/* ============================================================
   COMPONENTS — Reusable UI Design System
   Portfolio | AI Engineer & Full Stack Developer
   ============================================================ */

/* ── BUTTONS ─────────────────────────────────────────────── */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75em 1.75em;
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-normal);
  border-radius: var(--border-radius-sm);
  border: 1px solid transparent;
  cursor: none;
  white-space: nowrap;
  overflow: hidden;
  text-decoration: none;
  transition: var(--transition-spring);
  isolation: isolate;
  -webkit-tap-highlight-color: transparent;
}

/* Ripple Effect */
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.12);
  border-radius: inherit;
  transform: scale(0);
  opacity: 0;
  transition: transform 0.4s var(--ease-out), opacity 0.4s var(--ease-out);
}

.btn:active::before { transform: scale(2.5); opacity: 0; }

/* Primary */
.btn--primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn--primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-glow-primary), var(--shadow-lg);
  filter: brightness(1.1);
}

/* Secondary */
.btn--secondary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: var(--shadow-secondary);
}
.btn--secondary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: var(--shadow-glow-secondary), var(--shadow-lg);
  filter: brightness(1.1);
}

/* Outline */
.btn--outline {
  background: transparent;
  color: var(--text-primary);
  border-color: var(--border-default);
}
.btn--outline:hover {
  background: var(--bg-card);
  border-color: var(--color-primary);
  color: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-primary);
}

/* Ghost */
.btn--ghost {
  background: transparent;
  color: var(--text-muted);
}
.btn--ghost:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

/* Gradient (vivid) */
.btn--gradient {
  background: var(--gradient-full);
  background-size: 200% auto;
  color: #fff;
  box-shadow: var(--shadow-lg);
  animation: gradientShift 3s linear infinite;
  background-clip: padding-box;
}
.btn--gradient:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: var(--shadow-xl);
}

/* Glow */
.btn--glow {
  background: rgba(37,99,235,0.15);
  color: var(--color-primary-light);
  border-color: var(--border-primary);
  box-shadow: inset 0 0 20px rgba(37,99,235,0.1);
}
.btn--glow:hover {
  background: rgba(37,99,235,0.25);
  box-shadow: var(--shadow-glow-primary), inset 0 0 30px rgba(37,99,235,0.15);
  transform: translateY(-2px);
}

/* Sizes */
.btn--xs  { padding: 0.35em 0.9em; font-size: var(--fs-2xs); }
.btn--sm  { padding: 0.55em 1.2em; font-size: var(--fs-xs); }
.btn--lg  { padding: 0.9em 2.2em;  font-size: var(--fs-base); border-radius: var(--border-radius-md); }
.btn--xl  { padding: 1.1em 2.8em;  font-size: var(--fs-lg);   border-radius: var(--border-radius-md); }
.btn--icon{ padding: 0.7em; border-radius: var(--border-radius-sm); aspect-ratio: 1; }

/* Social Button */
.btn--social {
  width: 40px; height: 40px;
  padding: 0;
  border-radius: var(--border-radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  color: var(--text-muted);
  font-size: var(--fs-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.btn--social:hover {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #fff;
  transform: translateY(-3px) scale(1.1);
  box-shadow: var(--shadow-primary);
}

/* Resume CTA */
.btn--resume {
  background: transparent;
  border: 1px solid var(--border-primary);
  color: var(--color-primary-light);
  font-size: var(--fs-xs);
  padding: 0.5em 1.2em;
}
.btn--resume:hover {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #fff;
  box-shadow: var(--shadow-primary);
  transform: translateY(-1px);
}

/* ── CARDS ───────────────────────────────────────────────── */
.card {
  position: relative;
  background: var(--gradient-card);
  border: 1px solid var(--border-default);
  border-radius: var(--border-radius-lg);
  padding: var(--space-8);
  overflow: hidden;
  transition: var(--transition-slow);
  isolation: isolate;
}

