/* ==========================================================================
   DonumNexus Landing Page — Complete Stylesheet
   AI Grant Writing Platform for Nonprofits

   Fonts: Syne (display/headings), DM Sans (body)
   Load in HTML:
   <link href="https://fonts.googleapis.com/css2?family=Syne:wght@400;500;600;700;800&family=DM+Sans:ital,opsz,wght@0,9..40,100..1000;1,9..40,100..1000&display=swap" rel="stylesheet">
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties
   -------------------------------------------------------------------------- */
:root {
  /* Brand palette */
  --color-teal:        #00C9A7;
  --color-blue:        #2D7DD2;
  --color-purple:      #6C63FF;
  --color-teal-dim:    #00C9A720;
  --color-blue-dim:    #2D7DD220;
  --color-purple-dim:  #6C63FF20;
  --color-teal-glow:   #00C9A740;
  --color-blue-glow:   #2D7DD240;
  --color-purple-glow: #6C63FF40;

  /* Surfaces */
  --bg-primary:        #0a0f1a;
  --bg-secondary:      #0e1425;
  --bg-tertiary:       #131a2e;
  --bg-card:           rgba(17, 24, 43, 0.65);
  --bg-card-hover:     rgba(22, 31, 55, 0.8);
  --bg-glass:          rgba(14, 20, 38, 0.6);
  --bg-glass-heavy:    rgba(14, 20, 38, 0.85);
  --bg-input:          rgba(20, 28, 50, 0.7);

  /* Borders */
  --border-subtle:     rgba(255, 255, 255, 0.06);
  --border-medium:     rgba(255, 255, 255, 0.1);
  --border-glow:       rgba(0, 201, 167, 0.25);

  /* Text */
  --text-primary:      #f0f2f8;
  --text-secondary:    #a0a8c0;
  --text-tertiary:     #6b7394;
  --text-inverse:      #0a0f1a;

  /* Typography */
  --font-display:      'Syne', Georgia, 'Times New Roman', serif;
  --font-body:         'DM Sans', 'General Sans', Satoshi, Cambria, serif;
  --font-mono:         'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* Spacing scale (8px base) */
  --space-1:  0.25rem;  /* 4px */
  --space-2:  0.5rem;   /* 8px */
  --space-3:  0.75rem;  /* 12px */
  --space-4:  1rem;     /* 16px */
  --space-5:  1.5rem;   /* 24px */
  --space-6:  2rem;     /* 32px */
  --space-7:  2.5rem;   /* 40px */
  --space-8:  3rem;     /* 48px */
  --space-9:  4rem;     /* 64px */
  --space-10: 5rem;     /* 80px */
  --space-11: 6rem;     /* 96px */
  --space-12: 8rem;     /* 128px */

  /* Radii */
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   16px;
  --radius-xl:   24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm:    0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md:    0 4px 12px rgba(0, 0, 0, 0.35), 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-lg:    0 8px 30px rgba(0, 0, 0, 0.4), 0 4px 8px rgba(0, 0, 0, 0.25);
  --shadow-xl:    0 16px 50px rgba(0, 0, 0, 0.5), 0 8px 16px rgba(0, 0, 0, 0.3);
  --shadow-glow:  0 0 30px var(--color-teal-glow), 0 0 60px var(--color-purple-dim);
  --shadow-glow-sm: 0 0 15px var(--color-teal-glow);

  /* Transitions */
  --ease-out-expo:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-back:  cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-spring:    cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --duration-fast:  150ms;
  --duration-base:  250ms;
  --duration-slow:  400ms;
  --duration-glacial: 800ms;

  /* Layout */
  --container-max:   1200px;
  --container-narrow: 800px;
  --nav-height:      72px;
}


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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
  min-height: 100vh;
}

