/* ===== Model 4: Video → Video (final) ===== */

/* Container */
.m4-container {
  width: min(var(--rv-maxw-wide), 96%);
  margin: 24px auto 80px;
}

.m4-title {
  text-align: center;
  margin-top: 150px;
  /* ihtiyacına göre 60–100px arasında ayarla */
}


/* Top section: preview left, panel right */
.m4-top {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 18px;
  align-items: start;
}

.m4-card {
  background: var(--rv-card);
  border: 1px solid var(--rv-border);
  border-radius: var(--rv-radius);
  box-shadow: var(--rv-shadow);
  padding: 14px;
}

/* Preview box */
.m4-preview-box {
  width: 100%;
  aspect-ratio: 1 / 1;
  min-height: 520px;
  border: 1px solid var(--rv-border);
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(255, 255, 255, .06), rgba(255, 255, 255, .02));
  position: relative;
  overflow: hidden;
  display: grid;
  place-items: center;
}

.m4-preview-placeholder {
  color: var(--rv-muted);
  text-align: center;
  display: grid;
  gap: 10px;
  place-items: center;
}

.m4-preview-placeholder .m4-drop {
  border: 1px dashed var(--rv-border);
  border-radius: 12px;
  padding: 16px 18px;
  width: min(460px, 92%);
  background: rgba(255, 255, 255, .03);
}

.m4-preview-media {
  position: absolute;
  inset: 0;
  display: none;
}

.m4-preview-video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

/* Loader overlay (API in progress) */
.m4-loader {
  /* hidden by default; made visible by JS */
  display: none;
  position: absolute;
  inset: 0;
  z-index: 10;
  background: rgba(0, 0, 0, 0.6);
  color: var(--rv-text);
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  justify-content: center;
}

.m4-loader .spinner {
  width: 48px;
  height: 48px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top: 4px solid var(--rv-primary);
  border-radius: 50%;
  animation: m4spin 1s linear infinite;
}

@keyframes m4spin {
  to {
    transform: rotate(360deg);
  }
}

/* Panel fields */
.m4-field {
  margin: 8px 0 12px;
}

.m4-label {
  font-weight: 700;
  font-size: .95rem;
  margin: 0 0 6px;
  display: block;
}

.m4-input,
.m4-select {
  width: 100%;
  border: 1px solid var(--rv-border);
  border-radius: 12px;
  background: var(--rv-bg-soft);
  color: var(--rv-text);
  padding: 10px 12px;
  outline: none;
}

/* Buttons */
.m4-btn {
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--rv-border);
  background: var(--rv-bg-soft);
  color: var(--rv-text);
  cursor: pointer;
  transition: .15s transform ease, .2s background ease;
}

.m4-btn:hover {
  transform: translateY(-1px);
}

.m4-btn--primary {
  background: linear-gradient(135deg, var(--rv-primary), var(--rv-primary-2));
  border-color: transparent;
  box-shadow: 0 6px 18px rgba(124, 77, 255, .3);
}

.m4-btn--ghost {
  background: transparent;
}

.m4-btn[disabled] {
  opacity: .6;
  cursor: not-allowed;
}

input[type="file"] {
  display: none;
}

.m4-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Advanced settings */
.m4-details {
  border: 1px solid var(--rv-border);
  border-radius: 12px;
  background: var(--rv-bg-soft);
  padding: 10px;
  margin-top: 10px;
}

.m4-details summary {
  cursor: pointer;
  font-weight: 700;
}

.m4-details .m4-adv-grid {
  margin-top: 10px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

@media (max-width: 720px) {
  .m4-details .m4-adv-grid {
    grid-template-columns: 1fr;
  }
}

/* Current result */
.m4-pair-wrap {
  margin: 24px 0 8px;
}

.m4-pair-wrap.m4-hidden {
  display: none;
}

.m4-pair-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  width: 94%;
  margin: 0 auto;
}

.m4-pcard {
  background: var(--rv-card);
  border: 1px solid var(--rv-border);
  border-radius: 12px;
  box-shadow: var(--rv-shadow);
  padding: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.m4-pthumb {
  width: 100%;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--rv-border);
  border-radius: 10px;
  overflow: hidden;
  background: #000;
  display: grid;
  place-items: center;
}

.m4-pthumb video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

.m4-ptitle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
}

.m4-pair-actions {
  display: grid;
  place-items: center;
  margin: 10px auto 0;
  width: 94%;
}

/* History */
.m4-history {
  display: grid;
  gap: 16px;
}

.m4-loadmore-wrap {
  display: grid;
  place-items: center;
  margin: 14px 0;
}

.m4-hidden {
  display: none !important;
}

/* Hide History header and loadmore when history is empty */
.m4-history:empty {
  display: none;
}

.m4-history:empty+.m4-loadmore-wrap {
  display: none;
}

.rv-sec-title:has(+ .m4-history:empty) {
  display: none;
}

/* Small hint text */
.hint-small {
  color: var(--rv-muted);
  font-size: 0.9rem;
}

/* How-to (media left, text right, equal heights) */
.rv-howto.rv-howto--row {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: stretch;
  /* equal heights */
  gap: 24px;
  width: 100%;
  box-sizing: border-box;
  padding: 200px 0;
  /* custom spacing per your preference */
}

.rv-howto--row .rv-howto__media {
  flex: 0 0 35%;
  max-width: 35%;
}

.rv-howto--row .rv-howto__text {
  flex: 1 1 60%;
  max-width: 50%;
  margin-top: 0;
}

/* Non-square media box (custom size) */
.rv-video-box {
  width: 140%;
  height: 450px;
  /* custom height per your preference */
  background: rgba(255, 255, 255, .03);
  border: 1px solid var(--rv-border);
  border-radius: var(--rv-radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Responsive */
@media (max-width: 1024px) {
  .m4-top {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .rv-howto.rv-howto--row {
    flex-direction: column;
    padding: 120px 0;
  }

  .rv-howto--row .rv-howto__media,
  .rv-howto--row .rv-howto__text {
    max-width: 100%;
    flex: 1 1 100%;
  }

  .rv-video-box {
    width: 100%;
    height: 200px;
  }
}

@media (max-width: 640px) {
  .m4-pair-grid {
    grid-template-columns: 1fr;
  }
}