/* ============================================================
   Celestryll — Global Stylesheet
   Colors: Midnight #0F1A2B | Indigo #2D2F7F | Violet #6A6DFF
           Teal #1FA2A0 | Aqua #E8F7F6
   ============================================================ */

/* --- Custom Properties ------------------------------------ */
:root {
  --midnight:   #0F1A2B;
  --indigo:     #2D2F7F;
  --violet:     #6A6DFF;
  --teal:       #1FA2A0;
  --aqua:       #E8F7F6;
  --white:      #ffffff;
  --gray-100:   #F5F7FA;
  --gray-200:   #E8ECF0;
  --gray-400:   #94A3B8;
  --gray-600:   #4A5568;
  --gray-800:   #2D3748;
  --text-dark:  #1A202C;
  --text-muted: #64748B;

  --font-heading: 'Montserrat', sans-serif;
  --font-body:    'Inter', sans-serif;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;

  --shadow-sm:   0 2px 8px rgba(0,0,0,0.07);
  --shadow-md:   0 8px 24px rgba(0,0,0,0.11);
  --shadow-lg:   0 20px 48px rgba(0,0,0,0.16);
  --shadow-teal: 0 8px 24px rgba(31,162,160,0.28);

  --transition: 0.25s ease;
  --max-width: 1200px;
}

/* --- Reset ------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  color: var(--text-dark);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img  { max-width: 100%; height: auto; display: block; }
a    { color: inherit; text-decoration: none; }
ul   { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* --- Typography ------------------------------------------- */
h1, h2, h3, h4, h5 {
  font-family: var(--font-heading);
  line-height: 1.2;
  font-weight: 700;
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.65rem); }
h4 { font-size: 1.1rem; }
p  { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

/* --- Layout --------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.section { padding: 5rem 0; }
.section-alt { background: var(--gray-100); }
.section-dark {
  background: linear-gradient(135deg, var(--midnight), var(--indigo));
  color: var(--aqua);
}
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}
.section-header h2 { color: var(--midnight); margin-bottom: 0.75rem; }
.section-header p  { color: var(--text-muted); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }
.section-dark .section-header h2 { color: var(--aqua); }
.section-dark .section-header p  { color: rgba(232,247,246,0.7); }

/* --- Navigation ------------------------------------------ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--midnight);
  border-bottom: 1px solid rgba(106,109,255,0.2);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.nav-brand img { width: 40px; height: 40px; }
.nav-brand-name {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 2.5px;
  color: var(--aqua);
}
.nav-menu {
  display: flex;
  gap: 0.25rem;
  align-items: center;
}
.nav-link {
  color: rgba(232,247,246,0.72);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.4px;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover,
.nav-link.active { color: var(--aqua); background: rgba(255,255,255,0.06); }
.nav-link.active { color: var(--teal); }
.nav-cta {
  background: var(--teal) !important;
  color: var(--midnight) !important;
  font-weight: 700;
  padding: 0.45rem 1.1rem;
  margin-left: 0.5rem;
}
.nav-cta:hover { background: #18908e !important; color: var(--white) !important; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  border-radius: var(--radius-sm);
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--aqua);
  border-radius: 2px;
  transition: all var(--transition);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Hero ----------------------------------------------- */
.hero {
  background: linear-gradient(135deg, var(--midnight) 0%, #1a1d6e 55%, var(--indigo) 100%);
  color: var(--aqua);
  text-align: center;
  padding: 7rem 1.5rem 6rem;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 20% 30%, rgba(31,162,160,0.13) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 80% 70%, rgba(106,109,255,0.12) 0%, transparent 60%);
  pointer-events: none;
}
.hero-content { position: relative; z-index: 1; max-width: 820px; margin: 0 auto; }
.hero-logo    { width: 130px; height: 130px; margin: 0 auto 2rem; }
.hero h1      { color: var(--aqua); letter-spacing: 4px; margin-bottom: 1rem; }
.hero-tagline {
  font-size: clamp(1.05rem, 2.5vw, 1.35rem);
  color: var(--teal);
  font-family: var(--font-heading);
  font-weight: 300;
  letter-spacing: 1px;
  margin-bottom: 1.25rem;
}
.hero-description {
  font-size: 1.08rem;
  color: rgba(232,247,246,0.72);
  max-width: 580px;
  margin: 0 auto 2.5rem;
  line-height: 1.85;
}
.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* --- Buttons -------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.78rem 1.75rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  letter-spacing: 0.2px;
}
.btn-primary  { background: var(--teal);   color: var(--midnight); }
.btn-primary:hover  { background: #18908e; transform: translateY(-2px); box-shadow: var(--shadow-teal); }
.btn-secondary { background: transparent; color: var(--aqua); border: 1.5px solid rgba(232,247,246,0.38); }
.btn-secondary:hover { border-color: var(--teal); color: var(--teal); transform: translateY(-2px); }
.btn-violet   { background: var(--violet); color: var(--white); }
.btn-violet:hover   { background: #5457e5; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(106,109,255,0.35); }
.btn-outline  { background: transparent;  color: var(--teal); border: 2px solid var(--teal); }
.btn-outline:hover  { background: var(--teal); color: var(--midnight); transform: translateY(-2px); }
.btn-dark     { background: var(--midnight); color: var(--aqua); }
.btn-dark:hover { background: var(--indigo); transform: translateY(-2px); }

