/* style.css — LSX Solution Design Tokens & Components */

/* =============================================
   FONTS — Cabinet Grotesk (display) + Satoshi (body) from Fontshare
   ============================================= */
@import url('https://api.fontshare.com/v2/css?f[]=cabinet-grotesk@400,500,700,800&f[]=satoshi@400,500,700&display=swap');

/* =============================================
   DESIGN TOKENS
   ============================================= */
:root {
  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Helvetica Neue', sans-serif;

  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* Spacing (4px base) */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* =============================================
   DARK THEME (default)
   ============================================= */
:root, [data-theme="dark"] {
  --color-bg:           #0a0a0f;
  --color-surface:      #0f0f18;
  --color-surface-2:    #141422;
  --color-border:       rgba(0, 168, 255, 0.12);
  --color-border-strong: rgba(0, 168, 255, 0.25);
  --color-divider:      rgba(255, 255, 255, 0.06);
  --color-text:         #e8eaed;
  --color-text-muted:   #8b8fa3;
  --color-text-faint:   #4a4e63;
  --color-primary:      #00a8ff;
  --color-primary-hover: #33bbff;
  --color-primary-active: #0090dd;
  --color-primary-glow: rgba(0, 168, 255, 0.15);
  --color-primary-glow-strong: rgba(0, 168, 255, 0.3);
  --color-white:        #ffffff;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(0, 168, 255, 0.15);

  color-scheme: dark;
}

/* =============================================
   LIGHT THEME
   ============================================= */
[data-theme="light"] {
  --color-bg:           #f5f7fa;
  --color-surface:      #ffffff;
  --color-surface-2:    #eef1f6;
  --color-border:       rgba(0, 90, 160, 0.12);
  --color-border-strong: rgba(0, 90, 160, 0.25);
  --color-divider:      rgba(0, 0, 0, 0.06);
  --color-text:         #0a0a1a;
  --color-text-muted:   #546178;
  --color-text-faint:   #9aa5b8;
  --color-primary:      #0075cc;
  --color-primary-hover: #005fa8;
  --color-primary-active: #004d8a;
  --color-primary-glow: rgba(0, 117, 204, 0.08);
  --color-primary-glow-strong: rgba(0, 117, 204, 0.15);
  --color-white:        #ffffff;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 30px rgba(0, 117, 204, 0.08);

  color-scheme: light;
}

/* =============================================
   LAYOUT
   ============================================= */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

@media (min-width: 768px) {
  .container { padding-inline: var(--space-8); }
}

section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}

/* =============================================
   HEADER / NAV
   ============================================= */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-divider);
  transition: background 300ms ease, box-shadow 300ms ease;
}

[data-theme="light"] .header {
  background: rgba(245, 247, 250, 0.85);
}

.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4.5rem;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.header__logo-img {
  height: 52px;
  width: auto;
  object-fit: contain;
}

/* Theme-based logo switching: dark mode shows logo-dark, light mode shows logo-light */
:root .logo-light, [data-theme="dark"] .logo-light { display: none; }
:root .logo-dark, [data-theme="dark"] .logo-dark { display: block; }
[data-theme="light"] .logo-light { display: block; }
[data-theme="light"] .logo-dark { display: none; }

.header__nav {
  display: none;
  align-items: center;
  gap: var(--space-8);
}

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

.header__nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  position: relative;
  padding-block: var(--space-1);
}

.header__nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 300ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

.header__nav a:hover::after {
  width: 100%;
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  background: transparent;
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-primary-glow);
}

/* Mobile menu toggle */
.mobile-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  color: var(--color-text-muted);
}

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

.mobile-toggle:hover { color: var(--color-text); }

/* Mobile nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: 4.5rem;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  padding: var(--space-8);
  z-index: 99;
  flex-direction: column;
  gap: var(--space-6);
}

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

.mobile-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  padding-block: var(--space-2);
  border-bottom: 1px solid var(--color-divider);
}

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

/* =============================================
   HERO
   ============================================= */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 4.5rem;
}

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

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.5;
}

.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(10, 10, 15, 0.3) 0%,
    rgba(10, 10, 15, 0.6) 50%,
    rgba(10, 10, 15, 0.95) 100%
  );
}

[data-theme="light"] .hero__bg img {
  opacity: 0.3;
  filter: brightness(1.2) saturate(0.8);
}

[data-theme="light"] .hero__bg::after {
  background: linear-gradient(
    180deg,
    rgba(245, 247, 250, 0.3) 0%,
    rgba(245, 247, 250, 0.6) 50%,
    rgba(245, 247, 250, 0.95) 100%
  );
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  background: var(--color-primary-glow);
  border: 1px solid var(--color-border-strong);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: var(--space-6);
}

