/* ==========================================================================
   THE SMILE DESIGN SYSTEM - PREMIUM LIGHT MODE
   ========================================================================== */

/* 1. CSS VARIABLES & SYSTEM TOKENS */
:root {
  --bg-main: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #ffffff;
  --border-card: #e2e8f0;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --color-primary: #1e40af; /* Royal Blue */
  --color-primary-rgb: 30, 64, 175;
  --color-primary-glow: rgba(30, 64, 175, 0.05);
  --color-secondary: #0ea5e9; /* Sky Blue */
  --color-secondary-rgb: 14, 165, 233;
  --color-accent: #facc15; /* Amber Yellow */
  --color-accent-rgb: 250, 204, 21;
  --card-shadow: 0 10px 30px rgba(30, 64, 175, 0.04);
  --card-shadow-hover: 0 16px 36px rgba(30, 64, 175, 0.08);
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --container-max-width: 1200px;
}

/* 2. BASE RESET & SCROLLING */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  background-color: var(--bg-main);
  color: var(--text-primary);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
  position: relative;
  line-height: 1.6;
}

/* 3. TYPOGRAPHY & HEADINGS */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-primary);
  font-weight: 700;
  line-height: 1.25;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 700;
  margin-bottom: 1rem;
}

h3 {
  font-size: clamp(1.35rem, 2vw, 1.75rem);
}

p {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-smooth);
}

/* 4. UTILITIES & CONTAINER */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem auto;
}

.section-label {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-primary);
  background-color: var(--color-primary-glow);
  padding: 0.4rem 1rem;
  border-radius: 99px;
  margin-bottom: 1rem;
}

.section-label-white {
  color: var(--color-accent);
  background-color: rgba(250, 204, 21, 0.1);
}

/* 5. BACKGROUND DECORATIONS */
.bg-decoration {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
}

.bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.35;
}

.bg-blob-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.25) 0%, rgba(30, 64, 175, 0.05) 100%);
  top: -200px;
  right: -100px;
}

.bg-blob-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(30, 64, 175, 0.2) 0%, rgba(14, 165, 233, 0.02) 100%);
  top: 800px;
  left: -200px;
}

/* 6. BUTTON SYSTEM */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.8rem 1.8rem;
  border-radius: 99px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition-smooth);
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #ffffff;
  box-shadow: 0 4px 15px rgba(30, 64, 175, 0.15);
}

.btn-primary:hover {
  transform: scale(1.04);
  box-shadow: 0 6px 20px rgba(30, 64, 175, 0.25);
}

.btn-secondary {
  background-color: var(--bg-main);
  border-color: var(--border-card);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background-color: rgba(30, 64, 175, 0.03);
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 1.1rem 2.2rem;
  font-size: 1.1rem;
}

.btn-full {
  width: 100%;
}

/* 7. PREMIUM STYLING FOR CARDS (CLEAN SHADOW CARDS) */
.clean-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 24px;
  box-shadow: var(--card-shadow);
  transition: var(--transition-smooth);
  overflow: hidden;
}

.clean-card:hover {
  transform: translateY(-6px);
  border-color: rgba(30, 64, 175, 0.18);
  box-shadow: var(--card-shadow-hover);
}

/* 8. NAVBAR (GLASSMORPHISM) */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  padding: 1rem 0;
  transition: var(--transition-smooth);
}

.navbar.scrolled {
  padding: 0.75rem 0;
  box-shadow: 0 4px 20px rgba(30, 64, 175, 0.04);
  background-color: rgba(255, 255, 255, 0.92);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
}

.logo-icon {
  width: 28px;
  height: 28px;
  stroke: var(--color-primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.975rem;
  color: var(--text-secondary);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transition: var(--transition-smooth);
}

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

.nav-links a:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-cta {
  padding: 0.6rem 1.4rem;
  font-size: 0.9rem;
}

.mobile-cta {
  display: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 6px;
  width: 30px;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2.5px;
  background-color: var(--text-primary);
  border-radius: 4px;
  transition: var(--transition-smooth);
}

/* 9. HERO SECTION */
.hero {
  padding-top: 180px;
  padding-bottom: 100px;
  position: relative;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  background-color: var(--color-primary-glow);
  border: 1px solid rgba(30, 64, 175, 0.1);
  padding: 0.5rem 1rem;
  border-radius: 99px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
}

.hero-title {
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.hero-sub {
  font-size: 1.15rem;
  line-height: 1.7;
  margin-bottom: 2.5rem;
  max-width: 600px;
}

.hero-ctas {
  display: flex;
  gap: 1rem;
  margin-bottom: 3rem;
  width: 100%;
}

