/* ─── SI Digital Technologies – Design System ─── */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:ital,wght@0,100..900;1,100..900&family=Outfit:wght@400;500;600;700;800&display=swap');

/* ── Custom Properties ── */
:root {
  /* Brand blues from logo */
  --brand-deep: #0d2b5e;
  --brand: #1565c0;
  --brand-bright: #2196f3;
  --brand-light: #64b5f6;
  --brand-glow: #42a5f5;
  --brand-surface: rgba(21, 101, 192, 0.08);

  /* Silver/grey from logo */
  --silver: #9e9e9e;
  --silver-light: #c0c0c0;
  --silver-dark: #6b6b6b;

  /* Surfaces */
  --bg-deep: #060c1a;
  --bg-primary: #0a1628;
  --bg-card: #0f1f3a;
  --bg-card-hover: #132a4d;
  --border: #1a2e50;
  --border-subtle: #132240;

  /* Text */
  --text-primary: #f0f4f8;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-accent: #64b5f6;

  /* Shadows */
  --shadow-brand: 0 0 60px rgba(33, 150, 243, 0.15);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(33, 150, 243, 0.25);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  height: 100%;
}

body {
  font-family: 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ── Typography ── */
h1,
h2,
h3,
h4 {
  font-family: 'Outfit', 'Montserrat', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.25s ease;
}

/* ── Layout Containers ── */
.container {
  max-width: 1152px;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .container {
    padding: 0 1.5rem;
  }
}

@media (min-width: 1024px) {
  .container {
    padding: 0 2rem;
  }
}

/* ── Header / Navbar ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid var(--border-subtle);
  background: rgba(6, 12, 26, 0.85);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  backdrop-filter: blur(16px) saturate(180%);
  transition: box-shadow 0.3s ease;
}

.site-header.is-scrolled {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: auto;
  padding: 0.5rem 0;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Logo */
.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-img-wrap {
  position: relative;
}

.logo-img {
  height: 100px;
  width: auto;
  transition: transform 0.3s ease;
  margin: 0.25rem 0;
}

@media (min-width: 768px) {
  .logo-img {
    height: 140px;
  }
}

.logo-link:hover .logo-img {
  transform: scale(1.05);
}

.logo-glow {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--brand-bright);
  opacity: 0;
  filter: blur(16px);
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.logo-link:hover .logo-glow {
  opacity: 0.3;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}


.logo-name {
  font-family: 'Outfit', sans-serif;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--brand-bright);
  letter-spacing: 0.02em;
}

.logo-tagline {
  font-size: 0.6875rem;
  color: var(--text-secondary);
  transition: letter-spacing 0.3s ease;
}

.logo-link:hover .logo-tagline {
  letter-spacing: 0.05em;
}

/* Desktop Nav */
.nav-desktop {
  display: none;
  align-items: center;
  gap: 2rem;
}

.nav-desktop a {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 0.25rem 0;
}

.nav-desktop a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand), var(--brand-bright));
  border-radius: 1px;
  transition: width 0.3s ease;
}

.nav-desktop a:hover {
  color: var(--brand-bright);
}

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

@media (min-width: 768px) {
  .nav-desktop {
    display: flex;
  }
}

/* CTA Button – Header */
.btn-demo-header {
  display: none;
  align-items: center;
  border-radius: 9999px;
  border: 1px solid rgba(33, 150, 243, 0.3);
  background: rgba(33, 150, 243, 0.1);
  padding: 0.375rem 1rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--brand-bright);
  cursor: pointer;
  transition: all 0.25s ease;
}

.btn-demo-header:hover {
  background: rgba(33, 150, 243, 0.2);
  border-color: rgba(33, 150, 243, 0.5);
}

@media (min-width: 640px) {
  .btn-demo-header {
    display: inline-flex;
  }
}

/* Mobile Toggle */
.mobile-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  border: 1px solid var(--border);
  background: transparent;
  padding: 0.5rem;
  color: var(--text-primary);
  cursor: pointer;
  transition: background 0.2s;
}

