/* ============================================================
   HC WEB CO. — STYLESHEET
   Professional Websites for Small Businesses
   ============================================================ */

/* -------------------------------------------------------
   1. CSS CUSTOM PROPERTIES (Design Tokens)
------------------------------------------------------- */
:root {
  /* Brand Colors */
  --color-primary:       #1e3a5f;   /* Dark navy */
  --color-accent:        #2563eb;   /* Bright blue */
  --color-accent-hover:  #1d4ed8;
  --color-accent-light:  #eff6ff;   /* Tint for cards/badges */

  /* Backgrounds */
  --color-bg:            #ffffff;
  --color-bg-alt:        #f8fafc;
  --color-bg-card:       #ffffff;

  /* Text */
  --color-text:          #1a1a2e;
  --color-text-muted:    #64748b;
  --color-text-light:    #94a3b8;

  /* Borders */
  --color-border:        #e2e8f0;

  /* Nav */
  --nav-bg:              rgba(255, 255, 255, 0.96);
  --nav-height:          68px;

  /* Footer */
  --footer-bg:           #0f172a;
  --footer-text:         #cbd5e1;

  /* Typography */
  --font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;

  /* Spacing */
  --max-w:               1100px;
  --section-y:           5rem;

  /* Shape */
  --radius-sm:    8px;
  --radius-md:    12px;
  --radius-lg:    20px;
  --radius-full:  9999px;

  /* Shadows */
  --shadow-sm:   0 1px 4px rgba(0, 0, 0, 0.07);
  --shadow-md:   0 4px 16px rgba(0, 0, 0, 0.09);
  --shadow-lg:   0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-card: 0 2px 12px rgba(30, 58, 95, 0.08);

  /* Transitions */
  --ease: 0.25s ease;
  --ease-slow: 0.4s ease;
}

/* -------------------------------------------------------
   2. DARK MODE TOKENS
------------------------------------------------------- */
[data-theme="dark"] {
  --color-bg:          #0f172a;
  --color-bg-alt:      #1e293b;
  --color-bg-card:     #1e293b;

  --color-text:        #f1f5f9;
  --color-text-muted:  #94a3b8;
  --color-text-light:  #64748b;

  --color-border:      #334155;
  --color-accent-light: #1e3560;

  --nav-bg:            rgba(15, 23, 42, 0.97);

  --shadow-sm:   0 1px 4px rgba(0, 0, 0, 0.3);
  --shadow-md:   0 4px 16px rgba(0, 0, 0, 0.35);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.3);
}

/* -------------------------------------------------------
   3. RESET & BASE
------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  transition: background-color var(--ease-slow), color var(--ease-slow);
  overflow-x: hidden;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--ease);
}

a:hover, a:focus-visible {
  color: var(--color-accent-hover);
}

ul {
  list-style: none;
}

/* Focus ring for keyboard users */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* -------------------------------------------------------
   4. LAYOUT UTILITIES
------------------------------------------------------- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: var(--section-y) 1.5rem;
}

.section-alt {
  background-color: var(--color-bg-alt);
}

/* -------------------------------------------------------
   5. SECTION HEADERS
------------------------------------------------------- */
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  background-color: var(--color-accent-light);
  padding: 0.3rem 0.85rem;
  border-radius: var(--radius-full);
  margin-bottom: 0.85rem;
}

.section-header h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  transition: color var(--ease-slow);
}

[data-theme="dark"] .section-header h2 {
  color: var(--color-text);
}

.section-desc {
  max-width: 600px;
  margin: 1rem auto 0;
  color: var(--color-text-muted);
  font-size: 1.05rem;
}

/* -------------------------------------------------------
   6. BUTTONS
------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.6rem;
  border-radius: var(--radius-md);
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background-color var(--ease), color var(--ease), border-color var(--ease), transform var(--ease), box-shadow var(--ease);
  text-decoration: none;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn:active {
  transform: translateY(0);
}

/* Primary */
.btn-primary {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

.btn-primary:hover, .btn-primary:focus-visible {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #ffffff;
}

/* Secondary (ghost) */
.btn-secondary {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-secondary:hover, .btn-secondary:focus-visible {
  background-color: var(--color-accent);
  color: #ffffff;
}

/* Outline */
.btn-outline {
  background-color: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-outline:hover, .btn-outline:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: var(--color-accent-light);
}

.btn-submit {
  width: 100%;
  padding: 0.9rem;
  font-size: 1rem;
}

/* -------------------------------------------------------
   7. NAVBAR
------------------------------------------------------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background-color: var(--nav-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--ease), box-shadow var(--ease), background-color var(--ease-slow);
}

.navbar.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav-logo img {
  height: 48px;
  width: auto;
  object-fit: contain;
  transition: opacity var(--ease);
}

.nav-logo:hover img {
  opacity: 0.85;
}

/* Desktop Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-links a {
  color: var(--color-text);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color var(--ease), background-color var(--ease);
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a.active {
  color: var(--color-accent);
  background-color: var(--color-accent-light);
}