.hero-trust {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.trust-icon {
  width: 20px;
  height: 20px;
  color: var(--color-secondary);
  flex-shrink: 0;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-video-wrap {
  position: relative;
  width: 100%;
  max-width: 540px;
  aspect-ratio: 16 / 9;
  border-radius: 24px;
}

.hero-video-bg {
  position: absolute;
  top: 12px;
  left: 12px;
  right: -12px;
  bottom: -12px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(30,64,175,0.06), rgba(14,165,233,0.14));
  z-index: 1;
}

.hero-video-inner {
  position: relative;
  width: 100%;
  height: 100%;
  background: #000000;
  border: 1px solid var(--border-card);
  border-radius: 24px;
  z-index: 2;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(30, 64, 175, 0.08);
}

.hero-video-inner iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}


/* 10. IMPACT SECTION (STATS & MARQUEE) */
.impact {
  padding-bottom: 80px;
}

.impact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 5rem;
}

.impact-item {
  text-align: center;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-card);
  padding: 2rem 1.5rem;
  border-radius: 20px;
  transition: var(--transition-smooth);
}

.impact-item:hover {
  background-color: #ffffff;
  border-color: rgba(30, 64, 175, 0.15);
  transform: translateY(-4px);
  box-shadow: var(--card-shadow);
}

.impact-number {
  display: block;
  font-family: var(--font-heading);
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.impact-label {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
}

/* MARQUEE BRAND LOGOS */
.marquee-wrap {
  padding: 2.5rem 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-card);
  border-bottom: 1px solid var(--border-card);
  overflow: hidden;
}

.marquee-title {
  font-family: var(--font-heading);
  text-align: center;
  font-size: 0.9rem;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
}

.marquee-track-container {
  display: flex;
  overflow: hidden;
  position: relative;
  width: 100%;
}

.marquee-track {
  display: flex;
  gap: 4rem;
  white-space: nowrap;
  animation: marquee 25s linear infinite;
}

.marquee-logos {
  display: flex;
  align-items: center;
  gap: 4rem;
}

.logo-item {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.5rem;
  color: rgba(71, 85, 105, 0.45);
  transition: var(--transition-smooth);
}

.logo-item:hover {
  color: var(--color-primary);
  opacity: 1;
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* 11. SERVICES & PRICING SECTION */
.services {
  padding: 100px 0;
  background-color: var(--bg-main);
  position: relative;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  align-items: stretch;
}

.service-card {
  padding: 3rem 2.25rem 2.5rem 2.25rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  position: relative;
}

.card-badge {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.35rem 0.85rem;
  border-radius: 99px;
  margin-bottom: 1.5rem;
}

.bg-soft-blue {
  background-color: rgba(14, 165, 233, 0.1);
  color: var(--color-secondary);
}

.bg-blue {
  background-color: var(--color-primary);
  color: #ffffff;
}

.bg-amber {
  background-color: rgba(250, 204, 21, 0.15);
  color: #b45309;
}

.service-card h3 {
  margin-bottom: 0.75rem;
}

.service-desc {
  font-size: 0.95rem;
  line-height: 1.5;
  margin-bottom: 2rem;
  height: 4.5rem;
}

.price-block {
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
}

.price-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.price-value {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.price-unit {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.25rem;
}

.price-brackets {
  width: 100%;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-card);
  border-radius: 14px;
  padding: 1rem;
  margin-bottom: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.bracket-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.875rem;
}

.bracket-item strong {
  color: var(--text-primary);
}

.bracket-item span {
  color: var(--color-primary);
  font-weight: 600;
}

.perk-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 2.5rem;
  width: 100%;
  flex-grow: 1;
}

.perk-list li {
  font-size: 0.95rem;
  color: var(--text-secondary);
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.perk-list li span {
  color: #10b981;
  font-weight: 700;
}

/* Featured Service Card Highlight */
.card-featured {
  border-color: var(--color-primary);
  box-shadow: 0 20px 40px rgba(30, 64, 175, 0.07);
}

.card-featured:hover {
  border-color: var(--color-primary);
  box-shadow: 0 25px 45px rgba(30, 64, 175, 0.12);
}

.card-featured .price-value {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 12. PROOF SECTION */
.proof {
  padding: 100px 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-card);
  border-bottom: 1px solid var(--border-card);
}

.proof-inner {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 5rem;
  align-items: center;
}

.proof-stats-card {
  padding: 3rem 2.5rem;
  background-color: #ffffff;
  border-radius: 28px;
}