/* --- App Cards ------------------------------------------ */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}
.app-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.app-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(31,162,160,0.3);
}
.app-card-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.9rem;
}
.icon-teal   { background: linear-gradient(135deg, var(--teal), #137e7c); }
.icon-violet { background: linear-gradient(135deg, var(--violet), var(--indigo)); }
.icon-indigo { background: linear-gradient(135deg, var(--indigo), var(--midnight)); }
.app-card h3 { color: var(--midnight); margin-bottom: 0.5rem; font-size: 1.25rem; }
.app-card p  { color: var(--text-muted); font-size: 0.93rem; flex-grow: 1; margin-bottom: 1.5rem; }
.app-card .btn { align-self: flex-start; }

/* --- Tag ------------------------------------------------ */
.tag {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.tag-teal   { background: rgba(31,162,160,0.12); color: var(--teal); }
.tag-violet { background: rgba(106,109,255,0.13); color: var(--violet); }
.tag-indigo { background: rgba(45,47,127,0.1);   color: var(--indigo); }

/* --- Feature List --------------------------------------- */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.75rem;
}
.feature-item { display: flex; gap: 1rem; align-items: flex-start; }
.feature-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), var(--violet));
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.1rem;
}
.feature-text h4 { color: var(--midnight); margin-bottom: 0.25rem; font-size: 1rem; }
.feature-text p  { color: var(--text-muted); font-size: 0.88rem; margin: 0; }

/* --- Screenshots ---------------------------------------- */
.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.25rem;
}
.screenshot-placeholder {
  aspect-ratio: 9/16;
  background: linear-gradient(145deg, var(--gray-100), var(--gray-200));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-400);
  font-size: 0.8rem;
  text-align: center;
  border: 2px dashed var(--gray-200);
  padding: 1rem;
}

/* --- Download Section ----------------------------------- */
.download-box {
  background: linear-gradient(135deg, var(--midnight), var(--indigo));
  color: var(--aqua);
  text-align: center;
  padding: 3.5rem 2rem;
  border-radius: var(--radius-lg);
  margin: 3rem 0;
}
.download-box h3 { color: var(--aqua); margin-bottom: 0.75rem; }
.download-box p  { color: rgba(232,247,246,0.68); margin-bottom: 2rem; }
.badge-row { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.18);
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius-sm);
  color: var(--aqua);
  font-weight: 600;
  font-size: 0.88rem;
  transition: all var(--transition);
}
.store-badge:hover { background: rgba(31,162,160,0.22); border-color: var(--teal); transform: translateY(-2px); }
.store-badge-icon { font-size: 1.3rem; }

