/* ─── Drum Isolation v3.0.0 — StemLabPro ─── */
/* Depends on stemlab-core.css for design tokens */
/* Purpose-built drum kit isolation interface   */


/* ═══════════════════════════════════════
   PAGE BACKGROUND
   Override header plugin's nuclear dark bg.
   Clean base canvas — no radial glow.
   ═══════════════════════════════════════ */

body:has(#drum-isolation-app),
html body:has(#drum-isolation-app) {
    background: var(--color-bg-base) !important;
    background-color: var(--color-bg-base) !important;
}

body:has(#drum-isolation-app) .elementor-element.e-con.e-parent,
body:has(#drum-isolation-app) .elementor-element.e-con {
    background-color: transparent !important;
    background-image: none !important;
}


/* ═══════════════════════════════════════
   APP WRAPPER
   ═══════════════════════════════════════ */

#drum-isolation-app {
    position: relative;
    z-index: 1;
    max-width: 640px;
    margin: 0 auto;
    padding: var(--space-12) var(--space-5) var(--space-20);
    font-family: var(--font-sans);
    color: var(--color-text-primary);
}

#drum-isolation-app *, #drum-isolation-app *::before, #drum-isolation-app *::after { box-sizing: border-box; }


/* ═══════════════════════════════════════
   HEADER — Overline brand title
   ═══════════════════════════════════════ */

.di-header {
    margin-bottom: var(--space-8);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
}

.di-header-titles {
    display: flex;
    align-items: baseline;
    gap: var(--space-3);
}

.di-header-label {
    font-size: var(--text-overline);
    font-weight: var(--weight-medium);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    color: var(--color-text-subdued);
}

.di-header-label--accent {
    color: var(--color-accent);
    font-weight: var(--weight-semibold);
}


/* ─── Ticket Meter (inline in header) ─── */

.di-meter {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-shrink: 0;
}

.di-meter-bar {
    width: 80px;
    height: 4px;
    border-radius: var(--radius-full);
    background: var(--color-bg-tint);
    overflow: hidden;
}

.di-meter-fill {
    height: 100%;
    border-radius: var(--radius-full);
    background: var(--color-accent);
    width: 100%;
    transition: width var(--duration-slow) var(--ease-standard);
}

.di-meter-label,
.di-splits-counter {
    font-family: var(--font-mono);
    font-size: var(--text-caption);
    font-weight: var(--weight-medium);
    color: var(--color-text-subdued);
    white-space: nowrap;
}
.di-splits-counter:empty ~ .di-meter-bar,
.di-splits-counter:empty { opacity: 0; }

/* ─── Paid balance indicator — lighter accent shade ─── */
.di-paid-indicator {
    font-family: var(--font-mono);
    font-size: var(--text-caption);
    font-weight: var(--weight-medium);
    color: var(--color-accent);
    opacity: 0.75;
    white-space: nowrap;
}

/* ─── Meter wrapper: stacks counter + paid badge ─── */
.di-meter-info {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

/* ─── Buy More Splits link ─── */
.di-buy-more-link {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    font-size: var(--text-caption);
    font-weight: var(--weight-medium);
    color: var(--color-text-disabled);
    text-decoration: none;
    white-space: nowrap;
    transition: color var(--duration-fast) var(--ease-standard);
    line-height: 1;
}

.di-buy-more-link:hover {
    color: var(--color-accent);
    text-decoration: none;
}

.di-buy-more-link::after {
    content: '→';
    font-size: 0.85em;
    opacity: 0.8;
}


/* ═══════════════════════════════════════
   MAIN CARD — Clean elevation, no glass
   ═══════════════════════════════════════ */

.di-card {
    background: var(--color-bg-surface);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    padding: var(--card-padding-xl);
    max-width: 640px !important;
    width: 100%;
    margin: 0 auto;
}

/* Sections */
.di-section { display: none; }
.di-section.di-active { display: block; }
.di-hidden { display: none !important; }
#di-supported-formats { display: none; }


/* ═══ A) UPLOAD AREA — Recessed darker zone ═══ */

.di-upload-zone {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    height: 160px;
    background: var(--color-bg-base);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    position: relative;
    transition: border-color var(--duration-normal) var(--ease-standard),
                background var(--duration-normal) var(--ease-standard);
}

.di-upload-zone:hover {
    border-color: var(--color-accent-border);
    background: var(--color-bg-base);
}

