/* =============================================
   CSS RESET & CUSTOM PROPERTIES
   ============================================= */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* -----------------------------------------------
   DARK THEME (default)
   Primary: #F0A07B  |  Secondary: #4A274F
----------------------------------------------- */
:root,
[data-theme="dark"] {
  --primary:        #F0A07B;
  --primary-dark:   #d4845a;
  --secondary:      #4A274F;
  --accent:         #f5c4a8;   /* light peach — readable on dark bg */

  --bg:             #1a0f1e;
  --bg-card:        #261530;
  --bg-section:     #200f28;
  --bg-stats:       #4A274F;

  --text:           #f0e6f6;
  --text-muted:     #b89ec4;
  --text-on-primary:#1a0f1e;
  --border:         #3d1f45;
  --white:          #ffffff;

  --shadow:         0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-card:    0 4px 20px rgba(0, 0, 0, 0.35);

  --font:           'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  --radius:         12px;
  --radius-sm:      8px;
  --transition:     0.3s ease;

  /* Theme toggle icon */
  --toggle-icon:    "☀";
}

/* -----------------------------------------------
   LIGHT THEME
   Primary: #2BAE66  |  Secondary: #2BAE66
----------------------------------------------- */
[data-theme="light"] {
  --primary:        #2BAE66;
  --primary-dark:   #1f8f50;
  --secondary:      #2BAE66;
  --accent:         #1f8f50;

  --bg:             #f0faf4;
  --bg-card:        #ffffff;
  --bg-section:     #e2f5ea;
  --bg-stats:       #2BAE66;

  --text:           #0d2b1a;
  --text-muted:     #3d7a55;
  --text-on-primary:#ffffff;
  --border:         #b2dfc4;
  --white:          #ffffff;

  --shadow:         0 8px 32px rgba(43, 174, 102, 0.14);
  --shadow-card:    0 4px 20px rgba(43, 174, 102, 0.1);

  --toggle-icon:    "☾";
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background-color var(--transition), color var(--transition);
}

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

ul {
  list-style: none;
}

code {
  font-family: 'Courier New', monospace;
  font-size: 0.85em;
  background: var(--border);
  padding: 0.1em 0.4em;
  border-radius: 4px;
  color: var(--accent);
}

/* In dark mode, boost code contrast explicitly */
[data-theme="dark"] code {
  background: #3d1f45;
  color: #f5c4a8;
}

/* =============================================
   REUSABLE COMPONENTS
   ============================================= */

/* ------ Buttons (BEM: .btn, .btn--primary, .btn--outline) ------ */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform var(--transition),
              box-shadow var(--transition),
              background var(--transition),
              color var(--transition);
}

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

.btn--primary:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(240, 160, 123, 0.4);
}

.btn--outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn--outline:hover {
  background: var(--primary);
  color: var(--text-on-primary);
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(240, 160, 123, 0.4);
}

/* ------ Section Header (BEM: .section-header) ------ */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header__title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--text);
  margin-bottom: 0.5rem;
}

.section-header__underline {
  width: 60px;
  height: 4px;
  background: var(--primary);
  border-radius: 2px;
  margin: 0 auto 1rem;
  animation: expandLine 1s ease forwards;
}

.section-header__subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 520px;
  margin: 0 auto;
}

@keyframes expandLine {
  from { width: 0; }
  to   { width: 60px; }
}

/* =============================================
   HEADER & NAVBAR  (BEM: .header, .nav)
   ============================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(26, 15, 30, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}

[data-theme="light"] .header {
  background: rgba(240, 250, 244, 0.92);
}

.nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.nav__logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: 1px;
  flex-shrink: 0;
}

.nav__links {
  display: flex;
  gap: 2rem;
}

.nav__link {
  color: var(--text);
  font-weight: 500;
  position: relative;
  transition: color var(--transition);
}

/* Animated underline on nav links */
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition);
}

.nav__link:hover,
.nav__link--active {
  color: var(--primary);
}

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* ------ Theme Toggle (BEM: .theme-toggle) ------ */
.theme-toggle {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  cursor: pointer;
  color: var(--text);
  transition: background var(--transition),
              border-color var(--transition),
              transform var(--transition);
}

.theme-toggle:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
  transform: rotate(20deg);
}

.hamburger {
  display: none;
  background: none;
  border: none;
  color: var(--text);
  font-size: 1.5rem;
  cursor: pointer;
}

/* =============================================
   BANNER SECTION  (BEM: .banner)
   ============================================= */
.banner {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 4rem;
  padding: 8rem 2rem 4rem;
  max-width: 1200px;
  margin: 0 auto;
}

.banner__content {
  animation: fadeInLeft 0.8s ease forwards;
}

.banner__badge {
  display: inline-block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.35rem 1rem;
  border-radius: 50px;
  margin-bottom: 1.5rem;
  letter-spacing: 0.5px;
}

.banner__title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  color: var(--text);
  line-height: 1.15;
  margin-bottom: 1.2rem;
}

