/* ============================================
   TechQuest Digital — Design System & Styles
   ============================================ */

/* --- Custom Properties --- */
:root {
  /* Colors — Navy/Slate palette with warm accent */
  --color-primary: #1a2332;
  --color-primary-light: #243044;
  --color-primary-lighter: #2d3d56;
  --color-secondary: #0f6b5e;
  --color-secondary-light: #12856f;
  --color-secondary-pale: #e8f5f2;
  --color-accent: #0f6b5e;

  --color-text: #1a2332;
  --color-text-secondary: #5a6578;
  --color-text-tertiary: #8a94a6;
  --color-text-inverse: #ffffff;

  --color-bg: #ffffff;
  --color-bg-warm: #f8f7f5;
  --color-bg-cool: #f1f3f6;
  --color-bg-dark: #1a2332;
  --color-bg-dark-alt: #141c28;

  --color-border: #e2e5ea;
  --color-border-light: #eef0f3;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.25rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  --font-size-4xl: 3.25rem;
  --font-size-5xl: 4rem;

  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-tight: 1.15;
  --line-height-snug: 1.3;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;

  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.05em;
  --letter-spacing-wider: 0.1em;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  /* Layout */
  --container-max: 1200px;
  --container-padding: 1.5rem;
  --section-padding: 6rem;

  /* Borders */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(26, 35, 50, 0.06);
  --shadow-md: 0 4px 12px rgba(26, 35, 50, 0.08);
  --shadow-lg: 0 8px 30px rgba(26, 35, 50, 0.1);
  --shadow-xl: 0 16px 50px rgba(26, 35, 50, 0.12);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}


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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

address {
  font-style: normal;
}


/* --- Layout --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}


/* --- Section Common --- */
.section-header {
  max-width: 640px;
  margin-bottom: var(--space-3xl);
}

.section-label {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: var(--space-md);
}

.section-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
}

.section-subtitle {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}


/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.875rem 2rem;
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wide);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-secondary);
  color: var(--color-text-inverse);
}

.btn--primary:hover {
  background-color: var(--color-secondary-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn--secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-border);
}

.btn--secondary:hover {
  border-color: var(--color-primary);
  background-color: var(--color-bg-cool);
}

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


/* ============================================
   Navigation
   ============================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

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

.nav__container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-md);
  color: var(--color-primary);
}

.nav__logo-img {
  height: 52px;
  width: auto;
  display: block;
}

.nav__logo-img--footer {
  height: 46px;
  filter: brightness(0) invert(1);
}

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

.nav__link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  position: relative;
  transition: color var(--transition-fast);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-secondary);
  transition: width var(--transition-base);
}

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

.nav__link--active::after,
.nav__link:hover::after {
  width: 100%;
}

.nav__link--cta {
  background-color: var(--color-secondary);
  color: var(--color-text-inverse) !important;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
}

.nav__link--cta::after {
  display: none;
}

.nav__link--cta:hover {
  background-color: var(--color-secondary-light);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-fast);
}


/* ============================================
   Hero
   ============================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background-color: var(--color-bg-warm);
  position: relative;
  overflow: hidden;
  padding-top: 72px;
}

.hero__container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-4xl) var(--container-padding);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero__label {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: var(--space-lg);
  padding: var(--space-xs) var(--space-md);
  background: var(--color-secondary-pale);
  border-radius: 100px;
}

.hero__title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
  color: var(--color-primary);
  margin-bottom: var(--space-xl);
}

.hero__subtitle {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-2xl);
  max-width: 520px;
}

.hero__actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Hero abstract shapes */
.hero__visual {
  position: relative;
  width: 100%;
  height: 480px;
}

.hero__shape {
  position: absolute;
  border-radius: var(--radius-xl);
}

.hero__shape--1 {
  width: 320px;
  height: 320px;
  background: linear-gradient(145deg, var(--color-secondary-pale) 0%, rgba(15, 107, 94, 0.12) 100%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-12deg);
  border-radius: 40px;
}

.hero__shape--2 {
  width: 200px;
  height: 200px;
  border: 2px solid var(--color-border);
  top: 10%;
  right: 5%;
  transform: rotate(15deg);
  border-radius: 32px;
}

.hero__shape--3 {
  width: 120px;
  height: 120px;
  background-color: var(--color-primary);
  opacity: 0.06;
  bottom: 15%;
  left: 10%;
  transform: rotate(25deg);
  border-radius: 24px;
}


/* ============================================
   About
   ============================================ */
.about {
  padding: var(--section-padding) 0;
  background-color: var(--color-bg);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: start;
}

.about__text--lead {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-xl);
}

.about__text {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-lg);
}

.about__values {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.about__value {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
  padding: var(--space-xl);
  background: var(--color-bg-warm);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
}

.about__value-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-secondary-pale);
  color: var(--color-secondary);
  border-radius: var(--radius-md);
}

.about__value-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.about__value-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
}


/* ============================================
   Services
   ============================================ */
.services {
  padding: var(--section-padding) 0;
  background-color: var(--color-bg-warm);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.service-card {
  padding: var(--space-2xl);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.service-card__number {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-secondary-pale);
  line-height: 1;
  margin-bottom: var(--space-xl);
  /* A subtle large numeral watermark feel */
  background: linear-gradient(180deg, var(--color-secondary) 0%, rgba(15, 107, 94, 0.2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.service-card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  line-height: var(--line-height-snug);
}

.service-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: var(--space-xl);
  flex-grow: 1;
}

