/* =========================================
   YOURSOFTER DESIGN SYSTEM
   Enterprise Production Foundation
   ========================================= */

/* ========= CSS RESET (Modern Minimal Reset) ========= */

*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
}

button,
input,
textarea,
select {
  font: inherit;
}

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

/* ========= DESIGN TOKENS ========= */

:root {

  /* ===== Colors ===== */

  --color-primary: #0B1F3A;
  --color-secondary: #1E3A8A;
  --color-accent: #2563EB;

  --color-bg-dark: #0F172A;
  --color-bg-light: #F8FAFC;

  --color-text-primary: #0F172A;
  --color-text-secondary: #475569;

  --color-border: #E2E8F0;

  --color-success: #16A34A;
  --color-danger: #DC2626;

  /* ===== Typography ===== */

  --font-family-base: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --font-size-h1: 3rem;      /* 48px */
  --font-size-h2: 2.25rem;   /* 36px */
  --font-size-h3: 1.75rem;   /* 28px */
  --font-size-h4: 1.375rem;  /* 22px */
  --font-size-body-lg: 1.125rem; /* 18px */
  --font-size-body: 1rem;    /* 16px */
  --font-size-small: 0.875rem; /* 14px */

  --line-height-heading: 1.2;
  --line-height-body: 1.6;

  /* ===== Spacing Scale (8pt System) ===== */

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  --space-6: 48px;
  --space-7: 64px;
  --space-8: 80px;
  --space-9: 120px;

  /* ===== Layout ===== */

  --container-max-width: 1200px;
  --container-wide-width: 1440px;

  --container-padding-mobile: 16px;
  --container-padding-tablet: 24px;
  --container-padding-desktop: 32px;

  /* ===== Border Radius ===== */

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-btn: 8px;

  /* ===== Shadows ===== */

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);

  /* ===== Motion ===== */

  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 400ms ease;

}

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

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--color-text-primary);
  background-color: #ffffff;
}

h1, h2, h3, h4 {
  line-height: var(--line-height-heading);
  font-weight: 600;
}

h1 { font-size: var(--font-size-h1); }
h2 { font-size: var(--font-size-h2); }
h3 { font-size: var(--font-size-h3); }
h4 { font-size: var(--font-size-h4); }

p {
  color: var(--color-text-secondary);
}

/* ========= CONTAINER SYSTEM ========= */

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding-mobile);
  padding-right: var(--container-padding-mobile);
}

.container-wide {
  max-width: var(--container-wide-width);
}

/* Tablet */
@media (min-width: 640px) {
  .container {
    padding-left: var(--container-padding-tablet);
    padding-right: var(--container-padding-tablet);
  }
}

/* Desktop */
@media (min-width: 1024px) {
  .container {
    padding-left: var(--container-padding-desktop);
    padding-right: var(--container-padding-desktop);
  }
}

/* ========= UTILITY CLASSES ========= */

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

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

.text-accent {
  color: var(--color-accent);
}

.bg-dark {
  background-color: var(--color-bg-dark);
  color: #ffffff;
}

.bg-light {
  background-color: var(--color-bg-light);
}

.section {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}

.section-lg {
  padding-top: var(--space-9);
  padding-bottom: var(--space-9);
}

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

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation-duration: 0.01ms !important;
  }
}


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

.site-header {
  position: sticky;
  top: 0;
  width: 100%;
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

/* Logo */

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
}

/* Desktop Navigation */

.nav-desktop {
  display: none;
}

.nav-desktop ul {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
}

.nav-link {
  font-size: var(--font-size-body);
  font-weight: 500;
  color: var(--color-text-primary);
  position: relative;
  transition: var(--transition-normal);
}

.nav-link:hover {
  color: var(--color-accent);
}

.nav-link.active {
  color: var(--color-accent);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
}

/* CTA Button */

.nav-cta {
  padding: 10px 18px;
  background: var(--color-primary);
  color: #ffffff;
  border-radius: var(--radius-btn);
  transition: var(--transition-normal);
}

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

/* Mobile Toggle */

.mobile-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: var(--transition-normal);
}

/* Mobile Navigation */

.nav-mobile {
  display: none;
  background: #ffffff;
  border-top: 1px solid var(--color-border);
}

