/* ========================================
   10zen — Design System & Styles
   ======================================== */

/* ---------- Custom Properties ---------- */
:root {
  /* Palette */
  --clr-navy-900: #0a1120;
  --clr-navy-800: #0f1b2d;
  --clr-navy-700: #162340;
  --clr-navy-600: #1e3055;
  --clr-navy-500: #2a4270;

  --clr-amber-500: #f0a500;
  --clr-amber-400: #f5b731;
  --clr-amber-300: #fad06a;
  --clr-amber-glow: rgba(240, 165, 0, 0.15);

  --clr-cream: #faf8f4;
  --clr-white: #ffffff;
  --clr-gray-100: #f3f4f6;
  --clr-gray-200: #e5e7eb;
  --clr-gray-400: #9ca3af;
  --clr-gray-600: #6b7280;
  --clr-gray-800: #1f2937;

  /* Typography */
  --ff-heading: 'Outfit', sans-serif;
  --ff-body: 'Inter', sans-serif;

  --fs-xs: 0.8125rem;   /* 13px */
  --fs-sm: 0.875rem;     /* 14px */
  --fs-base: 1rem;       /* 16px */
  --fs-md: 1.125rem;     /* 18px */
  --fs-lg: 1.25rem;      /* 20px */
  --fs-xl: 1.5rem;       /* 24px */
  --fs-2xl: 2rem;        /* 32px */
  --fs-3xl: 2.5rem;      /* 40px */
  --fs-4xl: 3.25rem;     /* 52px */

  /* Spacing */
  --sp-xs: 0.5rem;
  --sp-sm: 0.75rem;
  --sp-md: 1rem;
  --sp-lg: 1.5rem;
  --sp-xl: 2rem;
  --sp-2xl: 3rem;
  --sp-3xl: 4rem;
  --sp-4xl: 6rem;

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

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.10);
  --shadow-card: 0 2px 12px rgba(0,0,0,0.06);
  --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.12);

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --duration: 0.3s;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--ff-body);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--clr-gray-800);
  background: var(--clr-white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sp-lg);
}

/* ---------- Typography Helpers ---------- */
.section-label {
  font-family: var(--ff-heading);
  font-size: var(--fs-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--clr-amber-500);
  margin-bottom: var(--sp-sm);
}

.section-title {
  font-family: var(--ff-heading);
  font-size: var(--fs-3xl);
  font-weight: 700;
  line-height: 1.2;
  color: var(--clr-navy-800);
  margin-bottom: var(--sp-md);
}

.section-desc {
  font-size: var(--fs-md);
  color: var(--clr-gray-600);
  max-width: 600px;
}

.section-header {
  text-align: center;
  margin-bottom: var(--sp-3xl);
}

.section-header .section-desc {
  margin: 0 auto;
}

.highlight {
  color: var(--clr-amber-500);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  font-family: var(--ff-heading);
  font-weight: 600;
  font-size: var(--fs-base);
  padding: 0.85em 1.8em;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--duration) var(--ease);
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--clr-amber-500);
  color: var(--clr-navy-900);
  border-color: var(--clr-amber-500);
}

.btn--primary:hover {
  background: var(--clr-amber-400);
  border-color: var(--clr-amber-400);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(240, 165, 0, 0.35);
}

.btn--outline {
  background: transparent;
  color: var(--clr-navy-800);
  border-color: var(--clr-navy-600);
}

.btn--outline:hover {
  background: var(--clr-navy-800);
  color: var(--clr-white);
  border-color: var(--clr-navy-800);
  transform: translateY(-2px);
}

.btn--sm { font-size: var(--fs-sm); padding: 0.6em 1.4em; }
.btn--lg { font-size: var(--fs-md); padding: 1em 2.2em; }

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: var(--sp-md) 0;
  transition: all var(--duration) var(--ease);
  background: rgba(255, 255, 255, 0.01);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  padding: var(--sp-sm) 0;
}