/* Glass shimmer on top */
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.06) 0%, transparent 60%);
  border-radius: inherit;
  pointer-events: none;
}

/* Animated border glow on hover */
.card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: var(--gradient-border);
  opacity: 0;
  z-index: -1;
  transition: opacity var(--duration-slow) var(--ease-in-out);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}
.card:hover::after { opacity: 1; }

/* Card Variants */
.card--glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-color: var(--glass-border);
}

.card--elevated {
  background: var(--bg-elevated);
  border-color: var(--border-subtle);
}

.card--project {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: 0;
  overflow: hidden;
}

.card--certificate {
  padding: var(--space-4);
  text-align: center;
  cursor: none;
}

.card--stat {
  padding: var(--space-6);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

/* Project Card Sub-elements */
.card__image-wrap {
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  border-radius: var(--border-radius-md) var(--border-radius-md) 0 0;
  background: var(--bg-elevated);
  position: relative;
}

.card__image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slower) var(--ease-out);
}

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

.card__image-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 50%, rgba(5,8,22,0.8));
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: var(--space-4);
  gap: var(--space-2);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-in-out);
}

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

.card__body { padding: var(--space-6); flex: 1; display: flex; flex-direction: column; gap: var(--space-3); }

.card__title {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  color: var(--text-primary);
  line-height: var(--lh-snug);
}

.card__desc {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  line-height: var(--lh-relaxed);
  flex: 1;
}

.card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  border-top: 1px solid var(--border-subtle);
  gap: var(--space-4);
  flex-wrap: wrap;
}

/* Certificate Card */
.cert-card__img-wrap {
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
  border-radius: var(--border-radius-md);
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  margin-bottom: var(--space-4);
  position: relative;
}

.cert-card__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slower) var(--ease-out);
}

.card:hover .cert-card__img-wrap img { transform: scale(1.04); }

.cert-card__badge {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  padding: var(--space-1) var(--space-3);
  font-size: var(--fs-2xs);
  font-weight: var(--fw-semibold);
  border-radius: var(--border-radius-full);
  background: var(--gradient-primary);
  color: #fff;
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}

/* Stat Card */
.card__stat-number {
  font-family: var(--font-heading);
  font-size: var(--fs-4xl);
  font-weight: var(--fw-black);
  background: var(--gradient-text-vivid);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.card__stat-label {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  font-weight: var(--fw-medium);
}

/* Timeline Card */
.timeline-card {
  position: relative;
  padding: var(--space-6) var(--space-8);
  background: var(--gradient-card);
  border: 1px solid var(--border-default);
  border-radius: var(--border-radius-lg);
  transition: var(--transition-slow);
}

.timeline-card:hover {
  transform: translateX(6px);
  border-color: var(--border-primary);
  box-shadow: var(--shadow-primary);
}

.timeline-card__period {
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  color: var(--color-accent);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.timeline-card__role {
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.timeline-card__company {
  font-size: var(--fs-base);
  color: var(--color-primary-light);
  font-weight: var(--fw-medium);
  margin-bottom: var(--space-4);
}

.timeline-card__desc {
  font-size: var(--fs-sm);
  color: var(--text-muted);
  line-height: var(--lh-relaxed);
}

/* ── TAGS & BADGES ───────────────────────────────────────── */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  font-size: var(--fs-2xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wide);
  border-radius: var(--border-radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  color: var(--text-muted);
  transition: var(--transition-fast);
  white-space: nowrap;
}

.tag:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-light);
  background: rgba(37,99,235,0.1);
}

