/* ============================================================
   PREMIUM DESIGN TOKENS (HSL BASE)
   ============================================================ */
:root {
  --h: 210; /* Base Hue: Tech Blue */
  
  /* Shared Tokens (Fixed) */
  --font-heading: 'Outfit', 'Inter', system-ui, sans-serif;
  --font-main: 'Nunito', sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
  
  --h1-fluid: clamp(2.4rem, 10vw, 4.2rem);
  --h2-fluid: clamp(1.8rem, 8vw, 2.8rem);
  --h3-fluid: clamp(1.4rem, 6vw, 1.8rem);
  --p-mobile: 1.05rem;

  --radius-premium: 24px;
  --radius-pill: 50px;
  --radius-xl: 32px;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 8px;
  
  --container-max: 1400px;
  --ease-premium: cubic-bezier(0.16, 1, 0.3, 1);
  --transition: all 0.4s var(--ease-premium);

  /* Theme - LIGHT (Default) */
  /* Theme - LIGHT (Default) - Pure, Clean, Premium */
  --primary:    hsl(222, 47%, 15%); /* Brand Dark Navy */
  --primary-gl: hsla(222, 47%, 15%, 0.05);
  --secondary:  hsl(215, 25%, 27%);
  --accent:     hsl(142, 71%, 45%); /* Refined Emerald/Forest Green */
  --accent-gl:  hsla(142, 71%, 45%, 0.1);
  --accent-glow: hsla(142, 71%, 45%, 0.2);
  
  --text-main:      hsl(222, 47%, 12%);
  --text-secondary: hsl(215, 16%, 47%);
  --text-muted:     hsl(215, 16%, 65%);
  
  --bg-body:    hsl(210, 40%, 98%);
  --bg-surface: #ffffff;
  --bg-surface-2: hsl(210, 40%, 96%);
  --bg-card: var(--bg-surface);
  
  --border:     hsla(222, 47%, 12%, 0.08);
  --border-subtle: hsla(222, 47%, 12%, 0.04);
  
  --glass-bg:   rgba(255, 255, 255, 0.7);
  --glass-br:   rgba(255, 255, 255, 0.5);
  --glass-blur: blur(20px);
  --bg-glass:   hsla(0, 0%, 100%, 0.6);

  --shadow-premium:  0 20px 40px -10px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 30px 60px -12px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 30px hsla(142, 71%, 45%, 0.1);
}

/* Theme - DARK - Deep, Cinematic, High-Tech */
[data-theme="dark"] {
  --primary:    hsl(142, 71%, 45%); /* Highlight primary actions with brand green */
  --primary-gl: hsla(142, 71%, 45%, 0.15);
  --secondary:  hsl(222, 47%, 90%);
  --accent:     hsl(142, 71%, 45%);
  --accent-gl:  hsla(142, 71%, 45%, 0.2);
  --accent-glow: hsla(142, 71%, 45%, 0.25);
  
  --text-main:      hsl(210, 40%, 98%);
  --text-secondary: hsl(215, 20%, 75%);
  --text-muted:     hsl(215, 15%, 55%);
  
  --bg-body:    hsl(222, 47%, 4%); /* Pitch Deep Navy */
  --bg-surface: hsl(222, 47%, 7%);
  --bg-surface-2: hsl(222, 47%, 9%);
  --bg-card: var(--bg-surface-2);
  
  --border:     hsla(210, 40%, 98%, 0.1);
  --border-subtle: hsla(210, 40%, 98%, 0.05);
  
  --glass-bg:   rgba(10, 15, 30, 0.7);
  --glass-br:   rgba(255, 255, 255, 0.1);
  --bg-glass:   hsla(222, 47%, 10%, 0.6);
  
  --shadow-premium: 0 20px 50px -10px rgba(0, 0, 0, 0.8);
  --shadow-lg: 0 30px 60px -12px rgba(0, 0, 0, 0.9);
  --shadow-glow: 0 0 40px hsla(142, 71%, 45%, 0.15);
}