/* Dot-grid pattern overlay for depth */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(
    circle at 1px 1px,
    rgba(255, 255, 255, 0.025) 1px,
    transparent 1px
  );
  background-size: 32px 32px;
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    ellipse at 30% 20%,
    rgba(0, 201, 167, 0.04) 0%,
    transparent 50%
  ),
  radial-gradient(
    ellipse at 70% 60%,
    rgba(108, 99, 255, 0.04) 0%,
    transparent 50%
  );
  pointer-events: none;
  z-index: 0;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-teal);
  text-decoration: none;
  transition: color var(--duration-fast) ease;
}

a:hover {
  color: var(--color-blue);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.2rem, 6vw, 4.2rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 4vw, 3rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.75rem); }
h4 { font-size: clamp(1.1rem, 2vw, 1.35rem); }

p {
  color: var(--text-secondary);
  max-width: 65ch;
}

::selection {
  background: var(--color-teal);
  color: var(--text-inverse);
}

ul, ol {
  list-style: none;
}

button, input, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
  color: inherit;
}

button {
  cursor: pointer;
}


/* --------------------------------------------------------------------------
   Layout Utilities
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.container--narrow {
  max-width: var(--container-narrow);
}

section {
  position: relative;
  z-index: 1;
  padding-block: var(--space-10);
}

.section-label {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-teal);
  margin-bottom: var(--space-3);
  display: inline-block;
}

.section-heading {
  margin-bottom: var(--space-5);
}

.section-subtitle {
  font-size: 1.125rem;
  max-width: 55ch;
  margin-bottom: var(--space-8);
}

.text-center {
  text-align: center;
}

.text-center p,
.text-center .section-subtitle {
  margin-inline: auto;
}


/* --------------------------------------------------------------------------
   Gradient text effect — the signature brand element
   -------------------------------------------------------------------------- */
.gradient-text {
  background: linear-gradient(135deg, var(--color-teal), var(--color-blue), var(--color-purple));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  background-size: 200% 200%;
  animation: gradient-shift 6s ease infinite;
}

@keyframes gradient-shift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Shimmer variant for CTA elements */
.gradient-shimmer {
  position: relative;
  overflow: hidden;
}

.gradient-shimmer::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.08),
    transparent
  );
  animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
  0%   { left: -100%; }
  100% { left: 200%; }
}


/* --------------------------------------------------------------------------
   3. Navigation Bar
   -------------------------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: var(--bg-glass-heavy);
  backdrop-filter: blur(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--duration-slow) ease,
              box-shadow var(--duration-slow) ease;
}

.nav--scrolled {
  background: var(--bg-glass-heavy);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
  border-bottom-color: var(--border-medium);
}

.nav__inner {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav__brand {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--color-teal), var(--color-blue), var(--color-purple));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-decoration: none;
  transition: opacity var(--duration-fast) ease;
}

.nav__brand:hover {
  opacity: 0.85;
}

.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-6);
}

.nav__link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  position: relative;
  padding-block: var(--space-1);
  transition: color var(--duration-fast) ease;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-teal), var(--color-blue));
  border-radius: 1px;
  transition: width var(--duration-base) var(--ease-out-expo);
}

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

.nav__link:hover::after {
  width: 100%;
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__login {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  transition: color var(--duration-fast) ease;
}

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

/* Mobile hamburger */
.nav__toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  width: 28px;
  padding: var(--space-1);
  background: none;
  border: none;
  cursor: pointer;
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: transform var(--duration-base) ease,
              opacity var(--duration-fast) ease;
}

.nav__toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav__toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav menu */
.nav__mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-glass-heavy);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  padding: var(--space-8) var(--space-5);
  flex-direction: column;
  gap: var(--space-5);
  z-index: 999;
}

.nav__mobile-menu.active {
  display: flex;
}

.nav__mobile-menu .nav__link {
  font-size: 1.25rem;
  color: var(--text-primary);
}


/* --------------------------------------------------------------------------
   4. Hero Section
   -------------------------------------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: calc(var(--nav-height) + var(--space-9));
  padding-bottom: var(--space-9);
  position: relative;
  overflow: hidden;
}

/* Ambient glow behind hero */
.hero::before {
  content: '';
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(
    ellipse,
    rgba(0, 201, 167, 0.1) 0%,
    rgba(45, 125, 210, 0.06) 40%,
    transparent 70%
  );
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.hero__content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 860px;
  margin-inline: auto;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-teal);
  background: var(--color-teal-dim);
  border: 1px solid rgba(0, 201, 167, 0.15);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
}