.tag--primary   { background: rgba(37,99,235,0.15);  border-color: rgba(37,99,235,0.35);  color: var(--color-primary-light); }
.tag--secondary { background: rgba(124,58,237,0.15); border-color: rgba(124,58,237,0.35); color: var(--color-secondary-light); }
.tag--accent    { background: rgba(6,182,212,0.12);  border-color: rgba(6,182,212,0.35);  color: var(--color-accent-light); }
.tag--success   { background: rgba(16,185,129,0.12); border-color: rgba(16,185,129,0.35); color: #34D399; }
.tag--warning   { background: rgba(245,158,11,0.12); border-color: rgba(245,158,11,0.35); color: #FCD34D; }
.tag--danger    { background: rgba(239,68,68,0.12);  border-color: rgba(239,68,68,0.35);  color: #F87171; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  border-radius: var(--border-radius-full);
  letter-spacing: var(--ls-wide);
  text-transform: uppercase;
}

.badge--primary   { background: var(--gradient-primary);  color: #fff; }
.badge--secondary { background: var(--gradient-accent);   color: #fff; }
.badge--outline   { border: 1px solid var(--border-primary); color: var(--color-primary-light); background: transparent; }
.badge--glow      { background: var(--gradient-primary); color: #fff; box-shadow: var(--shadow-primary); }

/* Status Dot */
.status-dot {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--color-success);
}

.status-dot::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  box-shadow: 0 0 8px var(--color-success);
  animation: pulse 2s ease-in-out infinite;
}

/* ── TAG GROUP ───────────────────────────────────────────── */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* ── SKILL CHIP ──────────────────────────────────────────── */
.skill-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--border-radius-md);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
  transition: var(--transition-spring);
  cursor: default;
}

.skill-chip:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-primary);
  color: var(--text-primary);
  transform: translateY(-3px) scale(1.03);
  box-shadow: var(--shadow-primary);
}

.skill-chip__icon { font-size: var(--fs-lg); }

/* ── SECTION TITLE COMPONENT ─────────────────────────────── */
.section-title-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  text-align: center;
  margin-bottom: clamp(40px, 6vw, 80px);
}

.section-title-wrap--left {
  align-items: flex-start;
  text-align: left;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-xs);
  font-weight: var(--fw-bold);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--color-accent);
  padding: var(--space-2) var(--space-4);
  background: rgba(6,182,212,0.08);
  border: 1px solid rgba(6,182,212,0.2);
  border-radius: var(--border-radius-full);
}

/* ── INPUTS & FORM ELEMENTS ──────────────────────────────── */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--text-secondary);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--space-4) var(--space-5);
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-radius: var(--border-radius-sm);
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  color: var(--text-primary);
  transition: var(--transition-base);
  backdrop-filter: var(--glass-blur-light);
  -webkit-backdrop-filter: var(--glass-blur-light);
}

.form-input::placeholder,
.form-textarea::placeholder { color: var(--text-faint); }

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--bg-card-hover);
  box-shadow: 0 0 0 3px rgba(37,99,235,0.12);
}

.form-textarea {
  resize: vertical;
  min-height: 140px;
  line-height: var(--lh-relaxed);
}

.form-input--error { border-color: var(--color-danger); }
.form-input--success { border-color: var(--color-success); }

.form-hint {
  font-size: var(--fs-xs);
  color: var(--text-faint);
}

.form-error {
  font-size: var(--fs-xs);
  color: var(--color-danger);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ── MODAL ───────────────────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--bg-overlay);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-in-out);
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--border-radius-xl);
  padding: var(--space-10);
  max-width: min(680px, 100%);
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: var(--shadow-2xl);
  transform: scale(0.92) translateY(20px);
  transition: transform var(--duration-slow) var(--ease-spring);
}

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

.modal__close {
  position: absolute;
  top: var(--space-5);
  right: var(--space-5);
  width: 32px; height: 32px;
  border-radius: var(--border-radius-xs);
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: var(--fs-lg);
  transition: var(--transition-base);
  cursor: none;
}

.modal__close:hover {
  background: rgba(239,68,68,0.15);
  border-color: rgba(239,68,68,0.3);
  color: var(--color-danger);
}

/* ── TOOLTIP ─────────────────────────────────────────────── */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::before,
[data-tooltip]::after {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-out);
  z-index: var(--z-overlay);
}