.service-card__points {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border-light);
}

.service-card__points li {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  padding-left: var(--space-lg);
  position: relative;
}

.service-card__points li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-secondary);
  opacity: 0.5;
}


/* ============================================
   Industries
   ============================================ */
.industries {
  padding: var(--section-padding) 0;
  background-color: var(--color-bg);
}

.industries__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.industry-card {
  padding: var(--space-2xl);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.industry-card:hover {
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-md);
}

.industry-card__icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-warm);
  border-radius: var(--radius-md);
  color: var(--color-secondary);
  margin-bottom: var(--space-xl);
}

.industry-card__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.industry-card__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}


/* ============================================
   Contact
   ============================================ */
.contact {
  padding: var(--section-padding) 0;
  background-color: var(--color-bg-dark);
}

.contact .section-label {
  color: var(--color-secondary-light);
}

.contact .section-title {
  color: var(--color-text-inverse);
}

.contact .section-subtitle {
  color: var(--color-text-tertiary);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4xl);
  align-items: start;
}

/* Form */
.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: rgba(255, 255, 255, 0.7);
}

.form-input {
  padding: 0.875rem var(--space-md);
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary-lighter);
  border-radius: var(--radius-md);
  color: var(--color-text-inverse);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

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

.form-input:focus {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(15, 107, 94, 0.2);
}

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

.contact__form-note {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  text-align: center;
  margin-top: var(--space-xs);
}

/* Contact info */
.contact__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
  padding-top: var(--space-lg);
}

.contact__info-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.contact__info-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  color: var(--color-text-tertiary);
}

.contact__info-value {
  font-size: var(--font-size-md);
  color: var(--color-text-inverse);
  transition: color var(--transition-fast);
}

a.contact__info-value:hover {
  color: var(--color-secondary-light);
}

.contact__info-address {
  line-height: var(--line-height-relaxed);
}


/* ============================================
   Footer
   ============================================ */
.footer {
  background-color: var(--color-bg-dark-alt);
  padding: var(--space-3xl) 0;
  border-top: 1px solid var(--color-primary-lighter);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3xl);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid var(--color-primary-lighter);
}

.footer__brand {
  max-width: 320px;
}

.footer .nav__logo {
  margin-bottom: var(--space-md);
}

.footer .nav__logo-icon {
  color: var(--color-secondary);
}

.footer .nav__logo-text {
  color: var(--color-text-inverse);
}

.footer__tagline {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  line-height: var(--line-height-relaxed);
}

.footer__links {
  display: flex;
  gap: var(--space-4xl);
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__col-title {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-sm);
}

.footer__link {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--transition-fast);
}

a.footer__link:hover {
  color: var(--color-text-inverse);
}

.footer__link--static {
  cursor: default;
}

.footer__bottom {
  padding-top: var(--space-xl);
}

.footer__copyright {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}


/* ============================================
   Form Success State
   ============================================ */
.form-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: var(--space-lg);
  padding: var(--space-3xl);
  background: var(--color-primary-light);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-primary-lighter);
}

.form-success__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(15, 107, 94, 0.15);
  border-radius: 50%;
  color: var(--color-secondary-light);
}

.form-success__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-inverse);
}

.form-success__text {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  line-height: var(--line-height-relaxed);
}


/* ============================================
   Form Validation Errors
   ============================================ */
.form-input--error {
  border-color: #c44e4e;
}

.form-error {
  font-size: var(--font-size-xs);
  color: #e06060;
  margin-top: -2px;
}


/* ============================================
   Responsive — Tablet
   ============================================ */
@media (max-width: 1024px) {
  :root {
    --section-padding: 4.5rem;
  }

  .hero__container {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .hero__visual {
    display: none;
  }

  .hero__title {
    font-size: var(--font-size-3xl);
  }

  .about__grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

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

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

  .contact__grid {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
}


/* ============================================
   Responsive — Mobile
   ============================================ */
@media (max-width: 768px) {
  :root {
    --section-padding: 3.5rem;
    --container-padding: 1.25rem;
  }

  .section-title {
    font-size: var(--font-size-2xl);
  }

  .hero {
    min-height: auto;
    padding-top: 72px;
  }

  .hero__container {
    padding: var(--space-3xl) var(--container-padding);
  }

  .hero__title {
    font-size: var(--font-size-2xl);
  }

  .hero__subtitle {
    font-size: var(--font-size-base);
  }

  /* Nav mobile */
  .nav__links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--color-bg);
    padding: 80px var(--space-xl) var(--space-xl);
    box-shadow: var(--shadow-xl);
    transition: right var(--transition-slow);
    z-index: 999;
  }

  .nav__links--open {
    right: 0;
  }

  .nav__link {
    display: block;
    padding: var(--space-md) 0;
    font-size: var(--font-size-base);
    border-bottom: 1px solid var(--color-border-light);
    width: 100%;
  }

  .nav__link::after {
    display: none;
  }

  .nav__link--cta {
    margin-top: var(--space-lg);
    text-align: center;
    border-bottom: none;
    padding: 0.75rem 1.25rem;
  }

  .nav__toggle {
    display: flex;
    z-index: 1001;
  }

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

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

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

  /* Mobile overlay */
  .nav__overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 35, 50, 0.5);
    z-index: 998;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-slow);
  }

  .nav__overlay--active {
    opacity: 1;
    pointer-events: auto;
  }

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

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

  .footer__inner {
    flex-direction: column;
  }

  .footer__links {
    gap: var(--space-2xl);
  }
}


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

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