.di-upload-zone:hover .di-upload-icon svg {
    stroke: var(--color-accent);
    transform: translateY(-3px);
    filter: drop-shadow(0 4px 12px var(--color-accent-glow));
}

.di-upload-zone.di-dragover {
    border-color: var(--color-accent);
    background: var(--color-accent-tint);
}

.di-upload-zone.di-dragover .di-upload-icon svg {
    stroke: var(--color-accent);
    animation: di-float 1.5s ease-in-out infinite;
}

@keyframes di-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-6px); }
}

.di-upload-zone input[type="file"] {
    position: absolute; width: 1px; height: 1px; opacity: 0;
    overflow: hidden; clip: rect(0,0,0,0); pointer-events: none;
}

.di-upload-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.di-upload-icon svg {
    stroke: var(--color-text-disabled);
    transition: all var(--duration-normal) var(--ease-standard);
}

.di-upload-prompt {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.di-file-preview { display: flex; align-items: center; justify-content: space-between; width: 100%; padding: 0 var(--space-4); }
.di-file-preview.di-hidden { display: none; }
.di-file-info { display: flex; flex-direction: column; gap: var(--space-1); }
.di-file-name { font-weight: var(--weight-semibold); font-size: var(--text-body); color: var(--color-text-primary); word-break: break-all; }
.di-file-size { font-size: var(--text-body-sm); color: var(--color-text-subdued); }

.di-btn-ghost {
    background: none; border: none; color: var(--color-text-disabled);
    font-size: var(--text-h2); cursor: pointer; padding: var(--space-1) var(--space-2);
    transition: color var(--duration-fast) var(--ease-standard);
}
.di-btn-ghost:hover { color: var(--color-error); }


/* ═══ B) OPTIONS ROW ═══ */

.di-options-row {
    display: flex;
    align-items: stretch;
    gap: 0;
    margin-top: var(--space-6);
}

.di-option {
    flex: 1 1 0%;
    min-width: 0;
}

.di-option label {
    display: block;
    font-size: var(--text-overline);
    font-weight: var(--weight-semibold);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wider);
    color: var(--color-text-subdued);
    margin-bottom: var(--space-2);
}

.di-option-divider {
    width: 1px;
    background: var(--color-border);
    margin: 0 var(--space-4);
    align-self: stretch;
}


/* ─── Custom select styles (Separation + Input Type + Format) ─── */

.di-custom-select {
    position: relative;
    z-index: 1;
}

/* When a dropdown is open, lift it above sibling UI (button, checkbox, etc.) */
.di-custom-select:has(.di-open),
.di-custom-select.di-select-open {
    z-index: 10;
}

#drum-isolation-app .di-custom-select-trigger {
    width: 100% !important;
    padding: var(--space-3) var(--space-8) var(--space-3) var(--space-4) !important;
    background: var(--color-bg-surface) !important;
    border: 1px solid var(--color-border) !important;
    border-radius: var(--radius-sm) !important;
    color: var(--color-text-primary) !important;
    font-size: var(--text-body-sm) !important;
    font-family: var(--font-sans) !important;
    cursor: pointer;
    display: flex; align-items: center; justify-content: space-between;
    text-align: left; outline: none !important;
    box-shadow: none !important;
    transition: border-color var(--duration-fast) var(--ease-standard);
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    min-height: 44px;
}

#drum-isolation-app .di-custom-select-trigger:hover {
    border-color: var(--color-accent-border) !important;
}

.di-custom-select-trigger svg { color: var(--color-text-subdued); }

.di-custom-select-menu {
    display: none;
    position: absolute;
    top: calc(100% + var(--space-2));
    left: 0; right: 0;
    background: var(--color-bg-overlay);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius-md);
    overflow: hidden;
    z-index: 50;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}
.di-custom-select-menu.di-open { display: block; }

.di-custom-option {
    padding: var(--space-4);
    font-size: var(--text-body-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: background var(--duration-fast) var(--ease-standard),
                color var(--duration-fast) var(--ease-standard);
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}
.di-custom-option:hover { background: var(--color-bg-tint, rgba(255,255,255,0.08)); color: var(--color-text-primary, #fff); }
.di-custom-option--active { background: var(--color-accent-tint, rgba(240,23,111,0.12)); color: var(--color-text-primary, #fff); font-weight: 600; }
.di-format-plus { color: var(--color-accent); font-weight: var(--weight-semibold); }

