/* 
  POSTWAKE PREMIUM MINIMAL DESIGN SYSTEM
  Inspired by ferryman.io, Linear, and Vercel.
  Focuses on typography, thin borders, high contrast, and subtle interactive details.
*/

:root {
  /* Color Palette */
  --bg-primary: #000000;
  --bg-secondary: #0a0a0a;
  --bg-tertiary: #161616;
  
  --text-primary: #ffffff;
  --text-secondary: #a3a3a3;
  --text-muted: #666666;
  --text-dark: #404040;
  
  --border-muted: #1c1c1c;
  --border-active: #333333;
  --border-focus: #444444;
  
  --accent: #2563eb;          /* Electric Blue */
  --accent-glow: rgba(37, 99, 235, 0.15);
  --success: #10b981;         /* Emerald Green */
  --success-bg: rgba(16, 185, 129, 0.1);
  --error: #ef4444;           /* Rose Red */
  
  /* Fonts & Spacing */
  --font-sans: 'Geist', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --transition-fast: 0.15s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html, body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

/* Faint Grid Background Effect */
body {
  position: relative;
  min-height: 100vh;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 40px 40px;
}

/* Background Radial Glow for Hero Depth */
body::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1200px;
  height: 600px;
  background: radial-gradient(circle 400px at 50% 100px, rgba(37, 99, 235, 0.04), transparent 80%);
  pointer-events: none;
  z-index: 0;
}

/* Container Wrap */
.container {
  max-width: 72rem; /* 1152px */
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
  z-index: 1;
}

/* Header & Navigation */
header {
  border-bottom: 1px solid var(--border-muted);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background-color: rgba(0, 0, 0, 0.7);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: var(--transition-fast);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--text-primary);
}

.logo-icon {
  font-size: 1.2rem;
  animation: float 4s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}

nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

nav a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-fast);
  font-weight: 500;
}

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

/* Buttons System */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 0.85rem;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition-fast);
  text-decoration: none;
  border: 1px solid transparent;
}

.btn-primary {
  background-color: var(--text-primary);
  color: var(--bg-primary);
  border-color: var(--text-primary);
}

.btn-primary:hover {
  background-color: #e5e5e5;
  border-color: #e5e5e5;
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-active);
}

.btn-secondary:hover {
  background-color: var(--bg-secondary);
  border-color: var(--border-focus);
}

.btn-large {
  padding: 0.75rem 1.5rem;
  font-size: 0.95rem;
  border-radius: 8px;
}

/* Hero Section */
.hero {
  padding: 8rem 0 4rem;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-muted);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  letter-spacing: -0.01em;
}

.hero-pill .status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--success);
  box-shadow: 0 0 8px var(--success);
}

h1 {
  font-size: clamp(2.5rem, 7vw, 4.25rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  max-width: 50rem;
  margin: 0 auto 1.5rem;
}

.hero p {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 38rem;
  margin: 0 auto 2.5rem;
  font-weight: 400;
}

/* Interactive Playground (The Core Visual) */
.playground-section {
  padding: 2rem 0 6rem;
}

.playground-title-box {
  text-align: center;
  margin-bottom: 3rem;
}

.playground-title-box h2 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.playground-title-box p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.playground-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-muted);
  border-radius: 12px;
  padding: 2rem;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

/* Composer Panel */
.composer-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  border-right: 1px solid var(--border-muted);
  padding-right: 2rem;
}

.composer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.composer-title {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 600;
}

.platform-selector {
  display: flex;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-muted);
  padding: 0.2rem;
  border-radius: 6px;
  gap: 0.15rem;
}

.platform-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.3rem 0.6rem;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.platform-btn.active {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-muted);
}

.composer-input-wrapper {
  position: relative;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-muted);
  border-radius: 8px;
  padding: 1rem;
  transition: var(--transition-fast);
}

.composer-input-wrapper:focus-within {
  border-color: var(--border-focus);
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.02);
}

