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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.5;
  color: var(--color-ivory);
  background: var(--page-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color 0.3s ease;
}

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

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

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  margin: 0 0 var(--space-3);
  letter-spacing: -0.03em;
}

p {
  margin: 0 0 var(--space-4);
}

p:last-child {
  margin-bottom: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 2.85rem;
  padding: 0.7rem 1.35rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-weight: 700;
  font-size: var(--text-sm);
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform 0.2s var(--ease-out), background 0.2s ease,
    border-color 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
  text-align: center;
  background: transparent;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:active {
  transform: translateY(0);
}

.btn--primary {
  background: var(--gradient-coral);
  color: var(--color-white);
  box-shadow: var(--shadow-glow-coral);
}

.btn--primary:hover {
  filter: brightness(1.05);
}

.btn--secondary {
  background: var(--gradient-aqua);
  color: var(--color-ink);
  box-shadow: var(--shadow-glow-aqua);
}

.btn--gold {
  background: var(--gradient-gold);
  color: var(--color-ink);
}

.btn--ghost {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--color-ivory);
}

.btn--ghost:hover {
  border-color: var(--color-aqua);
  background: rgba(30, 200, 200, 0.08);
}

.btn--outline {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--color-ivory);
}

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 2.35rem;
  height: 2.35rem;
  border: 1px solid var(--border-strong);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-ivory);
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.theme-toggle:hover {
  border-color: var(--color-aqua);
  background: rgba(30, 200, 200, 0.1);
  transform: translateY(-1px);
}

.theme-toggle svg {
  width: 1.15rem;
  height: 1.15rem;
}

.theme-toggle__sun,
.theme-toggle__moon {
  grid-area: 1 / 1;
}

html[data-theme="light"] .theme-toggle__sun {
  display: none;
}

html:not([data-theme="light"]) .theme-toggle__moon {
  display: none;
}

.auth-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: 1.25rem var(--page-pad-x) 0.25rem;
}

.btn--sm {
  min-height: 2.25rem;
  padding: 0.45rem 1rem;
  font-size: var(--text-xs);
}

.btn--block {
  width: 100%;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: var(--space-4);
}

.field label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ivory-dim);
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 3rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-strong);
  background: var(--input-bg);
  color: var(--color-ivory);
  outline: none;
}

.field textarea {
  min-height: 6rem;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--color-aqua);
  box-shadow: 0 0 0 3px rgba(0, 212, 212, 0.15);
}

.field input::placeholder {
  color: var(--color-ivory-mute);
}

.hint {
  font-size: var(--text-xs);
  color: var(--color-ivory-mute);
}

.flash {
  position: sticky;
  top: 0.75rem;
  z-index: 40;
  margin: 0 var(--page-pad-x) var(--space-3);
  padding: 0.85rem 1rem;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
}

.flash--success {
  background: rgba(47, 214, 123, 0.16);
  border: 1px solid rgba(47, 214, 123, 0.35);
  color: #86efac;
}

.flash--error {
  background: rgba(255, 45, 98, 0.16);
  border: 1px solid rgba(255, 45, 98, 0.35);
  color: #fda4af;
}

.brand-mark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-lg);
  letter-spacing: -0.04em;
}

.brand-mark span {
  background: var(--hero-brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}