/* ============================================
   Community Marketplace App - Style Sheet
   Mobile-first • Clean • Professional
   ============================================ */

/* --- CSS Variables / Design Tokens --- */
:root {
  --color-primary: #1a7f5a;
  --color-primary-light: #e8f5f0;
  --color-primary-dark: #145f44;
  --color-accent: #25d366;
  --color-text: #1a1a2e;
  --color-text-muted: #6b7280;
  --color-bg: #f8fafb;
  --color-card: #ffffff;
  --color-border: #e5e7eb;
  --color-error: #dc2626;
  --color-error-light: #fef2f2;
  --color-success: #059669;
  --color-success-light: #ecfdf5;
  --color-warning: #d97706;
  --color-warning-light: #fffbeb;
  --radius-card: 12px;
  --radius-input: 8px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --nav-height: 56px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  display: block;
}

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

a:hover {
  text-decoration: underline;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  background: none;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* --- Typography --- */
h1 {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-text);
}

h2 {
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}

h3 {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
}

h4 {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
}

p {
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

small {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.text-muted {
  color: var(--color-text-muted);
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 0 16px;
}

.page {
  padding-top: calc(var(--nav-height) + 16px);
  padding-bottom: 24px;
  min-height: 100vh;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-input);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: center;
  white-space: nowrap;
  user-select: none;
  -webkit-user-select: none;
}

.btn:active {
  transform: scale(0.97);
}

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

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

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

.btn-secondary:hover {
  background-color: #d1ede4;
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

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

.btn-whatsapp {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn-whatsapp:hover {
  background-color: #1fb855;
}

.btn-danger {
  background-color: var(--color-error);
  color: #ffffff;
}

.btn-danger:hover {
  background-color: #b91c1c;
}

.btn-sm {
  padding: 8px 14px;
  font-size: 0.8125rem;
}

.btn-full {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* --- Cards --- */
.card {
  background-color: var(--color-card);
  border-radius: var(--radius-card);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

/* --- Forms --- */
.form-group {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-input,
.form-select {
  width: 100%;
  padding: 12px 14px;
  font-size: 0.9375rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-input);
  background-color: var(--color-card);
  color: var(--color-text);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

.form-input:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 127, 90, 0.1);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2'%3E%3Cpolyline points='6,9 12,15 18,9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.form-input.error {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

/* --- Auth --- */
.auth-card {
  background-color: var(--color-card);
  border-radius: var(--radius-card);
  padding: 24px 20px;
  box-shadow: var(--shadow-md);
  margin-top: 40px;
}

.auth-tabs {
  display: flex;
  background-color: var(--color-bg);
  border-radius: var(--radius-input);
  padding: 4px;
  margin-bottom: 24px;
}

.auth-tab {
  flex: 1;
  padding: 10px 16px;
  font-size: 0.875rem;
  font-weight: 600;
  text-align: center;
  border-radius: 6px;
  color: var(--color-text-muted);
  background: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.auth-tab.active {
  background-color: var(--color-card);
  color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.auth-form {
  display: none;
}

.auth-form.active {
  display: block;
}

.auth-message {
  padding: 12px 14px;
  border-radius: var(--radius-input);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 16px;
  text-align: center;
}

.auth-message.success {
  background-color: var(--color-success-light);
  color: var(--color-success);
  border: 1px solid #a7f3d0;
}

.auth-message.error {
  background-color: var(--color-error-light);
  color: var(--color-error);
  border: 1px solid #fecaca;
}

/* --- Navigation --- */
.nav-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.nav-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0;
  width: 100%;
}

.nav-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-actions .btn {
  padding: 8px 12px;
}

/* --- Seller Cards --- */
.seller-card {
  background-color: var(--color-card);
  border-radius: var(--radius-card);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  transition: box-shadow 0.2s ease;
}

.seller-card:active {
  box-shadow: var(--shadow-md);
}

.seller-card-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.seller-card-info {
  flex: 1;
  min-width: 0;
}

.seller-card-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.seller-card-description {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.seller-card-block {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  background-color: var(--color-bg);
  padding: 4px 8px;
  border-radius: 4px;
  display: inline-block;
}

/* --- Order Cards --- */
.order-card {
  background-color: var(--color-card);
  border-radius: var(--radius-card);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  margin-bottom: 12px;
}

.order-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.order-card-customer {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
}

.order-card-items {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
  padding: 10px 12px;
  background-color: var(--color-bg);
  border-radius: var(--radius-input);
}

