/* =========================================================
   AIDigitaLife — Components
   Nav, buttons, cards, badges, tabs, accordion, form
   ========================================================= */

/* ============ NAVIGATION ============ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 0;
  background: rgba(5, 22, 52, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease-out), padding 0.3s var(--ease-out);
}

.nav.is-scrolled {
  padding: 12px 0;
  border-bottom-color: var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
  letter-spacing: -0.01em;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background:
    radial-gradient(circle at 30% 30%, var(--accent-soft), transparent 60%),
    linear-gradient(135deg, var(--accent), #0078FF);
  position: relative;
  box-shadow: 0 0 24px var(--accent-glow);
}

.brand-mark::before {
  content: '';
  position: absolute;
  inset: 6px;
  border-radius: 6px;
  background: var(--bg-deep);
}

.brand-mark::after {
  content: 'AI';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 0.7rem;
  letter-spacing: -0.02em;
  color: var(--accent);
}

.brand-name { line-height: 1; }
.brand-name small {
  display: block;
  font-size: 0.65rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.05em;
  margin-top: 3px;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
  transition: color 0.2s var(--ease-out);
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--text);
}

.nav-links a.is-active::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--accent-glow);
}

.nav-cta {
  display: inline-flex;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  position: relative;
  transition: background 0.2s;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--text);
  transition: transform 0.3s var(--ease-out);
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after  { top:  6px; }

@media (max-width: 1024px) {
  .nav-toggle    { display: inline-flex; }
  .btn.nav-cta   { display: none; }
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(5, 22, 52, 0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: 24px 32px;
    gap: 20px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-110%);
    transition: transform 0.4s var(--ease-out);
    visibility: hidden;
    z-index: 99;
  }
  .nav-links.is-open {
    transform: translateY(0);
    visibility: visible;
  }
}

@media (max-width: 480px) {
  .brand { font-size: 1rem; gap: 10px; }
  .brand-mark { width: 32px; height: 32px; }
  .brand-name small { display: none; }
  .nav-toggle { width: 40px; height: 40px; }
}

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s var(--ease-out), box-shadow 0.3s var(--ease-out), background 0.3s;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #0096DC 100%);
  color: var(--bg-deep);
  box-shadow: 0 8px 32px var(--accent-glow), inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-soft) 0%, var(--accent) 100%);
  opacity: 0;
  transition: opacity 0.3s;
}
.btn-primary:hover::before { opacity: 1; }
.btn-primary span { position: relative; z-index: 1; }
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px var(--accent-glow);
}

.btn-secondary {
  background: rgba(0, 200, 255, 0.08);
  color: var(--text);
  border: 1px solid var(--border-strong);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(0, 200, 255, 0.16);
  border-color: var(--accent);
  transform: translateY(-2px);
}

.btn-arrow { transition: transform 0.3s var(--ease-out); }
.btn:hover .btn-arrow { transform: translateX(4px); }

/* ============ CARDS ============ */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform 0.4s var(--ease-out),
              border-color 0.3s,
              background 0.3s,
              box-shadow 0.4s;
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  background: radial-gradient(
    600px circle at var(--mx, 50%) var(--my, 50%),
    rgba(0, 200, 255, 0.1),
    transparent 40%
  );
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
  pointer-events: none;
}

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

.card:hover {
  transform: translateY(-6px);
  border-color: var(--border-strong);
  background: var(--card-bg-hover);
  box-shadow: 0 20px 60px rgba(0, 100, 200, 0.2);
}

.card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  border-radius: 14px;
  background: rgba(0, 200, 255, 0.1);
  border: 1px solid var(--border);
}

.card-icon img {
  width: 32px;
  height: 32px;
  filter: drop-shadow(0 0 8px var(--accent-glow));
}

/* ============ BADGES ============ */
.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 32px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: rgba(0, 200, 255, 0.06);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.01em;
}

.badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.6; transform: scale(1.3); }
}

/* ============ TABS (What We Build) ============ */
.tabs {
  display: flex;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.tab {
  padding: 16px 32px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 14px;
  color: var(--text-muted);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
  display: flex;
  align-items: center;
  gap: 12px;
}

.tab-letter {
  font-size: 1.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), #0096DC);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tab:hover {
  border-color: var(--border-strong);
  color: var(--text);
}

.tab.is-active {
  background: rgba(0, 200, 255, 0.1);
  border-color: var(--accent);
  color: var(--text);
  box-shadow: 0 0 24px var(--accent-glow);
}