.hero__badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-teal);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.5; transform: scale(1.5); }
}

.hero__headline {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.08;
  margin-bottom: var(--space-5);
}

.hero__subtitle {
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--text-secondary);
  line-height: 1.65;
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
}

/* Email capture form */
.hero__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 480px;
  margin-inline: auto;
  margin-bottom: var(--space-6);
}

.hero__form-row {
  display: flex;
  gap: var(--space-3);
  flex-direction: column;
}

.hero__form-note {
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

/* Scroll indicator */
.hero__scroll-indicator {
  position: absolute;
  bottom: var(--space-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  color: var(--text-tertiary);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  animation: float-down 2.5s ease-in-out infinite;
}

.hero__scroll-indicator::after {
  content: '';
  width: 1px;
  height: 32px;
  background: linear-gradient(to bottom, var(--color-teal), transparent);
}

@keyframes float-down {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(8px); }
}


/* --------------------------------------------------------------------------
   Shared Form Elements
   -------------------------------------------------------------------------- */
.form-input {
  width: 100%;
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-primary);
  background: var(--bg-input);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  transition: border-color var(--duration-base) ease,
              box-shadow var(--duration-base) ease,
              background var(--duration-base) ease;
}

.form-input::placeholder {
  color: var(--text-tertiary);
}

.form-input:focus {
  border-color: var(--color-teal);
  box-shadow: 0 0 0 3px var(--color-teal-dim), var(--shadow-glow-sm);
  background: rgba(20, 28, 50, 0.9);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-lg);
  transition: transform var(--duration-base) var(--ease-spring),
              box-shadow var(--duration-base) ease,
              background var(--duration-base) ease,
              opacity var(--duration-fast) ease;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn:active {
  transform: scale(0.97);
}

.btn--primary {
  color: var(--text-inverse);
  background: linear-gradient(135deg, var(--color-teal), var(--color-blue));
  box-shadow: 0 4px 15px rgba(0, 201, 167, 0.3);
}

.btn--primary:hover {
  box-shadow: 0 6px 25px rgba(0, 201, 167, 0.4), 0 0 40px rgba(0, 201, 167, 0.15);
  transform: translateY(-1px);
}

.btn--primary::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.15),
    transparent
  );
  transition: left 0.6s ease;
}

.btn--primary:hover::after {
  left: 200%;
}

.btn--secondary {
  color: var(--text-primary);
  background: transparent;
  border: 1px solid var(--border-medium);
}

.btn--secondary:hover {
  border-color: var(--color-teal);
  background: var(--color-teal-dim);
  box-shadow: var(--shadow-glow-sm);
}

.btn--large {
  font-size: 1rem;
  padding: var(--space-4) var(--space-7);
  border-radius: var(--radius-lg);
}

.btn--full {
  width: 100%;
}


/* --------------------------------------------------------------------------
   5. Problem Section
   -------------------------------------------------------------------------- */
.problem {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.problem__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  margin-top: var(--space-7);
}

.problem__stat {
  padding: var(--space-6);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: transform var(--duration-base) var(--ease-spring),
              border-color var(--duration-base) ease,
              box-shadow var(--duration-base) ease;
}

.problem__stat:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow-sm);
}

.problem__stat-number {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--color-teal), var(--color-blue));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--space-2);
}

.problem__stat-label {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}


/* --------------------------------------------------------------------------
   6. Solution Section
   -------------------------------------------------------------------------- */
.solution {
  position: relative;
}

/* Ambient glow */
.solution::before {
  content: '';
  position: absolute;
  top: 50%;
  right: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(
    circle,
    rgba(108, 99, 255, 0.06) 0%,
    transparent 70%
  );
  filter: blur(60px);
  pointer-events: none;
}

.solution__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  margin-top: var(--space-7);
}

.solution__card {
  padding: var(--space-6);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
  transition: transform var(--duration-base) var(--ease-spring),
              border-color var(--duration-base) ease,
              box-shadow var(--duration-base) ease;
}