.mobile-toggle:hover {
  background: var(--bg-card);
}

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

.mobile-toggle svg {
  width: 1.25rem;
  height: 1.25rem;
}

#icon-close {
  display: none;
}

/* Mobile Nav */
.nav-mobile {
  display: none;
  padding-bottom: 1rem;
}

.nav-mobile.is-open {
  display: block;
}

.nav-mobile a {
  display: block;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  border-radius: 0.5rem;
  transition: background 0.2s;
}

.nav-mobile a:hover {
  background: var(--bg-card);
  color: var(--brand-bright);
}

@media (min-width: 768px) {
  .nav-mobile {
    display: none !important;
  }
}

/* ── Hero Section ── */
.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg-deep) 0%, var(--bg-primary) 60%, var(--bg-card) 100%);
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero-bg-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.hero-bg-orb--blue {
  width: 28rem;
  height: 28rem;
  top: -10rem;
  right: -8rem;
  background: rgba(33, 150, 243, 0.08);
}

.hero-bg-orb--navy {
  width: 24rem;
  height: 24rem;
  bottom: -10rem;
  left: -6rem;
  background: rgba(13, 43, 94, 0.2);
}

.hero-bg-orb--silver {
  width: 20rem;
  height: 20rem;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(158, 158, 158, 0.05);
}

/* Logo showcase in hero */
.hero-logo-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
  padding-top: 2.5rem;
}

.hero-logo {
  height: 10rem;
  width: auto;
  filter: drop-shadow(0 0 40px rgba(33, 150, 243, 0.35));
  animation: heroFloat 6s ease-in-out infinite;
  opacity: 0;
  transform: translateY(-1.5rem) scale(0.95);
  animation: heroFadeIn 0.9s ease-out 0.15s forwards, heroFloat 6s ease-in-out 1s infinite;
}

@media (min-width: 640px) {
  .hero-logo {
    height: 12rem;
  }
}

@media (min-width: 1024px) {
  .hero-logo {
    height: 16rem;
  }
}

@keyframes heroFloat {

  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-10px);
  }
}

@keyframes heroFadeIn {
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Hero content grid */
.hero-grid {
  display: grid;
  gap: 3rem;
  align-items: center;
  padding: 4rem 0;
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }
}

/* Badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  border-radius: 9999px;
  border: 1px solid rgba(33, 150, 243, 0.3);
  background: rgba(33, 150, 243, 0.08);
  padding: 0.25rem 0.75rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--brand-bright);
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: 1.875rem;
  color: var(--text-primary);
}

.hero h1 .accent {
  display: block;
  color: var(--brand-bright);
  margin-top: 0.25rem;
}

@media (min-width: 640px) {
  .hero h1 {
    font-size: 2.25rem;
  }
}

@media (min-width: 1024px) {
  .hero h1 {
    font-size: 3rem;
  }
}

.hero-desc {
  margin-top: 1rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  max-width: 36rem;
  line-height: 1.7;
}

@media (min-width: 640px) {
  .hero-desc {
    font-size: 1rem;
  }
}

/* Hero CTA buttons */
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  background: linear-gradient(135deg, var(--brand), var(--brand-bright));
  padding: 0.625rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: #fff;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 24px rgba(33, 150, 243, 0.3);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.15));
  opacity: 0;
  transition: opacity 0.3s;
}

.btn-primary:hover {
  transform: scale(1.03);
  box-shadow: 0 8px 32px rgba(33, 150, 243, 0.4);
}

.btn-primary:hover::before {
  opacity: 1;
}

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

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  border: 1px solid var(--border);
  background: transparent;
  padding: 0.625rem 1.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.25s ease;
}

.btn-outline:hover {
  background: var(--bg-card);
  border-color: var(--brand);
}

/* Hero stats */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-top: 2rem;
}

.hero-stats dt {
  font-weight: 700;
  color: var(--text-primary);
  font-size: 0.875rem;
}

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

@media (min-width: 640px) {
  .hero-stats dt {
    font-size: 1rem;
  }

  .hero-stats dd {
    font-size: 0.8125rem;
  }
}

/* ── Live Demo Card ── */
.demo-card {
  position: relative;
  border-radius: 1.5rem;
  border: 1px solid var(--border);
  background: rgba(15, 31, 58, 0.6);
  padding: 1rem 1.5rem;
  box-shadow: var(--shadow-card), 0 0 60px rgba(33, 150, 243, 0.08);
}

