/* ==========================================================================
   Design Tokens & Base Styles
   ========================================================================== */

:root {
  /* Typography */
  --font-heading: 'Plus Jakarta Sans', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;

  /* Primary (Forest Green) */
  --color-primary-50: hsl(152, 40%, 96%);
  --color-primary-100: hsl(152, 38%, 90%);
  --color-primary-200: hsl(152, 36%, 78%);
  --color-primary-300: hsl(152, 34%, 64%);
  --color-primary-400: hsl(152, 32%, 50%);
  --color-primary-500: hsl(152, 40%, 38%);
  --color-primary-600: hsl(152, 44%, 30%);
  --color-primary-700: hsl(152, 48%, 24%);
  --color-primary-800: hsl(152, 50%, 18%);
  --color-primary-900: hsl(152, 52%, 12%);

  /* Neutral (Warm Gray) */
  --color-neutral-50: hsl(40, 10%, 97%);
  --color-neutral-100: hsl(40, 8%, 93%);
  --color-neutral-200: hsl(40, 6%, 85%);
  --color-neutral-300: hsl(40, 5%, 72%);
  --color-neutral-400: hsl(40, 4%, 56%);
  --color-neutral-500: hsl(40, 3%, 44%);
  --color-neutral-600: hsl(40, 4%, 34%);
  --color-neutral-700: hsl(40, 5%, 26%);
  --color-neutral-800: hsl(40, 6%, 18%);
  --color-neutral-900: hsl(40, 8%, 10%);

  /* Accent (Amber) */
  --color-accent-400: hsl(38, 90%, 55%);
  --color-accent-500: hsl(38, 85%, 48%);
  --color-accent-600: hsl(38, 80%, 40%);

  /* Semantic */
  --color-success: hsl(142, 60%, 40%);
  --color-warning: hsl(38, 90%, 50%);
  --color-error: hsl(0, 72%, 50%);
  --color-info: hsl(210, 60%, 50%);

  /* Spacing (8px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows (subtle, not heavy) */
  --shadow-sm: 0 1px 2px hsla(40, 8%, 10%, 0.06);
  --shadow-md: 0 2px 8px hsla(40, 8%, 10%, 0.08), 0 1px 2px hsla(40, 8%, 10%, 0.04);
  --shadow-lg: 0 4px 16px hsla(40, 8%, 10%, 0.1), 0 2px 4px hsla(40, 8%, 10%, 0.06);

  /* Layout */
  --nav-height: 56px;
  --content-max: 1120px;

  /* Transitions */
  --transition-fast: 120ms ease;
  --transition-normal: 180ms ease;
}

@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0ms;
    --transition-normal: 0ms;
  }
  *, *::before, *::after {
    animation-duration: 0ms !important;
    transition-duration: 0ms !important;
  }
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  color: var(--color-neutral-800);
  background: var(--color-neutral-50);
  line-height: 1.6;
  min-height: 100dvh;
}

#app {
  display: flex;
  flex-direction: column;
  min-height: 100dvh;
}

#main-content {
  flex: 1;
  padding-top: var(--nav-height);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  line-height: 1.25;
  color: var(--color-neutral-900);
}

h1 { font-size: 1.75rem; font-weight: 800; }
h2 { font-size: 1.375rem; font-weight: 700; }
h3 { font-size: 1.125rem; font-weight: 700; }
h4 { font-size: 1rem; font-weight: 600; }

a {
  color: var(--color-primary-600);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-700);
}

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

.ui-icon {
  display: inline-block;
  vertical-align: -0.15em;
  flex-shrink: 0;
  stroke: currentColor;
}

/* ==========================================================================
   Focus States (accessibility)
   ========================================================================== */

:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1;
  padding: var(--space-3) var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
  min-height: 44px;
  min-width: 44px;
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary-600);
  color: white;
  border-color: var(--color-primary-600);
}

.btn--primary:hover {
  background: var(--color-primary-700);
  border-color: var(--color-primary-700);
}

.btn--secondary {
  background: white;
  color: var(--color-neutral-700);
  border-color: var(--color-neutral-200);
}

.btn--secondary:hover {
  background: var(--color-neutral-50);
  border-color: var(--color-neutral-300);
}

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

.btn--danger:hover {
  background: hsl(0, 72%, 44%);
  border-color: hsl(0, 72%, 44%);
}

.btn--ghost {
  background: transparent;
  color: var(--color-neutral-600);
  border-color: transparent;
  padding: var(--space-2);
}

.btn--ghost:hover {
  background: var(--color-neutral-100);
  color: var(--color-neutral-800);
}

.btn--sm {
  font-size: 0.8125rem;
  padding: var(--space-2) var(--space-3);
  min-height: 36px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ==========================================================================
   Forms
   ========================================================================== */

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-neutral-700);
}

.form-input {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
  background: white;
  color: var(--color-neutral-800);
  transition: border-color var(--transition-fast);
  min-height: 44px;
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary-400);
  box-shadow: 0 0 0 3px hsla(152, 40%, 38%, 0.12);
}