/* Remove old native select — model is custom */
#drum-isolation-app .di-model-options select {
    display: none !important;
}


/* ═══ C) TERMS ═══ */

.di-terms-row {
    margin-top: var(--space-5);
}

.di-terms {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
}

.di-terms input[type="checkbox"] {
    accent-color: var(--color-accent);
    width: 15px; height: 15px;
    flex-shrink: 0;
}

.di-terms span {
    font-size: var(--text-body-sm);
    color: var(--color-text-subdued);
}

.di-terms a { color: var(--color-accent); text-decoration: none; }
.di-terms a:hover { text-decoration: underline; }


/* ═══ D) ISOLATE BUTTON ═══ */

#drum-isolation-app .di-btn-primary {
    display: flex !important;
    align-items: center;
    justify-content: center;
    width: 100% !important;
    max-width: 100% !important;
    min-height: 52px;
    height: auto !important;
    margin-top: var(--space-6);
    background: var(--color-accent) !important;
    color: var(--color-text-on-accent) !important;
    border: none !important;
    border-radius: var(--radius-md) !important;
    font-size: var(--text-overline) !important;
    font-weight: var(--weight-medium) !important;
    text-transform: uppercase !important;
    letter-spacing: var(--tracking-wider) !important;
    cursor: pointer;
    font-family: var(--font-sans);
    transition: background var(--duration-fast) var(--ease-standard),
                box-shadow var(--duration-fast) var(--ease-standard),
                transform var(--duration-fast) var(--ease-standard);
    padding: 0 var(--space-6) !important;
    position: relative;
    overflow: hidden;
}

#drum-isolation-app .di-btn-primary:hover:not(:disabled) {
    background: var(--color-accent-hover) !important;
    box-shadow: 0 0 20px var(--color-accent-glow);
    transform: translateY(-1px);
}

#drum-isolation-app .di-btn-primary:active:not(:disabled) {
    background: var(--color-accent-active) !important;
    box-shadow: none;
    transform: scale(0.98);
}

#drum-isolation-app .di-btn-primary:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

.di-btn-text {
    position: relative;
    z-index: 1;
}


/* ═══════════════════════════════════════
   SECONDARY BUTTON
   ═══════════════════════════════════════ */

.di-btn-secondary {
    background: transparent !important;
    color: var(--color-text-secondary) !important;
    border: 1px solid var(--color-border-strong) !important;
    border-radius: var(--radius-md) !important;
    padding: var(--space-3) var(--space-5);
    font-size: var(--text-body-sm);
    font-weight: var(--weight-medium);
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--duration-fast) var(--ease-standard);
}
.di-btn-secondary:hover {
    border-color: var(--color-accent-border) !important;
    color: var(--color-accent) !important;
    background: var(--color-bg-elevated) !important;
}


/* ═══════════════════════════════════════
   PROCESSING
   ═══════════════════════════════════════ */

.di-processing-animation { padding: var(--space-16) 0 var(--space-6); display: flex; justify-content: center; }

.di-waveform { display: flex; align-items: center; gap: 3px; height: 44px; }
.di-waveform span {
    display: block; width: 4px; height: 100%;
    background: var(--color-accent); border-radius: var(--radius-xs);
    animation: di-wave 1s ease-in-out infinite;
}
.di-waveform span:nth-child(1) { animation-delay: 0s; height: 55%; }
.di-waveform span:nth-child(2) { animation-delay: .1s; height: 75%; }
.di-waveform span:nth-child(3) { animation-delay: .2s; height: 100%; }
.di-waveform span:nth-child(4) { animation-delay: .3s; height: 65%; }
.di-waveform span:nth-child(5) { animation-delay: .4s; height: 85%; }
.di-waveform span:nth-child(6) { animation-delay: .5s; height: 45%; }
.di-waveform span:nth-child(7) { animation-delay: .6s; height: 80%; }
.di-waveform span:nth-child(8) { animation-delay: .7s; height: 55%; }
.di-waveform span:nth-child(9) { animation-delay: .8s; height: 90%; }
.di-waveform span:nth-child(10) { animation-delay: .9s; height: 70%; }
@keyframes di-wave { 0%, 100% { transform: scaleY(0.3); } 50% { transform: scaleY(1); } }
.di-waveform-small { height: 20px; }
.di-waveform-small span { width: 3px; }

