@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Sans:ital,wght@0,300;0,400;0,500;0,600;1,400&display=swap');

:root {
  --bg-primary: #050f0a;
  --bg-secondary: #0a1a10;
  --bg-card: #0d2018;
  --bg-card-hover: #112a1f;
  --green-primary: #00e676;
  --green-secondary: #00c853;
  --green-dim: #1a4d35;
  --green-glow: rgba(0, 230, 118, 0.12);
  --green-glow-strong: rgba(0, 230, 118, 0.25);
  --text-primary: #e8f5e9;
  --text-secondary: #81c784;
  --text-muted: #4caf50;
  --border: rgba(0, 230, 118, 0.18);
  --border-focus: rgba(0, 230, 118, 0.55);
  --shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
  --shadow-green: 0 0 40px rgba(0, 230, 118, 0.08);
}

/* LIGHT THEME */
[data-theme="light"] {
  --bg-primary: #f5faf7;
  --bg-secondary: #eaf4ee;
  --bg-card: #ffffff;
  --text-primary: #0d2018;
  --text-secondary: #1a4d35;
  --text-muted: #2e7d52;
  --border: rgba(0, 180, 90, 0.2);
  --border-focus: rgba(0, 180, 90, 0.5);
  --shadow: 0 4px 30px rgba(0,0,0,0.1);
  --shadow-green: 0 0 40px rgba(0,200,100,0.06);
}

/* RESET */
*, *::before, *::after {
  margin: 0; padding: 0;
  box-sizing: border-box;
  max-width: 100%;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  transition: background 0.4s, color 0.4s;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at 15% 10%, rgba(0,230,118,0.05) 0%, transparent 55%),
              radial-gradient(ellipse at 85% 85%, rgba(0,150,80,0.04) 0%, transparent 55%);
  pointer-events: none;
  z-index: 0;
}

/* SCROLLBAR */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--green-primary); border-radius: 4px; }

/* ===== HEADER ===== */
header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(5,15,10,0.93);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background 0.4s;
  width: 100%;
}

[data-theme="light"] header {
  background: rgba(240,247,241,0.93);
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 5%;
  height: 65px;
  position: relative;
}

.logo {
  font-family: 'Syne', sans-serif;
  font-weight: 500;
  font-size: 1.1rem;
  color: var(--green-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  z-index: 2;
}

.logo span { color: var(--text-primary); }

[data-theme="light"] .logo span { color: #1b5e20 !important; }
[data-theme="light"] .logo em { color: #00897b !important; }

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
  white-space: nowrap;
}

.nav-links a:hover { color: var(--green-primary); }

/* NAV RIGHT */
.nav-right {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
  z-index: 2;
}

/* THEME TOGGLE */
.theme-toggle {
  position: relative;
  width: 56px;
  height: 28px;
  cursor: pointer;
  flex-shrink: 0;
}

.theme-toggle input { display: none; }

.toggle-track {
  width: 100%;
  height: 100%;
  background: var(--bg-secondary);
  border-radius: 99px;
  display: flex;
  align-items: center;
  padding: 3px;
  transition: background 0.3s;
  border: 1px solid rgba(0, 230, 118, 0.3);
}

.toggle-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green-primary), var(--green-secondary));
  transition: transform 0.35s cubic-bezier(.34,1.56,.64,1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  box-shadow: 0 2px 8px rgba(0, 230, 118, 0.4);
}

[data-theme="light"] .toggle-thumb { transform: translateX(28px); }

/* HAMBURGER */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 5px;
  flex-shrink: 0;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--green-primary);
  transition: 0.3s;
  border-radius: 2px;
}

/* ===== HERO ===== */
.hero {
  position: relative; z-index: 1;
  text-align: center;
  padding: 72px 5% 52px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.hero-badge {
  display: inline-block;
  background: var(--green-glow);
  border: 1px solid var(--border);
  color: var(--green-primary);
  font-size: 0.78rem; font-weight: 700;
  letter-spacing: 1.8px; text-transform: uppercase;
  padding: 6px 18px; border-radius: 50px; margin-bottom: 22px;
}

.hero h1 {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  font-size: clamp(2rem, 5vw, 3.6rem);
  line-height: 1.15;
  margin-bottom: 18px;
}

.hero h1 em { font-style: normal; color: var(--green-primary); }

.hero > p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 40px;
}

/* ===== CALC CARD ===== */
.calc-card {
  position: relative; z-index: 1;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 36px;
  max-width: 620px;
  margin: 0 auto;
  box-shadow: var(--shadow), var(--shadow-green);
  width: 100%;
}

.calc-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  border-radius: 20px 20px 0 0;
  background: linear-gradient(90deg, transparent, var(--green-primary), var(--green-secondary), transparent);
}

