/* ============================================
   SILVER SINGLES CANADA - Main Stylesheet
   Premium Senior Dating Resource
   ============================================ */

/* --- CSS Custom Properties (Design Tokens) --- */
:root {
  --midnight-navy: #001233;
  --abyssal: #000A1A;
  --royal-blue: #0466C8;
  --royal-blue-hover: #0578E8;
  --ice-blue: #C6D8FF;
  --pure-white: #FFFFFF;
  --error-red: #E04646;
  --success-green: #2E9D5A;
  --glass-bg: rgba(198, 216, 255, 0.08);
  --glass-border: rgba(198, 216, 255, 0.15);
  --glass-bg-hover: rgba(198, 216, 255, 0.12);
  --glass-border-hover: rgba(198, 216, 255, 0.30);

  --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-pill: 9999px;

  --shadow-card: 0 8px 32px rgba(0, 10, 26, 0.25);
  --shadow-card-hover: 0 12px 40px rgba(0, 10, 26, 0.35);
  --shadow-image: 0 20px 60px rgba(0, 10, 26, 0.40);
  --shadow-glow: 0 4px 20px rgba(4, 102, 200, 0.35);
  --shadow-input-focus: 0 0 0 3px rgba(4, 102, 200, 0.20);

  --transition-fast: 0.2s ease;
  --transition-base: 0.25s ease;
  --transition-slow: 0.35s ease;
  --transition-slower: 0.4s ease;
}

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

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

body {
  font-family: var(--font-primary);
  font-weight: 400;
  line-height: 1.65;
  color: var(--ice-blue);
  background-color: var(--midnight-navy);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--royal-blue);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--royal-blue);
  outline-offset: 2px;
}

/* Skip to content link for accessibility */
.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--royal-blue);
  color: var(--pure-white);
  padding: 12px 24px;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-weight: 500;
  font-size: 0.9rem;
  z-index: 9999;
  transition: top var(--transition-base);
}

.skip-link:focus {
  top: 0;
}

/* --- Typography --- */
.display {
  font-size: clamp(3rem, 8vw, 7rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--pure-white);
}

h1, .h1 {
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--pure-white);
}

h2, .h2 {
  font-size: clamp(1.5rem, 3vw, 2.5rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--pure-white);
}

h3, .h3 {
  font-size: clamp(1.2rem, 2vw, 1.8rem);
  font-weight: 500;
  line-height: 1.25;
  color: var(--pure-white);
}

h4, .h4 {
  font-size: clamp(1.05rem, 1.5vw, 1.3rem);
  font-weight: 500;
  line-height: 1.3;
  color: var(--pure-white);
}

.body-large {
  font-size: clamp(1.1rem, 1.5vw, 1.35rem);
  font-weight: 400;
  line-height: 1.6;
  color: var(--ice-blue);
}

.caption {
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--royal-blue);
}

.text-white { color: var(--pure-white); }
.text-ice { color: var(--ice-blue); }
.text-royal { color: var(--royal-blue); }

/* --- Layout --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

@media (min-width: 768px) {
  .container {
    padding-left: 48px;
    padding-right: 48px;
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: 80px;
    padding-right: 80px;
  }
}

.section {
  padding-top: 100px;
  padding-bottom: 100px;
  position: relative;
}

@media (min-width: 768px) {
  .section {
    padding-top: 120px;
    padding-bottom: 120px;
  }
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 64px;
}

.section-header .caption {
  margin-bottom: 16px;
  display: inline-block;
}

.section-header h2 {
  margin-bottom: 20px;
}

.section-header p {
  opacity: 0.9;
}

/* Two column layouts */
.two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}

@media (min-width: 768px) {
  .two-col {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
  }

  .two-col-55-45 {
    grid-template-columns: 1.2fr 1fr;
  }

  .two-col-45-55 {
    grid-template-columns: 1fr 1.2fr;
  }

  .two-col-40-60 {
    grid-template-columns: 2fr 3fr;
  }
}

/* Three column grid */
.three-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .three-col {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .three-col {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* Four column grid */
.four-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 640px) {
  .four-col {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .four-col {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* Six column / 3x2 grid for cities */
.six-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 640px) {
  .six-col {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .six-col {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* --- Background Overlays --- */
.bg-overlay {
  position: relative;
}

.bg-overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.bg-overlay > * {
  position: relative;
  z-index: 1;
}

.bg-gradient-1::before {
  background: linear-gradient(180deg, rgba(0, 18, 51, 0.95) 0%, rgba(0, 18, 51, 0.88) 100%);
}