.tab-panels { position: relative; min-height: 400px; }

@media (max-width: 640px) {
  .tabs { gap: 8px; margin-bottom: 28px; }
  .tab { padding: 12px 16px; font-size: 0.85rem; gap: 8px; flex: 1; justify-content: center; }
  .tab-letter { font-size: 1.1rem; }
  .tab-panels { min-height: 0; }
}

/* All panels visible by default; JS hides non-active ones */
.tab-panel {
  display: block;
  animation: fadeUp 0.6s var(--ease-out);
}

.js-ready .tab-panel { display: none; }
.js-ready .tab-panel.is-active { display: block; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============ ACCORDION (Cases) ============ */
.accordion-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color 0.3s, background 0.3s;
}

.accordion-item:hover { border-color: var(--border-strong); }
.accordion-item.is-open {
  border-color: var(--accent);
  background: var(--card-bg-hover);
  box-shadow: 0 10px 40px rgba(0, 100, 200, 0.15);
}

.accordion-header {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 28px;
  cursor: pointer;
  user-select: none;
}

.accordion-icon-wrap {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(0, 200, 255, 0.1);
  border: 1px solid var(--border);
  flex-shrink: 0;
}

.accordion-icon-wrap img {
  width: 30px;
  height: 30px;
  filter: drop-shadow(0 0 8px var(--accent-glow));
}

.accordion-title-wrap { flex: 1; }
.accordion-case-num {
  display: block;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 4px;
}
.accordion-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text);
  margin-bottom: 2px;
}
.accordion-subtitle {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.accordion-chevron {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border);
  transition: transform 0.3s var(--ease-out), background 0.3s;
}

.accordion-chevron::before {
  content: '';
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform 0.3s var(--ease-out);
}

.accordion-item.is-open .accordion-chevron {
  background: rgba(0, 200, 255, 0.1);
}
.accordion-item.is-open .accordion-chevron::before {
  transform: rotate(-135deg) translate(-2px, -2px);
}

.accordion-body {
  max-height: 2000px;
  overflow: hidden;
  transition: max-height 0.5s var(--ease-out);
}

/* JS-driven collapsed state */
.js-ready .accordion-body {
  max-height: 0;
}

.js-ready .accordion-item.is-open .accordion-body {
  max-height: 2000px;
  transition: max-height 0.8s var(--ease-out);
}

.accordion-content {
  padding: 0 28px 32px 28px;
  border-top: 1px solid var(--border);
  padding-top: 28px;
}

@media (max-width: 640px) {
  .accordion-header { padding: 18px 16px; gap: 14px; }
  .accordion-icon-wrap { width: 44px; height: 44px; }
  .accordion-icon-wrap img { width: 22px; height: 22px; }
  .accordion-title { font-size: 1rem; line-height: 1.25; }
  .accordion-subtitle { font-size: 0.78rem; }
  .accordion-case-num { font-size: 0.62rem; letter-spacing: 0.12em; }
  .accordion-chevron { width: 32px; height: 32px; }
  .accordion-chevron::before { width: 8px; height: 8px; }
  .accordion-content { padding: 22px 16px 24px 16px; }
}

/* ============ COUNTER ============ */
.counter {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-soft) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 6px;
  letter-spacing: -0.03em;
}

.counter-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

@media (max-width: 480px) {
  .counter { font-size: 1.6rem; }
  .counter-label { font-size: 0.78rem; }
}

/* ============ FORM ============ */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-field.full { grid-column: 1 / -1; }

.form-field label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.form-field input,
.form-field textarea {
  background: rgba(5, 22, 52, 0.6);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 18px;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color 0.3s, background 0.3s, box-shadow 0.3s;
  width: 100%;
}

.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(5, 22, 52, 0.9);
  box-shadow: 0 0 0 4px rgba(0, 200, 255, 0.1);
}

.form-field textarea {
  resize: vertical;
  min-height: 140px;
  font-family: var(--font-body);
}

.form-status {
  margin-top: 16px;
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 0.9rem;
  display: none;
}

.form-status.is-visible { display: block; }
.form-status.is-success {
  background: rgba(0, 200, 120, 0.1);
  border: 1px solid rgba(0, 200, 120, 0.4);
  color: #4FDFA0;
}
.form-status.is-error {
  background: rgba(255, 80, 80, 0.1);
  border: 1px solid rgba(255, 80, 80, 0.4);
  color: #FF8A8A;
}

@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
}