:root {
  --primary: #22c55e;
  --primary-dark: #16a34a;
  --accent: #38bdf8;
  --bg: #020617;
  --bg-soft: #020617;
  --card-bg: #020617;
  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --border-soft: #1f2937;
  --radius-lg: 18px;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.9);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #0b1220 0, #020617 45%, #000 100%);
  color: var(--text-main);
}

/* Layout */

.container {
  width: min(1100px, 100% - 2rem);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: linear-gradient(
    to bottom,
    rgba(15, 23, 42, 0.96),
    rgba(15, 23, 42, 0.7),
    transparent
  );
  border-bottom: 1px solid rgba(148, 163, 184, 0.4);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 0;
}

/* Logo */

.logo {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
}

.logo-icon {
  width: 34px;
  height: 34px;
  border-radius: 999px;
  background: radial-gradient(
    circle at top left,
    rgba(34, 197, 94, 0.3),
    rgba(8, 47, 73, 1)
  );
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(34, 197, 94, 0.7);
}

.logo-icon i {
  color: #bbf7d0;
  font-size: 1rem;
}

.logo-text {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  color: var(--text-main);
}

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

/* NAV */

.main-nav {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* Top-level links and dropdown triggers */
.main-nav .nav-link,
.main-nav > a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.92rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: 0.18s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.main-nav .nav-link i {
  font-size: 0.7rem;
}

/* Hover on main nav items */
.main-nav .nav-link:hover,
.main-nav > a:hover {
  color: var(--text-main);
  border-color: rgba(148, 163, 184, 0.5);
  background: radial-gradient(
    circle at top left,
    rgba(34, 197, 94, 0.24),
    transparent
  );
}

/* Dropdown container */
.dropdown {
  position: relative;
}

/* Dropdown menu panel (desktop default: hidden, absolute) */
.dropdown-menu {
  position: absolute;
  margin-top: -4px;
  top: calc(100% + 0.4rem);
  left: 0;
  min-width: 210px;
  padding: 0.4rem;
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.6);
  background: radial-gradient(
    circle at top left,
    rgba(15, 23, 42, 0.98),
    rgba(15, 23, 42, 0.96)
  );
  box-shadow: 0 18px 45px rgba(15, 23, 42, 0.95);
  display: none;
  z-index: 30;
}

/* Links inside dropdown */
.dropdown-menu a {
  display: block;
  margin: 0;
  padding: 0.45rem 0.65rem;
  border-radius: 0.7rem;
  font-size: 0.88rem;
  color: var(--text-muted);
  border: none;
  text-decoration: none;
}

.dropdown-menu a:hover {
  color: var(--text-main);
  background: radial-gradient(
    circle at top left,
    rgba(34, 197, 94, 0.2),
    rgba(15, 23, 42, 1)
  );
}

/* Show dropdown on hover (desktop only) */
@media (min-width: 768px) {
  .dropdown:hover .dropdown-menu {
    display: block;
  }
  
}

/* Mobile menu button (hamburger) */

.menu-toggle {
  display: none;
  border: none;
  background: transparent;
  font-size: 1.25rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 999px;
  transition: 0.15s ease;
}

.menu-toggle:hover {
  background: rgba(15, 23, 42, 0.9);
  color: var(--text-main);
}



/* Mobile menu button (hamburger) */

.menu-toggle {
  display: none;
  border: none;
  background: transparent;
  font-size: 1.25rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 999px;
  transition: 0.15s ease;
}

.menu-toggle:hover {
  background: rgba(15, 23, 42, 0.9);
  color: var(--text-main);
}

/* ============= REST OF SITE ============= */

/* Buttons */

.btn {
  border: none;
  cursor: pointer;
  padding: 0.55rem 1.15rem;
  font-size: 0.9rem;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--primary);
  color: #e5e7eb;
  box-shadow: 0 12px 30px rgba(34, 197, 94, 0.52);
  text-decoration: none;
  transition: 0.15s ease;
}