.banner__title--accent {
  color: var(--primary);
}

.banner__subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  max-width: 480px;
  margin-bottom: 2rem;
}

.banner__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ------ Banner Visual: 2x2 floating cards ------ */
.banner__visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  animation: fadeInRight 0.8s ease forwards;
}

.banner__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  text-align: center;
  font-weight: 600;
  color: var(--text);
  font-size: 0.95rem;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
}

.banner__card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

/* Stagger the float animation per card */
.banner__card--1 { animation: float 4s ease-in-out infinite; }
.banner__card--2 { animation: float 4s ease-in-out infinite 0.5s; }
.banner__card--3 { animation: float 4s ease-in-out infinite 1s; }
.banner__card--4 { animation: float 4s ease-in-out infinite 1.5s; }

.banner__card-icon {
  font-size: 2rem;
}

/* =============================================
   FEATURES SECTION  (BEM: .features, .feature-card)
   ============================================= */
.features {
  background: var(--bg-section);
  padding: 6rem 2rem;
  transition: background var(--transition);
}

.features__grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.75rem;
}

/* ------ Feature Card ------ */
.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 2rem;
  border: 1px solid var(--border);
  border-top: 4px solid var(--primary); /* overridden per modifier */
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  /* subtle glow in top-left corner */
  content: '';
  position: absolute;
  top: -30px;
  left: -30px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: var(--primary);
  opacity: 0.06;
  transition: opacity var(--transition);
}

.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.feature-card:hover::before {
  opacity: 0.12;
}

/* Modifier: top border color per card */
.feature-card--purple { border-top-color: #4A274F; }
.feature-card--pink   { border-top-color: #F0A07B; }
.feature-card--cyan   { border-top-color: #00c9ff; }
.feature-card--green  { border-top-color: #2BAE66; }
.feature-card--orange { border-top-color: #f7971e; }
.feature-card--blue   { border-top-color: #4facfe; }

.feature-card__icon {
  font-size: 2.2rem;
  margin-bottom: 1rem;
  display: block;
}

.feature-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0.6rem;
}

.feature-card__desc {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.feature-card__tag {
  display: inline-block;
  background: var(--bg-section);
  border: 1px solid var(--border);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.2rem 0.75rem;
  border-radius: 50px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* =============================================
   STATS STRIP  (BEM: .stats)
   ============================================= */
.stats {
  background: var(--bg-stats);
  padding: 3.5rem 2rem;
  transition: background var(--transition);
}

.stats__grid {
  max-width: 900px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stats__number {
  display: block;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1;
  margin-bottom: 0.4rem;
}

.stats__label {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.75);
  font-weight: 500;
}

/* =============================================
   CTA SECTION  (BEM: .cta)
   ============================================= */
.cta {
  padding: 7rem 2rem;
  text-align: center;
}

.cta__inner {
  max-width: 640px;
  margin: 0 auto;
}

.cta__title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  color: var(--text);
  margin-bottom: 1rem;
}

.cta__subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 2.5rem;
}

/* ------ CTA Form ------ */
.cta__form-group {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.cta__input {
  flex: 1;
  min-width: 220px;
  padding: 0.8rem 1.25rem;
  border-radius: 50px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.cta__input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(240, 160, 123, 0.2);
}

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

.cta__note {
  margin-top: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* =============================================
   FOOTER  (BEM: .footer)
   ============================================= */
.footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 2rem;
  transition: background var(--transition), border-color var(--transition);
}

.footer__inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer__logo {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
}

.footer__copy {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer__links {
  display: flex;
  gap: 1.5rem;
}

.footer__link {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer__link:hover {
  color: var(--primary);
}

/* =============================================
   KEYFRAME ANIMATIONS
   ============================================= */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-12px); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* =============================================
   RESPONSIVE — TABLET (max 900px)
   ============================================= */
@media (max-width: 900px) {
  .banner {
    grid-template-columns: 1fr;
    text-align: center;
    padding-top: 7rem;
    gap: 3rem;
  }

  .banner__subtitle {
    margin: 0 auto 2rem;
  }

  .banner__actions {
    justify-content: center;
  }

  .banner__visual {
    max-width: 400px;
    margin: 0 auto;
  }

  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}

/* =============================================
   RESPONSIVE — MOBILE (max 600px)
   ============================================= */
@media (max-width: 600px) {
  .nav__links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-card);
    padding: 1.5rem 2rem;
    gap: 1.25rem;
    border-bottom: 1px solid var(--border);
  }

  .nav__links.open {
    display: flex;
  }

  .hamburger {
    display: block;
  }

  .banner__visual {
    grid-template-columns: 1fr 1fr;
  }

  .features__grid {
    grid-template-columns: 1fr;
  }

  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .cta__form-group {
    flex-direction: column;
    align-items: stretch;
  }

  .cta__input,
  .cta__submit {
    width: 100%;
    border-radius: var(--radius-sm);
  }

  .btn {
    padding: 0.65rem 1.4rem;
    font-size: 0.9rem;
  }
}