/* ===================================
   CSS VARIABLES & MODERN DESIGN SYSTEM
   =================================== */
:root {
  /* Color Palette */
  --primary-color: #6366f1;
  --primary-hover: #4f46e5;
  --secondary-color: #ec4899;
  --accent-color: #f59e0b;
  --dark-bg: #0f172a;
  --light-bg: #f8fafc;
  --card-bg: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --border-color: #e2e8f0;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-hover: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* Spacing */
  --navbar-height: 70px;
  --content-max-width: 1400px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ===================================
   GLOBAL STYLES
   =================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

main {
  min-height: calc(100vh - var(--navbar-height));
  padding-top: calc(var(--navbar-height) + 2rem);
  padding-bottom: 3rem;
}

a {
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-base);
}

/* ===================================
   NAVBAR STYLES
   =================================== */
.navbar {
  background: rgba(255, 255, 255, 0.95) !important;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-md);
  padding: 0.75rem 0;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--navbar-height);
  border-bottom: 2px solid transparent;
  background-image: linear-gradient(
      rgba(255, 255, 255, 0.95),
      rgba(255, 255, 255, 0.95)
    ),
    linear-gradient(90deg, var(--primary-color), var(--secondary-color));
  background-origin: border-box;
  background-clip: padding-box, border-box;
}

.navbar-brand {
  font-size: 1.75rem;
  font-weight: 800;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.5px;
  transition: all var(--transition-base);
}

.navbar-brand:hover {
  transform: translateY(-2px);
  filter: brightness(1.1);
}

.nav-link {
  color: var(--text-primary) !important;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  margin: 0 0.25rem;
  border-radius: 8px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.nav-link::before {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: all var(--transition-base);
  transform: translateX(-50%);
}

.nav-link:hover {
  background: var(--light-bg);
  transform: translateY(-2px);
}

.nav-link:hover::before {
  width: 80%;
}

/* Mobile navbar styles */
@media (max-width: 991px) {
  .navbar {
    height: auto;
    min-height: var(--navbar-height);
  }

  .navbar-collapse {
    background: white;
    border-radius: 12px;
    margin-top: 1rem;
    padding: 1rem;
    box-shadow: var(--shadow-md);
  }

  .navbar-nav {
    gap: 0.5rem;
  }

  .nav-link {
    width: 100%;
    text-align: left;
    margin: 0;
    padding: 0.75rem 1rem !important;
  }

  .nav-link::before {
    display: none;
  }

  .nav-link:hover {
    background: var(--light-bg);
    transform: translateX(4px);
  }

  .navbar-brand {
    font-size: 1.5rem;
  }
}

/* ===================================
   FLASH MESSAGES
   =================================== */
.alert {
  border: none;
  border-radius: 12px;
  padding: 1rem 1.5rem;
  margin: 1rem auto;
  max-width: 600px;
  animation: slideDown 0.4s ease;
  box-shadow: var(--shadow-md);
}

.alert-success {
  background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
  color: #065f46;
  border-left: 4px solid #10b981;
}

.alert-danger {
  background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
  color: #991b1b;
  border-left: 4px solid #ef4444;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===================================
   MASONRY GRID - HOME PAGE
   =================================== */
.gallery-container {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 0 1rem;
}



.masonry-grid {
  column-count: 1;
  column-gap: 1.5rem;
}

@media (min-width: 576px) {
  .masonry-grid {
    column-count: 2;
  }
}

@media (min-width: 992px) {
  .masonry-grid {
    column-count: 3;
  }
}

@media (min-width: 1400px) {
  .masonry-grid {
    column-count: 4;
  }
}

.gallery-item {
  break-inside: avoid;
  margin-bottom: 1.5rem;
  animation: fadeInUp 0.6s ease backwards;
}

.gallery-item:nth-child(1) {
  animation-delay: 0.1s;
}
.gallery-item:nth-child(2) {
  animation-delay: 0.15s;
}
.gallery-item:nth-child(3) {
  animation-delay: 0.2s;
}
.gallery-item:nth-child(4) {
  animation-delay: 0.25s;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.gallery-card {
  background: var(--card-bg);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  cursor: pointer;
  position: relative;
}

.gallery-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}

.gallery-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: 1;
  pointer-events: none;
}

.gallery-card:hover::before {
  opacity: 0.1;
}

.gallery-image-wrapper {
  position: relative;
  overflow: hidden;
  background: #f1f5f9;
}

.gallery-image {
  width: 100%;
  height: auto;
  display: block;
  transition: transform var(--transition-slow);
  object-fit: cover;
}

.gallery-card:hover .gallery-image {
  transform: scale(1.08);
}

.gallery-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 1.5rem;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
  color: white;
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

.gallery-card:hover .gallery-overlay {
  transform: translateY(0);
}

.gallery-overlay h5 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.gallery-overlay p {
  font-size: 0.875rem;
  opacity: 0.9;
  margin: 0;
}