.proof-stats-card h4 {
  font-size: 1.25rem;
  margin-bottom: 2rem;
  text-align: center;
  color: var(--text-primary);
}

.proof-stats-grid {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.proof-stat-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-card);
  padding-bottom: 1rem;
}

.proof-stat-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.stat-big {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-primary);
}

.proof-stat-item small {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-align: right;
}

.proof-content h2 {
  margin-bottom: 1.5rem;
}

.proof-content p {
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

.tick-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
  margin-bottom: 2.5rem;
}

.tick-list li {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.tick-icon {
  width: 22px;
  height: 22px;
  color: #10b981;
  background-color: rgba(16, 185, 129, 0.1);
  padding: 3px;
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 2px;
}

.tick-list li span {
  font-size: 1.05rem;
  color: var(--text-primary);
  font-weight: 500;
}

/* 13. ABOUT SECTION (ストーリー ＆ SKILLS MATRIX) */
.about {
  padding: 100px 0;
  background-color: var(--bg-main);
}

.about-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 5rem;
  align-items: start;
}

.about-text {
  margin-top: 1rem;
  margin-bottom: 2.5rem;
  font-size: 1.05rem;
  line-height: 1.7;
}

.education-strip {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.edu-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.edu-icon {
  font-size: 1.75rem;
  padding: 0.4rem;
  background-color: var(--color-primary-glow);
  border-radius: 12px;
  display: inline-flex;
}

.edu-item div {
  display: flex;
  flex-direction: column;
}

.edu-item strong {
  font-size: 1.05rem;
  color: var(--text-primary);
}

.edu-item small {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 0.15rem;
}

.skills-group {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-card);
  border-radius: 20px;
  padding: 2rem;
  margin-bottom: 1.5rem;
}

.skills-group:last-child {
  margin-bottom: 0;
}

.skills-title {
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
  color: var(--text-primary);
}

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.skill-badge {
  background-color: #ffffff;
  border: 1px solid var(--border-card);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 550;
  padding: 0.5rem 1rem;
  border-radius: 12px;
  transition: var(--transition-smooth);
}

.skill-badge:hover {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

/* 14. BLOG SECTION */
.blog {
  padding: 100px 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-card);
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.blog-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.blog-img {
  background-size: cover;
  background-position: center;
  position: relative;
  width: 100%;
  border-bottom: 1px solid var(--border-card);
}

.blog-body {
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.blog-tag {
  align-self: flex-start;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.3rem 0.75rem;
  border-radius: 99px;
  margin-bottom: 1rem;
}

.blog-title {
  font-size: 1.15rem;
  margin-bottom: 0.85rem;
  line-height: 1.4;
  color: var(--text-primary);
  transition: var(--transition-smooth);
}

.blog-card:hover .blog-title {
  color: var(--color-primary);
}

.blog-excerpt {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.blog-link {
  margin-top: auto;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
}

.blog-link:hover {
  color: var(--color-secondary);
  transform: translateX(4px);
}

/* 15. CONTACT SECTION & LEAD FORM */
.contact {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, #1e3a8a 100%);
  color: #ffffff;
  position: relative;
  overflow: hidden;
}

.contact::before {
  content: '';
  position: absolute;
  top: -150px;
  right: -150px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(14,165,233,0.15) 0%, rgba(255,255,255,0) 70%);
  z-index: 1;
}

.contact-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 5rem;
  align-items: center;
  position: relative;
  z-index: 2;
}

.contact-left h2 {
  color: #ffffff;
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  margin-bottom: 1.5rem;
}

.contact-sub {
  color: rgba(255, 255, 255, 0.75);
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 3rem;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 1rem;
  color: #ffffff;
  font-size: 1.1rem;
  font-weight: 500;
  transition: var(--transition-smooth);
}

a.contact-link:hover {
  color: var(--color-accent);
  transform: translateX(6px);
}

.contact-icon {
  font-size: 1.5rem;
  background-color: rgba(255, 255, 255, 0.1);
  padding: 0.5rem;
  border-radius: 12px;
  display: inline-flex;
}

/* Contact Lead Form Styles */
.contact-right {
  background-color: #ffffff;
  border-radius: 28px;
  padding: 3rem 2.5rem;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.khung-nhap-lieu {
  width: 100%;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-card);
  border-radius: 12px;
  padding: 0.9rem 1.1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--text-primary);
  transition: var(--transition-smooth);
}

.khung-nhap-lieu::placeholder {
  color: #94a3b8;
}

.khung-nhap-lieu:focus {
  outline: none;
  background-color: #ffffff;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(30, 64, 175, 0.08);
}

select.khung-nhap-lieu {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1.1rem center;
  background-size: 1.2rem;
  padding-right: 2.5rem;
  cursor: pointer;
}