.order-card-actions {
  display: flex;
  gap: 8px;
}

.order-card-actions .btn {
  flex: 1;
}

/* --- Status Badges --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 0.6875rem;
  font-weight: 600;
  border-radius: 20px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  white-space: nowrap;
}

.badge-placed {
  background-color: #eff6ff;
  color: #2563eb;
}

.badge-confirmed {
  background-color: #f0fdf4;
  color: #16a34a;
}

.badge-in_process {
  background-color: #fffbeb;
  color: #d97706;
}

.badge-ready {
  background-color: #ecfdf5;
  color: #059669;
}

.badge-out_for_delivery {
  background-color: #fef3c7;
  color: #92400e;
}

.badge-delivered {
  background-color: #d1fae5;
  color: #065f46;
}

.badge-completed {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* --- Progress Tracker --- */
.progress-tracker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  position: relative;
}

.progress-tracker::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 20px;
  right: 20px;
  height: 2px;
  background-color: var(--color-border);
  transform: translateY(-50%);
  z-index: 0;
}

.progress-step {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-bg);
  border: 2px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  position: relative;
  z-index: 1;
  transition: all 0.3s ease;
}

.progress-step.active {
  border-color: var(--color-primary);
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.progress-step.completed {
  border-color: var(--color-primary);
  background-color: var(--color-primary);
  color: #ffffff;
}

.progress-step.completed::after {
  content: '✓';
  font-size: 0.875rem;
}

/* --- Modal / Bottom Sheet --- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 200;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background-color: var(--color-card);
  border-radius: 16px 16px 0 0;
  width: 100%;
  max-width: 480px;
  max-height: 85vh;
  overflow-y: auto;
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.32, 0.72, 0, 1);
}

.modal-overlay.active .modal-content {
  transform: translateY(0);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px 12px;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background-color: var(--color-card);
  z-index: 1;
}

.modal-header::before {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 4px;
  background-color: var(--color-border);
  border-radius: 2px;
}

.modal-header h3 {
  font-size: 1.125rem;
  font-weight: 700;
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-text-muted);
  cursor: pointer;
  border: none;
}

.modal-body {
  padding: 20px;
}

/* --- Toast Notifications --- */
.toast {
  position: fixed;
  top: calc(var(--nav-height) + 12px);
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  padding: 12px 20px;
  border-radius: var(--radius-input);
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 300;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  max-width: calc(100% - 32px);
  text-align: center;
}

.toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.toast-success {
  background-color: var(--color-success);
  color: #ffffff;
}

.toast-error {
  background-color: var(--color-error);
  color: #ffffff;
}

/* --- Tabs --- */
.tabs {
  display: flex;
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-border);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.tabs::-webkit-scrollbar {
  display: none;
}

.tab {
  flex: 1;
  padding: 12px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  text-align: center;
  color: var(--color-text-muted);
  border: none;
  background: none;
  cursor: pointer;
  position: relative;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.tab.active {
  color: var(--color-primary);
  font-weight: 600;
}

.tab.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 16px;
  right: 16px;
  height: 2.5px;
  background-color: var(--color-primary);
  border-radius: 2px 2px 0 0;
}

/* --- Item Lists --- */
.item-list {
  border-radius: var(--radius-input);
  overflow: hidden;
}

.item-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}

.item-row:last-child {
  border-bottom: none;
}

.item-row-name {
  flex: 1;
  font-size: 0.9375rem;
  color: var(--color-text);
}

.item-row-qty {
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin: 0 12px;
  white-space: nowrap;
}

.item-row-price {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}

/* --- Utility Classes --- */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.mt-sm { margin-top: 8px; }
.mt-md { margin-top: 16px; }
.mt-lg { margin-top: 24px; }

.mb-sm { margin-bottom: 8px; }
.mb-md { margin-bottom: 16px; }
.mb-lg { margin-bottom: 24px; }

.flex {
  display: flex;
  align-items: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.gap-sm {
  gap: 8px;
}

/* --- Empty State --- */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  text-align: center;
}

.empty-state-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: 0.6;
}

.empty-state-message {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  max-width: 260px;
  line-height: 1.5;
}

/* --- Loading Spinner --- */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 24px auto;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* --- Responsive --- */
@media (min-width: 481px) {
  .container {
    padding: 0 24px;
  }

  .page {
    padding-top: calc(var(--nav-height) + 24px);
    padding-bottom: 32px;
  }

  .modal-content {
    border-radius: 16px;
    margin-bottom: 24px;
  }

  .modal-overlay {
    align-items: center;
  }
}