.composer-textarea {
  width: 100%;
  height: 140px;
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  resize: none;
  outline: none;
  line-height: 1.5;
  scrollbar-width: none; /* Hide scrollbar for Firefox */
  -ms-overflow-style: none; /* Hide scrollbar for IE/Edge */
}

.composer-textarea::-webkit-scrollbar {
  display: none; /* Hide scrollbar for Chrome/Safari */
}

.composer-textarea::placeholder {
  color: var(--text-muted);
}

.composer-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 0.5rem;
}

.composer-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.char-counter {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.char-counter.warning {
  color: var(--error);
  font-weight: 500;
}

.composer-tips {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.composer-tips code {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-muted);
  padding: 0.1rem 0.3rem;
  border-radius: 4px;
  font-family: monospace;
  color: var(--text-secondary);
}

/* Previews Panel */
.previews-panel {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  max-height: 440px;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.previews-panel::-webkit-scrollbar {
  width: 4px;
}
.previews-panel::-webkit-scrollbar-track {
  background: transparent;
}
.previews-panel::-webkit-scrollbar-thumb {
  background: var(--border-active);
  border-radius: 10px;
}

.preview-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-muted);
  border-radius: 8px;
  padding: 1.25rem;
  transition: var(--transition-normal);
  position: relative;
  opacity: 0.95;
}

.preview-card.excluded {
  opacity: 0.25;
  border-style: dashed;
  border-color: rgba(239, 68, 68, 0.15);
}

.preview-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  padding-bottom: 0.5rem;
}

.platform-badge {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
}

.platform-badge-dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--success);
}

.preview-card.excluded .platform-badge-dot {
  background-color: var(--text-muted);
}

.preview-action-status {
  font-size: 0.7rem;
  color: var(--text-muted);
  background-color: rgba(255, 255, 255, 0.03);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  border: 1px solid var(--border-muted);
  font-weight: 500;
}

.preview-card.excluded .preview-action-status {
  color: var(--error);
  background-color: rgba(239, 68, 68, 0.05);
  border-color: rgba(239, 68, 68, 0.15);
}

/* Realistic Social Post Layout */
.post-layout {
  display: flex;
  gap: 0.75rem;
}

.post-avatar {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.post-main {
  flex-grow: 1;
  min-width: 0;
}

.post-author-row {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.2rem;
  font-size: 0.8rem;
}

.post-author-name {
  color: var(--text-primary);
  font-weight: 600;
}

.post-author-handle {
  color: var(--text-muted);
}

.post-timestamp {
  color: var(--text-dark);
}

.preview-card-content {
  font-size: 0.85rem;
  color: #e5e5e5; /* Lighter gray for improved contrast on pitch black */
  white-space: pre-wrap;
  word-break: break-word;
  line-height: 1.5;
}

/* Thread Preview Nodes with Vertical Connecting Line */
.thread-container {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.thread-item {
  display: flex;
  gap: 0.75rem;
  position: relative;
}

/* Connecting line running from bottom of one avatar to top of the next */
.thread-item:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 1.125rem; /* Center of avatar (2.25rem / 2) */
  top: 2.25rem;   /* Bottom of avatar */
  bottom: -1.25rem; /* Extends to next item avatar */
  width: 2px;
  background-color: var(--border-muted);
}

.thread-item-content-wrapper {
  flex-grow: 1;
  min-width: 0;
}

.thread-item-num {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-bottom: 0.15rem;
  font-weight: 500;
}

/* Product Features Grid */
.features-section {
  padding: 6rem 0;
  border-top: 1px solid var(--border-muted);
}

.section-header {
  margin-bottom: 4rem;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1rem;
  max-width: 32rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-muted);
  border-radius: 8px;
  padding: 2rem;
  transition: var(--transition-fast);
}

.feature-card:hover {
  border-color: var(--border-active);
  transform: translateY(-2px);
}

