/* ==============================================
   Ethicube — Design System
   Technology & Management Consultancy
   ============================================== */

/* --- CSS Custom Properties --- */
:root {
  /* Brand */
  --color-brand: #0a3276;
  --color-brand-light: #0d4299;
  --color-brand-muted: #e8f0fa;
  --color-accent: #0072f5;

  /* Neutrals */
  --color-black: #171717;
  --color-white: #ffffff;
  --color-gray-900: #1a1a2e;
  --color-gray-700: #4a4a5a;
  --color-gray-600: #5c5c6e;
  --color-gray-500: #6b6b7b;
  --color-gray-400: #999999;
  --color-gray-300: #c0c0c8;
  --color-gray-200: #e4e4ea;
  --color-gray-100: #f2f2f5;
  --color-gray-50: #fafafb;

  /* Shadows — shadow-as-border technique */
  --shadow-border: 0px 0px 0px 1px rgba(0, 0, 0, 0.08);
  --shadow-card: 0px 0px 0px 1px rgba(0, 0, 0, 0.06),
    0px 2px 4px rgba(0, 0, 0, 0.04),
    0px 8px 16px -8px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0px 0px 0px 1px rgba(0, 0, 0, 0.08),
    0px 4px 8px rgba(0, 0, 0, 0.06),
    0px 12px 24px -8px rgba(0, 0, 0, 0.10);

  /* Typography */
  --font-sans: "Geist", system-ui, -apple-system, "Segoe UI", Roboto,
    sans-serif;
  --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, Monaco,
    Consolas, "Liberation Mono", "Courier New", monospace;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 128px;

  /* Radii */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-pill: 9999px;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 64px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-gray-700);
  background: var(--color-white);
}

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

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

a:hover {
  color: var(--color-brand-light);
}

/* --- Typography --- */
h1,
h2,
h3,
h4 {
  font-family: var(--font-sans);
  color: var(--color-black);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.04em;
  font-feature-settings: "liga" 1;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  letter-spacing: -0.05em;
  line-height: 1.05;
}

h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  letter-spacing: -0.04em;
}

h3 {
  font-size: 1.5rem;
  letter-spacing: -0.03em;
}

h4 {
  font-size: 1.125rem;
  letter-spacing: -0.02em;
}

.text-large {
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--color-gray-600);
}

.text-muted {
  color: var(--color-gray-500);
}

.text-mono {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-brand);
}

/* --- Layout --- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.section {
  padding: var(--space-10) 0;
}

.section-sm {
  padding: var(--space-8) 0;
}

/* --- Navigation --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0px 0px 0px 1px rgba(0, 0, 0, 0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-black);
  letter-spacing: -0.03em;
  text-decoration: none;
}

.nav-logo:hover {
  color: var(--color-black);
}

.nav-logo-icon {
  width: 32px;
  height: 32px;
  background: var(--color-brand);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: 700;
  font-size: 1rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-600);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
  padding: var(--space-1) 0;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-black);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-white);
  background: var(--color-black);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-out);
}

.nav-cta:hover {
  background: var(--color-brand);
  color: var(--color-white);
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: var(--space-2);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-black);
  border-radius: 1px;
  transition: transform var(--duration-normal) var(--ease-out),
    opacity var(--duration-fast) var(--ease-out);
}

/* --- Hero --- */
.hero {
  padding: var(--space-10) 0 var(--space-9);
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-brand);
  background: var(--color-brand-muted);
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-5);
}

.hero h1 {
  max-width: 800px;
  margin: 0 auto var(--space-5);
}

.hero p {
  max-width: 600px;
  margin: 0 auto var(--space-7);
  font-size: 1.25rem;
  line-height: 1.7;
  color: var(--color-gray-600);
}

.hero-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-out);
  line-height: 1;
}

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

.btn-primary:hover {
  background: var(--color-brand);
  color: var(--color-white);
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-black);
  box-shadow: var(--shadow-border);
}

.btn-secondary:hover {
  background: var(--color-gray-100);
  color: var(--color-black);
}

/* --- Cards --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-5);
}

.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--duration-normal) var(--ease-out),
    transform var(--duration-normal) var(--ease-out);
}

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

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-brand-muted);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  font-size: 1.25rem;
}

.card h3 {
  margin-bottom: var(--space-2);
}

.card p {
  color: var(--color-gray-600);
  line-height: 1.6;
}

/* --- Section Headers --- */
.section-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.section-header .text-mono {
  display: block;
  margin-bottom: var(--space-3);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  max-width: 560px;
  margin: 0 auto;
  color: var(--color-gray-600);
}

