/* ===================================
   COMPONENT: Footer (Clean Implementation)
   Purpose: Site footer with brand, navigation, social links
   BEM Block: footer
   Dependencies: main.css for CSS variables and theme system
   =================================== */

/* ===================================
   FOOTER BLOCK - Base Structure
   =================================== */
.footer {
  padding: var(--space-16) 0;
  background: rgba(169, 204, 233, 0.98);
  backdrop-filter: blur(30px);
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

[data-theme="dark"] .footer {
  background: rgba(28, 47, 64, 0.95);
  backdrop-filter: blur(30px);
}

/* ===================================
   FOOTER BOKEH CIRCLES
   =================================== */

/* Keyframe owned by footer — do not rely on hero.css being present */
@keyframes float {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  33%       { transform: translateY(-20px) rotate(120deg); }
  66%       { transform: translateY(-10px) rotate(240deg); }
}

.footer__bokeh {
  position: absolute;
  border-radius: var(--radius-full);
  z-index: 1;
  animation: float 8s ease-in-out infinite;
}

.footer__bokeh--1 {
  top: 20px;
  left: 15%;
  width: 120px;
  height: 120px;
  background: linear-gradient(135deg, rgba(52, 124, 191, 0.2) 0%, rgba(52, 124, 191, 0.1) 100%);
  animation-delay: 0s;
}

.footer__bokeh--2 {
  bottom: 20px;
  right: 20%;
  width: 90px;
  height: 90px;
  background: linear-gradient(135deg, rgba(252, 175, 42, 0.25) 0%, rgba(252, 175, 42, 0.15) 100%);
  animation-delay: 1.5s;
  animation-duration: 6s;
}

.footer__bokeh--3 {
  top: 50%;
  right: 3%;
  width: 75px;
  height: 75px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.3) 0%, rgba(255, 255, 255, 0.2) 100%);
  animation-delay: 3s;
  animation-duration: 7s;
}

.footer__bokeh--4 {
  top: 15%;
  left: 55%;
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, rgba(52, 124, 191, 0.15) 0%, rgba(52, 124, 191, 0.08) 100%);
  animation-delay: 0.8s;
  animation-duration: 9s;
}

.footer__bokeh--5 {
  bottom: 30%;
  left: 2%;
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, rgba(252, 175, 42, 0.2) 0%, rgba(252, 175, 42, 0.12) 100%);
  animation-delay: 2.2s;
  animation-duration: 5.5s;
}

/* ===================================
   FOOTER WRAPPER
   =================================== */
.footer__wrapper {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  position: relative;
  z-index: 2;
  overflow: visible;
}

/* ===================================
   FOOTER CONTENT GRID
   =================================== */
.footer__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  margin-bottom: var(--space-8);
  align-items: start;
}

/* ===================================
   BRAND SECTION
   =================================== */
.footer__brand-section {
  max-width: 320px;
  justify-self: start;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.footer__logo-link {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  font-family: var(--font-family-heading);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-blue-light);
  text-decoration: none;
  margin-bottom: var(--space-6);
}

.footer__logo-image {
  height: 48px;
  width: auto;
  transition: transform var(--transition-fast), filter var(--transition-fast);
}

.footer__logo-image--dark {
  display: none;
}

[data-theme="dark"] .footer__logo-image--light {
  display: none;
}

[data-theme="dark"] .footer__logo-image--dark {
  display: block;
}

.footer__tagline {
  color: var(--color-blue);
  line-height: 1.5;
  font-size: var(--text-lg);
  margin-bottom: var(--space-5);
  font-weight: 600;
}

[data-theme="dark"] .footer__tagline {
  color: #7db8e8;
}

/* ===================================
   NAVIGATION SECTION
   =================================== */
.footer__navigation {
  justify-self: end;
  max-width: 600px;
}

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

.footer__nav-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer__nav-heading {
  color: var(--color-gray-900);
  font-size: var(--text-xl);
  font-weight: 700;
  margin: 0 0 var(--space-3) 0;
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-align: right;
}