.solution__card:hover {
  transform: translateY(-4px);
  border-color: var(--border-glow);
  box-shadow: 0 8px 30px rgba(0, 201, 167, 0.08);
}

/* Top accent line on cards */
.solution__card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-teal), var(--color-blue), var(--color-purple));
  opacity: 0;
  transition: opacity var(--duration-base) ease;
}

.solution__card:hover::before {
  opacity: 1;
}

.solution__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  border-radius: var(--radius-md);
  background: var(--color-teal-dim);
  border: 1px solid rgba(0, 201, 167, 0.12);
  margin-bottom: var(--space-4);
  transition: transform var(--duration-base) var(--ease-spring),
              box-shadow var(--duration-base) ease;
}

.solution__card:hover .solution__icon {
  transform: scale(1.08);
  box-shadow: 0 0 20px var(--color-teal-glow);
}

.solution__card h3 {
  margin-bottom: var(--space-3);
}

.solution__card p {
  font-size: 0.95rem;
  line-height: 1.65;
}


/* --------------------------------------------------------------------------
   7. How It Works Section
   -------------------------------------------------------------------------- */
.how-it-works {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  overflow: hidden;
}

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
  margin-top: var(--space-8);
  position: relative;
}

/* Vertical connecting line (mobile) */
.steps::before {
  content: '';
  position: absolute;
  top: 40px;
  bottom: 40px;
  left: 27px;
  width: 2px;
  background: linear-gradient(
    to bottom,
    var(--color-teal),
    var(--color-blue),
    var(--color-purple)
  );
  opacity: 0.3;
}

.step {
  display: flex;
  gap: var(--space-5);
  align-items: flex-start;
  position: relative;
}

.step__number {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--color-teal);
  background: var(--bg-primary);
  border: 2px solid rgba(0, 201, 167, 0.3);
  border-radius: 50%;
  position: relative;
  z-index: 2;
  transition: border-color var(--duration-base) ease,
              box-shadow var(--duration-base) ease,
              transform var(--duration-base) var(--ease-spring);
}

.step:hover .step__number {
  border-color: var(--color-teal);
  box-shadow: 0 0 25px var(--color-teal-glow);
  transform: scale(1.1);
}

.step__content h3 {
  margin-bottom: var(--space-2);
}

.step__content p {
  font-size: 0.95rem;
  line-height: 1.65;
}


/* --------------------------------------------------------------------------
   8. Pricing Section
   -------------------------------------------------------------------------- */
.pricing {
  position: relative;
}

/* Ambient glow behind pricing */
.pricing::before {
  content: '';
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(
    ellipse,
    rgba(108, 99, 255, 0.05) 0%,
    rgba(45, 125, 210, 0.03) 40%,
    transparent 70%
  );
  filter: blur(80px);
  pointer-events: none;
}

.pricing__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.pricing__toggle-switch {
  width: 48px;
  height: 26px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-full);
  cursor: pointer;
  position: relative;
  transition: background var(--duration-base) ease,
              border-color var(--duration-base) ease;
}

.pricing__toggle-switch::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  background: var(--color-teal);
  border-radius: 50%;
  transition: transform var(--duration-base) var(--ease-spring);
}

.pricing__toggle-switch.active {
  background: var(--color-teal-dim);
  border-color: var(--color-teal);
}

.pricing__toggle-switch.active::after {
  transform: translateX(22px);
}

.pricing__save-badge {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-teal);
  background: var(--color-teal-dim);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.pricing__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  position: relative;
  z-index: 1;
}

/* ---------- Individual pricing card ---------- */
.pricing-card {
  padding: var(--space-7);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  transition: transform var(--duration-slow) var(--ease-spring),
              border-color var(--duration-base) ease,
              box-shadow var(--duration-slow) ease;
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

/* Featured tier (Pro) */
.pricing-card--featured {
  background: rgba(22, 31, 58, 0.8);
  border-color: rgba(0, 201, 167, 0.3);
  box-shadow: 0 0 40px rgba(0, 201, 167, 0.08),
              0 8px 30px rgba(0, 0, 0, 0.3);
}