.di-processing-status { text-align: center; font-size: var(--text-body); font-weight: var(--weight-semibold); color: var(--color-text-primary); margin: 0 0 var(--space-4); }
.di-progress-bar { height: 2px; background: var(--color-bg-tint); border-radius: var(--radius-full); overflow: hidden; }
.di-progress-fill { height: 100%; background: var(--color-accent); border-radius: var(--radius-full); width: 0%; transition: width var(--duration-slow) var(--ease-standard); }
.di-processing-note { text-align: center; font-size: var(--text-body-sm); color: var(--color-text-subdued); margin: var(--space-4) 0 0; }


/* ═══════════════════════════════════════
   RESULTS
   ═══════════════════════════════════════ */

.di-results-title { font-size: var(--text-h4); font-weight: var(--weight-bold); color: var(--color-accent); margin: 0 0 var(--space-5); }

/* .di-results-actions base — overridden in full by SECTION 2 block below */
.di-results-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-top: 24px;
}
.di-zip-status { display: flex; align-items: center; justify-content: center; gap: var(--space-3); padding: var(--space-4) 0; font-size: var(--text-body-sm); color: var(--color-text-subdued); }

.di-stem-check { accent-color: var(--color-accent); }

.di-error-icon { text-align: center; font-size: var(--text-display); color: var(--color-error); margin: var(--space-10) 0 var(--space-4); }
.di-error-title { text-align: center; font-size: var(--text-h4); font-weight: var(--weight-bold); color: var(--color-text-primary); margin: 0 0 var(--space-2); }
.di-error-message { text-align: center; font-size: var(--text-body-sm); color: var(--color-text-subdued); margin: 0 0 var(--space-6); }
.di-error-section { /* container for error display */ }


/* ═══════════════════════════════════════
   MODALS
   ═══════════════════════════════════════ */

/* ── Paywall & Usage Modals — Luxury Dark Theme ── */
.di-paywall-overlay, .di-usage-overlay {
    position: fixed; inset: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
    display: flex; align-items: center; justify-content: center;
    z-index: 200000; padding: 20px;
}

.di-paywall-card, .di-usage-modal {
    background: #1A1A22;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 48px 40px;
    max-width: 420px; width: 100%;
    text-align: center;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
    animation: di-modal-in 0.3s ease-out;
}
@keyframes di-modal-in { from { opacity: 0; transform: scale(0.95) translateY(8px); } to { opacity: 1; transform: scale(1) translateY(0); } }

/* Title */
.di-paywall-title, .di-usage-modal h3,
.di-usage-modal .di-prompt-title {
    font-size: 1.375rem !important; font-weight: 700 !important;
    color: #F5F5F7 !important; margin: 0 0 12px !important;
    letter-spacing: -0.02em; line-height: 1.3;
}

/* Description */
.di-paywall-desc, .di-usage-modal p,
.di-usage-modal .di-prompt-text {
    color: #888896 !important; font-size: 0.9375rem !important;
    line-height: 1.6 !important; margin: 0 0 32px !important; font-weight: 300 !important;
}

/* Actions container */
.di-paywall-actions,
.di-usage-modal .di-prompt-actions {
    display: flex; flex-direction: column; gap: 12px;
}

/* Buttons — luxury pill style */
.di-paywall-btn,
.di-usage-modal .di-prompt-btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 14px 24px; border-radius: 50px;
    font-weight: 600; font-size: 0.9375rem;
    text-decoration: none; cursor: pointer; border: none;
    transition: all 0.2s ease; width: 100%; box-sizing: border-box; line-height: 1;
}

.di-paywall-btn--primary,
.di-usage-modal .di-prompt-btn--primary {
    background: #FF2E86; color: #fff;
    box-shadow: 0 4px 24px rgba(255, 46, 134, 0.2);
}
.di-paywall-btn--primary:hover,
.di-usage-modal .di-prompt-btn--primary:hover {
    background: #E0276F; box-shadow: 0 6px 32px rgba(255, 46, 134, 0.3);
    transform: translateY(-1px); color: #fff; text-decoration: none;
}

.di-paywall-btn--ghost,
.di-usage-modal .di-prompt-btn--ghost {
    background: transparent; color: #E0E0E4;
    border: 1.5px solid rgba(255, 255, 255, 0.15);
}
.di-paywall-btn--ghost:hover,
.di-usage-modal .di-prompt-btn--ghost:hover {
    border-color: rgba(255, 255, 255, 0.35); color: #fff; text-decoration: none;
}

