/* ══════════════════════════════════════════════════════════════
   SARBORUP SARKAR PORTFOLIO — components.css
   Buttons, forms, cards, shared UI components
══════════════════════════════════════════════════════════════ */

/* ── Buttons ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-head);
  font-size: var(--size-sm);
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--trans-med);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  letter-spacing: 0.01em;
}
.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.08);
  opacity: 0;
  transition: opacity var(--trans-fast);
}
.btn:hover::before { opacity: 1; }

/* Primary Button */
.btn-primary {
  background: var(--accent);
  color: #000;
}
.btn-primary:hover {
  background: var(--accent-dim);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,163,255,0.35);
}
.btn-primary:active { transform: translateY(0); }

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,163,255,0.12);
}
.btn-ghost:active { transform: translateY(0); }

/* Full width */
.btn-full { width: 100%; justify-content: center; }

/* Pulse Button (contact form) */
.pulse-btn {
  animation: pulseGlow 3s ease-in-out infinite;
}
.pulse-btn:hover {
  animation: none;
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(0,163,255,0.5);
}

/* ── Contact Form ────────────────────────────────────────────── */
.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 40px;
  transition: border-color var(--trans-fast);
}
.contact-form:focus-within {
  border-color: rgba(0,163,255,0.3);
}

.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: var(--size-xs);
  font-family: var(--font-mono);
  color: var(--text-sec);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}
.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 14px 16px;
  font-size: var(--size-sm);
  outline: none;
  resize: vertical;
  transition: border-color var(--trans-fast), box-shadow var(--trans-fast), background var(--trans-fast);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-mute);
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px var(--accent-glow2);
}
.form-group input.error,
.form-group textarea.error {
  border-color: #ff4757;
  box-shadow: 0 0 0 3px rgba(255,71,87,0.1);
}
.form-group textarea { min-height: 120px; }

/* ── Scroll-to-top button ────────────────────────────────────── */
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 50;
  width: 44px;
  height: 44px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-sec);
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--trans-fast);
  font-size: 1rem;
}
.scroll-top.visible {
  opacity: 1;
  transform: translateY(0);
}
.scroll-top:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 16px var(--accent-glow);
}

/* ── Tooltips ────────────────────────────────────────────────── */
[data-tooltip] {
  position: relative;
}
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-sec);
  font-size: 11px;
  font-family: var(--font-mono);
  padding: 4px 10px;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--trans-fast);
}
[data-tooltip]:hover::after { opacity: 1; }

/* ── Selection ───────────────────────────────────────────────── */
::selection {
  background: var(--accent-glow);
  color: var(--text);
}

/* ── Scrollbar ───────────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb {
  background: var(--surface2);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: var(--accent-dim); }

/* ── Focus visible (accessibility) ──────────────────────────── */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ── Horizontal rule ─────────────────────────────────────────── */
.divider {
  height: 1px;
  background: var(--border);
  margin: 40px 0;
}

/* ── Badge variants ──────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  font-family: var(--font-mono);
  padding: 4px 10px;
  border-radius: 100px;
  border: 1px solid;
}
.badge-blue {
  color: var(--accent);
  border-color: rgba(0,163,255,0.3);
  background: rgba(0,163,255,0.05);
}
.badge-green {
  color: #00FF87;
  border-color: rgba(0,255,135,0.3);
  background: rgba(0,255,135,0.05);
}

/* ── Number label in sections ────────────────────────────────── */
.section-number {
  font-family: var(--font-mono);
  font-size: 8rem;
  font-weight: 700;
  color: rgba(255,255,255,0.02);
  position: absolute;
  right: 0;
  top: -20px;
  line-height: 1;
  user-select: none;
  pointer-events: none;
}