.pricing-card--featured::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg,
    rgba(0, 201, 167, 0.3),
    rgba(45, 125, 210, 0.15),
    rgba(108, 99, 255, 0.3)
  );
  z-index: -1;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: xor;
  padding: 1px;
}

.pricing-card--featured:hover {
  border-color: rgba(0, 201, 167, 0.5);
  box-shadow: 0 0 60px rgba(0, 201, 167, 0.12),
              0 16px 50px rgba(0, 0, 0, 0.35);
}

.pricing-card__badge {
  position: absolute;
  top: calc(-1 * var(--space-3));
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-inverse);
  background: linear-gradient(135deg, var(--color-teal), var(--color-blue));
  padding: var(--space-1) var(--space-4);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.pricing-card__name {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
}

.pricing-card__description {
  font-size: 0.88rem;
  color: var(--text-tertiary);
  margin-bottom: var(--space-5);
  min-height: 2.5em;
}

.pricing-card__price {
  display: flex;
  align-items: baseline;
  gap: var(--space-1);
  margin-bottom: var(--space-5);
}

.pricing-card__currency {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.pricing-card__amount {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  line-height: 1;
}

.pricing-card--featured .pricing-card__amount {
  background: linear-gradient(135deg, var(--color-teal), var(--color-blue));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.pricing-card__period {
  font-size: 0.88rem;
  color: var(--text-tertiary);
}

.pricing-card__divider {
  border: none;
  height: 1px;
  background: var(--border-subtle);
  margin-bottom: var(--space-5);
}

.pricing-card__features {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.pricing-card__feature {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.pricing-card__feature::before {
  content: '';
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 2px;
  border-radius: 50%;
  background: var(--color-teal-dim);
  border: 1px solid rgba(0, 201, 167, 0.2);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='8' viewBox='0 0 10 8'%3E%3Cpath d='M1 4l2.5 2.5L9 1' stroke='%2300C9A7' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

.pricing-card__feature--disabled {
  color: var(--text-tertiary);
  opacity: 0.5;
}

.pricing-card__feature--disabled::before {
  background-image: none;
  background-color: rgba(255, 255, 255, 0.04);
  border-color: rgba(255, 255, 255, 0.06);
}

.pricing-card__cta {
  width: 100%;
}


/* --------------------------------------------------------------------------
   9. Stats / Social Proof Section
   -------------------------------------------------------------------------- */
.social-proof {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}

.social-proof__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  margin-top: var(--space-7);
}

.social-proof__stat {
  text-align: center;
  padding: var(--space-5);
}

.social-proof__stat-value {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--color-teal), var(--color-purple));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--space-2);
}

.social-proof__stat-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* Testimonials / quotes */
.social-proof__testimonials {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
  margin-top: var(--space-8);
}

.testimonial {
  padding: var(--space-6);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  position: relative;
  transition: transform var(--duration-base) var(--ease-spring),
              border-color var(--duration-base) ease;
}

.testimonial:hover {
  transform: translateY(-3px);
  border-color: var(--border-glow);
}

.testimonial__quote {
  font-size: 1rem;
  font-style: italic;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--space-4);
  position: relative;
  padding-left: var(--space-5);
}

.testimonial__quote::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  border-radius: 2px;
  background: linear-gradient(to bottom, var(--color-teal), var(--color-purple));
}

.testimonial__author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.testimonial__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-teal-dim), var(--color-purple-dim));
  border: 1px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-teal);
}

.testimonial__name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

.testimonial__role {
  font-size: 0.78rem;
  color: var(--text-tertiary);
}

/* Logo row */
.social-proof__logos {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-7);
  margin-top: var(--space-8);
  padding-top: var(--space-7);
  border-top: 1px solid var(--border-subtle);
}

.social-proof__logo {
  opacity: 0.35;
  filter: grayscale(1) brightness(2);
  transition: opacity var(--duration-base) ease,
              filter var(--duration-base) ease;
  max-height: 28px;
}