/* Maybe Later / close button */
.di-usage-modal .di-btn-secondary,
.di-usage-modal .di-usage-close {
    background: transparent !important; color: rgba(255, 255, 255, 0.4) !important;
    border: 1px solid rgba(255, 255, 255, 0.08) !important; border-radius: 50px !important;
    padding: 12px 24px !important; font-size: 0.875rem !important; font-weight: 500 !important;
    cursor: pointer; width: 100%; margin-top: 4px; transition: all 0.2s ease;
}
.di-usage-modal .di-btn-secondary:hover,
.di-usage-modal .di-usage-close:hover {
    color: rgba(255, 255, 255, 0.7) !important; border-color: rgba(255, 255, 255, 0.15) !important;
}

/* Hide old divider */
.di-usage-divider { display: none !important; }

/* Override old inline-styled buttons */
.di-usage-modal .di-btn-primary {
    background: #FF2E86 !important; color: #fff !important;
    border-radius: 50px !important; padding: 14px 24px !important;
    font-weight: 600 !important; font-size: 0.9375rem !important;
    box-shadow: 0 4px 24px rgba(255, 46, 134, 0.2) !important;
    border: none !important; text-decoration: none !important;
    width: 100% !important; box-sizing: border-box !important; margin-bottom: 8px !important;
    display: block !important; text-align: center !important;
}
.di-usage-modal .di-btn-primary:hover {
    background: #E0276F !important;
}
.di-usage-modal .di-usage-close { margin-top: var(--space-4); width: 100%; padding: var(--space-4); font-size: var(--text-body-sm); height: auto !important; text-transform: none !important; letter-spacing: var(--tracking-normal) !important; }


/* ═══════════════════════════════════════
   FADE-IN ANIMATION
   ═══════════════════════════════════════ */

#drum-isolation-app .di-header,
#drum-isolation-app .di-card {
    animation: di-fade-up var(--duration-medium) var(--ease-decelerate) both;
}

#drum-isolation-app .di-card {
    animation-delay: 0.1s;
}

@keyframes di-fade-up {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}


/* ═══════════════════════════════════════
   GOLDEN TICKET CELEBRATION
   ═══════════════════════════════════════ */

.di-golden-ticket {
    position: fixed;
    right: 24px;
    top: 50%;
    transform: translateY(-50%) translateX(160px);
    z-index: 99998;
    opacity: 0;
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1),
                opacity 0.35s ease;
}
.di-gt-inner {
    display: flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(145deg, rgba(28, 26, 46, 0.95) 0%, rgba(42, 38, 64, 0.95) 100%);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1.5px solid rgba(255, 215, 0, 0.25);
    border-radius: 14px;
    padding: 14px 20px;
    position: relative;
    overflow: hidden;
    box-shadow:
        0 0 0 1px rgba(255, 215, 0, 0.06),
        0 0 30px rgba(255, 215, 0, 0.1),
        0 0 60px rgba(255, 215, 0, 0.05),
        0 8px 24px rgba(0, 0, 0, 0.4);
}
/* Shine sweep across the inner card */
.di-gt-inner::before {
    content: '';
    position: absolute;
    top: -80%;
    left: -80%;
    width: 50%;
    height: 260%;
    background: linear-gradient(
        110deg,
        transparent 0%,
        transparent 35%,
        rgba(255, 215, 0, 0.08) 42%,
        rgba(255, 255, 255, 0.15) 50%,
        rgba(255, 215, 0, 0.08) 58%,
        transparent 65%,
        transparent 100%
    );
    animation: di-gt-shine 2.5s ease-in-out 0.4s infinite;
    pointer-events: none;
}
/* Subtle gold edge glow */
.di-gt-inner::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15), transparent 40%, transparent 60%, rgba(255, 215, 0, 0.1));
    pointer-events: none;
    z-index: 0;
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask-composite: exclude;
    -webkit-mask-composite: xor;
    padding: 1.5px;
}
@keyframes di-gt-shine {
    0% { left: -80%; }
    100% { left: 180%; }
}
.di-golden-ticket.di-gt-show {
    transform: translateY(-50%) translateX(0);
    opacity: 1;
}
.di-golden-ticket.di-gt-hide {
    transform: translateY(-50%) translateX(160px);
    opacity: 0;
    transition: transform 0.4s ease-in, opacity 0.3s ease;
}
.di-gt-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    filter: drop-shadow(0 0 6px rgba(255, 215, 0, 0.4));
    animation: di-gt-bounce 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) 0.3s both;
}
.di-gt-label {
    font-size: 13px;
    font-weight: 600;
    color: rgba(255, 215, 0, 0.7);
    letter-spacing: 0.04em;
    font-family: var(--font-sans, 'Satoshi', 'Inter', system-ui, sans-serif);
    position: relative;
    z-index: 1;
}
.di-gt-text {
    font-size: 22px;
    font-weight: 800;
    color: #FFD700;
    letter-spacing: -0.02em;
    font-family: var(--font-sans, 'Satoshi', 'Inter', system-ui, sans-serif);
    text-shadow: 0 0 12px rgba(255, 215, 0, 0.4);
    position: relative;
    z-index: 1;
    animation: di-gt-count 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) 0.5s both;
}
@keyframes di-gt-bounce {
    0% { transform: scale(0.3) rotate(-10deg); }
    50% { transform: scale(1.15) rotate(3deg); }
    100% { transform: scale(1) rotate(0deg); }
}
@keyframes di-gt-count {
    0% { transform: scale(0.5); opacity: 0; }
    60% { transform: scale(1.3); }
    100% { transform: scale(1); opacity: 1; }
}