/* Glassmorphism Utilities with Subtle Grain */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-br);
  border-radius: var(--radius-premium);
  position: relative;
  overflow: hidden;
}

.glass-panel::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
  opacity: 0.03;
  pointer-events: none;
  z-index: 1;
}

.text-gradient {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.mesh-glow {
  position: relative;
}

.mesh-glow::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 70% 30%, hsla(var(--h), 100%, 50%, 0.05) 0%, transparent 60%),
    radial-gradient(circle at 30% 70%, hsla(160, 100%, 50%, 0.05) 0%, transparent 60%);
  pointer-events: none;
  z-index: -1;
}

/* ============================================================
   ALERTS / NOTIFICATIONS
   Usage: <div class="alert alert-success">...</div>
   ============================================================ */
.alert {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  font-size: 0.9rem;
  line-height: 1.55;
  animation: alertSlideIn 0.3s var(--bounce) both;
  position: relative;
}

@keyframes alertSlideIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.alert i.alert-icon {
  font-size: 1rem;
  margin-top: 1px;
  flex-shrink: 0;
}

.alert .alert-body {
  flex: 1;
}

.alert .alert-title {
  font-weight: 700;
  margin-bottom: 2px;
  font-size: 0.9rem;
  color: inherit;
}

.alert .alert-message {
  margin: 0;
  color: inherit;
  opacity: 0.85;
}

.alert-dismiss {
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px 6px;
  opacity: 0.5;
  font-size: 1rem;
  color: inherit;
  transition: var(--transition);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  line-height: 1;
}

.alert-dismiss:hover {
  opacity: 1;
  background: rgba(0, 0, 0, .08);
}

.alert-success {
  background: rgba(16, 185, 129, .08);
  border-color: rgba(16, 185, 129, .25);
  color: #065f46;
}

.alert-success i.alert-icon {
  color: var(--success);
}

.alert-warning {
  background: rgba(245, 158, 11, .08);
  border-color: rgba(245, 158, 11, .25);
  color: #92400e;
}

.alert-warning i.alert-icon {
  color: var(--warning);
}

.alert-danger {
  background: rgba(239, 68, 68, .08);
  border-color: rgba(239, 68, 68, .25);
  color: #991b1b;
}

.alert-danger i.alert-icon {
  color: var(--danger);
}

.alert-info {
  background: rgba(14, 165, 233, .08);
  border-color: rgba(14, 165, 233, .25);
  color: #075985;
}

.alert-info i.alert-icon {
  color: var(--secondary);
}

/* Toast (floating) — positioned by JS */
.ds-toast {
  min-width: 300px;
  max-width: 420px;
  box-shadow: var(--shadow-lg);
  pointer-events: all;
}

/* ============================================================
   BADGE VARIANTS
   ============================================================ */
.badge-success {
  color: var(--success);
  background: rgba(16, 185, 129, .1);
  border-color: rgba(16, 185, 129, .2);
}

.badge-warning {
  color: #b45309;
  background: rgba(245, 158, 11, .1);
  border-color: rgba(245, 158, 11, .2);
}

.badge-danger {
  color: var(--danger);
  background: rgba(239, 68, 68, .1);
  border-color: rgba(239, 68, 68, .2);
}

.badge-info {
  color: var(--secondary);
  background: rgba(14, 165, 233, .1);
  border-color: rgba(14, 165, 233, .2);
}

.badge-muted {
  color: var(--text-muted);
  background: rgba(0, 0, 0, .04);
  border-color: var(--border);
}

/* ============================================================
   MODAL
   Usage: <div class="ds-modal" id="myModal">...</div>
   Open: DSModal.open('myModal')   Close: DSModal.close('myModal')
   ============================================================ */
.ds-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 9990;
  background: rgba(1, 19, 36, .6);
  backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity 0.25s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.ds-modal-backdrop.open {
  opacity: 1;
}

