/* ========================================
   AITERLAB — Groovebox Style
   ======================================== */

/* --- 1. Custom Properties --- */
:root {
  --bg: #c4b49a;
  --text: #2a2a2a;
  --accent: #d65d0e;
  --card-bg: #f5f0e6;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.12),
            0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.18),
                  0 4px 12px rgba(0, 0, 0, 0.1);
  --radius: 16px;
  --font-heading: 'Oswald', sans-serif;
  --font-body: Georgia, 'Times New Roman', serif;
  --transition: 0.3s ease;
}

/* --- 2. Reset / Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}

/* --- 3. Grain Overlay (disabled) --- */
.grain {
  display: none;
}

/* --- 4. Typography --- */
h1, h2, h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  line-height: 1.1;
}

/* --- 5. Layout --- */
main {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 24px 60px;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
}

/* --- 6. Hero Card --- */
.hero {
  width: 100%;
  display: flex;
  justify-content: center;
}

.hero-card {
  width: 100%;
  max-width: 960px;
  background: #d6cdbf;
  border: none;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 36px 48px 48px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: left;
  transition: box-shadow var(--transition);
}

.hero-card:hover {
  box-shadow: var(--shadow-hover);
}

.hero-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
}

.hero-title {
  font-size: 1.6rem;
  letter-spacing: 0.05em;
  text-transform: none;
  flex-shrink: 0;
}

.title-aither {
  font-weight: 700;
  color: var(--text);
}

.title-lab {
  font-weight: 200;
  color: var(--accent);
}

.hero-separator {
  width: 1px;
  align-self: stretch;
  background: var(--text);
  opacity: 0.25;
  flex-shrink: 0;
}

.hero-tagline {
  font-family: var(--font-body);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.4;
  color: var(--text);
}

.hero-body {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 48px 0 36px;
}

/* --- Chat Demo (hero) --- */
.chat-demo {
  width: 100%;
  max-width: 800px;
  aspect-ratio: 16 / 9;
  margin: 0 auto;
  border-radius: 10px;
  overflow: hidden;
  background: #c9bead;
  box-shadow: inset 0 1px 4px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
}

.chat-messages {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 48px;
  padding: 36px 36px;
}

.chat-bubble {
  max-width: 60%;
  padding: 14px 18px;
  border-radius: 12px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.07),
              0 1px 3px rgba(0, 0, 0, 0.05);
}

.chat-user {
  align-self: flex-end;
  background: #dfd7c8;
  border-bottom-right-radius: 4px;
}

.chat-ai {
  align-self: flex-start;
  background: #d5cbb8;
  border-bottom-left-radius: 4px;
}

/* Chat input bar */
.chat-input {
  padding: 0 36px 24px;
}

.chat-input-field {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #dfd7c8;
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 18px;
  padding: 10px 10px 10px 16px;
  max-width: 420px;
  margin: 0 auto;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.chat-input-plus {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(0, 0, 0, 0.15);
  color: var(--text);
  font-size: 1rem;
  font-weight: 300;
  opacity: 0.4;
  flex-shrink: 0;
}

.chat-input-text {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--text);
}

.chat-input-spacer {
  flex: 1;
}

.chat-input-send {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: #e5ddd0;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 1rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-left: auto;
  cursor: pointer;
  transition: background var(--transition);
  user-select: none;
  -webkit-user-select: none;
}

.chat-input-send::after {
  content: '';
  display: block;
  width: 8px;
  height: 8px;
  border-left: 2px solid var(--accent);
  border-top: 2px solid var(--accent);
  transform: rotate(45deg) translateY(2px);
}

.chat-input-send:hover {
  background: #f0e8db;
}

.chat-cursor {
  display: inline-block;
  width: 1.5px;
  height: 1em;
  background: var(--text);
  margin-left: 1px;
  vertical-align: text-bottom;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.hero-sub {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(0.75rem, 1.6vw, 0.9rem);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
}

/* --- 7. Social Links --- */
.socials {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 100px;
  background: #dfd7c8;
  color: var(--text);
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 6px 14px;
  border: 1px solid var(--accent);
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08),
              0 1px 4px rgba(0, 0, 0, 0.06);
  transition: all var(--transition);
}

.social-link:hover,
.social-link:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.12),
              0 2px 6px rgba(0, 0, 0, 0.08);
  outline: none;
}

.social-link[data-placeholder="true"] {
  cursor: default;
}

.social-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* --- 8. Timeline --- */
.timeline {
  width: 100%;
  display: flex;
  justify-content: center;
}

.timeline-strip {
  width: 100%;
  max-width: 960px;
  background: none;
  border: none;
  border-radius: 0;
  box-shadow: none;
  padding: 20px;
  transition: box-shadow var(--transition);
  position: relative;
}

.timeline-strip:hover {
  box-shadow: none;
}

.timeline-track {
  display: flex;
  gap: 18px;
  overflow-x: auto;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 4px 0;
}

.timeline-track::-webkit-scrollbar {
  display: none;
}

.timeline-card {
  flex-shrink: 0;
  width: 120px;
  aspect-ratio: 1 / 1;
  padding: 16px 20px;
  background: #d6cdbf;
  border: none;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition);
  user-select: none;
}

.timeline-card:hover,
.timeline-card:focus-visible {
  box-shadow: var(--shadow-hover);
  background: #ccc2b3;
  outline: none;
}

.timeline-card-title {
  font-family: var(--font-heading);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text);
  white-space: nowrap;
}

.timeline-card-date {
  font-size: 0.65rem;
  color: var(--accent);
  opacity: 0.7;
  margin-top: 4px;
  font-family: var(--font-heading);
  letter-spacing: 0.05em;
}

