/* ================================================
   OPENENVELOPE — COMPONENT LIBRARY
   ================================================ */

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  padding: 0.75rem 1.85rem;
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  border-radius: var(--r-md);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  white-space: nowrap;
  transition: transform var(--t-fast), box-shadow var(--t-fast), opacity var(--t-fast);
  text-decoration: none;
}
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--grad-brand);
  color: #fff;
  box-shadow: 0 2px 18px rgba(124,58,237,0.28);
}
.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--grad-hover);
  opacity: 0;
  transition: opacity var(--t-fast);
}
.btn-primary span, .btn-primary svg { position: relative; z-index: 1; }
.btn-primary:hover::after { opacity: 1; }
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 32px rgba(124,58,237,0.38);
}

.btn-secondary {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--text-primary);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.16);
  transform: translateY(-2px);
}

.btn-outline-violet {
  background: transparent;
  border: 1px solid var(--border-glow);
  color: var(--violet-light);
}
.btn-outline-violet:hover {
  background: rgba(124,58,237,0.1);
  border-color: var(--violet-light);
}

.btn-ghost {
  background: none;
  color: var(--cyan);
  font-weight: 600;
  font-size: 0.9rem;
  gap: var(--sp-2);
  padding: 0;
}
.btn-ghost svg { transition: transform var(--t-fast); }
.btn-ghost:hover svg { transform: translateX(4px); }

.btn-lg { padding: 1rem 2.5rem; font-size: 1rem; }
.btn-sm { padding: 0.5rem 1.25rem; font-size: 0.82rem; }

/* ── BADGE ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.28rem 0.85rem;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  border-radius: 9999px;
}
.badge-violet {
  background: rgba(124,58,237,0.12);
  border: 1px solid rgba(124,58,237,0.25);
  color: var(--violet-light);
}
.badge-cyan {
  background: rgba(34,211,238,0.10);
  border: 1px solid rgba(34,211,238,0.22);
  color: var(--cyan);
}
.badge-blue {
  background: rgba(37,99,235,0.12);
  border: 1px solid rgba(37,99,235,0.25);
  color: var(--blue-light);
}

/* ── CARDS ── */
.card {
  background: var(--grad-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--panel-pad-y) var(--panel-pad-x);
  position: relative;
  overflow: hidden;
  transition: transform var(--t-mid), border-color var(--t-mid), box-shadow var(--t-mid);
}
/* Mouse-tracking spotlight */
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    500px circle at var(--mx,50%) var(--my,50%),
    rgba(255,255,255,0.04),
    transparent 45%
  );
  opacity: 0;
  transition: opacity var(--t-fast);
  pointer-events: none;
  z-index: 0;
}
.card:hover::before { opacity: 1; }
.card:hover {
  transform: translateY(-6px);
  border-color: var(--border-glow);
  box-shadow: 0 20px 50px -12px rgba(124,58,237,0.2);
}
.card > * { position: relative; z-index: 1; }

/* Glass variant */
.card-glass {
  background: rgba(13,17,36,0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.09);
}

/* Glow accent top border */
.card-accent::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: var(--grad-brand);
  opacity: 0;
  transition: opacity var(--t-mid);
}
.card-accent:hover::after { opacity: 1; }

/* Number tag */
.card-num {
  font-size: 0.95rem;
  font-weight: 700;
  font-family: 'Inter', system-ui, sans-serif;
  color: var(--cyan);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  display: block;
  margin-bottom: var(--sp-4);
  text-shadow: 0 0 10px rgba(34,211,238,0.3);
}

/* Icon box */
.icon-box {
  width: 50px; height: 50px;
  border-radius: var(--r-md);
  background: rgba(124,58,237,0.1);
  border: 1px solid rgba(124,58,237,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: background var(--t-fast), transform var(--t-fast), border-color var(--t-fast);
}
.icon-box svg {
  width: 22px; height: 22px;
  stroke: var(--violet-light);
  fill: none;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.card:hover .icon-box {
  background: rgba(124,58,237,0.18);
  border-color: rgba(168,85,247,0.35);
  transform: scale(1.08);
}

.icon-box-cyan {
  background: rgba(34,211,238,0.08);
  border-color: rgba(34,211,238,0.18);
}
.icon-box-cyan svg { stroke: var(--cyan); }

