/* ═══════════════════════════════════════════════════════════════
   COMPONENTS.CSS  –  Reusable UI Components
   Jeeva Sivan Portfolio | Dark Futuristic Developer Theme
   ═══════════════════════════════════════════════════════════════ */

/* ─── Section Header Component ───────────────────────────────── */
.section-header {
  margin-bottom: var(--sp-16);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  color: var(--clr-cyan);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--sp-3);
}

.section-tag::before {
  content: '';
  display: block;
  width: 20px;
  height: 1px;
  background: var(--clr-cyan);
  box-shadow: var(--glow-text-cyan);
}

.section-heading {
  font-size: clamp(var(--fs-2xl), 5vw, var(--fs-4xl));
  font-weight: var(--fw-extrabold);
  line-height: var(--lh-tight);
  margin-bottom: var(--sp-4);
}

.section-heading .hl {
  background: linear-gradient(135deg, var(--clr-blue-bright) 0%, var(--clr-cyan) 50%, var(--clr-purple-bright) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-desc {
  font-size: var(--fs-md);
  color: var(--clr-text-secondary);
  max-width: 560px;
  line-height: var(--lh-relaxed);
}

/* ─── Card Component ─────────────────────────────────────────── */
.card {
  background: var(--clr-bg-glass);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  padding: var(--sp-8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition:
    border-color var(--transition-base),
    transform var(--transition-bounce),
    box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(59,130,246,0.5), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover {
  border-color: var(--clr-border-bright);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl), var(--glow-blue);
}

.card:hover::before {
  opacity: 1;
}

/* ─── Card Accent Colors ─────────────────────────────────────── */
.card-accent-blue::before   { background: linear-gradient(90deg, transparent, rgba(59,130,246,0.6), transparent); }
.card-accent-cyan::before   { background: linear-gradient(90deg, transparent, rgba(6,182,212,0.6), transparent); }
.card-accent-purple::before { background: linear-gradient(90deg, transparent, rgba(139,92,246,0.6), transparent); }

.card-accent-blue:hover   { box-shadow: var(--shadow-xl), var(--glow-blue); border-color: rgba(59,130,246,0.4); }
.card-accent-cyan:hover   { box-shadow: var(--shadow-xl), var(--glow-cyan); border-color: rgba(6,182,212,0.4); }
.card-accent-purple:hover { box-shadow: var(--shadow-xl), var(--glow-purple); border-color: rgba(139,92,246,0.4); }

/* ─── Icon Box ───────────────────────────────────────────────── */
.icon-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  font-size: 1.5rem;
  flex-shrink: 0;
}

.icon-box-blue   { background: rgba(59, 130, 246, 0.12); border: 1px solid rgba(59,130,246,0.25); }
.icon-box-cyan   { background: rgba(6, 182, 212, 0.12);  border: 1px solid rgba(6,182,212,0.25); }
.icon-box-purple { background: rgba(139, 92, 246, 0.12); border: 1px solid rgba(139,92,246,0.25); }

/* ─── Skill Badge / Tag ──────────────────────────────────────── */
.skill-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  padding: var(--sp-2) var(--sp-4);
  border-radius: var(--radius-full);
  border: 1px solid;
  transition: transform var(--transition-bounce), box-shadow var(--transition-base);
  cursor: default;
}

.skill-badge:hover {
  transform: translateY(-2px) scale(1.03);
}

.skill-badge-blue {
  color: var(--clr-blue-bright);
  background: rgba(59, 130, 246, 0.08);
  border-color: rgba(59, 130, 246, 0.3);
}

.skill-badge-blue:hover {
  box-shadow: 0 0 12px rgba(59, 130, 246, 0.3);
  background: rgba(59, 130, 246, 0.14);
}

.skill-badge-cyan {
  color: var(--clr-cyan-bright);
  background: rgba(6, 182, 212, 0.08);
  border-color: rgba(6, 182, 212, 0.3);
}

.skill-badge-cyan:hover {
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.3);
  background: rgba(6, 182, 212, 0.14);
}

.skill-badge-purple {
  color: var(--clr-purple-bright);
  background: rgba(139, 92, 246, 0.08);
  border-color: rgba(139, 92, 246, 0.3);
}

.skill-badge-purple:hover {
  box-shadow: 0 0 12px rgba(139, 92, 246, 0.3);
  background: rgba(139, 92, 246, 0.14);
}

/* ─── Timeline Component ─────────────────────────────────────── */
.timeline {
  position: relative;
  padding-left: var(--sp-8);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--clr-blue), var(--clr-purple), transparent);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--sp-10);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--sp-8) + 8px);
  top: 8px;
  width: 10px;
  height: 10px;
  background: var(--clr-cyan);
  border-radius: 50%;
  box-shadow: var(--glow-text-cyan);
  border: 2px solid var(--clr-bg-main);
}

.timeline-item:last-child {
  margin-bottom: 0;
}

/* ─── Progress Bar ───────────────────────────────────────────── */
.progress-bar {
  position: relative;
  height: 6px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  position: absolute;
  inset: 0 auto 0 0;
  background: linear-gradient(90deg, var(--clr-blue), var(--clr-cyan));
  border-radius: var(--radius-full);
  width: 0;
  transition: width 1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  box-shadow: 0 0 8px rgba(6, 182, 212, 0.4);
}

/* ─── Hover Glow Link ────────────────────────────────────────── */
.link-glow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--clr-blue-bright);
  text-decoration: none;
  transition: color var(--transition-base), gap var(--transition-base), text-shadow var(--transition-base);
}

.link-glow:hover {
  color: var(--clr-cyan-bright);
  gap: var(--sp-3);
  text-shadow: var(--glow-text-cyan);
}

/* ─── Divider ─────────────────────────────────────────────────── */
.divider {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--clr-border-bright), transparent);
  margin-block: var(--sp-8);
}

/* ─── Dot grid decorative ────────────────────────────────────── */
.dot-grid {
  position: absolute;
  width: 200px;
  height: 200px;
  background-image: radial-gradient(circle, rgba(59,130,246,0.25) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
  opacity: 0.4;
}

/* ─── Corner accent ──────────────────────────────────────────── */
.corner-accent {
  position: absolute;
  width: 40px;
  height: 40px;
  pointer-events: none;
}

.corner-accent-tl {
  top: -1px;
  left: -1px;
  border-top: 2px solid var(--clr-cyan);
  border-left: 2px solid var(--clr-cyan);
  border-radius: var(--radius-lg) 0 0 0;
}

.corner-accent-br {
  bottom: -1px;
  right: -1px;
  border-bottom: 2px solid var(--clr-cyan);
  border-right: 2px solid var(--clr-cyan);
  border-radius: 0 0 var(--radius-lg) 0;
}

/* ─── Loader / Spinner ───────────────────────────────────────── */
.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--clr-border);
  border-top-color: var(--clr-blue);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

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

/* ─── Toast Notification ─────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: var(--sp-8);
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--clr-bg-elevated);
  border: 1px solid var(--clr-border-bright);
  color: var(--clr-text-primary);
  padding: var(--sp-3) var(--sp-6);
  border-radius: var(--radius-full);
  font-size: var(--fs-sm);
  backdrop-filter: blur(12px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base), transform var(--transition-base);
  z-index: 9999;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast-success { border-color: rgba(6, 182, 212, 0.5); color: var(--clr-cyan-bright); }
.toast-error   { border-color: rgba(239, 68, 68, 0.5);  color: #fca5a5; }