.social-proof__logo:hover {
  opacity: 0.7;
  filter: grayscale(0) brightness(1);
}


/* --------------------------------------------------------------------------
   10. Final CTA Section
   -------------------------------------------------------------------------- */
.final-cta {
  position: relative;
  padding-block: var(--space-12);
  text-align: center;
  overflow: hidden;
}

.final-cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(
    circle,
    rgba(0, 201, 167, 0.08) 0%,
    rgba(45, 125, 210, 0.04) 40%,
    transparent 70%
  );
  filter: blur(60px);
  pointer-events: none;
}

.final-cta__content {
  position: relative;
  z-index: 1;
  max-width: 650px;
  margin-inline: auto;
}

.final-cta__heading {
  margin-bottom: var(--space-4);
}

.final-cta__subtitle {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-inline: auto;
  margin-bottom: var(--space-7);
}

.final-cta__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 480px;
  margin-inline: auto;
  margin-bottom: var(--space-4);
}

.final-cta__form-row {
  display: flex;
  gap: var(--space-3);
  flex-direction: column;
}

.final-cta__form-note {
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

/* Decorative border frame around CTA */
.final-cta__frame {
  position: absolute;
  inset: var(--space-6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  pointer-events: none;
}


/* --------------------------------------------------------------------------
   11. Footer
   -------------------------------------------------------------------------- */
.footer {
  position: relative;
  z-index: 1;
  padding-block: var(--space-9) var(--space-6);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-7);
  margin-bottom: var(--space-8);
}

.footer__brand {
  max-width: 320px;
}

.footer__brand-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-teal), var(--color-blue), var(--color-purple));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: var(--space-3);
}

.footer__brand-description {
  font-size: 0.88rem;
  color: var(--text-tertiary);
  line-height: 1.65;
}

.footer__column-title {
  font-family: var(--font-display);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: var(--space-4);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__link {
  font-size: 0.88rem;
  color: var(--text-tertiary);
  transition: color var(--duration-fast) ease,
              padding-left var(--duration-base) var(--ease-out-expo);
}

.footer__link:hover {
  color: var(--color-teal);
  padding-left: var(--space-2);
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.footer__bottom-links {
  display: flex;
  gap: var(--space-5);
}

.footer__bottom-link {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  transition: color var(--duration-fast) ease;
}

.footer__bottom-link:hover {
  color: var(--text-secondary);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
}

.footer__social-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-tertiary);
  font-size: 0.9rem;
  transition: color var(--duration-fast) ease,
              background var(--duration-base) ease,
              border-color var(--duration-base) ease,
              transform var(--duration-base) var(--ease-spring);
}

.footer__social-icon:hover {
  color: var(--color-teal);
  background: var(--color-teal-dim);
  border-color: rgba(0, 201, 167, 0.2);
  transform: translateY(-2px);
}


/* --------------------------------------------------------------------------
   13. Animations — Scroll Reveal
   -------------------------------------------------------------------------- */

/* Elements start hidden and animate in via JS (IntersectionObserver) */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-glacial) var(--ease-out-expo),
              transform var(--duration-glacial) var(--ease-out-expo);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms var(--ease-out-expo),
              transform 600ms var(--ease-out-expo);
}

.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger.visible > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger.visible > *:nth-child(6) { transition-delay: 400ms; }

.reveal-stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* Scale-in variant */
.reveal-scale {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity var(--duration-glacial) var(--ease-out-expo),
              transform var(--duration-glacial) var(--ease-out-expo);
}

.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* Fade in from sides */
.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity var(--duration-glacial) var(--ease-out-expo),
              transform var(--duration-glacial) var(--ease-out-expo);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity var(--duration-glacial) var(--ease-out-expo),
              transform var(--duration-glacial) var(--ease-out-expo);
}

.reveal-left.visible,
.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Gradient border animation for featured elements */
@keyframes rotate-gradient {
  0%   { --gradient-angle: 0deg; }
  100% { --gradient-angle: 360deg; }
}

/* Floating animation for decorative elements */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-12px); }
}