.bg-gradient-2::before {
  background: linear-gradient(180deg, rgba(0, 18, 51, 0.92) 0%, rgba(0, 18, 51, 0.85) 100%);
}

.bg-solid::before {
  background: rgba(0, 18, 51, 0.90);
}

.bg-solid-deep::before {
  background: rgba(0, 10, 26, 0.95);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-pill);
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--royal-blue);
  color: var(--pure-white);
}

.btn-primary:hover {
  background-color: var(--royal-blue-hover);
  transform: scale(1.02);
  box-shadow: var(--shadow-glow);
  color: var(--pure-white);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  background-color: transparent;
  color: var(--ice-blue);
  border: 1px solid var(--ice-blue);
}

.btn-secondary:hover {
  background-color: rgba(198, 216, 255, 0.12);
  border-color: var(--pure-white);
  color: var(--pure-white);
}

.btn-full {
  width: 100%;
}

.btn-sm {
  padding: 10px 24px;
  font-size: 0.9rem;
}

.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-primary);
  font-weight: 500;
  font-size: 1rem;
  color: var(--royal-blue);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  position: relative;
}

.btn-text::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--royal-blue);
  transition: width var(--transition-base);
}

.btn-text:hover::after {
  width: 100%;
}

.btn-text:hover {
  color: var(--royal-blue-hover);
}

/* --- Cards --- */
.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all var(--transition-slow);
}

.glass-card:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.testimonial-card {
  background: rgba(198, 216, 255, 0.06);
  border: 1px solid rgba(198, 216, 255, 0.12);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-slow);
}

.testimonial-card:hover {
  border-color: rgba(198, 216, 255, 0.25);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.testimonial-card .card-image {
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.testimonial-card .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slower);
}

.testimonial-card:hover .card-image img {
  transform: scale(1.05);
}

.testimonial-card .card-body {
  padding: 28px;
}

.testimonial-card .quote {
  font-style: italic;
  color: var(--pure-white);
  margin-bottom: 16px;
  line-height: 1.7;
}

.testimonial-card .attribution {
  color: var(--royal-blue);
  font-size: 0.85rem;
  font-weight: 500;
}

.city-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  cursor: pointer;
}

.city-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slower);
}

.city-card:hover img {
  transform: scale(1.05);
}

.city-card .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(transparent 40%, rgba(0, 10, 26, 0.85) 100%);
  transition: background var(--transition-slow);
}

.city-card:hover .overlay {
  background: linear-gradient(transparent 30%, rgba(0, 10, 26, 0.75) 100%);
}

.city-card .city-name {
  position: absolute;
  bottom: 0;
  left: 0;
  padding: 24px;
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--pure-white);
}

.blog-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-slow);
}

.blog-card:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}

.blog-card .card-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.blog-card .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slower);
}

.blog-card:hover .card-image img {
  transform: scale(1.05);
}

.blog-card .card-body {
  padding: 28px;
}

.blog-card .category {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--royal-blue);
  margin-bottom: 12px;
}

.blog-card h3 {
  margin-bottom: 12px;
  font-size: 1.15rem;
}

.blog-card p {
  font-size: 0.95rem;
  opacity: 0.85;
  margin-bottom: 20px;
  line-height: 1.6;
}

/* --- Feature Items --- */
.feature-item {
  padding: 24px 0;
}

.feature-item .icon {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  color: var(--royal-blue);
}

.feature-item h3 {
  margin-bottom: 8px;
  font-size: 1.15rem;
}

.feature-item p {
  font-size: 0.95rem;
  opacity: 0.8;
  line-height: 1.6;
}

/* --- FAQ Accordion --- */
.faq-item {
  border-bottom: 1px solid var(--glass-border);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  color: var(--pure-white);
  font-family: var(--font-primary);
  font-size: 1.05rem;
  font-weight: 500;
  transition: color var(--transition-base);
}

.faq-question:hover {
  color: var(--royal-blue);
}

.faq-question .icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  transition: transform var(--transition-base);
  color: var(--ice-blue);
}

.faq-item.active .faq-question .icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding-bottom: 24px;
}

.faq-answer p {
  color: var(--ice-blue);
  opacity: 0.85;
  line-height: 1.7;
  font-size: 0.95rem;
}

/* FAQ Category */
.faq-category {
  margin-bottom: 48px;
}

.faq-category h3 {
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--royal-blue);
  display: inline-block;
}