[data-theme="dark"] .footer__nav-heading {
  color: #f8fafc;
}

.footer__nav-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding: 0;
  margin: 0;
  text-align: right;
}

.footer__nav-item {
  margin-bottom: 0;
}

.footer__nav-link {
  color: var(--color-blue);
  transition: all var(--transition-fast);
  font-weight: 500;
  font-size: var(--text-base);
  line-height: 1.6;
  display: block;
  padding: var(--space-1) 0;
  border-radius: var(--radius-sm);
  position: relative;
  text-decoration: none;
}

.footer__nav-link:hover {
  color: var(--color-white);
  transform: translateX(2px);
}

[data-theme="dark"] .footer__nav-link {
  color: #7db8e8;
}

[data-theme="dark"] .footer__nav-link:hover {
  color: #f8fafc;
}

/* ===================================
   BOTTOM BAR - Single Row Layout
   =================================== */
.footer__bottom-bar {
  border-top: 1px solid rgba(52, 124, 191, 0.3);
  padding-top: var(--space-6);
  margin-top: var(--space-4);
  overflow: visible;
}

[data-theme="dark"] .footer__bottom-bar {
  border-top-color: rgba(96, 165, 250, 0.3);
}

.footer__bottom-row {
  display: grid;
  grid-template-columns: minmax(200px, 1fr) minmax(400px, 1fr);
  grid-auto-rows: auto;
  gap: var(--space-8);
  overflow: visible;
}

/* ===================================
   INFO GROUP - Copyright and Version Stacked
   =================================== */
.footer__info-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  align-items: flex-start;
}

.footer__copyright {
  color: var(--color-blue);
  font-size: var(--text-sm);
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

[data-theme="dark"] .footer__copyright {
  color: #cbd5e1;
}

.footer__legal-links {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: auto;
}

.footer__legal-link {
  color: var(--color-blue);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-fast);
  padding: var(--space-1) 0;
}

.footer__legal-link:hover {
  color: var(--color-white);
}

.footer__legal-separator {
  color: var(--color-blue);
  font-size: var(--text-sm);
  opacity: 0.6;
}

[data-theme="dark"] .footer__legal-link {
  color: #7db8e8;
}

[data-theme="dark"] .footer__legal-link:hover {
  color: #f8fafc;
}

[data-theme="dark"] .footer__legal-separator {
  color: #7db8e8;
}

.footer__version {
  color: var(--color-blue);
  font-size: var(--text-xs);
  opacity: 0.7;
  margin: 0;
  padding: 0;
  line-height: 1.4;
}

[data-theme="dark"] .footer__version {
  color: #cbd5e1;
}

/* ===================================
   SOCIAL LINKS GROUP
   =================================== */
.footer__social-legal-group {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-3);
  overflow: visible;
}

.footer__social-group {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  width: 100%;
}

.footer__social-button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  background: var(--color-gray-100);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  color: var(--color-blue);
  transition: all var(--transition-fast);
  text-decoration: none;
  flex-shrink: 0;
}

.footer__social-button:hover {
  background: var(--color-orange);
  color: var(--color-white);
  transform: translateY(-2px);
  border-color: var(--color-orange);
}

[data-theme="dark"] .footer__social-button {
  background: rgba(52, 124, 191, 0.2);
  border-color: rgba(96, 165, 250, 0.3);
  color: #7db8e8;
}

[data-theme="dark"] .footer__social-button:hover {
  background: var(--color-orange);
  border-color: var(--color-orange);
  color: #f8fafc;
}

.footer__social-icon {
  display: block;
}

/* ===================================
   RESPONSIVE - Tablet (768px-1023px)
   =================================== */
@media (min-width: 768px) and (max-width: 1023px) {
  .footer {
    padding: var(--space-12) var(--space-6);
  }
  
  .footer__content {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-10);
    margin-bottom: var(--space-8);
  }
  
