/* ==========================================================================
   Komponenty: tlačítka, formulář, placeholder fotky, signature motiv
   ========================================================================== */

/* ---- Tlačítka ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.75rem;
  font-family: var(--font-heading);
  font-size: var(--text-body);
  font-weight: 600;
  text-decoration: none;
  border: 1.5px solid transparent;
  border-radius: var(--radius);
  white-space: nowrap;
  transition: transform var(--duration-fast) var(--ease-standard),
    background var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: var(--color-yellow);
  color: var(--color-navy-dark);
  border-color: var(--color-yellow);
}

.btn--primary:hover {
  background: var(--color-yellow-dark);
  border-color: var(--color-yellow-dark);
}

.btn--secondary {
  background: transparent;
  color: var(--color-navy);
  border-color: var(--color-navy);
}

.btn--secondary:hover {
  background: var(--color-navy);
  color: var(--color-white);
}

.btn--on-dark {
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn--on-dark:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-white);
}

.btn--block {
  width: 100%;
}

.btn[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ---- Rohové registrační značky (signature motiv A) ---- */
.reg-frame {
  position: relative;
}

.reg-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  --m: 18px;
  --mw: 2px;
  background-image: linear-gradient(var(--color-yellow), var(--color-yellow)),
    linear-gradient(var(--color-yellow), var(--color-yellow)),
    linear-gradient(var(--color-yellow), var(--color-yellow)),
    linear-gradient(var(--color-yellow), var(--color-yellow)),
    linear-gradient(var(--color-yellow), var(--color-yellow)),
    linear-gradient(var(--color-yellow), var(--color-yellow)),
    linear-gradient(var(--color-yellow), var(--color-yellow)),
    linear-gradient(var(--color-yellow), var(--color-yellow));
  background-repeat: no-repeat;
  background-size: var(--m) var(--mw), var(--mw) var(--m), var(--m) var(--mw),
    var(--mw) var(--m), var(--m) var(--mw), var(--mw) var(--m), var(--m) var(--mw),
    var(--mw) var(--m);
  background-position: top 0 left 0, top 0 left 0, top 0 right 0, top 0 right 0,
    bottom 0 left 0, bottom 0 left 0, bottom 0 right 0, bottom 0 right 0;
  opacity: 1;
}

.reg-frame--hover::before {
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-standard);
}

.reg-frame--hover:hover::before,
.reg-frame--hover:focus-within::before {
  opacity: 1;
}

/* ---- Kótovací linka (signature motiv B) ---- */
.dim-rule {
  display: block;
  width: 124px;
  height: 14px;
  margin-block: var(--space-sm) 0;
  color: var(--color-navy);
}

.dim-rule--light {
  color: var(--color-white);
}

/* ---- Placeholder fotky ---- */
.photo-frame {
  aspect-ratio: var(--ar, 4/3);
  border: 1px dashed var(--color-grey-light);
  background: var(--color-offwhite);
  display: grid;
  place-items: center;
  margin: 0;
}

.photo-frame__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  color: var(--color-grey-dark);
  text-align: center;
  padding: 1rem;
}

.photo-frame__icon {
  width: 32px;
  height: 32px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}

.photo-frame__label {
  font-size: var(--text-small);
  max-width: 22ch;
  line-height: 1.4;
}

/* ---- Reálná fotka (nahrazuje placeholder, jakmile je podklad k dispozici) ---- */
.photo-frame--filled {
  display: block;
  border: 0;
  background: none;
  overflow: hidden;
}

.photo-frame--filled img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---- Formulář ---- */
.form-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-bottom: var(--space-md);
}

.form-field label {
  font-size: var(--text-small);
  font-weight: 600;
  color: var(--color-navy);
}

.form-field .form-hint {
  font-size: var(--text-small);
  color: var(--color-grey-dark);
}

.form-field input,
.form-field select,
.form-field textarea {
  font: inherit;
  font-size: var(--text-body);
  padding: 0.85rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-white);
  color: var(--color-ink);
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: var(--color-grey-dark);
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--color-navy);
  outline: none;
  box-shadow: 0 0 0 3px var(--color-navy-tint);
}

.form-field textarea {
  resize: vertical;
  min-height: 140px;
}

.form-field.has-error input,
.form-field.has-error select,
.form-field.has-error textarea {
  border-color: var(--color-error);
}

.form-field__error {
  font-size: var(--text-small);
  color: var(--color-error);
  display: none;
}

.form-field.has-error .form-field__error {
  display: block;
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  font-size: var(--text-small);
  color: var(--color-grey-dark);
}

.form-checkbox input {
  margin-top: 0.2rem;
  width: 18px;
  height: 18px;
  accent-color: var(--color-navy);
  flex-shrink: 0;
}

.form-checkbox a {
  color: var(--color-navy);
  font-weight: 600;
}

/* honeypot: skryté vizuálně i pro AT. Reálný uživatel se k němu nikdy nedostane. */
.form-honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-status {
  margin-top: var(--space-sm);
  padding: 0.9rem 1.1rem;
  font-size: var(--text-small);
  display: none;
}

.form-status--success {
  display: block;
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid var(--color-success);
}

.form-status--error {
  display: block;
  background: var(--color-error-bg);
  color: var(--color-error);
  border: 1px solid var(--color-error);
}

.form-progress {
  height: 2px;
  background: var(--color-border);
  overflow: hidden;
  margin-top: var(--space-xs);
  display: none;
}

.form-progress span {
  display: block;
  height: 100%;
  width: 40%;
  background: var(--color-yellow-dark);
  animation: form-progress-slide 1.1s ease-in-out infinite;
}

.is-submitting .form-progress {
  display: block;
}

@keyframes form-progress-slide {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(350%);
  }
}

/* ---- Scroll reveal ---- */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-base) var(--ease-standard),
    transform var(--duration-base) var(--ease-standard);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}