/* ═══ Share Button ═══ */
.di-btn-share {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.06) 0%, rgba(255, 255, 255, 0.03) 100%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    font-weight: 600;
    font-family: var(--font-sans, 'Satoshi', 'Inter', system-ui, sans-serif);
    cursor: pointer;
    transition: all 0.2s ease;
    -webkit-appearance: none;
    position: relative;
    overflow: hidden;
}
.di-btn-share::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -60%;
    width: 40%;
    height: 200%;
    background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.08) 50%, transparent 60%);
    animation: di-share-shine 3s ease-in-out infinite;
    pointer-events: none;
}
@keyframes di-share-shine {
    0% { left: -60%; }
    100% { left: 160%; }
}
.di-btn-share:hover {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
    border-color: rgba(255, 255, 255, 0.2);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}
.di-btn-share:active {
    transform: scale(0.97);
}
.di-btn-share:disabled {
    opacity: 0.5;
    cursor: wait;
}
.di-btn-share--copied {
    background: rgba(34, 197, 94, 0.08) !important;
    border-color: rgba(34, 197, 94, 0.25) !important;
    color: #22C55E !important;
}
.di-btn-share--copied::before {
    animation: none;
}


/* ═══════════════════════════════════════════════════════════════
   SECTION 2: SAMPLE LIBRARY RESULTS
   Splice/Output-inspired flat stem rows — clean, modern, minimal
   ═══════════════════════════════════════════════════════════════ */

/* ─── Results Title — "Your Stems" heading ─── */
.di-results-title {
    font-size: 13px !important;
    font-weight: 700 !important;
    text-transform: uppercase !important;
    letter-spacing: 0.16em !important;
    color: rgba(255, 255, 255, 0.85) !important;
    margin: 0 0 4px !important;
    line-height: 1 !important;
}

/* ─── Results Subtitle — track name, subdued ─── */
.di-results-subtitle {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.35);
    margin: 0 0 20px;
    font-weight: 400;
    letter-spacing: 0.02em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ─── Stem Rows Container ─── */
.di-channel-strips {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin: 0 0 4px;
}

/* ─── Individual Stem Row — flat line separated ─── */
.di-strip {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 4px;
    background: transparent;
    border: none;
    border-radius: 0;
    min-width: 0;
    position: relative;
}

.di-strip::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 15%;
    right: 15%;
    height: 1px;
    background: linear-gradient(
        to right,
        transparent 0%,
        rgba(255, 255, 255, 0.09) 30%,
        rgba(255, 255, 255, 0.09) 70%,
        transparent 100%
    );
    pointer-events: none;
}

.di-strip:last-child::after {
    display: none;
}

.di-strip:hover {
    background: transparent;
    transform: none;
}

.di-strip--playing {
    background: transparent;
}

/* ─── Color Dot — REMOVED from stem rows ─── */
.di-stem-dot {
    display: none !important;
}