/* ── ACCORDION ── */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  max-width: 820px;
  margin-inline: auto;
}
.faq-item {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color var(--t-fast);
}
.faq-item:hover { border-color: rgba(255,255,255,0.14); }
.faq-item[open]  { border-color: rgba(124,58,237,0.28); }
.faq-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-4);
  padding: var(--sp-5) var(--sp-6);
  background: none;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  cursor: pointer;
}
.faq-icon {
  flex-shrink: 0;
  width: 18px; height: 18px;
  stroke: var(--text-muted);
  fill: none;
  transition: transform var(--t-fast), stroke var(--t-fast);
}
.faq-item[open] .faq-icon {
  transform: rotate(45deg);
  stroke: var(--cyan);
}
.faq-body {
  padding: 0 var(--sp-6) var(--sp-5);
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.78;
}

/* ── BREADCRUMBS ── */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: var(--sp-8);
  flex-wrap: wrap;
}
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb-sep { color: var(--border); }

/* ── TAGS ── */
.tags { display: flex; flex-wrap: wrap; gap: var(--sp-2); margin-top: var(--sp-4); }
.tag {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 0.22rem 0.7rem;
  border-radius: 9999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--text-muted);
  transition: all var(--t-fast);
}
.tag:hover {
  border-color: var(--border-glow);
  color: var(--violet-light);
  background: rgba(124,58,237,0.07);
}

/* ── TECH PILLS ── */
.tech-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 0.4rem 1rem;
  font-size: 0.82rem;
  font-weight: 500;
  border-radius: 9999px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: all var(--t-fast);
}
.tech-pill:hover {
  background: rgba(124,58,237,0.08);
  border-color: rgba(124,58,237,0.28);
  color: var(--text-primary);
}

/* ── STAT BLOCK ── */
.stat-value {
  font-size: clamp(2rem,5vw,3.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  background: var(--grad-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}
.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: var(--sp-2);
  font-weight: 500;
}

/* ── PROCESS STEP ── */
.step-item {
  display: flex;
  gap: var(--sp-5);
  position: relative;
}
.step-num-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
}
.step-num {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 1px solid var(--border-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  font-family: 'Courier New', monospace;
  color: var(--violet-light);
  flex-shrink: 0;
  z-index: 1;
}
.step-line {
  flex: 1;
  width: 1px;
  background: linear-gradient(to bottom, var(--border-glow), transparent);
  margin-top: var(--sp-2);
  min-height: 40px;
}
.step-content { padding-bottom: var(--sp-10); flex: 1; }
.step-title { font-size: 1.05rem; font-weight: 700; margin-bottom: var(--sp-2); }
.step-desc  { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }

/* ── FORM ELEMENTS ── */
.field { margin-bottom: var(--sp-5); }
.field-label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: var(--sp-2);
}
.field-input,
.field-textarea,
.field-select {
  width: 100%;
  padding: 0.85rem 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  color: var(--text-primary);
  font-size: 0.94rem;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.field-input:focus,
.field-textarea:focus,
.field-select:focus {
  border-color: rgba(124,58,237,0.5);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.08);
}
.field-input::placeholder,
.field-textarea::placeholder { color: var(--text-dim); }
.field-textarea { resize: vertical; min-height: 130px; }
.field-select option { background: var(--bg-surface); }
.field-error {
  display: none;
  font-size: 0.77rem;
  color: #f87171;
  margin-top: var(--sp-2);
}
.field.invalid .field-error    { display: block; }
.field.invalid .field-input,
.field.invalid .field-textarea { border-color: rgba(248,113,113,0.45); }

.form-notice {
  background: rgba(124,58,237,0.07);
  border: 1px solid rgba(124,58,237,0.18);
  border-radius: var(--r-md);
  padding: var(--sp-4) var(--sp-5);
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--sp-6);
}
.form-status {
  margin-top: var(--sp-5);
  padding: var(--sp-4) var(--sp-5);
  border-radius: var(--r-md);
  font-size: 0.9rem;
  line-height: 1.55;
}
.form-status-success {
  background: rgba(34,197,94,0.08);
  border: 1px solid rgba(34,197,94,0.22);
  color: #4ade80;
}
.form-status-error {
  background: rgba(239,68,68,0.08);
  border: 1px solid rgba(239,68,68,0.22);
  color: #f87171;
}