#submit-btn {
  border: none;
  margin-top: 0.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 1.1rem;
}

/* 16. TOAST NOTIFICATION STYLING */
.toast-notification {
  position: fixed;
  bottom: 30px;
  right: 30px;
  z-index: 2000;
  background-color: #ffffff;
  border: 1px solid rgba(16, 185, 129, 0.2);
  border-radius: 20px;
  padding: 1.2rem 1.8rem;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.08);
  transform: translateY(150px) scale(0.9);
  opacity: 0;
  visibility: hidden;
  transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.toast-notification.active {
  transform: translateY(0) scale(1);
  opacity: 1;
  visibility: visible;
}

.toast-content {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.toast-check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: rgba(16, 185, 129, 0.1);
  color: #10b981;
  font-size: 1.25rem;
  font-weight: 800;
  border-radius: 50%;
  flex-shrink: 0;
}

.toast-content h5 {
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: 0.15rem;
}

.toast-content p {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* 17. FOOTER STYLING */
.footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-card);
  padding: 4rem 0 2rem 0;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2.5rem;
}

.footer-left {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-logo {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--color-primary);
}

.footer-tagline {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

.footer-links {
  display: flex;
  gap: 3rem;
}

.footer-links a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-weight: 550;
}

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

.footer-copy {
  font-size: 0.85rem;
  color: rgba(71, 85, 105, 0.6);
  border-top: 1px solid var(--border-card);
  width: 100%;
  text-align: center;
  padding-top: 1.5rem;
}

/* 18. SCROLL REVEAL (JS BINDING) */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* 19. RESPONSIVE DESIGN (MOBILE & TABLET ADAPTATION) */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }
  
  .hero-content {
    align-items: center;
  }
  
  .hero-sub {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-ctas {
    justify-content: center;
  }
  
  .hero-trust {
    align-items: center;
  }
  
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .services-grid > article:last-child {
    grid-column: span 2;
    max-width: 50%;
    margin: 0 auto;
  }
  
  .proof-inner {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }
  
  .about-inner {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }
  
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .blog-grid > article:last-child {
    grid-column: span 2;
    max-width: 50%;
    margin: 0 auto;
  }
  
  .contact-inner {
    grid-template-columns: 1fr;
    gap: 3.5rem;
  }
}

@media (max-width: 768px) {
  /* Spacing */
  .hero {
    padding-top: 140px;
    padding-bottom: 60px;
  }
  
  .services, .proof, .about, .blog, .contact {
    padding: 60px 0;
  }
  
  /* Navigation */
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: #ffffff;
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.05);
    flex-direction: column;
    padding: 100px 2rem 2rem 2rem;
    align-items: flex-start;
    gap: 3rem;
    z-index: 999;
    transition: var(--transition-smooth);
  }
  
  .nav-menu.nav-active {
    right: 0;
  }
  
  .nav-links {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: 1.75rem;
  }
  
  .nav-links a {
    font-size: 1.15rem;
    width: 100%;
    display: block;
  }
  
  .desktop-cta {
    display: none;
  }
  
  .mobile-cta {
    display: flex;
    width: 100%;
  }
  
  .nav-toggle {
    display: flex;
    z-index: 1000;
  }
  
  /* Toggle Animation */
  .nav-toggle.open span:nth-child(1) {
    transform: translateY(8.5px) rotate(45deg);
  }
  
  .nav-toggle.open span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.open span:nth-child(3) {
    transform: translateY(-8.5px) rotate(-45deg);
  }
  
  /* Grids & Cards */
  .impact-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }
  
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .services-grid > article:last-child {
    grid-column: auto;
    max-width: 100%;
  }
  
  .blog-grid {
    grid-template-columns: 1fr;
  }
  
  .blog-grid > article:last-child {
    grid-column: auto;
    max-width: 100%;
  }
  
  .hero-video-wrap {
    max-width: 100%;
  }
  
  .hero-ctas {
    flex-direction: column;
    gap: 0.75rem;
  }
  
  .footer-links {
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
  }
}

@media (max-width: 480px) {
  .impact-grid {
    grid-template-columns: 1fr;
  }
  
  .proof-stats-card {
    padding: 2rem 1.5rem;
  }
  
  .proof-stats-grid {
    gap: 1.5rem;
  }
  
  .stat-big {
    font-size: 1.85rem;
  }
  
  .contact-right {
    padding: 2rem 1.5rem;
  }
}