.calc-card h2 {
  font-family: 'Syne', sans-serif;
  font-size: 1.05rem; font-weight: 700;
  color: var(--green-primary);
  margin-bottom: 24px; text-align: center; letter-spacing: 0.5px;
}

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block; font-size: 0.87rem; font-weight: 600;
  color: var(--text-secondary); margin-bottom: 8px;
}

.form-group input[type="date"] {
  width: 100%; padding: 13px 16px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: 10px; color: var(--text-primary);
  font-family: 'DM Sans', sans-serif; font-size: 1rem;
  outline: none; transition: border-color 0.2s, box-shadow 0.2s;
  appearance: none; -webkit-appearance: none; cursor: pointer;
}

.form-group input[type="date"]:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--green-glow);
}

.form-group input::-webkit-calendar-picker-indicator {
  filter: invert(1) sepia(1) saturate(2) hue-rotate(100deg); cursor: pointer;
}

.btn-calculate {
  width: 100%; padding: 15px;
  background: var(--green-primary); color: #050f0a;
  border: none; border-radius: 10px;
  font-family: 'Syne', sans-serif; font-size: 1.02rem; font-weight: 700;
  cursor: pointer; transition: all 0.2s; margin-top: 6px;
}

.btn-calculate:hover {
  background: var(--green-secondary);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,230,118,0.28);
}

.btn-calculate:active { transform: translateY(0); }

/* ===== RESULTS ===== */
#results {
  display: none; margin-top: 28px;
  animation: fadeUp 0.5s ease;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-header {
  text-align: center; padding: 22px 16px;
  background: linear-gradient(135deg, rgba(0,230,118,0.1), rgba(0,120,60,0.07));
  border: 1px solid var(--border); border-radius: 14px; margin-bottom: 14px;
}

.result-header .hb-date {
  font-family: 'Syne', sans-serif; font-size: 1.75rem; font-weight: 800;
  color: var(--green-primary); margin-bottom: 4px;
}

.result-header p { font-size: 0.88rem; color: var(--text-secondary); }

.results-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 12px; margin-bottom: 14px;
}

.result-item {
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px; text-align: center;
  transition: border-color 0.2s;
}

.result-item:hover { border-color: rgba(0,230,118,0.4); }

.result-item .r-label {
  font-size: 0.76rem; color: var(--text-muted); font-weight: 600;
  letter-spacing: 0.8px; text-transform: uppercase; margin-bottom: 6px;
}

.result-item .r-value {
  font-family: 'Syne', sans-serif; font-size: 1.1rem;
  font-weight: 700; color: var(--green-primary); word-break: break-word;
}

.result-item.full { grid-column: 1 / -1; }

/* COUNTDOWN */
.countdown-box {
  background: linear-gradient(135deg, rgba(0,230,118,0.09), rgba(0,100,50,0.06));
  border: 1px solid rgba(0,230,118,0.4); border-radius: 14px;
  padding: 20px; text-align: center; margin-bottom: 14px;
}

.countdown-box h4 {
  font-family: 'Syne', sans-serif; font-size: 0.8rem; font-weight: 700;
  color: var(--text-secondary); letter-spacing: 1.5px; text-transform: uppercase;
  margin-bottom: 16px;
}

.countdown-units {
  display: flex; justify-content: center;
  gap: 16px; flex-wrap: wrap;
}

.cu { text-align: center; }

.cu .cn {
  font-family: 'Syne', sans-serif; font-size: 2.2rem; font-weight: 800;
  color: var(--green-primary); display: block; line-height: 1;
}

.cu .cl {
  font-size: 0.7rem; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 1px;
}

/* ZODIAC */
.zodiac-box {
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: 12px; padding: 16px 20px;
  display: flex; align-items: center; gap: 14px; margin-bottom: 14px;
}

.z-icon { font-size: 2.2rem; flex-shrink: 0; }
.z-name { font-family: 'Syne', sans-serif; font-size: 1.1rem; font-weight: 700; color: var(--green-primary); }
.z-dates { font-size: 0.82rem; color: var(--text-secondary); }
.z-desc { font-size: 0.82rem; color: var(--text-muted); margin-top: 2px; }

/* SHARE */
.share-btn {
  width: 100%; padding: 13px;
  background: transparent; border: 1px solid var(--border);
  border-radius: 10px; color: var(--text-secondary);
  font-family: 'DM Sans', sans-serif; font-size: 0.93rem; font-weight: 600;
  cursor: pointer; transition: all 0.2s;
  display: flex; align-items: center; justify-content: center; gap: 8px;
}

.share-btn:hover {
  border-color: var(--green-primary); color: var(--green-primary);
  background: var(--green-glow);
}