@media (min-width: 640px) {
  .demo-card {
    padding: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .hero-right {
    padding-left: 2rem;
  }
}

.demo-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.demo-status {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.demo-dot {
  width: 0.625rem;
  height: 0.625rem;
  border-radius: 50%;
  background: var(--brand-bright);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(33, 150, 243, 0.4);
  }

  50% {
    opacity: 0.7;
    box-shadow: 0 0 0 8px rgba(33, 150, 243, 0);
  }
}

.demo-status-text {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--brand-bright);
}

.demo-subtitle {
  font-size: 0.6875rem;
  color: var(--text-muted);
}

/* Chat bubbles */
.chat-messages {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.chat-msg {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}

.chat-avatar {
  margin-top: 0.25rem;
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.625rem;
  font-weight: 600;
  flex-shrink: 0;
}

.chat-avatar--user {
  background: var(--bg-card-hover);
  color: var(--text-secondary);
}

.chat-avatar--ai {
  background: rgba(33, 150, 243, 0.15);
  border: 1px solid rgba(100, 181, 246, 0.4);
  color: var(--brand-bright);
}

.chat-sender {
  font-size: 0.75rem;
  margin-bottom: 0.125rem;
}

.chat-sender--user {
  color: var(--text-muted);
}

.chat-sender--ai {
  color: var(--brand-bright);
}

.chat-text {
  font-size: 0.8125rem;
  color: var(--text-primary);
  line-height: 1.5;
}

/* Demo stats strip */
.demo-stats {
  margin-top: 0.75rem;
  border-radius: 1rem;
  border: 1px solid var(--border);
  background: rgba(10, 22, 40, 0.8);
  padding: 0.5rem 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.demo-stats-label {
  font-size: 0.6875rem;
  color: var(--text-muted);
}

.demo-stats-value {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.demo-stats-badge {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--brand-bright);
}

.demo-footnote {
  margin-top: 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── Section Base ── */
.section {
  border-bottom: 1px solid var(--border);
}

.section--alt {
  background: rgba(10, 22, 40, 0.5);
}

.section-inner {
  padding: 3.5rem 0;
}

@media (min-width: 640px) {
  .section-inner {
    padding: 4rem 0;
  }
}

.section-header {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

@media (min-width: 640px) {
  .section-header {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
  }
}

.section-title {
  font-size: 1.25rem;
  color: var(--text-primary);
}

@media (min-width: 640px) {
  .section-title {
    font-size: 1.5rem;
  }
}

.section-desc {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  max-width: 36rem;
}

/* ── Solution Cards ── */
.solutions-grid {
  display: grid;
  gap: 1.5rem;
}

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

@media (min-width: 1280px) {
  .solutions-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.solution-card {
  border-radius: 1rem;
  border: 1px solid var(--border);
  background: rgba(15, 31, 58, 0.5);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

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

.solution-card:hover {
  border-color: rgba(33, 150, 243, 0.3);
  background: rgba(15, 31, 58, 0.7);
  transform: translateY(-2px);
  box-shadow: var(--shadow-brand);
}

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

.solution-card h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.solution-card p {
  margin-top: 0.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.solution-card ul {
  list-style: none;
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.solution-card li {
  font-size: 0.75rem;
  color: var(--text-muted);
  padding-left: 1rem;
  position: relative;
}

.solution-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--brand);
}

/* ── Industries Grid ── */
.industries-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .industries-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.industries-grid h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.industries-grid p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.industries-grid h3+p+h3 {
  margin-top: 1.25rem;
}

/* Callout box */
.callout-box {
  margin-top: 1.25rem;
  border-radius: 1rem;
  border: 1px solid rgba(33, 150, 243, 0.25);
  background: rgba(33, 150, 243, 0.04);
  padding: 0.75rem;
}

.callout-box .callout-label {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--brand-bright);
  margin-bottom: 0.25rem;
}

.callout-box .callout-text {
  font-size: 0.75rem;
  color: var(--brand-light);
  line-height: 1.5;
}

/* ── Steps / How it works ── */
.steps-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .steps-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.step-card {
  display: flex;
  flex-direction: column;
  border-radius: 1rem;
  border: 1px solid var(--border);
  background: rgba(15, 31, 58, 0.5);
  padding: 1rem;
  transition: all 0.3s ease;
  position: relative;
}