/* --- Page Hero (inner pages) ----------------------------- */
.page-hero {
  background: linear-gradient(135deg, var(--midnight), var(--indigo));
  padding: 4.5rem 1.5rem 3.5rem;
  text-align: center;
  color: var(--aqua);
}
.page-hero h1 { color: var(--aqua); margin-bottom: 0.75rem; letter-spacing: 1px; }
.page-hero p  { color: rgba(232,247,246,0.72); font-size: 1.1rem; max-width: 600px; margin: 0 auto; }
.breadcrumb {
  display: flex; align-items: center; justify-content: center;
  gap: 0.4rem; margin-bottom: 1rem;
  font-size: 0.82rem; color: rgba(232,247,246,0.45);
}
.breadcrumb a { color: var(--teal); }
.breadcrumb a:hover { text-decoration: underline; }

/* --- Contact -------------------------------------------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: start; }
.contact-info h3 { color: var(--midnight); margin-bottom: 1.5rem; }
.contact-detail { display: flex; align-items: flex-start; gap: 1rem; margin-bottom: 1.5rem; }
.contact-detail-icon {
  width: 44px; height: 44px; min-width: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), var(--violet));
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 1.1rem;
}
.contact-detail-text strong { display: block; color: var(--midnight); margin-bottom: 0.2rem; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.8px; }
.contact-detail-text span,
.contact-detail-text a { color: var(--text-muted); font-size: 0.95rem; }
.contact-detail-text a:hover { color: var(--teal); }
.contact-form-wrap { background: var(--white); border: 1px solid var(--gray-200); border-radius: var(--radius-md); padding: 2.5rem; box-shadow: var(--shadow-sm); }
.contact-form-wrap h3 { color: var(--midnight); margin-bottom: 1.5rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; font-weight: 600; font-size: 0.83rem; color: var(--gray-800); margin-bottom: 0.4rem; letter-spacing: 0.3px; }
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%; padding: 0.72rem 1rem;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-family: var(--font-body); font-size: 0.95rem;
  color: var(--text-dark); background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { outline: none; border-color: var(--teal); box-shadow: 0 0 0 3px rgba(31,162,160,0.14); }
.form-group textarea { resize: vertical; min-height: 130px; }
.form-note { font-size: 0.78rem; color: var(--text-muted); margin-top: 0.75rem; text-align: center; }

/* --- Privacy / Legal ------------------------------------ */
.legal-content { max-width: 800px; margin: 0 auto; }
.legal-meta {
  background: var(--gray-100);
  border-left: 4px solid var(--teal);
  padding: 1rem 1.5rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 2.5rem;
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.7;
}
.legal-content h2 { font-size: 1.45rem; color: var(--midnight); margin: 2.5rem 0 0.75rem; padding-bottom: 0.5rem; border-bottom: 2px solid var(--gray-200); }
.legal-content h3 { font-size: 1.1rem; color: var(--indigo); margin: 1.5rem 0 0.5rem; }
.legal-content p,
.legal-content li { color: var(--gray-600); margin-bottom: 0.75rem; line-height: 1.82; font-size: 0.95rem; }
.legal-content ul { list-style: disc; padding-left: 1.5rem; margin-bottom: 1rem; }
.legal-content a { color: var(--teal); }
.legal-content a:hover { text-decoration: underline; }

/* --- Stats --------------------------------------------- */
.stats-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 2rem; text-align: center; }
.stat-item h3 { font-size: 2.4rem; color: var(--teal); margin-bottom: 0.25rem; }
.stat-item p  { color: var(--text-muted); font-size: 0.85rem; margin: 0; }

/* --- Value Cards --------------------------------------- */
.value-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.5rem; }
.value-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  text-align: center;
  transition: all var(--transition);
}
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(106,109,255,0.3); }
.value-card-icon { font-size: 2.25rem; margin-bottom: 0.75rem; }
.value-card h4 { color: var(--midnight); margin-bottom: 0.4rem; }
.value-card p  { color: var(--text-muted); font-size: 0.87rem; margin: 0; }

