/* ============================================================
   components.css — Reusable components: buttons, badges, cards
   ============================================================ */

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast),
              color var(--transition-fast),
              border-color var(--transition-fast),
              transform var(--transition-fast),
              box-shadow var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  border: 2px solid transparent;
}

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

/* Primary button */
.btn--primary {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(108, 99, 255, 0.35);
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: none;
}

/* Secondary / outline button */
.btn--secondary {
  background-color: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
}

.btn--secondary:active {
  transform: translateY(0);
}

/* Outline button — accent-coloured border, transparent bg */
.btn--outline {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn--outline:hover,
.btn--outline:focus-visible {
  background-color: var(--color-accent-subtle);
  color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-2px);
}

.btn--outline:active {
  transform: translateY(0);
}

/* Ghost button — no border, subtle text, hover reveals bg */
.btn--ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border-color: var(--color-border);
  transform: translateY(-2px);
}

.btn--ghost:active {
  transform: translateY(0);
}

/* Small size modifier */
.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: 0.8125rem;
}

/* ---- Navigation ---- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  background-color: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav {
  height: 100%;
}

.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.nav__logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text-primary);
  text-decoration: none;
  letter-spacing: -0.01em;
  transition: color var(--transition-fast);
}

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

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

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
  padding-block: var(--space-1);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-text-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link.active {
  color: var(--color-text-primary);
}

/* Hamburger button */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: var(--space-1);
  background: none;
  border: none;
  cursor: pointer;
}

.hamburger-btn__bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

/* ---- Footer ---- */
.site-footer {
  padding-block: var(--space-8);
  text-align: center;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* ---- Badge / Pill ---- */
.badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: 0.8125rem;
  font-weight: 500;
  font-family: var(--font-mono);
  color: var(--color-accent);
  background-color: var(--color-accent-subtle);
  border: 1px solid rgba(108, 99, 255, 0.25);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

/* ---- Mobile Responsive ---- */
@media (max-width: 767px) {
  .hamburger-btn {
    display: flex;
  }

  .nav__links {
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background-color: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4) var(--space-6);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base), padding var(--transition-base);
  }

  .nav__links.is-open {
    max-height: 300px;
    padding-block: var(--space-4);
  }

  .nav__links li {
    width: 100%;
  }

  .nav-link {
    display: block;
    padding-block: var(--space-3);
    font-size: 1rem;
  }
}

/* ============================================================
   Contact Form Components
   ============================================================ */

/* Form wrapper — stacks fields vertically */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

/* Individual field group: label + input + error */
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* Label — small, muted, uppercase */
.form-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

/* Base input / textarea styles */
.form-input {
  width: 100%;
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: 0.9375rem;
  font-family: var(--font-sans);
  line-height: 1.5;
  transition: border-color var(--transition-fast),
              box-shadow var(--transition-fast);
  box-sizing: border-box;
}

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

.form-input:hover {
  border-color: var(--color-text-muted);
}

.form-input:focus,
.form-input:focus-visible {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.2);
}

/* Invalid state — shown when field has aria-invalid="true" or .is-invalid class */
.form-input[aria-invalid="true"],
.form-input.is-invalid {
  border-color: var(--color-error);
  box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.15);
}

/* Textarea — same as input but vertically resizable */
.form-textarea {
  resize: vertical;
  min-height: 8rem;
}

/* Inline field error message */
.field-error {
  display: block;
  font-size: 0.8125rem;
  color: var(--color-error);
  min-height: 1.25em; /* reserve space to avoid layout shift */
}

.field-error:empty {
  display: none;
}

/* ---- Form status banner (success / error) ---- */
.form-status {
  display: none;
  padding: var(--space-4);
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  line-height: 1.5;
  border: 1px solid transparent;
  margin-bottom: var(--space-4);
}

/* Show when a modifier class is present */
.form-status--success,
.form-status--error {
  display: block;
}

.form-status--success {
  color: var(--color-success);
  background-color: rgba(74, 222, 128, 0.08);
  border-color: rgba(74, 222, 128, 0.3);
}

.form-status--error {
  color: var(--color-error);
  background-color: rgba(248, 113, 113, 0.08);
  border-color: rgba(248, 113, 113, 0.3);
}