.float {
  animation: float 4s ease-in-out infinite;
}

/* Glow pulse for emphasis */
@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 20px var(--color-teal-glow); }
  50%      { box-shadow: 0 0 40px var(--color-teal-glow), 0 0 60px var(--color-purple-dim); }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal,
  .reveal-scale,
  .reveal-left,
  .reveal-right {
    opacity: 1;
    transform: none;
  }

  .reveal-stagger > * {
    opacity: 1;
    transform: none;
  }
}


/* --------------------------------------------------------------------------
   12. Responsive Breakpoints (mobile-first)
   -------------------------------------------------------------------------- */

/* ------ Tablet (768px) ------ */
@media (min-width: 768px) {
  section {
    padding-block: var(--space-11);
  }

  /* Nav */
  .nav__toggle {
    display: none;
  }

  .nav__links {
    display: flex;
  }

  /* Hero form row */
  .hero__form-row {
    flex-direction: row;
  }

  .hero__form-row .form-input {
    flex: 1;
  }

  /* Problem grid */
  .problem__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Solution grid */
  .solution__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Steps: still vertical but breathing room */
  .steps {
    gap: var(--space-6);
    max-width: 600px;
    margin-inline: auto;
  }

  /* Pricing grid */
  .pricing__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Social proof */
  .social-proof__stats {
    grid-template-columns: repeat(3, 1fr);
  }

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

  /* Final CTA form */
  .final-cta__form-row {
    flex-direction: row;
  }

  .final-cta__form-row .form-input {
    flex: 1;
  }

  /* Footer */
  .footer__grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }

  .footer__bottom {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}


/* ------ Desktop (1024px) ------ */
@media (min-width: 1024px) {
  section {
    padding-block: var(--space-12);
  }

  .container {
    padding-inline: var(--space-8);
  }

  /* Hero */
  .hero {
    min-height: 100vh;
  }

  .hero__headline {
    font-size: clamp(3rem, 5.5vw, 4.5rem);
  }

  /* Problem grid */
  .problem__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  /* Solution grid */
  .solution__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Steps: horizontal flow */
  .steps {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-5);
    max-width: 100%;
  }

  /* Connecting line horizontal */
  .steps::before {
    top: 27px;
    bottom: auto;
    left: calc(28px + var(--space-5));
    right: calc(28px + var(--space-5));
    width: auto;
    height: 2px;
  }

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

  /* Pricing grid */
  .pricing__grid {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-4);
  }

  /* Featured card stands taller */
  .pricing-card--featured {
    transform: scale(1.04);
    z-index: 2;
  }

  .pricing-card--featured:hover {
    transform: scale(1.04) translateY(-6px);
  }

  /* Social proof */
  .social-proof__testimonials {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Footer */
  .footer__grid {
    grid-template-columns: 1.8fr 1fr 1fr 1fr;
  }
}


/* ------ Large Desktop (1280px) ------ */
@media (min-width: 1280px) {
  :root {
    --container-max: 1280px;
  }

  .pricing__grid {
    gap: var(--space-5);
  }
}


/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

.no-scroll {
  overflow: hidden;
}

/* Horizontal divider with gradient */
.divider {
  border: none;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--border-medium),
    transparent
  );
  margin-block: var(--space-8);
}

/* Glow decoration that can be placed absolutely */
.glow-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}

.glow-orb--teal {
  background: rgba(0, 201, 167, 0.08);
}

.glow-orb--blue {
  background: rgba(45, 125, 210, 0.08);
}

.glow-orb--purple {
  background: rgba(108, 99, 255, 0.08);
}

/* Chip / tag element */
.chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid;
}

.chip--teal {
  color: var(--color-teal);
  background: var(--color-teal-dim);
  border-color: rgba(0, 201, 167, 0.15);
}

.chip--blue {
  color: var(--color-blue);
  background: var(--color-blue-dim);
  border-color: rgba(45, 125, 210, 0.15);
}

.chip--purple {
  color: var(--color-purple);
  background: var(--color-purple-dim);
  border-color: rgba(108, 99, 255, 0.15);
}