.image-card {
  display: grid;
  gap: 8px;
}

.crop-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 1000;
}

.crop-modal {
  width: min(90vw, 720px);
  background: #fff;
  border-radius: 18px;
  padding: 16px;
  display: grid;
  gap: 12px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.2);
}

.crop-area {
  position: relative;
  width: 100%;
  height: 360px;
  border-radius: 12px;
  overflow: hidden;
  background: #111;
}

.crop-controls {
  display: grid;
  gap: 10px;
}

.crop-buttons {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.assignment-item {
  border: 1px solid rgba(31, 29, 26, 0.08);
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.7);
  cursor: pointer;
  transition: border 0.2s ease, transform 0.2s ease;
}

.assignment-item.active {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 12px 22px rgba(240, 90, 40, 0.18);
}

.assignment-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono), monospace;
  font-size: 0.75rem;
  color: rgba(31, 29, 26, 0.6);
}

.markdown {
  background: #fffefb;
  border-radius: 18px;
  padding: 20px;
  border: 1px solid rgba(31, 29, 26, 0.08);
}

.markdown h1, .markdown h2, .markdown h3 {
  margin-top: 1em;
}

.markdown code {
  font-family: var(--font-mono), monospace;
  background: rgba(31, 29, 26, 0.08);
  padding: 2px 6px;
  border-radius: 6px;
}

.feedback {
  border-left: 4px solid var(--accent);
  padding: 12px 16px;
  background: rgba(240, 90, 40, 0.08);
  border-radius: 12px;
}

.camera {
  display: grid;
  gap: 12px;
}

.camera video {
  width: 100%;
  border-radius: 16px;
  border: 1px solid rgba(31, 29, 26, 0.1);
}

@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .hero .stamp {
    justify-self: start;
  }
  .grid {
    grid-template-columns: 1fr;
  }
}