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

.navbar__logo {
  font-family: var(--ff-heading);
  font-size: var(--fs-xl);
  font-weight: 800;
  color: var(--clr-navy-900);
  letter-spacing: -0.5px;
}

.navbar.scrolled .navbar__logo {
  color: var(--clr-navy-800);
}

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

.navbar__links a {
  font-family: var(--ff-body);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--clr-gray-600);
}

.navbar.scrolled .navbar__links a {
  color: var(--clr-gray-600);
}

.navbar__links a:hover {
  color: var(--clr-amber-500);
}

.navbar__cta-item .btn {
  color: var(--clr-navy-900);
}

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

.navbar__toggle span {
  width: 24px;
  height: 2px;
  background: var(--clr-navy-900);
  border-radius: 2px;
  transition: all var(--duration) var(--ease);
}

.navbar.scrolled .navbar__toggle span {
  background: var(--clr-navy-800);
}

/* ========================================
   HERO
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--clr-white);
  padding: 120px 0 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 80%;
  height: 160%;
  background: radial-gradient(ellipse at center, var(--clr-amber-glow) 0%, transparent 65%);
  pointer-events: none;
  opacity: 0.5;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--sp-3xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero__badge {
  display: inline-block;
  font-family: var(--ff-heading);
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--clr-amber-600);
  background: var(--clr-amber-glow);
  padding: 0.5em 1.2em;
  border-radius: var(--radius-full);
  margin-bottom: var(--sp-lg);
  border: 1px solid rgba(240, 165, 0, 0.2);
}

.hero__title {
  font-family: var(--ff-heading);
  font-size: var(--fs-4xl);
  font-weight: 800;
  line-height: 1.15;
  color: var(--clr-navy-900);
  margin-bottom: var(--sp-lg);
}

.hero__subtitle {
  font-size: var(--fs-md);
  color: var(--clr-gray-600);
  line-height: 1.8;
  max-width: 520px;
  margin-bottom: var(--sp-xl);
}

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

.hero__actions .btn--outline {
  color: var(--clr-navy-800);
  border-color: var(--clr-gray-200);
}

.hero__actions .btn--outline:hover {
  background: var(--clr-navy-800);
  color: var(--clr-white);
  border-color: var(--clr-navy-800);
}

/* Hero Visual */
.hero__visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__glow {
  position: absolute;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--clr-amber-glow), transparent 70%);
  filter: blur(40px);
  animation: glow-pulse 4s ease-in-out infinite;
}

@keyframes glow-pulse {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.1); }
}

.hero__icon-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-md);
  position: relative;
  z-index: 1;
}

.hero__icon-card {
  background: var(--clr-white);
  border: 1px solid var(--clr-gray-200);
  border-radius: var(--radius-md);
  padding: var(--sp-xl) var(--sp-lg);
  text-align: center;
  transition: all var(--duration) var(--ease);
  box-shadow: var(--shadow-sm);
}

.hero__icon-card:hover {
  background: var(--clr-white);
  transform: translateY(-4px);
  border-color: var(--clr-amber-400);
  box-shadow: var(--shadow-md);
}

.hero__icon-card span {
  font-size: 2.5rem;
  display: block;
  margin-bottom: var(--sp-xs);
}

.hero__icon-card p {
  font-family: var(--ff-heading);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--clr-navy-800);
  letter-spacing: 0.5px;
}

/* ========================================
   SERVICES
   ======================================== */
.services {
  padding: var(--sp-4xl) 0;
  background: var(--clr-cream);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-xl);
}

.service-card {
  background: var(--clr-white);
  border-radius: var(--radius-lg);
  padding: var(--sp-2xl);
  border: 1px solid var(--clr-gray-200);
  transition: all var(--duration) var(--ease);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--clr-amber-500), var(--clr-amber-300));
  opacity: 0;
  transition: opacity var(--duration) var(--ease);
}

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

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

.service-card__icon {
  font-size: 2.5rem;
  margin-bottom: var(--sp-md);
}

.service-card__title {
  font-family: var(--ff-heading);
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--clr-navy-800);
  margin-bottom: var(--sp-sm);
}