/* --- Bio Card ------------------------------------------ */
.bio-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  align-items: center;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  max-width: 700px;
}
.bio-avatar {
  width: 96px; height: 96px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--teal), var(--violet));
  display: flex; align-items: center; justify-content: center;
  font-size: 2.5rem; color: white;
}
.bio-text h3 { color: var(--midnight); margin-bottom: 0.2rem; }
.bio-text .bio-role { color: var(--teal); font-size: 0.88rem; font-weight: 600; letter-spacing: 0.5px; text-transform: uppercase; margin-bottom: 0.75rem; }
.bio-text p { color: var(--text-muted); font-size: 0.93rem; margin: 0; }

/* --- Treble Clef Accent -------------------------------- */
.treble-accent { color: rgba(31,162,160,0.35); font-size: 1.6rem; line-height: 1; }

/* --- Footer --------------------------------------------- */
.site-footer {
  background: var(--midnight);
  color: rgba(232,247,246,0.58);
  padding: 4.5rem 0 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}
.footer-brand { display: flex; align-items: center; gap: 0.65rem; margin-bottom: 0.75rem; }
.footer-brand img  { width: 34px; height: 34px; }
.footer-brand-name { font-family: var(--font-heading); font-size: 1.05rem; font-weight: 700; letter-spacing: 2.5px; color: var(--aqua); }
.footer-tagline { color: rgba(232,247,246,0.48); font-size: 0.87rem; margin-bottom: 0; line-height: 1.75; }
.footer-col h4 { color: var(--aqua); font-size: 0.78rem; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 1rem; }
.footer-col ul li { margin-bottom: 0.55rem; }
.footer-col ul a { color: rgba(232,247,246,0.52); font-size: 0.88rem; transition: color var(--transition); }
.footer-col ul a:hover { color: var(--teal); }
.footer-bottom {
  border-top: 1px solid rgba(232,247,246,0.09);
  padding-top: 2rem;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
}
.footer-bottom p { font-size: 0.82rem; margin: 0; }
.footer-social { display: flex; gap: 0.6rem; }
.social-link {
  width: 34px; height: 34px; border-radius: 50%;
  background: rgba(255,255,255,0.07);
  display: flex; align-items: center; justify-content: center;
  color: rgba(232,247,246,0.55); font-size: 0.82rem; font-weight: 700;
  transition: all var(--transition);
}
.social-link:hover { background: var(--teal); color: var(--midnight); }

/* --- Responsive ----------------------------------------- */
@media (max-width: 1024px) {
  .footer-grid   { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .contact-grid  { grid-template-columns: 1fr; gap: 2rem; }
  .bio-card      { grid-template-columns: 1fr; text-align: center; }
  .bio-avatar    { margin: 0 auto; }
}
@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px; left: 0; right: 0;
    background: var(--midnight);
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.32s ease;
    border-bottom: 1px solid rgba(106,109,255,0.2);
  }
  .nav-menu.open   { max-height: 360px; }
  .nav-link        { display: block; padding: 0.95rem 1.5rem; border-top: 1px solid rgba(255,255,255,0.04); width: 100%; border-radius: 0; }
  .nav-cta         { margin: 0.75rem 1.5rem; text-align: center; border-radius: var(--radius-sm) !important; }
  .nav-toggle      { display: flex; }
  .section         { padding: 3rem 0; }
  .footer-grid     { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom   { flex-direction: column; text-align: center; }
  .cards-grid      { grid-template-columns: 1fr; }
  .form-row        { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .hero            { padding: 4.5rem 1rem 3.5rem; }
  .hero-logo       { width: 100px; height: 100px; }
  .btn             { padding: 0.65rem 1.2rem; font-size: 0.9rem; }
  .download-box    { padding: 2.5rem 1rem; }
}