.timeline-empty {
  text-align: center;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text);
  opacity: 0.4;
  padding: 16px;
  display: none;
}

.timeline-empty.visible {
  display: block;
}

/* --- 9. About --- */
.about {
  width: 100%;
  display: flex;
  justify-content: center;
}

.about-card {
  width: 100%;
  max-width: 960px;
  padding: 40px 48px;
}

.section-title {
  display: inline-block;
  font-size: 1.6rem;
  font-weight: 700;
  text-transform: none;
  letter-spacing: 0.05em;
  color: var(--accent);
  background: #d0c8b8;
  padding: 3px 14px;
  border-radius: 8px 8px 0 0;
  margin-bottom: 0;
}

.about-text {
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text);
  max-width: 600px;
  background: #d5cbb8;
  padding: 14px 18px;
  border-radius: 0 12px 12px 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.07),
              0 1px 3px rgba(0, 0, 0, 0.05);
}

/* --- 10. Support Button --- */
.btn-support {
  display: none;
  cursor: pointer;
}

.btn-support:hover,
.btn-support:focus-visible {
  color: var(--accent);
  border-color: var(--accent);
  outline: none;
}

/* --- 11. Modal --- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

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

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
}

.modal-content {
  position: relative;
  background: var(--card-bg);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 40px;
  max-width: 520px;
  width: calc(100% - 48px);
  max-height: 80vh;
  overflow-y: auto;
  transform: translateY(20px);
  transition: transform 0.25s ease;
}

.modal.open .modal-content {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.8rem;
  cursor: pointer;
  opacity: 0.6;
  transition: opacity var(--transition);
  line-height: 1;
}

.modal-close:hover {
  opacity: 1;
}

/* Modal content typography */
#modal-body h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 8px;
}

#modal-body .modal-date {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text);
  opacity: 0.5;
  margin-bottom: 16px;
}

#modal-body p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text);
  opacity: 0.9;
}

/* Donate modal */
.donate-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}

.donate-link {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text);
  text-decoration: none;
  padding: 14px 20px;
  border: 1px solid rgba(214, 93, 14, 0.25);
  border-radius: 10px;
  text-align: center;
  transition: all var(--transition);
}

.donate-link:hover {
  border-color: var(--accent);
  background: rgba(214, 93, 14, 0.1);
  color: var(--accent);
}

.donate-link[data-placeholder="true"] {
  opacity: 0.4;
  cursor: default;
}

/* --- 12. Responsive --- */

/* Tablet */
@media (max-width: 1024px) {
  main {
    padding: 32px 20px 48px;
    gap: 32px;
  }

  .hero-card {
    padding: 48px 36px;
  }
}

/* Mobile */
@media (max-width: 768px) {
  main {
    padding: 16px 12px 40px;
    gap: 24px;
  }

  .hero-card {
    padding: 24px 16px 32px;
    border-radius: 12px;
    aspect-ratio: auto;
  }

  .hero-header {
    flex-direction: column;
    gap: 4px;
  }

  .hero-separator {
    display: none;
  }

  .hero-title {
    font-size: 1.4rem;
  }

  .hero-tagline {
    font-size: 0.95rem;
  }

  /* Chat demo on mobile */
  .chat-demo {
    aspect-ratio: 2 / 3;
  }

  .chat-bubble {
    max-width: 85%;
    font-size: 0.95rem;
    padding: 12px 16px;
  }

  .chat-messages {
    gap: 20px;
    padding: 20px 16px;
  }

  .chat-input {
    padding: 0 16px 14px;
  }

  .chat-input-field {
    padding: 10px 10px 10px 14px;
    gap: 8px;
    border-radius: 16px;
    max-width: 100%;
  }

  .chat-input-plus {
    width: 22px;
    height: 22px;
    font-size: 0.9rem;
  }

  .chat-input-text {
    font-size: 0.9rem;
  }

  .chat-input-send {
    width: 28px;
    height: 28px;
    border-radius: 6px;
  }

  .chat-input-send::after {
    width: 8px;
    height: 8px;
  }

  .hero-body {
    padding: 20px 0 16px;
  }

  /* Follow along */
  .hero-sub {
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    margin-bottom: 6px;
  }

  /* Social buttons — single row, grouped in center */
  .socials {
    flex-wrap: nowrap;
    justify-content: center;
    gap: 14px;
  }

  .social-link {
    min-width: 0;
    width: 42px;
    height: 42px;
    padding: 0;
    border-radius: 8px;
    justify-content: center;
  }

  .social-link span {
    display: none;
  }

  .social-icon {
    width: 20px;
    height: 20px;
  }

  .timeline-strip {
    padding: 14px;
    border-radius: 12px;
  }

  .timeline-card {
    min-width: 85px;
    padding: 12px 14px;
  }

  .about-card {
    padding: 24px 16px;
  }

  .section-title {
    font-size: 1.3rem;
  }

  .about-text {
    font-size: 0.95rem;
  }

  .btn-support {
    padding: 6px 14px;
    font-size: 0.7rem;
  }

  .modal-content {
    padding: 28px 24px;
    width: calc(100% - 32px);
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .timeline-track {
    scroll-behavior: auto;
  }
}

/* Small mobile */
@media (max-width: 420px) {
  .hero-card {
    padding: 20px 14px 16px;
  }

  .hero-title {
    font-size: 1.2rem;
  }

  .hero-tagline {
    font-size: 0.85rem;
  }

  .social-link {
    padding: 8px 2px;
  }

  .social-icon {
    width: 18px;
    height: 18px;
  }
}