[data-tooltip]::before {
  content: attr(data-tooltip);
  bottom: calc(100% + 8px);
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  color: var(--text-primary);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  padding: 6px 10px;
  border-radius: var(--border-radius-xs);
  white-space: nowrap;
  box-shadow: var(--shadow-md);
}

[data-tooltip]::after {
  content: '';
  bottom: calc(100% + 2px);
  border: 5px solid transparent;
  border-top-color: var(--border-default);
}

[data-tooltip]:hover::before,
[data-tooltip]:hover::after { opacity: 1; }

/* ── AVATAR ──────────────────────────────────────────────── */
.avatar {
  border-radius: 50%;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  color: #fff;
  font-weight: var(--fw-bold);
  flex-shrink: 0;
}

.avatar--sm  { width: 32px;  height: 32px;  font-size: var(--fs-xs); }
.avatar--md  { width: 48px;  height: 48px;  font-size: var(--fs-base); }
.avatar--lg  { width: 80px;  height: 80px;  font-size: var(--fs-2xl); }
.avatar--xl  { width: 120px; height: 120px; font-size: var(--fs-3xl); }
.avatar--2xl { width: 180px; height: 180px; font-size: var(--fs-4xl); }

.avatar--ring {
  box-shadow: 0 0 0 3px var(--bg-base), 0 0 0 5px var(--color-primary), var(--shadow-glow-primary);
}

/* ── PROGRESS BAR ────────────────────────────────────────── */
.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--border-subtle);
  border-radius: var(--border-radius-full);
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--border-radius-full);
  width: 0%;
  transition: width 1.2s var(--ease-out);
  position: relative;
  overflow: hidden;
}

.progress-bar__fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: progressShimmer 2s linear infinite;
}

/* ── GRID LAYOUTS ────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--space-6); }
.grid-auto-sm { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: var(--space-4); }

/* ── HIGHLIGHT BOX ───────────────────────────────────────── */
.highlight-box {
  padding: var(--space-6) var(--space-8);
  background: var(--bg-card);
  border: 1px solid var(--border-default);
  border-left: 3px solid var(--color-primary);
  border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: var(--lh-relaxed);
}

/* ── PLACEHOLDER (for content coming in Prompt 2/3) ──────── */
.placeholder-block {
  width: 100%;
  min-height: 200px;
  background: var(--bg-card);
  border: 2px dashed var(--border-default);
  border-radius: var(--border-radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  color: var(--text-faint);
  font-size: var(--fs-sm);
  text-align: center;
  padding: var(--space-8);
}

.placeholder-block__icon { font-size: var(--fs-3xl); opacity: 0.4; }
.placeholder-block__label { font-weight: var(--fw-semibold); letter-spacing: var(--ls-wide); text-transform: uppercase; font-size: var(--fs-xs); }

/* ── LIGHTBOX MODAL (for certificates & gallery) ─────────── */
.lightbox-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(5, 8, 22, 0.95);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-in-out);
}

.lightbox-backdrop.open {
  opacity: 1;
  pointer-events: all;
}

.lightbox-content {
  position: relative;
  max-width: 90vw;
  max-height: 90vh;
  transform: scale(0.92) translateY(20px);
  transition: transform var(--duration-slow) var(--ease-spring);
}

.lightbox-backdrop.open .lightbox-content {
  transform: scale(1) translateY(0);
}

.lightbox-image {
  max-width: 100%;
  max-height: 85vh;
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-2xl);
  border: 1px solid var(--border-default);
  background: var(--bg-elevated);
  object-fit: contain;
}

.lightbox-close {
  position: absolute;
  top: -50px;
  right: 0;
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: var(--fs-xl);
  cursor: none;
  transition: var(--transition-spring);
}

.lightbox-close:hover {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.4);
  color: var(--color-danger);
  transform: rotate(90deg) scale(1.1);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: var(--border-radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  font-size: var(--fs-lg);
  cursor: none;
  transition: var(--transition-spring);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
}