.ds-modal-backdrop.open .ds-modal {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.ds-modal {
  background: var(--bg-surface);
  border-radius: var(--radius-xl);
  box-shadow: 0 24px 64px rgba(0, 0, 0, .18);
  width: 100%;
  max-width: 520px;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  transform: translateY(20px) scale(0.97);
  opacity: 0;
  transition: all 0.3s var(--bounce);
  position: relative;
}

.ds-modal-sm {
  max-width: 400px;
}

.ds-modal-lg {
  max-width: 720px;
}

.ds-modal-xl {
  max-width: 960px;
}

.ds-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 28px 0;
  flex-shrink: 0;
}

.ds-modal-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--primary);
  margin: 0;
}

.ds-modal-close {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--bg-body);
  border: 1px solid var(--border);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: var(--transition);
}

.ds-modal-close:hover {
  background: var(--danger);
  color: #fff;
  border-color: var(--danger);
}

.ds-modal-body {
  padding: 20px 28px;
  overflow-y: auto;
  flex: 1;
}

.ds-modal-footer {
  padding: 16px 28px 22px;
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

/* ============================================================
   BUTTON GROUPS
   ============================================================ */
.btn-group {
  display: inline-flex;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.btn-group .btn {
  border-radius: 0;
  border-right-width: 0;
  flex: 1;
}

.btn-group .btn:first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.btn-group .btn:last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  border-right-width: 1px;
}

.btn-group-vertical {
  display: inline-flex;
  flex-direction: column;
}

.btn-group-vertical .btn {
  border-radius: 0;
  border-bottom-width: 0;
  width: 100%;
  justify-content: flex-start;
}

.btn-group-vertical .btn:first-child {
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.btn-group-vertical .btn:last-child {
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  border-bottom-width: 1px;
}

/* ============================================================
   FORM ENHANCEMENTS
   ============================================================ */
.form-control {
  width: 100%;
  padding: 11px 14px;
  background: var(--bg-body);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-family: var(--font-main);
  font-size: 0.9rem;
  color: var(--text-main);
  transition: var(--transition);
  line-height: 1.5;
}

.form-control:focus {
  outline: none;
  background: var(--bg-surface);
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-control.is-invalid {
  border-color: var(--danger);
}

.form-control.is-invalid:focus {
  box-shadow: 0 0 0 3px rgba(239, 68, 68, .15);
}

.form-control.is-valid {
  border-color: var(--success);
}

.form-control.is-valid:focus {
  box-shadow: 0 0 0 3px rgba(16, 185, 129, .15);
}

.form-label {
  display: block;
  margin-bottom: 6px;
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--text-main);
}

.form-hint {
  display: block;
  margin-top: 5px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.form-error {
  display: block;
  margin-top: 5px;
  font-size: 0.8rem;
  color: var(--danger);
  font-weight: 500;
}

/* Input group (icon prefix/suffix) */
.input-group {
  position: relative;
  display: flex;
  align-items: stretch;
}

.input-group .form-control {
  flex: 1;
  border-radius: 0;
}

.input-group-prepend,
.input-group-append {
  display: flex;
  align-items: center;
  padding: 0 12px;
  background: var(--bg-body);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
  white-space: nowrap;
}

.input-group-prepend {
  border-right: 0;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.input-group-append {
  border-left: 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.input-group .form-control:first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.input-group .form-control:last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* Form check (checkbox/radio) */
.form-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
  cursor: pointer;
}

.form-check-input {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  margin-top: 1px;
  border: 2px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  accent-color: var(--accent);
}

.form-check-label {
  font-size: 0.875rem;
  color: var(--text-main);
  cursor: pointer;
}

/* Select */
select.form-control {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239ca3af' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* ============================================================
   CARD VARIANTS (NEW)
   ============================================================ */

/* Blog Card */
.card-blog {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.card-blog:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: rgba(99, 91, 255, .2);
}

.card-blog-img {
  height: 200px;
  overflow: hidden;
  background: var(--border);
  flex-shrink: 0;
}

.card-blog-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.card-blog:hover .card-blog-img img {
  transform: scale(1.04);
}

