/* ============================================
   COMPONENTS — Reusable UI elements
   ============================================ */

/* ─── NAVBAR ─── */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 64px;
  display: flex;
  align-items: center;
  transition:
    background-color var(--duration-slow) var(--ease-standard),
    backdrop-filter  var(--duration-slow) var(--ease-standard),
    border-color     var(--duration-slow) var(--ease-standard);
  border-bottom: 1px solid transparent;
}

.nav.is-scrolled {
  background-color: rgba(10, 10, 15, 0.88);
  backdrop-filter: blur(16px) saturate(1.4);
  -webkit-backdrop-filter: blur(16px) saturate(1.4);
  border-bottom-color: var(--border-subtle);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.nav__logo {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  transition: opacity var(--duration-fast);
}

.nav__logo:hover { opacity: 0.75; }

.nav__logo span {
  color: var(--accent);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--duration-fast);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--accent);
  transition: width var(--duration-base) var(--ease-out-expo);
}

.nav__link:hover {
  color: var(--text-primary);
}

.nav__link:hover::after { width: 100%; }

.nav__cta {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
  padding: 9px 20px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  transition:
    border-color var(--duration-base),
    background-color var(--duration-base),
    color var(--duration-base);
}

.nav__cta:hover {
  border-color: var(--accent);
  background-color: var(--accent-glow);
  color: var(--text-primary);
}

/* Mobile nav */

.nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  cursor: pointer;
}

.nav__hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--text-primary);
  transition: transform var(--duration-base), opacity var(--duration-fast);
  transform-origin: center;
}

.nav__hamburger.is-open span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.nav__hamburger.is-open span:nth-child(2) {
  opacity: 0;
}
.nav__hamburger.is-open span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

.nav__drawer {
  display: none;
  position: fixed;
  inset: 0;
  top: 64px;
  background: rgba(10, 10, 15, 0.97);
  backdrop-filter: blur(24px);
  z-index: 99;
  padding: var(--space-8) var(--space-5);
  flex-direction: column;
  gap: var(--space-6);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base);
}

.nav__drawer.is-open {
  opacity: 1;
  pointer-events: all;
}

.nav__drawer .nav__link {
  font-size: var(--text-xl);
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--text-primary);
}

.nav__drawer .btn-primary {
  margin-top: var(--space-4);
  width: 100%;
  justify-content: center;
}

@media (max-width: 768px) {
  .nav__links,
  .nav__cta { display: none; }
  .nav__hamburger { display: flex; }
  .nav__drawer { display: flex; }
}

/* ─── BUTTONS ─── */

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-text);
  font-size: var(--text-sm);
  font-weight: 600;
  color: #fff;
  background: var(--accent);
  padding: 13px 24px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition:
    background-color var(--duration-base),
    box-shadow var(--duration-base),
    transform var(--duration-fast);
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: var(--shadow-btn-hover);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-btn);
}

.btn-primary svg {
  transition: transform var(--duration-base) var(--ease-out-expo);
}

.btn-primary:hover svg {
  transform: translateX(3px);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-text);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  padding: 13px 24px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-default);
  transition:
    border-color var(--duration-base),
    color var(--duration-base),
    background-color var(--duration-base);
  white-space: nowrap;
}

.btn-secondary:hover {
  border-color: rgba(255, 255, 255, 0.30);
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--accent);
  transition: opacity var(--duration-fast);
}

.btn-link svg {
  transition: transform var(--duration-base) var(--ease-out-expo);
}

.btn-link:hover { opacity: 0.8; }
.btn-link:hover svg { transform: translateX(3px); }

/* ─── PROJECT CARDS ─── */

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition:
    border-color var(--duration-base),
    box-shadow var(--duration-base),
    transform var(--duration-base);
  display: flex;
  flex-direction: column;
}

.card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.card__image {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-surface);
}

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

.card:hover .card__image img {
  transform: scale(1.03);
}

.card__image-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    transparent 40%,
    rgba(10, 10, 15, 0.85) 100%
  );
  opacity: 0;
  transition: opacity var(--duration-base);
  display: flex;
  align-items: flex-end;
  padding: var(--space-6);
}

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

.card__image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--bg-surface) 0%, #1e1e2e 100%);
}

.card__image-placeholder .placeholder-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

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

.card__meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.card__tag {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

.card__title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.card__problem {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.5;
}

.card__metric {
  margin-top: auto;
  padding-top: var(--space-4);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
}

.card__metric-value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.03em;
  line-height: 1;
}

.card__metric-label {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  letter-spacing: 0.05em;
}

.card__footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ─── TESTIMONIAL CARDS ─── */

.testimonial {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  position: relative;
}

.testimonial__quote-mark {
  font-family: var(--font-display);
  font-size: 4rem;
  line-height: 1;
  color: var(--accent);
  opacity: 0.25;
  position: absolute;
  top: var(--space-6);
  right: var(--space-8);
  user-select: none;
}

.testimonial__text {
  font-size: var(--text-md);
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.7;
  max-width: 100%;
}

.testimonial__author {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: auto;
}

.testimonial__avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--accent);
}

.testimonial__name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.testimonial__role {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  font-family: var(--font-mono);
  margin-top: 2px;
}

/* ─── PROCESS STEPS ─── */

.process-step {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: var(--space-6);
  align-items: start;
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--border-subtle);
}

.process-step:last-child {
  border-bottom: none;
}

.process-step__number {
  font-family: var(--font-mono);
  font-size: var(--text-xs); 
  color: var(--accent);
  letter-spacing: 0.08em;
  padding-top: 4px;
}

.process-step__title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}

.process-step__desc {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 480px;
}

.process-step__time {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-2);
}

/* ─── DIVIDER ─── */

.divider {
  height: 1px;
  background: var(--border-subtle);
  margin: 0;
}

/* ─── TAGS ─── */

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  border: 1px solid var(--border-subtle);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}

/* ─── CONTACT FORM ─── */

.contact-form {
  width: 100%;
  max-width: 560px;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-size: var(--text-xs);
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
}

.form-input {
  background: var(--bg-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-family: var(--font-text);
  font-size: var(--text-sm);
  color: var(--text-primary);
  transition:
    border-color var(--duration-base),
    box-shadow var(--duration-base);
  outline: none;
  width: 100%;
}

.form-input::placeholder {
  color: var(--text-disabled);
}

.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-input.is-error {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.12);
}

.form-textarea {
  resize: vertical;
  min-height: 112px;
  line-height: 1.6;
}

.form-success {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: #6ee7b7;
}

.form-success__icon {
  font-size: var(--text-base);
  color: #10b981;
}

@media (max-width: 560px) {
  .form-row { grid-template-columns: 1fr; }
}