/* ===== STATS ===== */
.stats-section {
  position: relative; z-index: 1;
  max-width: 1200px; margin: 60px auto; padding: 0 5%;
  width: 100%;
}

.stats-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }

.stat-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px 20px; text-align: center;
}

.stat-num {
  font-family: 'Syne', sans-serif; font-size: 2.2rem;
  font-weight: 800; color: var(--green-primary);
}

.stat-label { font-size: 0.87rem; color: var(--text-secondary); margin-top: 4px; }

/* ===== SECTIONS ===== */
.section {
  position: relative; z-index: 1;
  max-width: 1200px; margin: 0 auto 70px; padding: 0 5%;
  width: 100%;
}

.section-label {
  font-size: 0.76rem; font-weight: 700; letter-spacing: 2px;
  text-transform: uppercase; color: var(--green-primary); margin-bottom: 10px;
}

.section h2 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 800;
  color: var(--text-primary); margin-bottom: 12px;
}

.section h2 em { font-style: normal; color: var(--green-primary); }
.section > p { color: var(--text-secondary); max-width: 560px; margin-bottom: 38px; font-size: 0.98rem; }

/* STEPS */
.steps-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }

.step-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 28px 22px;
  transition: border-color 0.2s, transform 0.2s;
  position: relative; overflow: hidden;
}

.step-card:hover { border-color: var(--green-primary); transform: translateY(-3px); }

.step-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--green-primary), transparent);
  opacity: 0; transition: opacity 0.3s;
}

.step-card:hover::before { opacity: 1; }

.step-num {
  font-family: 'Syne', sans-serif; font-size: 0.78rem; font-weight: 700;
  color: var(--green-primary); letter-spacing: 1px; margin-bottom: 12px;
}

.step-icon { font-size: 2rem; margin-bottom: 12px; display: block; }
.step-card h3 { font-family: 'Syne', sans-serif; font-size: 1rem; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.step-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.65; }

/* FEATURES */
.features-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 18px; }

.feature-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 22px;
  display: flex; gap: 16px; transition: border-color 0.2s, transform 0.2s;
}

.feature-card:hover { border-color: var(--green-dim); transform: translateY(-2px); }
.feature-icon { font-size: 1.8rem; flex-shrink: 0; }
.feature-card h3 { font-family: 'Syne', sans-serif; font-size: 0.97rem; font-weight: 700; color: var(--text-primary); margin-bottom: 6px; }
.feature-card p { font-size: 0.86rem; color: var(--text-secondary); line-height: 1.6; }

/* CONTENT */
.content-section {
  position: relative; z-index: 1;
  max-width: 860px; margin: 0 auto 70px; padding: 0 5%;
  width: 100%;
}

.content-section h2 {
  font-family: 'Syne', sans-serif; font-size: 1.7rem; font-weight: 800;
  color: var(--text-primary); margin: 40px 0 14px;
}

.content-section h2:first-child { margin-top: 0; }

.content-section h3 {
  font-family: 'Syne', sans-serif; font-size: 1.1rem; font-weight: 700;
  color: var(--green-primary); margin: 26px 0 10px;
}

.content-section p { color: var(--text-secondary); font-size: 0.96rem; line-height: 1.82; margin-bottom: 14px; }
.content-section ul { margin: 10px 0 16px 20px; }
.content-section ul li { color: var(--text-secondary); font-size: 0.96rem; line-height: 1.8; margin-bottom: 6px; }
.content-section ul li::marker { color: var(--green-primary); }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 10px; }

.faq-item {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 12px; overflow: hidden; transition: border-color 0.2s;
}

.faq-item.open { border-color: var(--green-dim); }

.faq-question {
  width: 100%; padding: 18px 22px; background: none; border: none;
  color: var(--text-primary); font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem; font-weight: 600; text-align: left;
  cursor: pointer; display: flex; justify-content: space-between;
  align-items: center; gap: 14px; transition: color 0.2s;
}

.faq-question:hover { color: var(--green-primary); }

.faq-arrow {
  flex-shrink: 0; width: 22px; height: 22px;
  border: 1px solid var(--border); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.75rem; color: var(--green-primary); transition: transform 0.3s;
}

.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq-item.open .faq-answer { max-height: 400px; }
.faq-answer p { padding: 0 22px 18px; color: var(--text-secondary); font-size: 0.91rem; line-height: 1.75; margin: 0; }

/* ===== FOOTER ===== */
footer {
  position: relative; z-index: 1;
  background: var(--bg-secondary); border-top: 1px solid var(--border);
  padding: 50px 5% 30px; width: 100%;
}

.footer-inner { max-width: 1200px; margin: 0 auto; }
.footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand p { font-size: 0.87rem; color: var(--text-secondary); line-height: 1.7; max-width: 290px; margin-top: 12px; }

