@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&display=swap');

:root {
  /* Sophisticated Monochrome Palette */
  --bg-alabaster: #F9F8F6;
  --bg-taupe: #EBE5DE;
  --text-charcoal: #1A1A1A;
  --text-grey: #6C6863;
  --accent-gold: #D4AF37;
  --white: #FFFFFF;

  /* Spacing */
  --spacing-container: 1600px;

  /* Typography */
  --font-display: 'Playfair Display', serif;
  --font-body: 'Inter', sans-serif;

  /* Borders */
  --border-width: 1px;
  --border-radius: 0px;
  /* Architectural precision */
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-alabaster);
  color: var(--text-charcoal);
  line-height: 1.625;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.1;
  color: var(--text-charcoal);
  letter-spacing: -0.02em;
}

p {
  color: var(--text-grey);
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.5s ease;
}

a:hover {
  color: var(--accent-gold);
}

/* Utilities */
.container {
  max-width: var(--spacing-container);
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 10;
}

.text-gold {
  color: var(--accent-gold);
}

.text-italic {
  font-style: italic;
}

/* Paper Noise Overlay */
.noise-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* Grid Lines */
.grid-lines-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  display: flex;
  justify-content: space-between;
  padding: 0 2rem;
  max-width: var(--spacing-container);
  margin: 0 auto;
  left: 50%;
  transform: translateX(-50%);
}

.grid-line {
  width: 1px;
  height: 100%;
  background-color: rgba(26, 26, 26, 0.05);
}

/* Navigation */
.navbar {
  padding: 2rem 0;
  border-bottom: 1px solid rgba(26, 26, 26, 0.1);
  background: var(--bg-alabaster);
  position: relative;
  z-index: 100;
}

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

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  gap: 3rem;
  list-style: none;
}

.nav-link {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 500;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  border-radius: var(--border-radius);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-weight: 500;
  cursor: pointer;
  position: relative;
  transition: all 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  border: 1px solid var(--text-charcoal);
}

.btn-primary {
  background-color: var(--text-charcoal);
  color: var(--white);
  overflow: hidden;
}

/* Gold slide effect */
.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--accent-gold);
  transform: translateX(-100%);
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  z-index: 0;
}

.btn-primary:hover {
  border-color: var(--accent-gold);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.btn-primary:hover::before {
  transform: translateX(0);
}

.btn-primary span {
  position: relative;
  z-index: 1;
}

.btn-outline {
  background: transparent;
  color: var(--text-charcoal);
}

.btn-outline:hover {
  background-color: var(--text-charcoal);
  color: var(--white);
}

/* Hero Section */
.hero {
  padding: 8rem 0;
  position: relative;
}

.hero h1 {
  font-size: 5rem;
  margin-bottom: 2rem;
  line-height: 0.95;
}

.hero p {
  font-size: 1.125rem;
  max-width: 600px;
  margin-bottom: 4rem;
}

/* Features Grid */
.section {
  padding: 6rem 0;
  border-top: 1px solid rgba(26, 26, 26, 0.1);
}

.section-title {
  font-size: 3rem;
  margin-bottom: 4rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 4rem;
}

.feature-card {
  padding: 3rem 2rem;
  border-top: 1px solid var(--text-charcoal);
  transition: transform 0.7s ease, border-color 0.7s ease;
  background: transparent;
}

.feature-card:hover {
  border-color: var(--accent-gold);
  transform: translateY(-10px);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 2rem;
  color: var(--text-charcoal);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

/* Auth Forms */
.auth-container {
  max-width: 500px;
  margin: 4rem auto;
  padding: 4rem;
  background: var(--bg-alabaster);
  /* Ensure opacity */
  border-top: 2px solid var(--text-charcoal);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.05);
}

.form-group {
  margin-bottom: 2rem;
}

.form-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
  color: var(--text-grey);
}

.form-input {
  width: 100%;
  padding: 0.75rem 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--text-charcoal);
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text-charcoal);
  transition: border-color 0.5s ease;
  border-radius: 0;
}

.form-input:focus {
  outline: none;
  border-color: var(--accent-gold);
}

.form-input::placeholder {
  font-family: var(--font-display);
  font-style: italic;
  color: #aaa;
}

.input-error {
  border-color: #ef4444;
}

.error-message {
  font-size: 0.75rem;
  color: #ef4444;
  margin-top: 0.5rem;
  display: none;
}

.error-message.visible {
  display: block;
}

.form-footer {
  margin-top: 3rem;
  text-align: center;
  font-size: 0.875rem;
}

.form-footer a {
  border-bottom: 1px solid transparent;
}

.form-footer a:hover {
  border-bottom-color: var(--accent-gold);
}

/* Animations */
.animate-enter {
  opacity: 0;
  animation: fadeUp 1s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.delay-1 {
  animation-delay: 0.2s;
}

.delay-2 {
  animation-delay: 0.4s;
}

.delay-3 {
  animation-delay: 0.6s;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Footer */
footer {
  padding: 4rem 0;
  border-top: 1px solid rgba(26, 26, 26, 0.1);
  text-align: center;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-grey);
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 3rem;
  }

  .grid-lines-container {
    display: none;
  }

  .nav-links {
    gap: 1rem;
    font-size: 0.7rem;
  }
}