/* Dark Mode Toggle */
.dark-toggle {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.45rem;
  cursor: pointer;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--ease), border-color var(--ease), background-color var(--ease);
  width: 38px;
  height: 38px;
}

.dark-toggle:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background-color: var(--color-accent-light);
}

.dark-toggle svg {
  width: 18px;
  height: 18px;
  transition: opacity var(--ease);
}

.icon-moon { display: none; }

[data-theme="dark"] .icon-sun  { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 8px;
  transition: border-color var(--ease);
}

.hamburger:hover {
  border-color: var(--color-accent);
}

.hamburger span {
  display: block;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--ease), opacity var(--ease), background-color var(--ease-slow);
}

/* Hamburger → X animation */
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* -------------------------------------------------------
   8. HERO SECTION
------------------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-height) + 3rem) 1.5rem 4rem;
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
}

.hero-container {
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-primary);
  background-color: var(--color-accent-light);
  border: 1px solid rgba(37, 99, 235, 0.2);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-full);
  margin-bottom: 1.25rem;
}

[data-theme="dark"] .badge {
  color: #93c5fd;
  background-color: rgba(37, 99, 235, 0.15);
  border-color: rgba(37, 99, 235, 0.3);
}

/* Hero Heading */
.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
  transition: color var(--ease-slow);
}

[data-theme="dark"] .hero h1 {
  color: var(--color-text);
}

.hero-sub {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 520px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* Hero Logo */
.hero-logo {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-logo img {
  width: 100%;
  max-width: 380px;
  filter: drop-shadow(0 12px 40px rgba(37, 99, 235, 0.18));
  transition: filter var(--ease-slow);
}

[data-theme="dark"] .hero-logo img {
  filter: drop-shadow(0 12px 40px rgba(37, 99, 235, 0.3)) brightness(0.95);
}

/* -------------------------------------------------------
   9. ABOUT SECTION
------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: start;
}

.about-text p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 1.25rem;
}

.veteran-badge {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background-color: var(--color-accent-light);
  border: 1px solid rgba(37, 99, 235, 0.15);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.25rem;
  margin-top: 0.5rem;
}

[data-theme="dark"] .veteran-badge {
  background-color: rgba(37, 99, 235, 0.1);
  border-color: rgba(37, 99, 235, 0.25);
}

.veteran-flag {
  font-size: 1.6rem;
  flex-shrink: 0;
  line-height: 1;
  margin-top: 0.1rem;
}

.veteran-badge strong {
  display: block;
  font-size: 0.95rem;
  color: var(--color-primary);
  margin-bottom: 0.2rem;
}

[data-theme="dark"] .veteran-badge strong {
  color: #93c5fd;
}

.veteran-badge span {
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

/* Value Cards */
.about-values {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.value-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-card);
  transition: transform var(--ease), box-shadow var(--ease), background-color var(--ease-slow), border-color var(--ease-slow);
}

.value-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.value-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  background-color: var(--color-accent-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
}

.value-icon svg {
  width: 22px;
  height: 22px;
}

.value-card h3 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.2rem;
  transition: color var(--ease-slow);
}

[data-theme="dark"] .value-card h3 {
  color: var(--color-text);
}

.value-card p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* -------------------------------------------------------
   10. SERVICES SECTION
------------------------------------------------------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.service-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow-card);
  transition: transform var(--ease), box-shadow var(--ease), background-color var(--ease-slow), border-color var(--ease-slow);
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: rgba(37, 99, 235, 0.3);
}

.service-icon {
  width: 50px;
  height: 50px;
  background-color: var(--color-accent-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  margin-bottom: 1.1rem;
}

.service-icon svg {
  width: 24px;
  height: 24px;
}

.service-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 0.6rem;
  transition: color var(--ease-slow);
}

[data-theme="dark"] .service-card h3 {
  color: var(--color-text);
}

.service-card p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* -------------------------------------------------------
   11. PRICING SECTION
------------------------------------------------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.pricing-card {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow-card);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  position: relative;
  transition: transform var(--ease), box-shadow var(--ease), background-color var(--ease-slow), border-color var(--ease-slow);
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.pricing-featured {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2), var(--shadow-md);
}

.featured-label {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #fff;
  background-color: var(--color-accent);
  padding: 0.25rem 0.8rem;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.pricing-icon {
  width: 52px;
  height: 52px;
  background-color: var(--color-accent-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  margin-bottom: 0.4rem;
}

.pricing-icon svg {
  width: 24px;
  height: 24px;
}

.pricing-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  transition: color var(--ease-slow);
}

[data-theme="dark"] .pricing-card h3 {
  color: var(--color-text);
}

.price-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
}

.price-from {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

.price-amount {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
}

.price-period {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.pricing-card p {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  flex-grow: 1;
}