.step-card:hover {
  border-color: rgba(33, 150, 243, 0.3);
  transform: translateY(-2px);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-deep), var(--brand));
  font-size: 0.6875rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.75rem;
  box-shadow: 0 0 16px rgba(33, 150, 243, 0.2);
}

.step-card h3 {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
}

.step-card p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Benefits ── */
.benefits-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .benefits-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.benefit-card {
  border-radius: 1rem;
  border: 1px solid var(--border);
  background: rgba(15, 31, 58, 0.5);
  padding: 1.25rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.benefit-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand), var(--brand-bright));
  opacity: 0;
  transition: opacity 0.3s;
}

.benefit-card:hover {
  transform: translateY(-3px);
  border-color: rgba(33, 150, 243, 0.3);
  box-shadow: var(--shadow-brand);
}

.benefit-card:hover::after {
  opacity: 1;
}

.benefit-value {
  font-family: 'Outfit', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--brand), var(--brand-bright));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.benefit-label {
  margin-top: 0.25rem;
  font-size: 0.6875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.benefit-desc {
  margin-top: 0.75rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ── Contact Section ── */
.contact-section {
  background: var(--bg-deep);
}

.contact-grid {
  display: grid;
  gap: 2.5rem;
}

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

.contact-info h2 {
  font-size: 1.25rem;
  color: var(--text-primary);
}

@media (min-width: 640px) {
  .contact-info h2 {
    font-size: 1.5rem;
  }
}

.contact-info>p {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  max-width: 28rem;
}

.contact-details {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.contact-details dt {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
}

.contact-details dd {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0;
}

.contact-details dd a {
  color: var(--text-muted);
  transition: color 0.2s ease, opacity 0.2s ease;
}

.contact-details dd a:hover {
  color: var(--brand-bright);
}



/* Utilities */
.hidden,
[hidden] {
  display: none !important;
}

/* Form */
.contact-form-wrap {
  border-radius: 1rem;
  border: 1px solid var(--border);
  background: rgba(15, 31, 58, 0.6);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow-card);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

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

@media (min-width: 640px) {
  .form-row {
    grid-template-columns: 1fr 1fr;
  }
}

.form-group label {
  display: block;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0.375rem;
}

.form-group label .required {
  color: var(--brand-bright);
}

.form-input,
.form-textarea {
  width: 100%;
  border-radius: 0.75rem;
  border: 1px solid var(--border);
  background: var(--bg-primary);
  padding: 0.5rem 0.75rem;
  font-size: 0.8125rem;
  font-family: 'Inter', sans-serif;
  color: var(--text-primary);
  outline: none;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--text-muted);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.15);
}

.form-textarea {
  resize: vertical;
  min-height: 5rem;
}

.form-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding-top: 0.5rem;
}

.form-note {
  font-size: 0.6875rem;
  color: var(--text-muted);
  max-width: 16rem;
}

.btn-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 9999px;
  background: linear-gradient(135deg, var(--brand), var(--brand-bright));
  padding: 0.5rem 1.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: #fff;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(33, 150, 243, 0.25);
  transition: all 0.3s ease;
}

.btn-submit:hover {
  transform: scale(1.03);
  box-shadow: 0 8px 24px rgba(33, 150, 243, 0.35);
}

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

/* Success message */
.form-success {
  display: none;
  text-align: center;
  padding: 2rem 1rem;
}

.form-success.is-visible {
  display: block;
}

.form-success-icon {
  width: 3rem;
  height: 3rem;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand), var(--brand-bright));
  display: flex;
  align-items: center;
  justify-content: center;
}

.form-success-icon svg {
  width: 1.5rem;
  height: 1.5rem;
  color: #fff;
}

.form-success h3 {
  font-size: 1.125rem;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.form-success p {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ── Footer ── */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-deep);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 1.5rem 0;
  font-size: 0.75rem;
  color: var(--text-muted);
}

@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
  }
}

/* ── Scroll Reveal Animation ── */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ── Particle Background ── */
.particles-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* ── Gradient Line Divider ── */
.gradient-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--brand), transparent);
  border: none;
  margin: 0;
}