.btn.secondary {
  background: rgba(15, 23, 42, 0.95);
  border: 1px solid rgba(148, 163, 184, 0.6);
  box-shadow: none;
}

.btn:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

.btn.secondary:hover {
  border-color: rgba(56, 189, 248, 0.8);
}

/* Hero */

.hero {
  padding: 2.5rem 0 2rem;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1.2fr);
  gap: 1.6rem;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.78rem;
  padding: 0.25rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(56, 189, 248, 0.6);
  color: #7dd3fc;
  background: radial-gradient(circle at top left, rgba(15, 23, 42, 0.95), transparent);
}

.hero-badge i {
  color: var(--primary);
}

.hero h1 {
  font-size: clamp(2.1rem, 4.5vw, 2.8rem);
  margin: 0.7rem 0 0.3rem;
}

.hero-subtitle {
  max-width: 32rem;
  color: var(--text-muted);
  font-size: 0.98rem;
}

.hero-actions {
  margin-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* Hero highlight card */

.hero-highlight {
  display: flex;
  justify-content: flex-end;
}

.hero-highlight-inner {
  width: 100%;
  max-width: 360px;
  border-radius: 22px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.22), rgba(15, 23, 42, 1));
  padding: 1.1rem 1.05rem;
  box-shadow: var(--shadow-soft);
}

.hero-highlight-title {
  font-size: 0.8rem;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 0.1rem;
}

.hero-highlight-main {
  margin: 0 0 0.7rem;
  font-size: 0.95rem;
}

.hero-highlight-stats {
  display: flex;
  gap: 0.8rem;
  margin-bottom: 0.6rem;
}

.hero-highlight-stats div span {
  display: block;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.hero-highlight-stats div strong {
  font-size: 0.95rem;
}

.hero-highlight-stats div:nth-child(3) strong {
  color: #4ade80;
}

.hero-mini-note {
  margin: 0;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* Sections */

.tools-section {
  padding: 1.6rem 0 2.6rem;
}

.section-header {
  margin-bottom: 0.9rem;
}

.section-header h2 {
  font-size: 1.3rem;
  margin: 0 0 0.2rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.section-header h2 i {
  color: var(--primary);
}

.section-header p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Tools grid */

.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.1rem;
}

.tool-card {
  text-decoration: none;
  background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.2), rgba(15, 23, 42, 1));
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-soft);
  padding: 1.1rem 1.15rem;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  transform: translateY(0);
  transition: 0.18s ease;
}

.tool-card i {
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: 0.15rem;
}

.tool-card h3 {
  margin: 0;
  font-size: 1.02rem;
  color: var(--text-main);
}

.tool-card p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: rgba(34, 197, 94, 0.8);
  background: radial-gradient(circle at top, rgba(34, 197, 94, 0.3), rgba(15, 23, 42, 1));
}

/* Tool page */

.tool-hero {
  padding: 2.3rem 0 1.1rem;
}

.tool-hero h1 {
  font-size: clamp(2rem, 4.3vw, 2.5rem);
  margin-bottom: 0.3rem;
}

.tool-subtitle {
  color: var(--text-muted);
  max-width: 36rem;
}

.back-link a {
  font-size: 0.9rem;
  color: var(--text-muted);
  text-decoration: none;
}

.back-link a:hover {
  color: var(--text-main);
}

.tool-main-section {
  padding: 0.8rem 0 2.7rem;
}

.tool-container {
  background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.18), rgba(15, 23, 42, 1));
  border-radius: 22px;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-soft);
  padding: 1.5rem 1.3rem;
}

/* Form elements */

label {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.9rem;
}

textarea,
input {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border-radius: 10px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: rgba(15, 23, 42, 0.9);
  color: var(--text-main);
  font-size: 0.94rem;
  font-family: inherit;
  outline: none;
  resize: vertical;
  min-height: 44px;
}

textarea:focus,
input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 1px rgba(34, 197, 94, 0.8);
}