/* --- Forms --- */
.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-family: var(--font-primary);
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--ice-blue);
  opacity: 0.8;
  margin-bottom: 8px;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 14px 18px;
  background: rgba(198, 216, 255, 0.08);
  border: 1px solid rgba(198, 216, 255, 0.2);
  border-radius: var(--radius-md);
  font-family: var(--font-primary);
  font-size: 1rem;
  color: var(--ice-blue);
  transition: all var(--transition-base);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--ice-blue);
  opacity: 0.5;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  border-color: var(--royal-blue);
  box-shadow: var(--shadow-input-focus);
  outline: none;
}

.form-input.error,
.form-textarea.error,
.form-select.error {
  border-color: var(--error-red);
}

.error-message {
  color: var(--error-red);
  font-size: 0.85rem;
  margin-top: 6px;
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-success {
  background: rgba(46, 157, 90, 0.1);
  border: 1px solid var(--success-green);
  border-radius: var(--radius-md);
  padding: 24px;
  color: var(--success-green);
  text-align: center;
}

.form-container {
  background: rgba(198, 216, 255, 0.06);
  border: 1px solid rgba(198, 216, 255, 0.12);
  border-radius: var(--radius-xl);
  padding: 40px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

@media (max-width: 767px) {
  .form-container {
    padding: 24px;
  }
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  text-align: center;
  padding: 120px 24px 80px;
}

.hero-content {
  position: relative;
  z-index: 10;
  max-width: 700px;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 58% center;
}

.hero-photo {
  align-items: flex-start;
  text-align: left;
  padding-left: max(24px, calc((100vw - 1120px) / 2 + 24px));
  padding-right: 24px;
}

.hero-photo .hero-content {
  max-width: 620px;
}

.hero-photo .hero-ctas,
.hero-photo .hero-trust {
  justify-content: flex-start;
}

.hero .eyebrow {
  margin-bottom: 24px;
}

.hero h1 {
  margin-bottom: 24px;
}

.hero h1 .accent {
  color: var(--royal-blue);
}

.hero .subheadline {
  margin-bottom: 40px;
  opacity: 0.9;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-bottom: 32px;
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  justify-content: center;
  align-items: center;
  font-size: 0.85rem;
  color: var(--ice-blue);
  opacity: 0.7;
}

.hero-trust .dot {
  width: 4px;
  height: 4px;
  background: var(--ice-blue);
  border-radius: 50%;
  opacity: 0.5;
}

/* Hero particle canvas container */
.hero-canvas-container {
  position: absolute;
  inset: 0;
  z-index: 1;
  opacity: 0.35;
}

.hero-photo .hero-canvas-container {
  display: none;
}

.hero-canvas-container canvas {
  position: absolute;
  top: 0;
  left: 0;
}

#particle-fbo {
  z-index: 2;
  pointer-events: none;
}

#particle-persistence {
  z-index: 1;
  pointer-events: none;
}

.hero-gradient-overlay {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(0, 10, 26, 0.78) 0%, rgba(0, 10, 26, 0.48) 45%, rgba(0, 10, 26, 0.22) 100%),
    radial-gradient(ellipse at center, transparent 0%, rgba(0, 10, 26, 0.55) 100%);
}

@media (max-width: 767px) {
  .hero-photo {
    align-items: center;
    text-align: center;
    padding-left: 24px;
  }

  .hero-photo .hero-ctas,
  .hero-photo .hero-trust {
    justify-content: center;
  }

  .hero-media img {
    object-position: 62% center;
  }
}

/* --- Image styling --- */
.image-rounded {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.image-rounded img {
  width: 100%;
  height: auto;
  display: block;
}

.image-shadow {
  box-shadow: var(--shadow-image);
}

.image-tint::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--royal-blue);
  opacity: 0.08;
  pointer-events: none;
  border-radius: inherit;
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 76px;
  background: rgba(0, 18, 51, 0.76);
  backdrop-filter: blur(18px) saturate(130%);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
  border-bottom: 1px solid rgba(198, 216, 255, 0.12);
  box-shadow: 0 16px 44px rgba(0, 10, 26, 0.18);
  z-index: 100;
  transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), backdrop-filter var(--transition-base);
}

.nav.scrolled {
  background: rgba(0, 18, 51, 0.94);
  border-color: rgba(198, 216, 255, 0.18);
  box-shadow: 0 18px 52px rgba(0, 10, 26, 0.32);
  backdrop-filter: blur(22px) saturate(140%);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

