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

:root {
  --color-bg: #111010;
  --color-bg-dark: #0a0a0a;

  --color-text: #e0ddd5;
  --color-text-muted: #9e9a90;
  --color-input-bg: rgba(255, 255, 255, 0.06);
  --color-input-border: rgba(242, 225, 190, 0.4);
  --font-display: 'Cinzel', serif;
  --font-body: 'Inter', sans-serif;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

/* ===========================
   Header
   =========================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  padding: 1.25rem 1.5rem;
}

.logo__img {
  width: 64px;
  height: auto;
  transition: transform 0.3s ease;
}

.logo:hover .logo__img {
  transform: scale(1.05);
}

/* ===========================
   Hero
   =========================== */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 6rem 1.5rem 3rem;
}

/* Background silhouette */
.hero__bg {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  pointer-events: none;
}

.hero__bg-img {
  width: 100%;
  max-width: 720px;
  height: auto;
  object-fit: contain;
  opacity: 0.12;
  filter: sepia(0.3) brightness(0.6);
  user-select: none;
}

/* Content */
.hero__content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 480px;
  width: 100%;
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 5vw, 2.5rem);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text);
  margin-bottom: 0.75rem;
}

.hero__subtitle {
  font-size: clamp(0.875rem, 2.5vw, 1rem);
  font-weight: 300;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: 1rem;
}

/* ===========================
   Signup Form
   =========================== */
.signup {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.signup__field {
  width: 100%;
  max-width: 360px;
}

.signup__input {
  width: 100%;
  padding: 0.75rem 1.25rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 300;
  color: var(--color-text);
  background: var(--color-input-bg);
  border: 1px solid var(--color-input-border);
  border-radius: 4px;
  outline: none;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.signup__input::placeholder {
  color: var(--color-text-muted);
  font-weight: 300;
}

.signup__input:focus {
  border-color: var(--color-input-border);
}

/* Sprite button — images/button.webp (371×244, two 371×122 frames) */
.signup__btn {
  --btn-width: 120px;
  --btn-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--btn-width);
  height: var(--btn-height);
  padding: 0;
  border: none;
  background: url('../images/button.png') no-repeat 0 0;
  background-size: var(--btn-width) calc(var(--btn-height) * 2);
  cursor: pointer;
  transition: opacity 0.15s ease;
}

.signup__btn:hover,
.signup__btn:focus-visible {
  background-position: 0 calc(var(--btn-height) * -1);
}

.signup__btn:active {
  opacity: 0.85;
}

.signup__btn-text {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text);
}

/* Message */
.signup__message {
  margin-top: 1rem;
  font-size: 0.85rem;
  min-height: 1.25rem;
  color: var(--color-gold);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.signup__message--visible {
  opacity: 1;
}

.signup__message--error {
  color: #d9534f;
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 480px) {
  .header {
    padding: 1.25rem 1rem;
    width: 100%;
    display: flex;
    justify-content: center;
  }

  .logo__img {
    width: 100px;
    padding-top: 20px;
  }

  .hero {
    padding: 5rem 1rem 2rem;
  }

  .signup__field {
    max-width: 100%;
  }

  .signup__input {
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
  }
}

@media (min-width: 768px) {
  .hero__bg-img {
    max-width: 900px;
  }
}

@media (min-width: 1200px) {
  .header {
    padding: 1.5rem 2rem;
  }

  .logo__img {
    width: 72px;
  }
}