/* Layout helpers */

.tool-row {
  display: grid;
  gap: 1rem;
}

.tool-row-2 {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.tool-actions {
  margin: 0.7rem 0 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* Info blocks */

.stats-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.stat-pill {
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(148, 163, 184, 0.7);
  font-size: 0.85rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.output-box {
  margin-top: 0.8rem;
  padding: 0.75rem 0.8rem;
  border-radius: 12px;
  border: 1px dashed rgba(148, 163, 184, 0.7);
  font-size: 1rem;
  background: rgba(15, 23, 42, 0.98);
  color: var(--text-main);
  overflow-x: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60px;
  flex-direction: column;
  gap: 0.6rem;
}

/* Chart wrapper */

.chart-wrapper {
  margin-top: 1.3rem;
  padding: 1.1rem 1rem 1.2rem;
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.4);
  background: radial-gradient(circle at top, rgba(34, 197, 94, 0.18), rgba(15, 23, 42, 1));
  box-shadow: 0 16px 38px rgba(15, 23, 42, 0.9);
}

.chart-title {
  margin: 0 0 0.6rem;
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.chart-title i {
  color: var(--primary);
}

/* Footer */

.site-footer {
  border-top: 1px solid rgba(31, 41, 55, 1);
  padding: 1.1rem 0 1.4rem;
  background: linear-gradient(to top, #020617, transparent);
  margin-top: 0.6rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  margin-left: 0.8rem;
  font-size: 0.86rem;
}

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

/* Utilities */

.small-text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.mt-1 {
  margin-top: 0.7rem;
}

/* Page cards (about, contact, policy) */

.page-section {
  padding: 2.2rem 0 2.7rem;
}

.page-card {
  background: radial-gradient(circle at top left, rgba(34, 197, 94, 0.15), rgba(15, 23, 42, 1));
  border-radius: 22px;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-soft);
  padding: 1.5rem 1.4rem;
}

.page-card h1 {
  margin-top: 0;
  margin-bottom: 0.4rem;
}

.page-card h2 {
  margin-top: 1.2rem;
  font-size: 1.08rem;
}

.page-card p,
.page-card li {
  font-size: 0.95rem;
  color: var(--text-muted);
}

.page-card ul {
  padding-left: 1.2rem;
}

.volume-block {
  margin-top: 1rem;
  padding: 0.9rem 0.85rem;
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.5);
  background: radial-gradient(circle at top left, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.9));
}

.volume-block h3 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1rem;
}

/* ================== RESPONSIVE ================== */

@media (max-width: 768px) {
  
  .header-inner {
    padding: 0.75rem 0;
    gap: 0.5rem;
    flex-wrap: wrap;           /* allow nav to go to next line */
    align-items: flex-start;
  }

  /* Logo on left, burger on right in first row */
  .logo {
    flex: 1 1 auto;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 0.5rem;
  }

  /* Nav becomes full-width vertical below logo+burger */
  .main-nav {
    order: 3;
    display: none;             /* hidden until .open */
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    margin-top: 0.4rem;
    padding-top: 0.5rem;
    border-top: 1px solid rgba(148, 163, 184, 0.4);
    gap: 0.3rem;
  }

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

  .main-nav .nav-link,
  .main-nav > a {
    width: 100%;
    justify-content: space-between;
    border-radius: 0.8rem;
    padding: 0.5rem 0.75rem;
  }

  .dropdown {
    width: 100%;
  }

  /* Dropdown menus inline under their trigger on mobile */
  .dropdown-menu {
    position: static;
    margin-top: 0.2rem;
    width: 100%;
    box-shadow: none;
    border-radius: 0.75rem;
    background: radial-gradient(
      circle at top left,
      rgba(15, 23, 42, 0.95),
      rgba(15, 23, 42, 0.9)
    );
    display: none;
  }

  .dropdown.open .dropdown-menu {
    display: block;
  }

  /* Hero stack on mobile */
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-highlight {
    justify-content: flex-start;
  }

  /* (rest of your mobile hero styles can stay as they are) */
/* } */
}