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


.nav-mobile ul {
  list-style: none;
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.mobile-link {
  font-size: var(--font-size-body-lg);
  font-weight: 500;
  color: var(--color-text-primary);
}

.mobile-cta {
  padding: 12px 16px;
  background: var(--color-primary);
  color: #ffffff;
  border-radius: var(--radius-btn);
  display: inline-block;
  text-align: center;
}

/* Show Desktop Nav */

@media (min-width: 1024px) {
  .nav-desktop {
    display: block;
  }

  .mobile-toggle {
    display: none;
  }

  .nav-mobile {
    display: none !important;
  }
}

/* Sticky Enhancement */

.site-header {
  transition: var(--transition-normal);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(6px);
}



/* =========================================
   BUTTON SYSTEM
   ========================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;

  font-weight: 600;
  font-size: var(--font-size-body);
  line-height: 1;

  padding: 12px 22px;

  border-radius: var(--radius-btn);
  border: 1px solid transparent;

  cursor: pointer;
  transition: var(--transition-normal);

  position: relative;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

/* ===== Sizes ===== */

.btn-sm {
  padding: 8px 16px;
  font-size: var(--font-size-small);
}

.btn-md {
  padding: 12px 22px;
}

.btn-lg {
  padding: 16px 28px;
  font-size: var(--font-size-body-lg);
}

/* ===== Primary ===== */

.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
}

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

/* ===== Secondary ===== */

.btn-secondary {
  background: var(--color-accent);
  color: #ffffff;
}

.btn-secondary:hover {
  background: #1d4ed8;
}

/* ===== Outline ===== */

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

.btn-outline:hover {
  background: var(--color-primary);
  color: #ffffff;
}

/* ===== Ghost ===== */

.btn-ghost {
  background: transparent;
  color: var(--color-text-primary);
}

.btn-ghost:hover {
  background: var(--color-bg-light);
}

/* ===== Danger ===== */

.btn-danger {
  background: var(--color-danger);
  color: #ffffff;
}

.btn-danger:hover {
  background: #b91c1c;
}

/* ===== Disabled State ===== */

.btn:disabled,
.btn.is-disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* ===== Loading State ===== */

.btn.is-loading {
  pointer-events: none;
  color: transparent;
}

.btn.is-loading::after {
  content: "";
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #ffffff;
  border-radius: 50%;
  position: absolute;
  animation: btn-spin 0.8s linear infinite;
}

@keyframes btn-spin {
  to { transform: rotate(360deg); }
}

/* ===== Full Width Utility ===== */

.btn-block {
  width: 100%;
}


/* =========================================
   FORM SYSTEM
   ========================================= */

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: var(--space-4);
}

.form-label {
  font-size: var(--font-size-small);
  font-weight: 600;
  color: var(--color-text-primary);
}

.form-label .required {
  color: var(--color-danger);
  margin-left: 4px;
}

.form-control {
  width: 100%;
  padding: 12px 14px;
  font-size: var(--font-size-body);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: #ffffff;
  transition: var(--transition-normal);
}

.form-control::placeholder {
  color: #94a3b8;
}

.form-control:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
  outline: none;
}

/* Textarea */

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

/* Select */

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3Csvg width='20' height='20' fill='none' stroke='%23475569' stroke-width='2' viewBox='0 0 24 24'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
}

/* Help Text */

.form-help {
  font-size: var(--font-size-small);
  color: var(--color-text-secondary);
}

/* Error State */

.form-group.has-error .form-control {
  border-color: var(--color-danger);
}

.form-group.has-error .form-control:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}

.form-error {
  font-size: var(--font-size-small);
  color: var(--color-danger);
}

/* Success State */

.form-group.has-success .form-control {
  border-color: var(--color-success);
}

.form-success {
  font-size: var(--font-size-small);
  color: var(--color-success);
}

/* Disabled */

.form-control:disabled {
  background: #f1f5f9;
  cursor: not-allowed;
}

/* Checkbox / Radio */

.form-check {
  display: flex;
  align-items: center;
  gap: 8px;
}

.form-check input {
  width: 18px;
  height: 18px;
  accent-color: var(--color-accent);
}