.pricing-note {
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  max-width: 560px;
  margin: 0 auto;
}

/* -------------------------------------------------------
   12. CONTACT SECTION
------------------------------------------------------- */
.contact-wrapper {
  max-width: 720px;
  margin: 0 auto;
}

.contact-form {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  transition: background-color var(--ease-slow), border-color var(--ease-slow);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.form-group-full {
  grid-column: 1 / -1;
}

label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-text);
  transition: color var(--ease-slow);
}

.required {
  color: #ef4444;
}

input, select, textarea {
  font-family: var(--font);
  font-size: 0.95rem;
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.7rem 1rem;
  transition: border-color var(--ease), box-shadow var(--ease), background-color var(--ease-slow), color var(--ease-slow);
  width: 100%;
}

input::placeholder, textarea::placeholder {
  color: var(--color-text-light);
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

input.error, textarea.error {
  border-color: #ef4444;
}

textarea {
  resize: vertical;
  min-height: 130px;
}

select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2364748b' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

/* Form status messages */
.form-status {
  font-size: 0.9rem;
  text-align: center;
  padding: 0.75rem;
  border-radius: var(--radius-md);
  display: none;
}

.form-status.success {
  display: block;
  background-color: #d1fae5;
  color: #065f46;
  border: 1px solid #6ee7b7;
}

.form-status.error {
  display: block;
  background-color: #fee2e2;
  color: #991b1b;
  border: 1px solid #fca5a5;
}

[data-theme="dark"] .form-status.success {
  background-color: rgba(6, 95, 70, 0.3);
  color: #6ee7b7;
  border-color: rgba(110, 231, 183, 0.3);
}

[data-theme="dark"] .form-status.error {
  background-color: rgba(153, 27, 27, 0.3);
  color: #fca5a5;
  border-color: rgba(252, 165, 165, 0.3);
}

/* -------------------------------------------------------
   14. FOOTER
------------------------------------------------------- */
.footer {
  background-color: var(--footer-bg);
  color: var(--footer-text);
}

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 3.5rem 1.5rem 2rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: start;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

/* Footer Brand */
.footer-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-logo {
  height: 50px;
  width: auto;
  object-fit: contain;
  opacity: 0.9;
}

.footer-brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.footer-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: #f1f5f9;
}

.footer-tagline {
  font-size: 0.82rem;
  color: var(--footer-text);
  opacity: 0.75;
}

/* Footer Nav */
.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  align-items: center;
}

.footer-nav a {
  font-size: 0.9rem;
  color: var(--footer-text);
  opacity: 0.75;
  transition: opacity var(--ease), color var(--ease);
}

.footer-nav a:hover {
  opacity: 1;
  color: #ffffff;
}

/* Footer Social */
.footer-social {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  align-items: flex-start;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--footer-text);
  transition: background-color var(--ease), color var(--ease), transform var(--ease);
}

.social-link:hover {
  background-color: var(--color-accent);
  color: #ffffff;
  transform: translateY(-2px);
}

/* Footer Bottom */
.footer-bottom {
  padding-top: 1.75rem;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: var(--footer-text);
  opacity: 0.5;
}

/* -------------------------------------------------------
   15. FADE-IN ANIMATIONS
------------------------------------------------------- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-delay {
  transition-delay: 0.15s;
}

/* -------------------------------------------------------
   16. MOBILE NAVIGATION
------------------------------------------------------- */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.5rem 1.5rem;
    gap: 0.25rem;
    transform: translateY(-110%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
    box-shadow: var(--shadow-md);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-links a {
    padding: 0.7rem 0.75rem;
    font-size: 1rem;
  }

  .dark-toggle {
    width: 100%;
    justify-content: flex-start;
    gap: 0.6rem;
    padding: 0.7rem 0.75rem;
    border: none;
    border-radius: var(--radius-sm);
  }

  .dark-toggle::after {
    content: 'Toggle Dark Mode';
    font-size: 1rem;
    font-weight: 500;
  }
}

/* -------------------------------------------------------
   17. RESPONSIVE — TABLET (max 900px)
------------------------------------------------------- */
@media (max-width: 900px) {
  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }

  .hero-content {
    order: 1;
  }

  .hero-logo {
    order: 0;
  }

  .hero-logo img {
    max-width: 260px;
    margin: 0 auto;
  }

  .hero-sub {
    margin: 0 auto 2rem;
  }

  .hero-buttons {
    justify-content: center;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

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

  .footer-top {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2rem;
  }

  .footer-brand {
    justify-content: center;
  }

  .footer-nav {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }

  .footer-social {
    justify-content: center;
  }
}

/* -------------------------------------------------------
   18. RESPONSIVE — MOBILE (max 600px)
------------------------------------------------------- */
@media (max-width: 600px) {
  :root {
    --section-y: 3.5rem;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 1.75rem 1.25rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    font-size: 2rem;
  }
}