.hero__badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: 1.05;
  margin-bottom: var(--space-6);
  color: var(--color-white);
}

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

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

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: var(--space-8);
  line-height: 1.6;
}

.hero__cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  line-height: 1.4;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 20px rgba(0, 168, 255, 0.3);
}

.btn--primary:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 0 30px rgba(0, 168, 255, 0.5);
  transform: translateY(-1px);
}

.btn--primary:active {
  background: var(--color-primary-active);
  transform: translateY(0);
}

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-strong);
}

.btn--outline:hover {
  background: var(--color-primary-glow);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

/* =============================================
   SECTION HEADING
   ============================================= */
.section-header {
  text-align: center;
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.section-label::before,
.section-label::after {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--color-primary);
  opacity: 0.5;
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 600px;
  margin-inline: auto;
}

/* =============================================
   SERVICE CARDS
   ============================================= */
.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

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

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

.service-card {
  position: relative;
  padding: var(--space-8);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: border-color 300ms ease, box-shadow 300ms ease, transform 300ms ease;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  opacity: 0;
  transition: opacity 300ms ease;
}

.service-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

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

.service-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background: var(--color-primary-glow);
  color: var(--color-primary);
  margin-bottom: var(--space-5);
}

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

.service-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.service-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* =============================================
   WHY CHOOSE US
   ============================================= */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

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

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

.feature-item {
  text-align: center;
  padding: var(--space-8) var(--space-6);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: border-color 300ms ease, transform 300ms ease;
}

.feature-item:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-2px);
}

.feature-item__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-primary-glow);
  color: var(--color-primary);
  margin: 0 auto var(--space-5);
}

.feature-item__icon svg {
  width: 24px;
  height: 24px;
}

.feature-item h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.feature-item p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 280px;
  margin-inline: auto;
}

/* =============================================
   ABOUT SECTION
   ============================================= */
.about {
  position: relative;
}

.about__content {
  max-width: 800px;
  margin-inline: auto;
  text-align: center;
}

.about__content p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-inline: auto;
}

.about__content p + p {
  margin-top: var(--space-4);
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-12);
  max-width: 600px;
  margin-inline: auto;
}

@media (min-width: 640px) {
  .about__stats { grid-template-columns: repeat(4, 1fr); }
}

.stat {
  text-align: center;
}

.stat__number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.stat__label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* =============================================
   CONTACT SECTION
   ============================================= */
.contact {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-12);
}

@media (min-width: 768px) {
  .contact__grid {
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-16);
  }
}

.contact__info h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
}

.contact__info > p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-8);
}

.contact__detail {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-divider);
}

.contact__detail-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--color-primary-glow);
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact__detail-icon svg {
  width: 20px;
  height: 20px;
}

.contact__detail-text strong {
  display: block;
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.contact__detail-text span, 
.contact__detail-text a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}

.contact__detail-text a:hover {
  color: var(--color-primary);
}

/* Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-5);
}

@media (min-width: 480px) {
  .form-row { grid-template-columns: 1fr 1fr; }
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-group label {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
}

.form-group input,
.form-group textarea {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: var(--text-sm);
}

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

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-glow);
}

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

/* =============================================
   FOOTER
   ============================================= */
.footer {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-divider);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
}

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

.footer__left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.footer__logo-img {
  height: 36px;
  width: auto;
  object-fit: contain;
}

.footer__right {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

@media (min-width: 768px) {
  .footer__right { align-items: flex-end; }
}

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

.footer__attribution a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color 180ms ease;
}

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

/* =============================================
   SCROLL ANIMATIONS
   ============================================= */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 600ms cubic-bezier(0.16, 1, 0.3, 1),
              transform 600ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Stagger children */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 500ms cubic-bezier(0.16, 1, 0.3, 1),
              transform 500ms cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-stagger.is-visible > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.is-visible > *:nth-child(2) { transition-delay: 100ms; }
.reveal-stagger.is-visible > *:nth-child(3) { transition-delay: 200ms; }
.reveal-stagger.is-visible > *:nth-child(4) { transition-delay: 300ms; }

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

/* =============================================
   UTILITIES
   ============================================= */
.text-gradient {
  background: linear-gradient(135deg, var(--color-primary), #66d4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Subtle divider line */
.divider {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), transparent);
  margin: var(--space-6) auto;
}

/* =============================================
   REDUCED MOTION
   ============================================= */
@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .reveal-stagger > * {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .hero__badge::before {
    animation: none;
  }
}