@media (min-width: 768px) {
  .nav-inner {
    padding: 0 32px;
  }
}

@media (min-width: 1024px) {
  .nav-inner {
    padding: 0 40px;
  }
}

.nav-logo {
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: clamp(0.98rem, 1.4vw, 1.12rem);
  line-height: 1.1;
  color: var(--pure-white);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0;
}

.nav-logo:hover {
  color: var(--ice-blue);
}

.nav-links {
  display: none;
  align-items: center;
  gap: clamp(10px, 1.35vw, 22px);
  list-style: none;
  flex: 1;
  justify-content: center;
  min-width: 0;
}

@media (min-width: 1120px) {
  .nav-links {
    display: flex;
  }
}

.nav-links a {
  font-family: var(--font-primary);
  font-weight: 500;
  font-size: clamp(0.78rem, 0.86vw, 0.9rem);
  line-height: 1.25;
  color: var(--ice-blue);
  text-decoration: none;
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 8px 10px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: color var(--transition-base), background var(--transition-base);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 14px;
  width: 0;
  height: 2px;
  background: var(--royal-blue);
  border-radius: var(--radius-pill);
  transition: width var(--transition-base);
}

.nav-links a:hover {
  color: var(--pure-white);
  background: rgba(198, 216, 255, 0.08);
}

.nav-links a:hover::after,
.nav-links a.is-active::after {
  width: calc(100% - 28px);
}

.nav-links a.is-active {
  color: var(--pure-white);
  background: rgba(198, 216, 255, 0.12);
}

.nav-cta {
  display: none;
}

@media (min-width: 1120px) {
  .nav-cta {
    display: inline-flex;
    flex: 0 0 auto;
  }
}

/* Mobile menu toggle */
.menu-toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: rgba(198, 216, 255, 0.08);
  border: 1px solid rgba(198, 216, 255, 0.16);
  border-radius: var(--radius-pill);
  cursor: pointer;
  padding: 0;
  transition: background var(--transition-base), border-color var(--transition-base);
}

.menu-toggle:hover {
  background: rgba(198, 216, 255, 0.14);
  border-color: rgba(198, 216, 255, 0.28);
}

@media (min-width: 1120px) {
  .menu-toggle {
    display: none;
  }
}

.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--ice-blue);
  border-radius: var(--radius-pill);
  transition: all var(--transition-base);
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu overlay */
.mobile-menu {
  position: fixed;
  top: 76px;
  left: 12px;
  right: 12px;
  bottom: auto;
  max-height: calc(100vh - 92px);
  overflow-y: auto;
  background: rgba(0, 18, 51, 0.96);
  border: 1px solid rgba(198, 216, 255, 0.16);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 80px rgba(0, 10, 26, 0.42);
  backdrop-filter: blur(22px) saturate(140%);
  -webkit-backdrop-filter: blur(22px) saturate(140%);
  z-index: 99;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  justify-content: flex-start;
  gap: 6px;
  padding: 16px;
  opacity: 0;
  transform: translateY(-10px) scale(0.98);
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.mobile-menu.active {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: all;
}

.mobile-menu a {
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.2;
  color: var(--ice-blue);
  text-decoration: none;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  transition: color var(--transition-base), background var(--transition-base);
}

.mobile-menu a:hover {
  color: var(--pure-white);
  background: rgba(198, 216, 255, 0.08);
}

.mobile-menu a.is-active {
  color: var(--pure-white);
  background: rgba(4, 102, 200, 0.22);
}

.mobile-menu .btn {
  margin-top: 8px;
  color: var(--pure-white);
  text-align: center;
}

/* --- Footer --- */
.footer {
  background: rgba(0, 10, 26, 0.95);
  border-top: 1px solid rgba(198, 216, 255, 0.10);
  padding-top: 80px;
  padding-bottom: 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
  }
}

.footer-brand .logo {
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--pure-white);
  margin-bottom: 16px;
  display: inline-block;
}

.footer-brand p {
  font-size: 0.95rem;
  opacity: 0.7;
  max-width: 240px;
  margin-bottom: 20px;
  line-height: 1.6;
}

.footer-social {
  display: flex;
  gap: 16px;
}

.footer-social a {
  color: var(--ice-blue);
  transition: color var(--transition-base);
}

.footer-social a:hover {
  color: var(--royal-blue);
}

.footer-social svg {
  width: 24px;
  height: 24px;
}

.footer-column h4 {
  font-size: 0.85rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--royal-blue);
  margin-bottom: 20px;
}

