/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  padding: var(--sp-3) var(--sp-6);
  border-radius: var(--radius-sm);
  transition: all var(--t-fast) var(--ease-out);
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
}

.btn--primary {
  background: var(--gradient-accent);
  color: var(--color-bg);
}

.btn--primary:hover {
  opacity: 0.88;
  box-shadow: var(--shadow-glow);
  color: var(--color-bg);
  transform: translateY(-1px);
}

.btn--outline {
  border: 1px solid var(--color-border-glow);
  color: var(--color-secondary);
  background: transparent;
}

.btn--outline:hover {
  background: rgba(0,212,255,0.06);
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  transform: translateY(-1px);
}

.btn--lg {
  padding: var(--sp-4) var(--sp-8);
  font-size: var(--fs-base);
}

/* ===== SERVICE CARD ===== */
.service-card {
  background: var(--gradient-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-8) var(--sp-6);
  position: relative;
  overflow: hidden;
  transition: border-color var(--t-normal) var(--ease-out),
              box-shadow var(--t-normal) var(--ease-out),
              transform var(--t-normal) var(--ease-out);
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity var(--t-normal) var(--ease-out);
}

.service-card:hover {
  border-color: var(--color-border-glow);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

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

.service-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(30,144,255,0.12);
  border: 1px solid rgba(30,144,255,0.2);
  margin-bottom: var(--sp-5);
  color: var(--color-secondary);
}

.service-card__icon svg {
  width: 24px;
  height: 24px;
}

.service-card__title {
  font-family: var(--font-mono);
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
  margin-bottom: var(--sp-3);
  line-height: var(--lh-tight);
}

.service-card__desc {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-loose);
}

/* ===== INFO CARD (about section) ===== */
.info-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--sp-6);
  position: relative;
}

.info-card__tag {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--color-secondary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--sp-3);
}

.info-card__title {
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
  margin-bottom: var(--sp-2);
}

.info-card__text {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-normal);
}

.info-card--accent {
  border-left: 3px solid var(--color-primary);
  background: linear-gradient(90deg, rgba(30,144,255,0.06), transparent);
}

/* ===== WHY ITEM ===== */
.why-item {
  display: flex;
  gap: var(--sp-5);
  align-items: flex-start;
}

.why-item__icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.15);
  color: var(--color-secondary);
}

.why-item__icon svg { width: 22px; height: 22px; }

.why-item__title {
  font-family: var(--font-mono);
  font-size: var(--fs-base);
  font-weight: var(--fw-semibold);
  color: var(--color-text);
  margin-bottom: var(--sp-2);
}

.why-item__text {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-loose);
}

/* ===== CONTACT FORM ===== */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

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

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

.form-input,
.form-textarea {
  font-family: var(--font-body);
  font-size: var(--fs-sm);
  color: var(--color-text);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--sp-3) var(--sp-4);
  outline: none;
  transition: border-color var(--t-fast) var(--ease-out),
              box-shadow var(--t-fast) var(--ease-out);
  width: 100%;
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-dim);
}

.form-input:focus,
.form-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30,144,255,0.12);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* ===== HERO ILLUSTRATION (SVG BG) ===== */
.hero-visual {
  position: relative;
  width: 100%;
  aspect-ratio: 4/3;
}

.hero-visual__frame {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--gradient-card);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-visual__inner {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  padding: var(--sp-8);
  width: 100%;
}

.code-line {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  line-height: 1.5;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.code-line__num {
  color: var(--color-text-dim);
  min-width: 20px;
  text-align: right;
  user-select: none;
}

.code-line__text { color: var(--color-text-muted); }
.code-line__kw   { color: #7C9DF7; }
.code-line__str  { color: #7DDBA0; }
.code-line__fn   { color: var(--color-secondary); }
.code-line__num-val { color: #F4A856; }

.hero-visual__glow {
  position: absolute;
  bottom: -20%;
  right: -10%;
  width: 200px;
  height: 200px;
  background: radial-gradient(ellipse, rgba(30,144,255,0.25) 0%, transparent 70%);
  pointer-events: none;
}

/* ===== TAG / BADGE ===== */
.badge {
  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(--color-secondary);
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: var(--radius-pill);
  padding: var(--sp-1) var(--sp-3);
  letter-spacing: 0.06em;
}

.badge__dot {
  width: 6px;
  height: 6px;
  background: var(--color-secondary);
  border-radius: 50%;
}