.form-input::placeholder {
  color: var(--color-neutral-400);
}

.form-input--error {
  border-color: var(--color-error);
}

.form-input--error:focus {
  box-shadow: 0 0 0 3px hsla(0, 72%, 50%, 0.12);
}

.form-error {
  font-size: 0.8125rem;
  color: var(--color-error);
}

textarea.form-input {
  resize: vertical;
  min-height: 80px;
}

/* ==========================================================================
   Navbar
   ========================================================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: white;
  border-bottom: 1px solid var(--color-neutral-200);
  z-index: 100;
  display: flex;
  align-items: center;
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.navbar__brand {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 800;
  color: var(--color-primary-700);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.navbar__brand:hover {
  color: var(--color-primary-800);
}

.navbar__brand-icon {
  font-size: 1.25rem;
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
}

.navbar__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-neutral-600);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast), color var(--transition-fast);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  position: relative;
}

.navbar__link:hover,
.navbar__link--active {
  background: var(--color-primary-50);
  color: var(--color-primary-700);
}

.navbar__badge {
  background: var(--color-error);
  color: white;
  font-size: 0.6875rem;
  font-weight: 500;
  min-width: 18px;
  height: 18px;
  border-radius: 9px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 5px;
}

.navbar__user {
  position: relative;
}

.navbar__user-btn {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-neutral-700);
  background: var(--color-neutral-100);
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 44px;
  transition: background var(--transition-fast);
}

.navbar__user-btn:hover {
  background: var(--color-neutral-200);
}

.navbar__dropdown {
  position: absolute;
  right: 0;
  top: calc(100% + var(--space-1));
  background: white;
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  min-width: 180px;
  padding: var(--space-1);
  display: none;
  z-index: 110;
}

.navbar__dropdown--open {
  display: block;
}

.navbar__dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-neutral-700);
  text-align: left;
  background: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-fast);
  min-height: 40px;
}

.navbar__dropdown-item:hover {
  background: var(--color-neutral-50);
}

.navbar__dropdown-item--danger {
  color: var(--color-error);
}

/* Mobile hamburger */
.navbar__hamburger {
  display: none;
  background: none;
  border: none;
  padding: var(--space-2);
  cursor: pointer;
  min-height: 44px;
  min-width: 44px;
  align-items: center;
  justify-content: center;
}

.navbar__hamburger-icon {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-neutral-700);
  position: relative;
}

.navbar__hamburger-icon::before,
.navbar__hamburger-icon::after {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-neutral-700);
  position: absolute;
  left: 0;
}

.navbar__hamburger-icon::before { top: -6px; }
.navbar__hamburger-icon::after { top: 6px; }

@media (max-width: 640px) {
  .navbar__hamburger {
    display: flex;
  }

  .navbar__links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: white;
    border-bottom: 1px solid var(--color-neutral-200);
    box-shadow: var(--shadow-md);
    padding: var(--space-2) var(--space-4);
    gap: 0;
  }

  .navbar__links--open {
    display: flex;
  }

  .navbar__link {
    width: 100%;
    padding: var(--space-3) var(--space-2);
  }
}

/* ==========================================================================
   Layout Utilities
   ========================================================================== */

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--space-6) var(--space-4);
}

.container--narrow {
  max-width: 480px;
}

.container--mid {
  max-width: 720px;
}

/* ==========================================================================
   Auth Pages (Login / Register)
   ========================================================================== */

.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100dvh - var(--nav-height) - 60px);
  padding: var(--space-6) var(--space-4);
}

.auth-card {
  width: 100%;
  max-width: 400px;
  background: white;
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
}

.auth-card__title {
  margin-bottom: var(--space-1);
}

.auth-card__subtitle {
  font-size: 0.9375rem;
  color: var(--color-neutral-500);
  margin-bottom: var(--space-6);
}

.auth-card__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.auth-card__footer {
  text-align: center;
  margin-top: var(--space-6);
  font-size: 0.875rem;
  color: var(--color-neutral-500);
}

.auth-card__alert {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  border: 1px solid;
}

.auth-card__alert--error {
  background: hsl(0, 72%, 97%);
  color: hsl(0, 72%, 40%);
  border-color: hsl(0, 72%, 90%);
}

.auth-card__alert--success {
  background: hsl(142, 60%, 96%);
  color: hsl(142, 60%, 30%);
  border-color: hsl(142, 60%, 85%);
}

/* ==========================================================================
   Toast
   ========================================================================== */

#toast-root {
  position: fixed;
  bottom: var(--space-4);
  right: var(--space-4);
  z-index: 500;
  display: flex;
  flex-direction: column-reverse;
  gap: var(--space-2);
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background: white;
  border: 1px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-3) var(--space-4);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  max-width: 360px;
  min-width: 220px;
  animation: toast-in 180ms ease forwards;
}

.toast--success { border-left: 3px solid var(--color-success); }
.toast--error { border-left: 3px solid var(--color-error); }
.toast--warning { border-left: 3px solid var(--color-warning); }
.toast--info { border-left: 3px solid var(--color-info); }

