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

:root {
  --bg: #0a0b10;
  --bg-elevated: #12141c;
  --bg-card: #181b26;
  --border: rgba(255, 255, 255, 0.08);
  --text: #f0f1f5;
  --text-muted: #9ca3b8;
  --accent: #8b6cff;
  --accent-hover: #a78fff;
  --accent-glow: rgba(139, 108, 255, 0.35);
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --header-h: 72px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(139, 108, 255, 0.15), transparent),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(56, 189, 248, 0.06), transparent);
  pointer-events: none;
  z-index: -1;
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  padding: 0 clamp(1.25rem, 4vw, 3rem);
  background: rgba(10, 11, 16, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.logo__icon {
  font-size: 1.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.25rem;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn:active {
  transform: scale(0.98);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.15);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #6d4ce6);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-hover), #7c5ce8);
  box-shadow: 0 6px 28px var(--accent-glow);
}

.btn-lg {
  padding: 0.85rem 2rem;
  font-size: 1rem;
}

.btn-block {
  width: 100%;
  padding: 0.75rem;
}

/* Hero */
.hero {
  text-align: center;
  padding: clamp(3rem, 10vw, 6rem) clamp(1.25rem, 4vw, 3rem) clamp(2rem, 6vw, 4rem);
  max-width: 720px;
  margin: 0 auto;
}

.hero__badge {
  display: inline-block;
  padding: 0.35rem 0.85rem;
  margin-bottom: 1.25rem;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-hover);
  background: rgba(139, 108, 255, 0.12);
  border: 1px solid rgba(139, 108, 255, 0.25);
  border-radius: 999px;
}

.hero__title {
  font-size: clamp(2.75rem, 8vw, 4.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.1;
  background: linear-gradient(180deg, #fff 30%, rgba(255, 255, 255, 0.65));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  margin-top: 1.25rem;
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-muted);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.hero .btn-primary {
  margin-top: 2rem;
}

/* Benefits */
.benefits {
  padding: 0 clamp(1.25rem, 4vw, 3rem) clamp(4rem, 8vw, 6rem);
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.section-title {
  text-align: center;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-top: 0.5rem;
  margin-bottom: 2.5rem;
  font-size: 1.05rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

/* Card with image hover zoom */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card:hover {
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(139, 108, 255, 0.15);
  border-color: rgba(139, 108, 255, 0.2);
}

.card__image-wrap {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.card__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover .card__image {
  transform: scale(1.08);
}

.card__body {
  padding: 1.25rem 1.35rem 1.5rem;
}

.card__title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.card__text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Footer */
.footer {
  margin-top: auto;
  padding: 1.5rem clamp(1.25rem, 4vw, 3rem);
  text-align: center;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.875rem;
}

/* Modal */
.modal {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition);
}

.modal.is-open {
  opacity: 1;
  visibility: visible;
}

.modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
}

.modal__panel {
  position: relative;
  width: 100%;
  max-width: 400px;
  padding: 2rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
  transform: translateY(12px) scale(0.98);
  transition: transform var(--transition);
}

.modal.is-open .modal__panel {
  transform: translateY(0) scale(1);
}

.modal__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
}

.modal__close:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.modal__title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.modal__form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.field__label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

.field__input {
  padding: 0.7rem 0.9rem;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.field__input::placeholder {
  color: #5c6378;
}

.field__input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-message {
  font-size: 0.85rem;
  color: #f87171;
}

.modal__footer {
  margin-top: 1.25rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.link-register {
  color: var(--accent-hover);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}

.link-register:hover {
  color: #c4b5fd;
}

.link-btn {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  cursor: pointer;
}

.register-step[hidden] {
  display: none;
}

.register-hint {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin: -0.5rem 0 1.25rem;
  line-height: 1.55;
}

.register-hint strong {
  color: var(--text);
  font-weight: 600;
}

.field__input--code {
  text-align: center;
  font-size: 1.35rem;
  letter-spacing: 0.35em;
  font-variant-numeric: tabular-nums;
}

/* Register stub page */
.stub-page {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem clamp(1.25rem, 4vw, 3rem);
}

.stub-card {
  text-align: center;
  max-width: 440px;
  padding: 2.5rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}

.stub-card__icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.stub-card h1 {
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.stub-card__text {
  color: var(--text-muted);
  margin-bottom: 1.75rem;
  line-height: 1.6;
}

.stub-card .btn-primary {
  display: inline-flex;
}