/* Form Grid */

.form-row {
  display: grid;
  gap: var(--space-4);
}

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


/* =========================================
   CARD SYSTEM
   ========================================= */

.card {
  background: #ffffff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

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

.card-clickable {
  cursor: pointer;
}

/* Card Header */

.card-header {
  font-weight: 600;
  font-size: var(--font-size-h4);
  color: var(--color-text-primary);
}

/* Card Body */

.card-body {
  font-size: var(--font-size-body);
  color: var(--color-text-secondary);
}

/* Card Footer */

.card-footer {
  margin-top: auto;
}

/* Card Icon */

.card-icon {
  width: 48px;
  height: 48px;
  background: var(--color-bg-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-accent);
}

/* Dark Variant */

.card-dark {
  background: var(--color-bg-dark);
  border: none;
  color: #ffffff;
}

.card-dark .card-body {
  color: #cbd5e1;
}

/* Minimal Variant */

.card-minimal {
  border: none;
  padding: 0;
  background: transparent;
}

/* Horizontal Layout */

.card-horizontal {
  flex-direction: row;
  align-items: center;
  gap: var(--space-4);
}

/* Card Grid */

.card-grid {
  display: grid;
  gap: var(--space-5);
}

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

@media (min-width: 1024px) {
  .card-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1280px) {
  .card-grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}


/* =========================================
   SECTION SYSTEM
   ========================================= */

/* Base Section */

.section {
  padding-top: var(--space-7);
  padding-bottom: var(--space-7);
}

.section-sm {
  padding-top: var(--space-5);
  padding-bottom: var(--space-5);
}

.section-lg {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

.section-xl {
  padding-top: var(--space-9);
  padding-bottom: var(--space-9);
}

/* Background Variants */

.section-dark {
  background: var(--color-bg-dark);
  color: #ffffff;
}

.section-light {
  background: var(--color-bg-light);
}

.section-bordered {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

/* Section Header */

.section-header {
  max-width: 720px;
  margin-bottom: var(--space-6);
}

.section-title {
  margin-bottom: var(--space-3);
}

.section-subtitle {
  font-size: var(--font-size-body-lg);
  color: var(--color-text-secondary);
}

/* Centered Content */

.section-center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

/* Hero Layout */

.hero {
  padding-top: var(--space-9);
  padding-bottom: var(--space-9);
}

.hero-title {
  font-size: clamp(2.2rem, 5vw, 3.2rem);
  margin-bottom: var(--space-4);
}

.hero-subtitle {
  font-size: var(--font-size-body-lg);
  max-width: 640px;
  margin-bottom: var(--space-5);
  color: var(--color-text-secondary);
}

/* Split Layout */

.split {
  display: grid;
  gap: var(--space-6);
  align-items: center;
}

@media (min-width: 1024px) {
  .split-2 {
    grid-template-columns: 1fr 1fr;
  }
}

/* Text Width Control */

.content-narrow {
  max-width: 680px;
}

.content-wide {
  max-width: 900px;
}



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

.site-footer {
  background: var(--color-bg-dark);
  color: #ffffff;
  padding-top: var(--space-8);
  padding-bottom: var(--space-5);
}

.footer-grid {
  display: grid;
  gap: var(--space-6);
}

.footer-brand {
  max-width: 320px;
}

.footer-logo {
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: var(--space-3);
}

.footer-description {
  color: #cbd5e1;
  font-size: var(--font-size-small);
  line-height: var(--line-height-body);
}

.footer-column ul {
  list-style: none;
  margin-top: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-heading {
  font-size: var(--font-size-small);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-column a {
  color: #cbd5e1;
  font-size: var(--font-size-small);
  transition: var(--transition-normal);
}

.footer-column a:hover {
  color: #ffffff;
}

/* Footer Bottom */

.footer-bottom {
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-small);
  color: #94a3b8;
}

/* Responsive Columns */

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

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}


/* =========================================
   MOTION SYSTEM
   ========================================= */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms ease, transform 600ms ease;
  will-change: opacity, transform;
}

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

/* Stagger Utility */

.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 600ms ease, transform 600ms ease;
}

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

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal-stagger > * {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}