.service-card__desc {
  font-size: var(--fs-base);
  color: var(--clr-gray-600);
  line-height: 1.7;
  margin-bottom: var(--sp-lg);
}

.service-card__details {
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
  padding-top: var(--sp-md);
  border-top: 1px solid var(--clr-gray-100);
}

.service-card__detail {
  display: flex;
  gap: var(--sp-sm);
  font-size: var(--fs-sm);
}

.service-card__detail strong {
  color: var(--clr-navy-800);
  min-width: 80px;
  flex-shrink: 0;
}

.service-card__detail span {
  color: var(--clr-gray-600);
}

/* ========================================
   CASE STUDIES
   ======================================== */
.case-studies {
  padding: var(--sp-4xl) 0;
  background: var(--clr-white);
}

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

.case-card {
  background: var(--clr-white);
  border-radius: var(--radius-lg);
  padding: var(--sp-2xl);
  border: 1px solid var(--clr-gray-200);
  transition: all var(--duration) var(--ease);
  display: flex;
  flex-direction: column;
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: transparent;
}

.case-card__tag {
  display: inline-block;
  align-self: flex-start;
  font-family: var(--ff-heading);
  font-size: var(--fs-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--clr-amber-500);
  background: var(--clr-amber-glow);
  padding: 0.35em 1em;
  border-radius: var(--radius-full);
  margin-bottom: var(--sp-md);
}

.case-card__title {
  font-family: var(--ff-heading);
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--clr-navy-800);
  margin-bottom: var(--sp-md);
  line-height: 1.3;
}

.case-card__challenge,
.case-card__outcome {
  font-size: var(--fs-sm);
  color: var(--clr-gray-600);
  margin-bottom: var(--sp-sm);
  line-height: 1.7;
}

.case-card__challenge strong,
.case-card__outcome strong {
  color: var(--clr-navy-800);
}

.case-card__service {
  margin-top: auto;
  padding-top: var(--sp-md);
  border-top: 1px solid var(--clr-gray-100);
  font-family: var(--ff-heading);
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--clr-gray-400);
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* ========================================
   FOUNDER
   ======================================== */
.founder {
  padding: var(--sp-4xl) 0;
  background: var(--clr-cream);
}

.founder__inner {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--sp-3xl);
  align-items: center;
}

.founder__photo-placeholder {
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--clr-navy-700), var(--clr-navy-800));
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--ff-heading);
  font-size: var(--fs-3xl);
  font-weight: 700;
  color: var(--clr-amber-400);
  border: 4px solid var(--clr-amber-500);
  box-shadow: 0 0 0 8px var(--clr-amber-glow);
}

.founder__quote {
  font-family: var(--ff-body);
  font-size: var(--fs-md);
  font-style: italic;
  color: var(--clr-navy-700);
  line-height: 1.8;
  margin-bottom: var(--sp-lg);
  padding-left: var(--sp-lg);
  border-left: 3px solid var(--clr-amber-500);
}

.founder__bio {
  font-size: var(--fs-base);
  color: var(--clr-gray-600);
  line-height: 1.8;
}

/* ========================================
   CTA BANNER
   ======================================== */
.cta-banner {
  padding: var(--sp-4xl) 0;
  background: linear-gradient(135deg, var(--clr-navy-900), var(--clr-navy-700));
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -30%;
  left: -10%;
  width: 60%;
  height: 160%;
  background: radial-gradient(ellipse, var(--clr-amber-glow), transparent 65%);
  pointer-events: none;
}

.cta-banner__inner {
  text-align: center;
  position: relative;
  z-index: 1;
}

.cta-banner__title {
  font-family: var(--ff-heading);
  font-size: var(--fs-3xl);
  font-weight: 700;
  color: var(--clr-white);
  margin-bottom: var(--sp-md);
}

.cta-banner__desc {
  font-size: var(--fs-md);
  color: rgba(255, 255, 255, 0.7);
  max-width: 560px;
  margin: 0 auto var(--sp-xl);
  line-height: 1.8;
}