.card-blog-body {
  padding: 22px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-blog-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.card-blog-category {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--accent);
}

.card-blog-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 5px;
}

.card-blog-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
  line-height: 1.3;
}

.card-blog-excerpt {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
  margin-bottom: 16px;
}

.card-blog-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.card-blog-author {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.card-blog-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--accent-glow);
}

/* Portfolio Card */
.card-portfolio {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
}

.card-portfolio:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card-portfolio-img {
  height: 220px;
  overflow: hidden;
  position: relative;
  background: var(--border);
}

.card-portfolio-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.card-portfolio:hover .card-portfolio-img img {
  transform: scale(1.06);
}

.card-portfolio-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 37, 64, .7);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  opacity: 0;
  transition: var(--transition);
}

.card-portfolio:hover .card-portfolio-overlay {
  opacity: 1;
}

.card-portfolio-body {
  padding: 20px;
  flex: 1;
}

.card-portfolio-tag {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--accent);
  display: block;
  margin-bottom: 6px;
}

.card-portfolio-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
}

.card-portfolio-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ============================================================
   SPINNER / LOADING
   ============================================================ */
.ds-spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: ds-spin 0.7s linear infinite;
}

.ds-spinner-sm {
  width: 14px;
  height: 14px;
  border-width: 2px;
}

.ds-spinner-lg {
  width: 32px;
  height: 32px;
  border-width: 3px;
}

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

/* ============================================================
   SKELETON LOADERS
   ============================================================ */
.ds-skeleton {
  background: linear-gradient(90deg, var(--border) 25%, rgba(229, 231, 235, .5) 50%, var(--border) 75%);
  background-size: 200% 100%;
  animation: ds-shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

@keyframes ds-shimmer {
  from {
    background-position: 200% 0;
  }

  to {
    background-position: -200% 0;
  }
}

.ds-skeleton-text {
  height: 14px;
  margin-bottom: 10px;
}

.ds-skeleton-text.short {
  width: 40%;
}

.ds-skeleton-text.medium {
  width: 70%;
}

.ds-skeleton-img {
  height: 200px;
  border-radius: var(--radius-lg);
}

/* ============================================================
   DIVIDER
   ============================================================ */
.ds-divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 24px 0;
}

.ds-divider-label {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .08em;
}

.ds-divider-label::before,
.ds-divider-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
  .ds-modal {
    max-width: calc(100vw - 32px);
  }

  .btn-group {
    flex-wrap: wrap;
  }

  .ds-toast {
    min-width: calc(100vw - 40px);
  }
}

/* ============================================================
   DARK MODE OVERRIDES — Fix hardcoded light-mode colors
   ============================================================ */

/* Alerts: text colors were hardcoded for light background */
[data-theme="dark"] .alert-success {
  background: rgba(16, 185, 129, .1);
  border-color: rgba(16, 185, 129, .25);
  color: #6ee7b7;
}

[data-theme="dark"] .alert-warning {
  background: rgba(245, 158, 11, .1);
  border-color: rgba(245, 158, 11, .25);
  color: #fde68a;
}

[data-theme="dark"] .alert-danger {
  background: rgba(239, 68, 68, .1);
  border-color: rgba(239, 68, 68, .25);
  color: #fca5a5;
}

[data-theme="dark"] .alert-info {
  background: rgba(14, 165, 233, .1);
  border-color: rgba(14, 165, 233, .25);
  color: #7dd3fc;
}

/* Badges */
[data-theme="dark"] .badge-warning {
  color: #fde68a;
}

/* Card titles that used --primary (dark navy in light mode) */
[data-theme="dark"] .card-blog-title,
[data-theme="dark"] .card-portfolio-title {
  color: var(--text-main);
}

/* Skeleton shimmer — light gray flicker is invisible on dark */
[data-theme="dark"] .ds-skeleton {
  background: linear-gradient(90deg,
    var(--bg-surface-2) 25%,
    rgba(255, 255, 255, 0.05) 50%,
    var(--bg-surface-2) 75%);
  background-size: 200% 100%;
}