.gallery-card-body {
  padding: 1.25rem;
}

.gallery-card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  transition: color var(--transition-base);
}

.gallery-card:hover .gallery-card-title {
  color: var(--primary-color);
}

.gallery-card-text {
  color: var(--text-secondary);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.gallery-card-text::before {
  content: "👤";
  font-size: 1rem;
}

/* ===================================
   SHOW PAGE - IMAGE DETAIL VIEW
   =================================== */
.detail-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
  animation: fadeIn 0.6s ease;
}

.detail-card {
  background: var(--card-bg);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  margin-bottom: 2rem;
}

.detail-image-wrapper {
  position: relative;
  background: #000;
  max-height: 600px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.detail-image {
  width: 100%;
  height: auto;
  max-height: 600px;
  object-fit: contain;
  cursor: zoom-in;
  transition: transform var(--transition-base);
}

.detail-image:hover {
  transform: scale(1.02);
}

.detail-content {
  padding: 2.5rem;
}

.detail-title {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 1rem;
  line-height: 1.2;
}

.detail-meta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--border-color);
  flex-wrap: wrap;
}

.detail-meta-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.detail-meta-icon {
  font-size: 1.25rem;
}

.detail-description {
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-primary);
  margin-bottom: 2rem;
}

.detail-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-action {
  flex: 1;
  min-width: 150px;
  padding: 0.875rem 2rem;
  border: none;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
  text-align: center;
  display: inline-block;
}

.btn-delete {
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: white;
}

.btn-delete:hover {
  background: linear-gradient(135deg, #dc2626, #b91c1c);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-edit {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--primary-hover)
  );
  color: white;
}

.btn-edit:hover {
  background: linear-gradient(135deg, var(--primary-hover), #3730a3);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ===================================
   FORMS - POST, EDIT, LOGIN
   =================================== */
.form-container {
  max-width: 700px;
  margin: 0 auto;
  padding: 0 1rem;
  animation: fadeIn 0.6s ease;
}

.form-card {
  background: var(--card-bg);
  border-radius: 24px;
  padding: 3rem;
  box-shadow: var(--shadow-xl);
}

.form-title {
  font-size: 2rem;
  font-weight: 800;
  text-align: center;
  margin-bottom: 0.5rem;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.form-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 2.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
  font-size: 0.95rem;
}

.form-control {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: 12px;
  font-size: 1rem;
  transition: all var(--transition-base);
  background: var(--light-bg);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  background: white;
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.form-control:invalid:not(:placeholder-shown) {
  border-color: #ef4444;
}

.form-control:valid:not(:placeholder-shown) {
  border-color: #10b981;
}

.invalid-feedback {
  color: #ef4444;
  font-size: 0.875rem;
  margin-top: 0.5rem;
  display: none;
}

.was-validated .form-control:invalid ~ .invalid-feedback {
  display: block;
}

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

.form-submit-btn {
  width: 100%;
  padding: 1rem;
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 1.125rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
  margin-top: 1rem;
}

.form-submit-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  filter: brightness(1.05);
}

.form-submit-btn:active {
  transform: translateY(0);
}

/* ===================================
   LIGHTBOX MODAL
   =================================== */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.95);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.3s ease;
  padding: 2rem;
}

.lightbox.active {
  display: flex;
}

.lightbox-content {
  max-width: 90%;
  max-height: 90%;
  position: relative;
  animation: zoomIn 0.3s ease;
}

@keyframes zoomIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.lightbox-image {
  max-width: 100%;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: var(--shadow-xl);
}

.lightbox-close {
  position: absolute;
  top: -2.5rem;
  right: 0;
  background: white;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
}

.lightbox-close:hover {
  transform: rotate(90deg);
  background: var(--primary-color);
  color: white;
}

/* ===================================
   LOADING SKELETON
   =================================== */
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
  border-radius: 8px;
}

@keyframes loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

.skeleton-image {
  width: 100%;
  padding-bottom: 75%;
}

/* ===================================
   RESPONSIVE UTILITIES
   =================================== */
@media (max-width: 768px) {

  .detail-title {
    font-size: 1.75rem;
  }

  .detail-content {
    padding: 1.5rem;
  }

  .form-card {
    padding: 2rem 1.5rem;
  }

  .detail-actions {
    flex-direction: column;
  }

  .btn-action {
    width: 100%;
  }
}

/* ===================================
   SCROLL ANIMATIONS
   =================================== */
.fade-in-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

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

/* ===================================
   CUSTOM SCROLLBAR
   =================================== */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--light-bg);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(
    135deg,
    var(--primary-hover),
    var(--secondary-color)
  );
}

/* ===================================
   UTILITY CLASSES
   =================================== */
.text-gradient {
  background: linear-gradient(
    135deg,
    var(--primary-color),
    var(--secondary-color)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hover-lift {
  transition: transform var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-4px);
}