.cta-banner__contact {
  margin-top: var(--sp-lg);
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.5);
}

.cta-banner__contact a {
  color: var(--clr-amber-400);
}

.cta-banner__contact a:hover {
  color: var(--clr-amber-300);
  text-decoration: underline;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background: var(--clr-navy-900);
  padding: var(--sp-3xl) 0 var(--sp-xl);
  color: rgba(255, 255, 255, 0.6);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: var(--sp-3xl);
  padding-bottom: var(--sp-2xl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer__logo {
  font-family: var(--ff-heading);
  font-size: var(--fs-xl);
  font-weight: 800;
  color: var(--clr-white);
  display: inline-block;
  margin-bottom: var(--sp-sm);
}

.footer__tagline {
  font-size: var(--fs-sm);
  max-width: 280px;
  line-height: 1.7;
}

.footer__links h4,
.footer__social h4 {
  font-family: var(--ff-heading);
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--clr-white);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: var(--sp-md);
}

.footer__links ul {
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
}

.footer__links a {
  font-size: var(--fs-sm);
  color: rgba(255, 255, 255, 0.6);
}

.footer__links a:hover {
  color: var(--clr-amber-400);
}

.footer__social-links {
  display: flex;
  gap: var(--sp-md);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--duration) var(--ease);
}

.social-link:hover {
  background: var(--clr-amber-500);
  color: var(--clr-navy-900);
  transform: translateY(-2px);
}

.footer__bottom {
  padding-top: var(--sp-xl);
  display: flex;
  flex-direction: column;
  gap: var(--sp-sm);
  font-size: var(--fs-xs);
  color: rgba(255, 255, 255, 0.35);
}

.footer__disclaimer {
  max-width: 700px;
  line-height: 1.7;
  font-size: 0.75rem;
}

/* ========================================
   ANIMATIONS
   ======================================== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

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

/* Stagger children */
.services__grid .fade-in:nth-child(2) { transition-delay: 0.1s; }
.services__grid .fade-in:nth-child(3) { transition-delay: 0.2s; }
.services__grid .fade-in:nth-child(4) { transition-delay: 0.3s; }

.cases__grid .fade-in:nth-child(2) { transition-delay: 0.1s; }
.cases__grid .fade-in:nth-child(3) { transition-delay: 0.2s; }

/* ========================================
   RESPONSIVE
   ======================================== */

/* Tablet */
@media (max-width: 1024px) {
  .hero__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__subtitle {
    margin: 0 auto var(--sp-xl);
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__visual {
    display: none;
  }

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

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

  .founder__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .founder__photo {
    display: flex;
    justify-content: center;
  }

  .founder__quote {
    border-left: none;
    padding-left: 0;
    border-top: 3px solid var(--clr-amber-500);
    padding-top: var(--sp-md);
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--sp-xl);
  }
}

/* Mobile */
@media (max-width: 768px) {
  .hero__title {
    font-size: var(--fs-2xl);
  }

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

  .cta-banner__title {
    font-size: var(--fs-2xl);
  }

  .navbar__toggle {
    display: flex;
  }

  .navbar__links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 80px var(--sp-xl) var(--sp-xl);
    background: var(--clr-navy-900);
    transition: right var(--duration) var(--ease);
    gap: var(--sp-lg);
    box-shadow: -4px 0 30px rgba(0, 0, 0, 0.3);
  }

  .navbar__links.open {
    right: 0;
  }

  .navbar__links a {
    font-size: var(--fs-base);
    color: rgba(255, 255, 255, 0.85) !important;
  }

  .navbar__toggle.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .navbar__toggle.open span:nth-child(2) {
    opacity: 0;
  }

  .navbar__toggle.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .service-card {
    padding: var(--sp-xl);
  }

  .case-card {
    padding: var(--sp-xl);
  }

  .founder__photo-placeholder {
    width: 140px;
    height: 140px;
    font-size: var(--fs-2xl);
  }
}