:root {
    --mpu-bg: #ffffff;
    --mpu-text: #222222;
    --mpu-muted: #666666;
    --mpu-accent: #0073aa;
    --mpu-accent-dark: #005f8a;
    --mpu-card: #ffffff;
    --mpu-overlay: rgba(0,0,0,0.75);
}

/* Dark theme support */
@media (prefers-color-scheme: dark) {
    :root {
        --mpu-bg: #0f1113;
        --mpu-text: #e6e6e6;
        --mpu-muted: #bdbdbd;
        --mpu-accent: #1e90ff;
        --mpu-accent-dark: #1a73d8;
        --mpu-card: #111214;
        --mpu-overlay: rgba(0,0,0,0.85);
    }
}

body {
    background: var(--mpu-bg);
    color: var(--mpu-text);
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

#mpu-uploader {
    border: 1px solid rgba(0,0,0,0.06);
    padding: 15px;
    margin-bottom: 20px;
    background: var(--mpu-card);
    border-radius: 8px;
}

#mpu-uploader h3 { margin-top: 0; color: var(--mpu-text); }
#mpu-uploader .mpu-note { font-size: 13px; color: var(--mpu-muted); margin-bottom: 8px; }

#mpu-upload-row { position: relative; display: inline-block; }
#mpu-files { margin-top: 8px; padding: 8px; border-radius: 6px; border: 1px dashed #ddd; background: transparent; color: var(--mpu-text); }

/* Arrow */
.mpu-upload-arrow { position: absolute; right: -48px; top: 6px; width: 36px; height: 36px; pointer-events: none; opacity: 0; }
.mpu-upload-arrow::before, .mpu-upload-arrow::after { content: ''; position: absolute; left: 50%; transform: translateX(-50%); border-left: 8px solid transparent; border-right: 8px solid transparent; }
.mpu-upload-arrow::before { bottom: 0; border-top: 12px solid var(--mpu-accent); opacity: 0.95; }
.mpu-upload-arrow::after { bottom: -14px; width: 2px; height: 18px; background: var(--mpu-accent); left: 50%; transform: translateX(-50%); border: none; }
.mpu-arrow-animate { animation: mpu-arrow-fade 1.2s ease-in-out infinite; opacity: 1; }
@keyframes mpu-arrow-fade { 0% { transform: translateY(0); opacity: 0; } 20% { transform: translateY(-6px); opacity: 1; } 60% { transform: translateY(0); opacity: 1; } 100% { transform: translateY(0); opacity: 0; } }

#mpu-start-upload { margin-top: 10px; padding: 8px 12px; background: var(--mpu-accent); color: #fff; border: none; border-radius: 6px; cursor: pointer; font-weight: 600; }

.mpu-queue { margin-top: 14px; }
.mpu-queue-item { margin-top: 10px; padding: 10px; border: 1px solid rgba(0,0,0,0.04); border-radius: 8px; background: linear-gradient(180deg, rgba(255,255,255,0.02), transparent); color: var(--mpu-text); }
.mpu-file-name { display: block; font-weight: 600; margin-bottom: 8px; }
.mpu-progress-bar { width: 100%; height: 8px; background: #eee; border-radius: 6px; overflow: hidden; background: linear-gradient(90deg, rgba(0,0,0,0.03), rgba(0,0,0,0.02)); }
.mpu-progress-inner { width: 0; height: 100%; background: linear-gradient(90deg, var(--mpu-accent), var(--mpu-accent-dark)); transition: width 0.2s linear; }

.mpu-section { margin: 28px 0; border-bottom: 1px solid rgba(0,0,0,0.06); padding-bottom: 18px; background: var(--mpu-card); border-radius: 6px; overflow: hidden; padding: 12px; }
.mpu-section-header { display: flex; justify-content: space-between; align-items: center; padding: 8px 12px; color: var(--mpu-muted); font-size: 14px; }
.mpu-section-meta { display: flex; justify-content: space-between; align-items: center; padding: 6px 12px 12px; font-size: 14px; }
.mpu-photo-count { font-weight: 700; color: var(--mpu-text); }