.footer-col h4 {
  font-family: 'Syne', sans-serif; font-size: 0.82rem; font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase; color: var(--text-primary); margin-bottom: 16px;
}

.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col a { color: var(--text-secondary); text-decoration: none; font-size: 0.88rem; transition: color 0.2s; }
.footer-col a:hover { color: var(--green-primary); }

.footer-bottom {
  border-top: 1px solid var(--border); padding-top: 22px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 10px;
}

.footer-bottom p, .footer-bottom a { font-size: 0.83rem; color: var(--text-muted); text-decoration: none; transition: color 0.2s; }
.footer-bottom a:hover { color: var(--green-primary); }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }

/* ===== INNER PAGES ===== */
.page-hero {
  position: relative; z-index: 1;
  text-align: center; padding: 60px 5% 40px;
  max-width: 860px; margin: 0 auto; width: 100%;
}

.page-hero h1 {
  font-family: 'Syne', sans-serif;
  font-size: clamp(1.7rem, 4vw, 2.6rem); font-weight: 800;
  color: var(--text-primary); margin-bottom: 14px;
}

.page-hero p { color: var(--text-secondary); font-size: 0.98rem; }

.page-content {
  position: relative; z-index: 1;
  max-width: 860px; margin: 0 auto 70px; padding: 0 5%;
  width: 100%;
}

.page-content h2 { font-family: 'Syne', sans-serif; font-size: 1.35rem; font-weight: 700; color: var(--text-primary); margin: 32px 0 12px; }
.page-content h2:first-child { margin-top: 0; }
.page-content p { color: var(--text-secondary); font-size: 0.96rem; line-height: 1.8; margin-bottom: 14px; }
.page-content ul { margin: 10px 0 16px 22px; }
.page-content ul li { color: var(--text-secondary); font-size: 0.96rem; line-height: 1.8; margin-bottom: 6px; }
.page-content ul li::marker { color: var(--green-primary); }
.page-content a { color: var(--green-primary); text-decoration: none; }
.page-content a:hover { text-decoration: underline; }

/* CONTACT FORM */
.contact-form {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 16px; padding: 32px; margin-top: 30px;
}

.contact-form label { display: block; font-size: 0.87rem; font-weight: 600; color: var(--text-secondary); margin-bottom: 8px; }

.contact-form input,
.contact-form textarea,
.contact-form select {
  width: 100%; padding: 13px 16px; margin-bottom: 20px;
  background: var(--bg-secondary); border: 1px solid var(--border);
  border-radius: 10px; color: var(--text-primary);
  font-family: 'DM Sans', sans-serif; font-size: 0.96rem;
  outline: none; transition: border-color 0.2s; resize: vertical;
}

.contact-form input:focus, .contact-form textarea:focus { border-color: var(--border-focus); }
.contact-form textarea { min-height: 130px; }

.btn-submit {
  padding: 14px 30px; background: var(--green-primary); color: #050f0a;
  border: none; border-radius: 10px;
  font-family: 'Syne', sans-serif; font-size: 0.95rem; font-weight: 700;
  cursor: pointer; transition: all 0.2s;
}

.btn-submit:hover { background: var(--green-secondary); transform: translateY(-1px); }

.success-msg {
  display: none; padding: 16px 20px;
  background: rgba(0,230,118,0.1); border: 1px solid var(--border);
  border-radius: 10px; color: var(--green-primary);
  font-size: 0.93rem; font-weight: 600; margin-top: 16px; text-align: center;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .steps-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1/-1; }
}

@media (max-width: 640px) {
  /* Hide desktop nav links */
  .nav-links {
    display: none;
    flex-direction: column;
    position: fixed;
    top: 65px;
    left: 0;
    right: 0;
    width: 100%;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    padding: 20px 5%;
    gap: 16px;
    z-index: 99;
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
  }

  [data-theme="light"] .nav-links {
    background: var(--bg-primary);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    font-size: 1rem;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    display: block;
    width: 100%;
  }

  .nav-links li:last-child a {
    border-bottom: none;
  }

  /* Show hamburger */
  .hamburger { display: flex; }

  /* Hero */
  .hero { padding: 50px 4% 40px; }

  /* Calc card */
  .calc-card { padding: 22px 16px; }

  /* Results */
  .results-grid { grid-template-columns: 1fr; }

  /* Countdown */
  .countdown-units { gap: 10px; }
  .cu .cn { font-size: 1.6rem; }

  /* Zodiac */
  .zodiac-box { flex-direction: column; text-align: center; }

  /* Half bday date */
  .result-header .hb-date { font-size: 1.3rem; }

  /* Footer */
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-links { justify-content: center; }
}