.lightbox-nav:hover {
  background: var(--gradient-primary);
  border-color: transparent;
  color: #fff;
  transform: translateY(-50%) scale(1.1);
  box-shadow: var(--shadow-primary);
}

.lightbox-prev { left: -60px; }
.lightbox-next { right: -60px; }

.lightbox-caption {
  position: absolute;
  bottom: -60px;
  left: 0;
  right: 0;
  text-align: center;
  color: var(--text-muted);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
}

.lightbox-counter {
  position: absolute;
  bottom: -90px;
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-2) var(--space-4);
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--border-radius-full);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  color: var(--text-muted);
  letter-spacing: var(--ls-wide);
  white-space: nowrap;
}

@media (max-width: 768px) {
  .lightbox-prev { left: var(--space-2); }
  .lightbox-next { right: var(--space-2); }
  .lightbox-close { top: var(--space-2); right: var(--space-2); }
  .lightbox-caption { position: static; margin-top: var(--space-4); }
  .lightbox-counter { position: static; transform: none; margin-top: var(--space-2); display: inline-block; }
}

/* ── GALLERY MASONRY LIGHTBOX TRIGGER ────────────────────── */
.gallery-item {
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--transition-base);
}

.gallery-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 60%, rgba(0,0,0,0.7));
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-in-out);
  pointer-events: none;
}

.gallery-item:hover::after {
  opacity: 1;
}

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

/* Gallery expand icon overlay */
.gallery-item-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-in-out);
  z-index: 2;
}

.gallery-item:hover .gallery-item-overlay {
  opacity: 1;
}

.gallery-item-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--border-radius-sm);
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: var(--fs-xl);
}

/* ── CERTIFICATE CARD CLICK TARGET ───────────────────────── */
.cert-card__img-wrap {
  cursor: pointer;
  position: relative;
}

.cert-card__img-wrap::after {
  content: '\f065'; /* fa-expand */
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  border-radius: var(--border-radius-sm);
  background: rgba(37, 99, 235, 0.9);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: var(--fs-xl);
  opacity: 0;
  transition: opacity var(--duration-base) var(--ease-in-out),
              transform var(--duration-base) var(--ease-spring);
  pointer-events: none;
}

.card--certificate:hover .cert-card__img-wrap::after {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

/* ── COUNTER NUMBER ANIMATION READY ──────────────────────── */
[data-counter] {
  display: inline-block;
  font-variant-numeric: tabular-nums;
  min-width: 1ch;
}

/* ── LOADING BAR SHIMMER EFFECT ──────────────────────────── */
.loader__progress {
  position: relative;
  overflow: hidden;
}

.loader__progress::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  animation: progressShimmer 1.5s ease-in-out infinite;
}

/* ── SCROLL REVEAL FADE CLASSES ──────────────────────────── */
.fade-in-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s var(--ease-out),
              transform 0.6s var(--ease-out);
}

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

/* ── STAT COUNTER GLOW ON COUNT ──────────────────────────── */
.card__stat-number.counting {
  animation: statGlow 1.5s ease-in-out;
}

@keyframes statGlow {
  0%, 100% { text-shadow: none; }
  50% { text-shadow: 0 0 20px rgba(37, 99, 235, 0.6), 0 0 40px rgba(37, 99, 235, 0.3); }
}

/* ── IMAGE LOADING SKELETON ──────────────────────────────── */
img[loading="lazy"] {
  background: var(--bg-card);
  min-height: 100px;
}

img[loading="lazy"]:not([src]) {
  opacity: 0.5;
  animation: shimmer 1.8s linear infinite;
}

/* ── FOCUS VISIBLE ENHANCEMENT ───────────────────────────── */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--border-radius-xs);
}

/* ── REDUCED MOTION RESPECT ──────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .lightbox-content,
  .gallery-item,
  .modal,
  .card {
    transition: opacity 0.2s ease !important;
    transform: none !important;
  }
}