.footer-column ul {
  list-style: none;
}

.footer-column li {
  margin-bottom: 12px;
}

.footer-column a {
  color: var(--ice-blue);
  font-size: 0.95rem;
  text-decoration: none;
  transition: color var(--transition-base);
}

.footer-column a:hover {
  color: var(--pure-white);
}

.footer-bottom {
  border-top: 1px solid rgba(198, 216, 255, 0.08);
  padding-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  text-align: center;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-bottom p {
  font-size: 0.85rem;
  opacity: 0.5;
}

.footer-bottom a {
  color: var(--ice-blue);
  opacity: 0.5;
  text-decoration: none;
  transition: opacity var(--transition-base);
}

.footer-bottom a:hover {
  opacity: 1;
}

/* --- Back to Top Button --- */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-pill);
  background: var(--royal-blue);
  color: var(--pure-white);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  pointer-events: none;
  transition: all var(--transition-base);
  z-index: 90;
  box-shadow: var(--shadow-glow);
}

.back-to-top.visible {
  opacity: 1;
  transform: scale(1);
  pointer-events: all;
}

.back-to-top:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 24px rgba(4, 102, 200, 0.5);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* --- Guide Page Specific Styles --- */
.guide-hero {
  padding-top: 140px;
  padding-bottom: 80px;
  text-align: center;
}

.guide-hero h1 {
  margin-bottom: 20px;
}

.guide-hero p {
  max-width: 640px;
  margin: 0 auto;
}

.guide-content {
  max-width: 800px;
  margin: 0 auto;
}

.guide-content h2 {
  margin-top: 48px;
  margin-bottom: 20px;
}

.guide-content h3 {
  margin-top: 32px;
  margin-bottom: 12px;
  font-size: 1.3rem;
}

.guide-content p {
  margin-bottom: 20px;
  line-height: 1.75;
  opacity: 0.9;
}

.guide-content ul,
.guide-content ol {
  margin-bottom: 24px;
  padding-left: 24px;
}

.guide-content li {
  margin-bottom: 12px;
  line-height: 1.7;
  opacity: 0.9;
}

.guide-content a {
  text-decoration: underline;
  text-underline-offset: 2px;
}

.toc {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-bottom: 48px;
}

.toc h3 {
  margin-bottom: 16px;
  font-size: 1.1rem;
}

.toc ul {
  list-style: none;
  padding: 0;
}

.toc li {
  margin-bottom: 8px;
}

.toc a {
  color: var(--ice-blue);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

.safety-checklist {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin: 32px 0;
}

.safety-checklist h3 {
  margin-bottom: 20px;
}

.safety-checklist ul {
  list-style: none;
  padding: 0;
}

.safety-checklist li {
  padding-left: 32px;
  position: relative;
  margin-bottom: 12px;
}

.safety-checklist li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--success-green);
  font-weight: 700;
}

.red-flag-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 32px 0;
}

@media (min-width: 640px) {
  .red-flag-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.red-flag-card {
  background: rgba(224, 70, 70, 0.08);
  border: 1px solid rgba(224, 70, 70, 0.2);
  border-radius: var(--radius-md);
  padding: 24px;
}

.red-flag-card h4 {
  color: var(--error-red);
  margin-bottom: 8px;
  font-size: 1rem;
}

.red-flag-card p {
  font-size: 0.9rem;
  opacity: 0.85;
  margin: 0;
}

/* --- Entrance Animation Classes --- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

.animate-fade-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-fade-left.animated {
  opacity: 1;
  transform: translateX(0);
}

.animate-fade-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-fade-right.animated {
  opacity: 1;
  transform: translateX(0);
}

/* Stagger delays */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

/* --- Utility Classes --- */
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 32px; }
.mb-5 { margin-bottom: 48px; }
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 32px; }
.mt-5 { margin-top: 48px; }

.hidden { display: none; }

@media (max-width: 767px) {
  .hide-mobile { display: none; }
}

@media (min-width: 768px) {
  .hide-desktop { display: none; }
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .animate-on-scroll,
  .animate-fade-left,
  .animate-fade-right {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero-canvas-container {
    display: none;
  }

  .hero {
    background: linear-gradient(135deg, var(--midnight-navy) 0%, var(--abyssal) 100%);
  }
}

/* --- Print Styles --- */
@media print {
  .nav,
  .hero-canvas-container,
  .hero-gradient-overlay,
  .mobile-menu,
  .back-to-top,
  .btn {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .section {
    padding: 40px 0;
  }
}