/* --- Service Detail --- */
.service-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
  padding: var(--space-8) 0;
}

.service-block.reverse {
  direction: rtl;
}

.service-block.reverse > * {
  direction: ltr;
}

.service-block-content h2 {
  margin-bottom: var(--space-4);
}

.service-block-content p {
  color: var(--color-gray-600);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.service-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.service-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  color: var(--color-gray-700);
  line-height: 1.5;
}

.service-list li::before {
  content: "";
  display: block;
  width: 6px;
  height: 6px;
  min-width: 6px;
  margin-top: 10px;
  background: var(--color-brand);
  border-radius: 50%;
}

.service-block-visual {
  background: var(--color-gray-100);
  border-radius: var(--radius-xl);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-border);
  overflow: hidden;
}

.service-svg {
  width: 100%;
  height: 100%;
  max-width: 100%;
}

.service-block-visual .placeholder-text {
  color: var(--color-gray-400);
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

/* --- About --- */
.about-intro {
  max-width: 720px;
  margin: 0 auto var(--space-8);
  text-align: center;
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-5);
}

.value-item {
  text-align: center;
  padding: var(--space-5);
}

.value-item .value-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-4);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-brand-muted);
  border-radius: 50%;
  font-size: 1.5rem;
}

.value-item h4 {
  margin-bottom: var(--space-2);
}

.value-item p {
  color: var(--color-gray-600);
  font-size: 0.9375rem;
}

/* --- Contact --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: start;
}

.contact-info h2 {
  margin-bottom: var(--space-4);
}

.contact-info p {
  color: var(--color-gray-600);
  margin-bottom: var(--space-6);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-detail {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

.contact-detail-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-brand-muted);
  border-radius: var(--radius-md);
  font-size: 1rem;
  flex-shrink: 0;
}

.contact-detail-text strong {
  display: block;
  color: var(--color-black);
  font-weight: 500;
  margin-bottom: 2px;
}

/* --- Form --- */
.form {
  background: var(--color-white);
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-black);
  margin-bottom: 6px;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--color-black);
  background: var(--color-white);
  border: none;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-border);
  transition: box-shadow var(--duration-fast) var(--ease-out);
  outline: none;
}

.form-input:focus,
.form-textarea:focus {
  box-shadow: 0px 0px 0px 2px var(--color-accent);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-gray-400);
}

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

.form-submit {
  width: 100%;
  padding: 14px 24px;
  font-size: 1rem;
}

.form-success {
  display: none;
  text-align: center;
  padding: var(--space-6);
}

.form-success.show {
  display: block;
}

.form-success-icon {
  font-size: 3rem;
  margin-bottom: var(--space-3);
}

.form-success h3 {
  margin-bottom: var(--space-2);
}

/* --- Footer --- */
.footer {
  background: var(--color-gray-900);
  color: var(--color-gray-400);
  padding: var(--space-8) 0 var(--space-6);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-7);
  margin-bottom: var(--space-7);
}

.footer-brand p {
  margin-top: var(--space-3);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.footer h4 {
  color: var(--color-white);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-4);
  letter-spacing: 0;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-links a {
  color: var(--color-gray-400);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: var(--space-5);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
}

/* --- Utility --- */
.divider {
  width: 100%;
  height: 1px;
  background: var(--color-gray-200);
  margin: var(--space-9) 0;
}

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

.mt-4 {
  margin-top: var(--space-4);
}

.mt-6 {
  margin-top: var(--space-6);
}

/* --- Page Header (non-home pages) --- */
.page-header {
  padding: var(--space-9) 0 var(--space-7);
  text-align: center;
}

.page-header h1 {
  margin-bottom: var(--space-3);
}

.page-header p {
  max-width: 560px;
  margin: 0 auto;
  color: var(--color-gray-600);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --nav-height: 56px;
  }

  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    flex-direction: column;
    padding: var(--space-5);
    gap: var(--space-4);
    box-shadow: 0px 4px 12px rgba(0, 0, 0, 0.08);
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: var(--space-7) 0 var(--space-7);
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .service-block {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .service-block.reverse {
    direction: ltr;
  }

  .service-block-visual {
    aspect-ratio: 16/9;
  }

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

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

  .section {
    padding: var(--space-8) 0;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.75rem;
  }

  .hero p {
    font-size: 1.0625rem;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-2);
    text-align: center;
  }

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

/* --- Animations --- */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.6s var(--ease-out) both;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}