/* ============================================
   CSS VARIABLES & DESIGN TOKENS
   ============================================ */

:root {
  /* Colors */
  --color-black: #000000;
  --color-white: #ffffff;
  --color-gray-light: #f5f5f5;
  --color-gray-dark: #1a1a1a;
  --color-blue-deep: #1a3a52;
  --color-blue-soft: #2d5a7a;
  --color-cyan: #4a9ab0;
  --color-text: #e5e5e5;
  --color-text-dark: #2a2a2a;

  /* Typography */
  --font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", sans-serif;
  --font-size-body: 1.1rem;
  --font-size-small: 0.95rem;
  --line-height: 1.6;
  --letter-spacing: 0.3px;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* Border Radius System */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  /* Transitions */
  --transition-fast: 200ms ease;
  --transition-normal: 400ms ease;
  --transition-slow: 600ms ease;

  /* Shadow - Premium soft shadows */
  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.25);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.3);

  /* Social Icon Colors */
  --icon-muted: rgba(74, 154, 176, 0.5);
  --icon-hover: #4a9ab0;
  --icon-glow: rgba(74, 154, 176, 0.15);

  /* Layout */
  --header-height: 88px;
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  line-height: var(--line-height);
  color: var(--color-text);
  background-color: var(--color-black);
  letter-spacing: var(--letter-spacing);
  overflow-x: hidden;
}

/* Respect motion preferences */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.5px;
}

h1 {
  font-size: clamp(40px, 4.6vw, 64px);
  margin-bottom: 0;
  color: var(--color-white);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 5vw, 2.8rem);
  margin-bottom: var(--spacing-lg);
  color: var(--color-white);
  text-align: center;
}

h3 {
  font-size: 1.4rem;
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

p:last-child {
  margin-bottom: 0;
}

@media (max-width: 900px) {
  p:last-child {
    margin-left: auto;
    margin-right: auto;
  }
}

a {
  color: var(--color-cyan);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-white);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
  text-decoration: none;
  font-family: var(--font-family);
  letter-spacing: var(--letter-spacing);
}

.btn-primary {
  background-color: var(--color-cyan);
  color: var(--color-black);
  border-color: var(--color-cyan);
}

.btn-primary:hover {
  background-color: transparent;
  color: var(--color-cyan);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-cyan);
  border-color: var(--color-cyan);
}

.btn-secondary:hover {
  background-color: var(--color-cyan);
  color: var(--color-black);
}

/* ============================================
   NAVIGATION
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 1000;
  background-color: rgba(0, 0, 0, 0.75);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(45, 90, 122, 0.3);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.3);
  padding: var(--spacing-md) 0;
  will-change: transform;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.5px;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
}

.nav-link {
  color: var(--color-text);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-cyan);
}

.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 5px;
  background: none;
  border: none;
  padding: 0;
}

.hamburger span {
  width: 25px;
  height: 2px;
  background-color: var(--color-white);
  transition: all var(--transition-fast);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(10px, 10px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

@media (max-width: 768px) {
  .hamburger {
    display: flex;
    z-index: 1002;
  }

  .nav-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    flex-direction: column;
    background-color: var(--color-black);
    gap: 0;
    max-height: 100vh;
    overflow-y: auto;
    transition:
      opacity 300ms ease,
      visibility 300ms ease;
    border-bottom: none;
    opacity: 0;
    visibility: hidden;
    padding-top: 80px;
    z-index: 1001;
  }

  .nav-menu::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition:
      opacity 300ms ease,
      visibility 300ms ease;
    z-index: -1;
  }

  .nav-menu.active {
    opacity: 1;
    visibility: visible;
  }

  .nav-menu.active::before {
    opacity: 1;
    visibility: visible;
  }

  .nav-menu li {
    padding: var(--spacing-md) var(--spacing-md);
    border-bottom: 1px solid rgba(45, 90, 122, 0.1);
    min-height: 56px;
    display: flex;
    align-items: center;
  }

  .nav-menu li:last-child {
    border-bottom: none;
  }

  .nav-menu li a {
    font-size: 1.1rem;
    width: 100%;
    padding: var(--spacing-sm) 0;
  }

  body.menu-open {
    overflow: hidden;
  }
}

/* ============================================
   MAIN CONTENT
   ============================================ */

main {
  margin-top: var(--header-height);
}

/* ============================================
   LAYOUT
   ============================================ */

.section-container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

section {
  padding: var(--spacing-xl) 0;
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
}

section:nth-child(2) {
  animation-delay: 0s;
}

section:nth-child(n + 3) {
  animation-delay: calc((var(--index, 0) - 2) * 0.1s);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  section {
    opacity: 1;
    animation: none;
  }
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(56px, 8vh, 96px) var(--spacing-md) clamp(40px, 7vh, 88px);
  overflow: hidden;
  min-height: calc(100vh - var(--header-height));
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  grid-template-rows: auto auto;
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
  max-width: 1200px;
  width: 100%;
  height: 100%;
  min-height: calc(100vh - var(--header-height));
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    var(--color-black) 0%,
    var(--color-blue-deep) 100%
  );
  z-index: -1;
}

