/* === Reset & Base === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg-light: #f0f7e6;
  --bg-medium: #e8f5d4;
  --bg-dark: #d4edbc;
  --text-primary: #2d5016;
  --text-secondary: #5a8a32;
  --text-muted: #7a9a5a;
  --white: #ffffff;
  --border: #c5dda8;
  --shadow: rgba(45, 80, 22, 0.1);
  --tag-good: #51cf66;
  --tag-low: #ffd43b;
  --tag-out: #ff6b6b;
  --btn-primary: #4a7c23;
  --btn-primary-hover: #3d6a1c;
  --btn-danger: #e03e3e;
  --btn-danger-hover: #c72c2c;
  --claimed-bg: #f5f5f5;
  --claimed-text: #999;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text-primary);
  background: var(--white);
  line-height: 1.6;
}

/* === Sticky Nav === */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--white);
  border-bottom: 2px solid var(--bg-dark);
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 8px var(--shadow);
}

nav .logo {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
  text-decoration: none;
}

nav .nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

nav .nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

nav .nav-links a:hover {
  color: var(--text-primary);
}

/* === Hero === */
.hero {
  background: linear-gradient(135deg, var(--bg-light), var(--bg-medium), var(--bg-dark));
  padding: 4rem 1.5rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.hero .subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

.hero .details {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}

.hero .detail-badge {
  background: var(--white);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
  box-shadow: 0 2px 6px var(--shadow);
}

.hero .cta-btn {
  display: inline-block;
  background: var(--btn-primary);
  color: var(--white);
  padding: 0.85rem 2rem;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s;
}

.hero .cta-btn:hover {
  background: var(--btn-primary-hover);
}

/* === Sections === */
section {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

section h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

section .section-desc {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
}

/* === Status Tags === */
.tag {
  display: inline-block;
  padding: 0.2rem 0.75rem;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tag-good {
  background: var(--tag-good);
  color: var(--white);
}

.tag-low {
  background: var(--tag-low);
  color: #333;
}

.tag-out {
  background: var(--tag-out);
  color: var(--white);
}

/* === Needed Items List === */
.needed-list {
  display: grid;
  gap: 0.75rem;
}

.needed-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-light);
  padding: 1rem 1.25rem;
  border-radius: 10px;
  border: 1px solid var(--border);
  transition: opacity 0.3s, background 0.3s;
}

.needed-item.claimed {
  background: var(--claimed-bg);
  opacity: 0.6;
}

.needed-item .item-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.needed-item .item-name {
  font-weight: 600;
}

.needed-item .claimed-by {
  font-style: italic;
  color: var(--claimed-text);
  font-size: 0.9rem;
}

.claim-btn {
  background: var(--btn-primary);
  color: var(--white);
  border: none;
  padding: 0.5rem 1.25rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.claim-btn:hover {
  background: var(--btn-primary-hover);
}

.claim-btn:disabled {
  background: #ccc;
  cursor: not-allowed;
}

/* === Sign-Up Form === */
.signup-form {
  display: grid;
  gap: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.3rem;
  color: var(--text-primary);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="tel"] {
  width: 100%;
  padding: 0.7rem 1rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
  transition: border-color 0.2s;
  background: var(--white);
}

.form-group input:focus {
  outline: none;
  border-color: var(--btn-primary);
}

.radio-group {
  display: grid;
  gap: 0.5rem;
}

.radio-group label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 400;
  cursor: pointer;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  transition: border-color 0.2s, background 0.2s;
}

.radio-group label:hover {
  border-color: var(--btn-primary);
  background: var(--bg-light);
}

.radio-group input[type="radio"] {
  accent-color: var(--btn-primary);
}

.submit-btn {
  background: var(--btn-primary);
  color: var(--white);
  border: none;
  padding: 0.85rem 2rem;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
  width: 100%;
}

.submit-btn:hover {
  background: var(--btn-primary-hover);
}

.form-success {
  background: var(--bg-medium);
  border: 2px solid var(--btn-primary);
  border-radius: 10px;
  padding: 1.5rem;
  text-align: center;
  font-weight: 600;
  color: var(--text-primary);
}

/* === Inventory Grid === */
.inventory-grid {
  display: grid;
  gap: 0.5rem;
}

.item-qty {
  font-weight: 400;
  color: var(--text-muted);
  font-size: 0.9em;
}

.inventory-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 0;
}

.inventory-item .item-name {
  font-weight: 500;
}

/* === Footer === */
footer {
  background: var(--bg-light);
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  border-top: 2px solid var(--border);
}

footer a {
  color: var(--btn-primary);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* === Empty State === */
.empty-state {
  text-align: center;
  padding: 2rem;
  color: var(--text-muted);
  font-style: italic;
}

/* === Admin Styles === */
.admin-login {
  max-width: 400px;
  margin: 4rem auto;
  padding: 2rem;
  background: var(--bg-light);
  border-radius: 12px;
  border: 2px solid var(--border);
}

.admin-login h1 {
  text-align: center;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.admin-dashboard {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

.admin-dashboard h1 {
  font-size: 1.8rem;
  color: var(--text-primary);
  margin-bottom: 2rem;
}

.panel {
  background: var(--bg-light);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.panel h2 {
  font-size: 1.3rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.admin-table th,
.admin-table td {
  text-align: left;
  padding: 0.6rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

.admin-table th {
  font-weight: 600;
  color: var(--text-secondary);
}

.inventory-row {
  display: grid;
  grid-template-columns: 1fr auto auto auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
}

.inventory-row input,
.inventory-row select {
  padding: 0.5rem 0.75rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.9rem;
}

.btn {
  padding: 0.5rem 1.25rem;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.btn-primary {
  background: var(--btn-primary);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--btn-primary-hover);
}

.btn-danger {
  background: var(--btn-danger);
  color: var(--white);
}

.btn-danger:hover {
  background: var(--btn-danger-hover);
}

.btn-outline {
  background: var(--white);
  color: var(--text-primary);
  border: 2px solid var(--border);
}

.btn-outline:hover {
  border-color: var(--btn-primary);
  color: var(--btn-primary);
}

.settings-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.settings-row select,
.settings-row input[type="time"] {
  padding: 0.5rem 0.75rem;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.9rem;
}

/* === Responsive === */
@media (max-width: 640px) {
  .hero h1 {
    font-size: 2rem;
  }

  nav .nav-links {
    gap: 0.75rem;
    font-size: 0.85rem;
  }

  .inventory-row {
    grid-template-columns: 1fr;
  }

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