.feature-icon {
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 1.25rem;
  display: inline-flex;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* Dynamic Platform Support Chips */
.chips-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.platform-chip {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-muted);
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 500;
  transition: var(--transition-fast);
}

.platform-chip:hover {
  color: var(--text-primary);
  border-color: var(--border-active);
}

.platform-chip.upcoming {
  color: var(--text-muted);
  border-style: dashed;
}

.platform-chip .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--success);
}

.platform-chip.upcoming .dot {
  background-color: var(--text-dark);
}

/* Pricing Grid */
.pricing-section {
  padding: 6rem 0;
  border-top: 1px solid var(--border-muted);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
  gap: 1.5rem;
  align-items: stretch;
}

.pricing-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-muted);
  border-radius: 10px;
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  transition: var(--transition-fast);
}

.pricing-card:hover {
  border-color: var(--border-active);
}

.pricing-card.popular {
  border-color: var(--border-focus);
  position: relative;
}

.pricing-card.popular::before {
  content: "Popular";
  position: absolute;
  top: -12px;
  left: 1.5rem;
  background-color: var(--text-primary);
  color: var(--bg-primary);
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
}

.pricing-tier {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.pricing-price {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.pricing-price span {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 400;
}

.pricing-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.pricing-features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  flex-grow: 1;
}

.pricing-features-list li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.pricing-features-list li::before {
  content: "✓";
  color: var(--text-primary);
  font-weight: 600;
}

/* Waitlist (Newsletter/Access) Form */
.waitlist-section {
  padding: 8rem 0;
  border-top: 1px solid var(--border-muted);
  text-align: center;
}

.waitlist-box {
  max-width: 32rem;
  margin: 0 auto;
}

.waitlist-box h2 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.waitlist-box p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: 2.5rem;
}

.waitlist-form {
  display: flex;
  gap: 0.5rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-muted);
  padding: 0.4rem;
  border-radius: 8px;
  margin-bottom: 1rem;
  transition: var(--transition-fast);
}

.waitlist-form:focus-within {
  border-color: var(--border-focus);
}

.waitlist-input {
  flex-grow: 1;
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-sans);
  color: var(--text-primary);
  font-size: 0.9rem;
  padding: 0.5rem 0.75rem;
}

.waitlist-input::placeholder {
  color: var(--text-muted);
}

.waitlist-form button {
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
}

.form-status {
  font-size: 0.8rem;
  min-height: 1.5rem;
  color: var(--text-muted);
  transition: var(--transition-fast);
}

.form-status.success {
  color: var(--success);
}

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

/* Footer Section */
footer {
  border-top: 1px solid var(--border-muted);
  background-color: var(--bg-secondary);
  padding: 5rem 0 3rem;
  color: var(--text-muted);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 4rem;
  margin-bottom: 4rem;
}

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

.footer-brand .desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  max-width: 16rem;
}

.footer-links-col h4 {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.25rem;
  font-weight: 600;
}

.footer-links-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links-col a {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-links-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2rem;
  border-top: 1px solid var(--border-muted);
  font-size: 0.75rem;
}

.footer-socials {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-socials a {
  color: var(--text-muted);
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-socials a:hover {
  color: var(--text-primary);
}

/* Responsive Breakpoints */
@media (max-width: 900px) {
  .playground-grid {
    grid-template-columns: 1fr;
  }
  .composer-panel {
    border-right: none;
    border-bottom: 1px solid var(--border-muted);
    padding-right: 0;
    padding-bottom: 2rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 600px) {
  .hero {
    padding: 6rem 0 3rem;
  }
  h1 {
    font-size: 2.25rem;
  }
  .waitlist-form {
    flex-direction: column;
    background: transparent;
    border: none;
    padding: 0;
    gap: 0.5rem;
  }
  .waitlist-input {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-muted);
    border-radius: 8px;
    padding: 0.75rem 1rem;
  }
  .waitlist-form button {
    width: 100%;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
}