.hero-background::before {
  content: "";
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(
    circle,
    rgba(74, 154, 176, 0.15) 0%,
    transparent 70%
  );
  border-radius: 50%;
  top: -200px;
  right: -200px;
}

.hero-background::after {
  content: "";
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(
    circle,
    rgba(45, 90, 122, 0.1) 0%,
    transparent 70%
  );
  border-radius: 50%;
  bottom: -100px;
  left: -100px;
}

.hero-content {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 24px;
  grid-column: 1;
  grid-row: 1;
}

.hero-subtitle {
  font-size: clamp(16px, 1.2vw, 18px);
  color: var(--color-text);
  margin-bottom: 0;
  line-height: 1.6;
  max-width: 52ch;
}

.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  margin-top: 8px;
  grid-column: 1;
  grid-row: 2;
}

.hero-image-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  max-width: 520px;
  width: 100%;
  grid-column: 2;
  grid-row: 1 / 3;
}

.hero-image {
  max-width: 100%;
  max-height: 75vh;
  width: 100%;
  height: auto;
  object-fit: cover;
  object-position: center center;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: block;
}

@media (max-width: 900px) {
  h1 {
    font-size: clamp(34px, 9vw, 48px);
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: clamp(32px, 6vh, 48px);
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .hero-content {
    text-align: center;
    order: 1;
  }

  .hero-image-wrapper {
    order: 2;
    max-width: 100%;
  }

  .hero-cta {
    justify-content: center;
    order: 3;
    margin-top: 12px;
  }
}

@media (max-width: 640px) {
  .hero {
    min-height: auto;
    padding: clamp(32px, 4vh, 48px) var(--spacing-md);
  }

  .hero-inner {
    gap: var(--spacing-lg);
  }

  .hero-cta {
    flex-direction: column;
    gap: 16px;
    width: 100%;
    max-width: 360px;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta .btn {
    width: 100%;
    padding: 1.1rem 2rem;
  }

  .btn {
    width: 100%;
  }
}

/* ============================================
   PHILOSOPHY SECTION
   ============================================ */

.philosophy {
  background: linear-gradient(to bottom, transparent, rgba(45, 90, 122, 0.05));
}

.philosophy-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.philosophy-content p {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--color-text);
}

.philosophy-content p:first-child {
  border-left: 3px solid var(--color-cyan);
  padding-left: var(--spacing-md);
}

/* ============================================
   FOCUS AREAS SECTION
   ============================================ */

.focus {
  background: transparent;
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.focus-card {
  padding: var(--spacing-lg);
  background: rgba(45, 90, 122, 0.1);
  border: 1px solid rgba(74, 154, 176, 0.2);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.focus-card:hover {
  background: rgba(45, 90, 122, 0.15);
  border-color: rgba(74, 154, 176, 0.4);
  transform: translateY(-4px);
}

.focus-card h3 {
  color: var(--color-cyan);
  margin-bottom: var(--spacing-md);
}

.focus-card p {
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .focus-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   APPROACH SECTION
   ============================================ */

.approach {
  background: transparent;
}

.approach-principles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.principle {
  padding: var(--spacing-lg);
  position: relative;
  border-left: 3px solid var(--color-cyan);
  padding-left: var(--spacing-lg);
}

.principle-number {
  position: absolute;
  left: -20px;
  top: 0;
  width: 40px;
  height: 40px;
  background: var(--color-cyan);
  color: var(--color-black);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
  border-radius: 50%;
}

.principle h3 {
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
}

.principle p {
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .approach-principles {
    grid-template-columns: 1fr;
  }

  .principle {
    border-left: none;
    padding-left: var(--spacing-lg);
  }
}

/* ============================================
   ABOUT SECTION
   ============================================ */

.about {
  background: rgba(45, 90, 122, 0.05);
}

.about-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
  margin-top: var(--spacing-lg);
}

.about-content {
  text-align: left;
}

.about-content p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: var(--spacing-lg);
}

.about-content p:last-child {
  margin-bottom: 0;
}

.about-image-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-image {
  max-width: 100%;
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  display: block;
}

@media (max-width: 900px) {
  .about-wrapper {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .about-content {
    text-align: center;
  }
}