.mpu-view-btn { padding: 8px 14px; background: var(--mpu-accent); color: #fff; border: none; border-radius: 8px; cursor: pointer; font-weight: 700; letter-spacing: 0.5px; position: relative; overflow: visible; box-shadow: 0 6px 18px rgba(0,0,0,0.12); }
.mpu-view-btn::after { content: ""; position: absolute; left: -6px; top: -6px; right: -6px; bottom: -6px; border-radius: 12px; background: radial-gradient(circle at center, rgba(0,0,0,0.06), transparent 40%); opacity: 0; transform: scale(0.9); transition: opacity 0.25s ease, transform 0.25s ease; }
.mpu-view-btn:hover::after { opacity: 1; transform: scale(1); }
.mpu-view-pulse { animation: mpu-pulse 1.8s infinite; }
@keyframes mpu-pulse { 0% { box-shadow: 0 0 0 0 rgba(30,144,255,0.35); } 70% { box-shadow: 0 0 0 14px rgba(30,144,255,0); } 100% { box-shadow: 0 0 0 0 rgba(30,144,255,0); } }

/* Carousel */
.mpu-carousel { position: relative; overflow: hidden; background: #000; border-radius: 8px; }
.mpu-carousel-frame { position: relative; width: 100%; height: 60vh; overflow: hidden; background: transparent; }

/* slides absolutely positioned and centered via flexbox */
.mpu-slide { position: absolute; top: 0; right: 0; bottom: 0; left: 0; display: flex; align-items: center; justify-content: center; padding: 0; box-sizing: border-box; opacity: 0; visibility: hidden; transition: opacity 220ms ease, visibility 220ms ease; }
.mpu-slide.mpu-active { opacity: 1; visibility: visible; }

.mpu-slide img, .mpu-slide video { display: block; margin: 0 auto; max-width: 100%; max-height: 100%; width: auto; height: auto; object-fit: contain; }

/* slide-level delete button */
.mpu-slide-delete { position: absolute; top: 10px; right: 10px; width: 34px; height: 34px; border-radius: 50%; background: rgba(0,0,0,0.45); color: #fff; border: none; font-size: 20px; line-height: 34px; text-align: center; cursor: pointer; display: none; z-index: 20; }
.mpu-slide-delete:hover { background: rgba(0,0,0,0.6); }

.mpu-delete-btn { padding: 8px 12px; background: #c62828; color: #fff; border: none; border-radius: 6px; cursor: pointer; font-weight: 700; margin-left: 8px; display: none; }
.mpu-delete-btn:hover { background: #a81f1f; }

/* completion modal z-index to sit above onboarding */
#mpu-complete-modal { z-index: 110000 !important; }

/* Fullscreen overlay */
#mpu-fullscreen-overlay { position: fixed; display: none; align-items: center; justify-content: center; top: 0; left: 0; width: 100vw; height: 100vh; background: var(--mpu-overlay); z-index: 9999; }
#mpu-fullscreen-content img, #mpu-fullscreen-content video { max-width: 100%; max-height: 100%; object-fit: contain; }

#mpu-onboarding { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: var(--mpu-overlay); display: flex; align-items: center; justify-content: center; z-index: 100000; opacity: 0; pointer-events: none; transition: opacity 0.25s ease; }
#mpu-onboarding.mpu-onboarding-visible { opacity: 1; pointer-events: auto; }

.mpu-onboarding-box { background: var(--mpu-card); padding: 22px; width: 92%; max-width: 380px; border-radius: 12px; text-align: center; box-shadow: 0 8px 30px rgba(0,0,0,0.3); color: var(--mpu-text); }
.mpu-onboarding-step { display: none; font-size: 16px; margin: 18px 0; color: var(--mpu-text); }
#mpu-onboarding-next { padding: 10px 18px; background: var(--mpu-accent); color: #fff; border: none; border-radius: 8px; cursor: pointer; font-weight: 700; }

@media (max-width: 767px) {
    .mpu-carousel-frame { height: 55vh; }
    #mpu-files { width: 220px; }
    .mpu-upload-arrow { right: -44px; top: 10px; }
}

.mpu-error { font-size: 13px; color: #c00; margin-top: 6px; }

.mpu-progress-inner.mpu-progress-indeterminate {
  background: linear-gradient(90deg, rgba(255,255,255,0.06), rgba(255,255,255,0.18), rgba(255,255,255,0.06));
  animation: mpu-progress-stripe 1s linear infinite;
  transition: none;
}

@keyframes mpu-progress-stripe {
  0% { background-position: 0 0; }
  100% { background-position: 40px 0; }
}