.toast__icon {
  flex-shrink: 0;
  font-size: 1.125rem;
}

.toast__message {
  flex: 1;
}

.toast__close {
  background: none;
  border: none;
  padding: var(--space-1);
  cursor: pointer;
  color: var(--color-neutral-400);
  font-size: 1rem;
  line-height: 1;
  min-width: 28px;
  min-height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}

.toast__close:hover {
  background: var(--color-neutral-100);
  color: var(--color-neutral-700);
}

@keyframes toast-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.toast--leaving {
  animation: toast-out 150ms ease forwards;
}

@keyframes toast-out {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(8px); }
}

/* ==========================================================================
   Modal
   ========================================================================== */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: hsla(40, 8%, 10%, 0.4);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  animation: modal-overlay-in 180ms ease;
}

.modal {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 500px;
  max-height: calc(100dvh - var(--space-8));
  overflow-y: auto;
  animation: modal-in 180ms ease;
}

.modal__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-neutral-100);
}

.modal__title {
  font-size: 1.125rem;
}

.modal__close {
  background: none;
  border: none;
  padding: var(--space-2);
  cursor: pointer;
  color: var(--color-neutral-400);
  font-size: 1.25rem;
  line-height: 1;
  border-radius: var(--radius-sm);
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.modal__close:hover {
  background: var(--color-neutral-100);
  color: var(--color-neutral-700);
}

.modal__body {
  padding: var(--space-5) var(--space-6);
}

.modal__footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-neutral-100);
}

@keyframes modal-overlay-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modal-in {
  from { opacity: 0; transform: scale(0.96) translateY(8px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

/* ==========================================================================
   Cookie Banner
   ========================================================================== */

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 300;
  background: white;
  border-top: 1px solid var(--color-neutral-200);
  box-shadow: 0 -4px 16px hsla(40, 8%, 10%, 0.08);
  padding: var(--space-6) var(--space-4);
  animation: slide-up 280ms ease;
}

.cookie-banner__inner {
  max-width: var(--content-max);
  margin: 0 auto;
}

.cookie-banner__title {
  font-size: 1rem;
  margin-bottom: var(--space-2);
}

.cookie-banner__text {
  font-size: 0.875rem;
  color: var(--color-neutral-600);
  margin-bottom: var(--space-4);
  line-height: 1.5;
}

.cookie-banner__categories {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

.cookie-category {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.875rem;
}

.cookie-category__toggle {
  position: relative;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
}

.cookie-category__toggle input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.cookie-category__slider {
  position: absolute;
  inset: 0;
  background: var(--color-neutral-200);
  border-radius: 11px;
  cursor: pointer;
  transition: background var(--transition-fast);
}

.cookie-category__slider::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background: white;
  border-radius: 50%;
  transition: transform var(--transition-fast);
}

.cookie-category__toggle input:checked + .cookie-category__slider {
  background: var(--color-primary-500);
}

.cookie-category__toggle input:checked + .cookie-category__slider::after {
  transform: translateX(18px);
}

.cookie-category__toggle input:disabled + .cookie-category__slider {
  opacity: 0.6;
  cursor: not-allowed;
}

.cookie-category__toggle input:focus-visible + .cookie-category__slider {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

.cookie-banner__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

@keyframes slide-up {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  border-top: 1px solid var(--color-neutral-200);
  padding: var(--space-5) var(--space-4);
  font-size: 0.8125rem;
  color: var(--color-neutral-500);
}

.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
}

.footer-links {
  display: flex;
  gap: var(--space-4);
}

.footer-links a {
  color: var(--color-neutral-500);
  font-size: 0.8125rem;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--color-neutral-700);
  text-decoration: underline;
}

.link-btn {
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: var(--color-neutral-500);
  background: none;
  border: none;
  cursor: pointer;
  text-decoration: none;
  padding: 0;
}

.link-btn:hover {
  color: var(--color-neutral-700);
  text-decoration: underline;
}

/* ==========================================================================
   Legal Pages
   ========================================================================== */

.legal-page {
  padding: var(--space-8) var(--space-4);
}

.legal-page__inner {
  max-width: 720px;
  margin: 0 auto;
}

.legal-page h1 {
  margin-bottom: var(--space-6);
}

.legal-page h2 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

.legal-page h3 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}

.legal-page p {
  margin-bottom: var(--space-4);
  color: var(--color-neutral-700);
}

.legal-page ul, .legal-page ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
  color: var(--color-neutral-700);
}

.legal-page li {
  margin-bottom: var(--space-2);
}

/* ==========================================================================
   Loading Spinner
   ========================================================================== */

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-neutral-200);
  border-top-color: var(--color-primary-500);
  border-radius: 50%;
  animation: spin 600ms linear infinite;
}

.spinner--lg {
  width: 32px;
  height: 32px;
  border-width: 3px;
}

.loading-center {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) 0;
}

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

/* ==========================================================================
   Responsive helpers
   ========================================================================== */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 640px) {
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.25rem; }
  .auth-card { padding: var(--space-6); }
}