@media (max-width: 640px) {
  .about-wrapper {
    gap: var(--spacing-md);
  }

  .about-content p {
    font-size: 1rem;
  }
}

/* ============================================
   CONTACT SECTION
   ============================================ */

.contact {
  background: transparent;
}

.contact-intro {
  text-align: center;
  font-size: 1.15rem;
  color: var(--color-text);
  margin-bottom: var(--spacing-lg);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-lg);
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

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

.form-group label {
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-white);
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
  padding: var(--spacing-md);
  background-color: rgba(45, 90, 122, 0.1);
  border: 1px solid rgba(74, 154, 176, 0.2);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  font-family: var(--font-family);
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(229, 229, 229, 0.4);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  background-color: rgba(45, 90, 122, 0.15);
  border-color: var(--color-cyan);
  box-shadow: 0 0 0 3px rgba(74, 154, 176, 0.1);
}

.error-message {
  color: #ff6b6b;
  font-size: 0.85rem;
  margin-top: 4px;
  min-height: 20px;
}

.form-group.error input,
.form-group.error textarea {
  border-color: #ff6b6b;
  background-color: rgba(255, 107, 107, 0.05);
}

.form-success {
  display: none;
  padding: var(--spacing-md);
  background-color: rgba(74, 154, 176, 0.1);
  border: 1px solid var(--color-cyan);
  border-radius: var(--radius-sm);
  text-align: center;
  color: var(--color-cyan);
}

.form-success.show {
  display: block;
  animation: fadeInUp 0.4s ease;
}

.form-error {
  display: none;
  padding: var(--spacing-md);
  background-color: rgba(255, 107, 107, 0.1);
  border: 1px solid #ff6b6b;
  border-radius: var(--radius-sm);
  text-align: center;
  color: #ff6b6b;
}

.form-error.show {
  display: block;
  animation: fadeInUp 0.4s ease;
}

.form-error p,
.form-success p {
  margin: 0;
}

/* Honeypot field - hidden from users */
.honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

/* Button loading state */
.btn-loading {
  display: none;
}

.btn.loading {
  pointer-events: none;
  opacity: 0.7;
}

.btn.loading .btn-text {
  display: none;
}

.btn.loading .btn-loading {
  display: inline;
}

.contact-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.contact-info p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-text);
}

.contact-info a {
  color: var(--color-cyan);
  font-weight: 600;
  transition: color var(--transition-fast);
}

.contact-info a:hover {
  color: var(--color-white);
}

@media (max-width: 768px) {
  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .contact-info {
    order: -1;
    text-align: center;
  }
}

/* ============================================
   SOCIAL SECTION
   ============================================ */

.social {
  background: var(--color-black);
  border-top: 1px solid rgba(74, 154, 176, 0.1);
  padding: var(--spacing-xl) var(--spacing-md);
}

.social-intro {
  text-align: center;
  font-size: 1.05rem;
  color: var(--color-text);
  margin-bottom: var(--spacing-lg);
}

.social-links {
  display: flex;
  gap: 24px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  max-width: 500px;
  margin: 0 auto;
}

.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--icon-muted);
  text-decoration: none;
  transition:
    color 160ms ease,
    transform 160ms ease,
    filter 160ms ease;
  cursor: pointer;
  flex-shrink: 0;
}

#social .social-icon svg {
  width: 30px;
  height: 30px;
  max-width: 100%;
  max-height: 100%;
  display: block;
  fill: currentColor;
}

.social-icon:hover {
  color: var(--icon-hover);
  transform: translateY(-1px);
  filter: drop-shadow(0 0 10px var(--icon-glow));
}

.social-icon:focus {
  color: var(--icon-hover);
}

.social-icon:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 4px;
  border-radius: 2px;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .social-icon {
    transition: color 160ms ease;
  }

  .social-icon:hover {
    transform: none;
    filter: none;
  }
}

@media (max-width: 640px) {
  .social {
    padding: var(--spacing-lg) var(--spacing-md);
  }

  #social .social-icon svg {
    width: 26px;
    height: 26px;
  }
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
  background-color: var(--color-gray-dark);
  border-top: 1px solid rgba(45, 90, 122, 0.2);
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer p {
  font-size: 0.95rem;
  color: rgba(229, 229, 229, 0.6);
  margin: 0;
}

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

@media (max-width: 768px) {
  :root {
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    --font-size-body: 1rem;
  }

  section {
    padding: var(--spacing-lg) 0;
  }

  .nav-container {
    padding: 0 var(--spacing-sm);
  }

  h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
  }

  h3 {
    font-size: 1.2rem;
  }
}

@media (max-width: 480px) {
  :root {
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 3rem;
    --font-size-body: 0.95rem;
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.6rem;
  }

  section {
    padding: var(--spacing-lg) 0;
  }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

:focus-visible {
  outline: 2px solid var(--color-cyan);
  outline-offset: 2px;
}