  .footer__brand-section {
    max-width: 100%;
  }
  
  .footer__logo-link {
    margin-bottom: var(--space-4);
  }
  
  .footer__logo-image {
    height: 36px;
  }
  
  .footer__tagline {
    font-size: var(--text-base);
    margin-bottom: var(--space-4);
  }
  
  .footer__navigation {
    max-width: 100%;
  }
  
  .footer__nav-columns {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
  
  .footer__nav-heading {
    font-size: var(--text-lg);
    margin-bottom: var(--space-2);
  }
  
  .footer__nav-link {
    font-size: var(--text-sm);
    padding: var(--space-1) 0;
  }
  
  .footer__bottom-bar {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
    padding-top: var(--space-4);
    align-items: center;
  }
  
  .footer__info-group {
    align-items: center;
    order: 2;
  }
  
  .footer__copyright {
    font-size: var(--text-sm);
    text-align: center;
  }
  
  .footer__social-group {
    justify-content: center;
    margin: var(--space-2) 0;
    order: 1;
  }
  
  .footer__social-button {
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
  }
  
  .footer__version {
    order: 3;
  }
  
  .footer__bokeh--1,
  .footer__bokeh--4 {
    display: none;
  }
  
  .footer__bokeh--2 {
    right: 10%;
    width: 70px;
    height: 70px;
  }
  
  .footer__bokeh--3 {
    right: 5%;
    width: 60px;
    height: 60px;
  }
  
  .footer__bokeh--5 {
    left: 5%;
    width: 65px;
    height: 65px;
  }
}

/* ===================================
   RESPONSIVE - Mobile (up to 767px)
   =================================== */
@media (max-width: 767px) {
  .footer {
    padding: var(--space-10) var(--space-4);
  }
  
  .footer__content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-6);
    text-align: center;
  }
  
  .footer__brand-section {
    max-width: 100%;
    justify-self: center;
    text-align: center;
    margin-bottom: var(--space-6);
  }
  
  .footer__logo-link {
    justify-content: center;
    margin-bottom: var(--space-3);
  }
  
  .footer__logo-image {
    height: 32px;
  }
  
  .footer__tagline {
    font-size: var(--text-sm);
    margin-bottom: var(--space-4);
    line-height: 1.4;
  }
  
  .footer__navigation {
    justify-self: center;
    max-width: 100%;
  }
  
  .footer__nav-columns {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }
  
  .footer__nav-column {
    text-align: center;
  }
  
  .footer__nav-heading {
    font-size: var(--text-base);
    margin-bottom: var(--space-2);
    text-align: center;
  }
  
  .footer__nav-list {
    text-align: center;
    gap: var(--space-2);
  }
  
  .footer__nav-link {
    font-size: var(--text-sm);
    padding: var(--space-2) 0;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  
  .footer__bottom-bar {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
    padding-top: var(--space-4);
    align-items: center;
  }
  
  .footer__info-group {
    align-items: center;
    order: 2;
  }
  
  .footer__copyright {
    font-size: var(--text-xs);
    line-height: 1.4;
    text-align: center;
  }
  
  .footer__social-group {
    justify-content: center;
    margin: var(--space-2) 0;
    gap: var(--space-2);
    order: 1;
  }
  
  .footer__social-button {
    width: 44px;
    height: 44px;
    min-width: 44px;
    min-height: 44px;
  }
  
  .footer__version {
    order: 3;
  }
  
  .footer__bokeh--1,
  .footer__bokeh--2,
  .footer__bokeh--4,
  .footer__bokeh--5 {
    display: none;
  }
  
  .footer__bokeh--3 {
    right: 3%;
    top: 40%;
    width: 50px;
    height: 50px;
  }
}

/* ===================================
   RESPONSIVE - Small Mobile (up to 640px)
   =================================== */
@media (max-width: 640px) {
  .footer__content {
    gap: var(--space-6);
  }
  
  .footer__nav-link {
    min-height: 44px;
  }
  
  .footer__social-button {
    width: 48px;
    height: 48px;
    min-width: 48px;
    min-height: 48px;
  }
}