/* ─── Stem Label — uppercase, bold, fixed width ─── */
.di-strip-label {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.13em;
    color: rgba(255, 255, 255, 0.7);
    flex-shrink: 0;
    width: 64px;
    min-width: 64px;
    max-width: 64px;
    line-height: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.di-strip:hover .di-strip-label {
    color: rgba(255, 255, 255, 0.7);
}

.di-strip--playing .di-strip-label {
    color: rgba(255, 255, 255, 0.7);
}

/* ─── Hits area — grows to fill available width ─── */
.di-strip-hits {
    flex: 1;
    min-width: 0;
    min-height: 24px;
    display: flex;
    align-items: center;
}

/* ─── Download Icon — pinned to far right ─── */
.di-strip-download {
    color: rgba(255, 255, 255, 0.22) !important;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 4px;
    border-radius: 5px;
    transition: color 0.18s ease, background 0.18s ease;
    text-decoration: none;
    line-height: 0;
    margin-left: auto;
}

.di-strip-download:hover {
    color: #F01770 !important;
    background: rgba(240, 23, 112, 0.08);
    text-decoration: none;
}

/* Keep legacy class intact — hidden but present */
.di-strip-accent { display: none; }
.di-strip-main   { display: contents; }
.di-strip-header { display: contents; }
.di-strip-controls { display: contents; }
.di-strip-play   {
    display: none; /* full-stem play not shown in flat design */
}


/* ─── Results Actions — stacked full-width buttons ─── */
.di-results-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 20px;
}

/* Download Selected — full-width pink accent */
.di-results-actions .di-btn-primary {
    width: 100% !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;
    padding: 13px 24px !important;
    height: auto !important;
    font-size: 11px !important;
    font-weight: 700 !important;
    letter-spacing: 0.12em !important;
    text-transform: uppercase !important;
    border-radius: 9px !important;
    background: #F01770 !important;
    color: #fff !important;
    border: none !important;
    box-shadow: 0 2px 18px rgba(240,23,112,0.28) !important;
    transition: background 0.18s ease, box-shadow 0.18s ease, transform 0.15s ease !important;
    margin-top: 0 !important;
}
.di-results-actions .di-btn-primary:hover:not(:disabled) {
    background: #D4155F !important;
    box-shadow: 0 4px 28px rgba(240,23,112,0.4) !important;
    transform: translateY(-1px) !important;
}
.di-results-actions .di-btn-primary:active:not(:disabled) {
    transform: scale(0.98) !important;
    box-shadow: none !important;
}
.di-results-actions .di-btn-primary:disabled {
    opacity: 0.28 !important;
    cursor: not-allowed !important;
    box-shadow: none !important;
    transform: none !important;
}

/* New Track — full-width ghost/outline */
.di-results-actions .di-btn-secondary {
    width: 100% !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 11px 24px !important;
    height: auto !important;
    font-size: 11px !important;
    font-weight: 500 !important;
    letter-spacing: 0.1em !important;
    text-transform: uppercase !important;
    border-radius: 9px !important;
    background: transparent !important;
    color: rgba(255, 255, 255, 0.38) !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    transition: border-color 0.18s ease, color 0.18s ease !important;
    min-width: auto;
}
.di-results-actions .di-btn-secondary:hover {
    border-color: rgba(255, 255, 255, 0.25) !important;
    color: rgba(255, 255, 255, 0.72) !important;
    background: transparent !important;
}


/* ═══════════════════════════════════════════════════════════════
   SECTION 3: HIT BROWSER
   Individual hit cells — inline within each stem row
   ═══════════════════════════════════════════════════════════════ */

/* Loading state */
.di-hits-loading {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: rgba(255, 255, 255, 0.28);
    font-size: 10px;
    letter-spacing: 0.03em;
}

.di-hits-spinner {
    width: 10px;
    height: 10px;
    border: 1.5px solid rgba(255, 255, 255, 0.07);
    border-top-color: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    flex-shrink: 0;
    animation: di-spin 0.8s linear infinite;
}

@keyframes di-spin {
    to { transform: rotate(360deg); }
}

/* Hit count label — sits above the carousel */
.di-hits-count {
    display: none; /* hidden in flat row — count shown via tooltip on hover */
}

/* ─── Carousel: left-arrow │ viewport │ right-arrow ─── */
.di-hits-carousel {
    display: flex;
    align-items: center;
    gap: 0;
    width: 100%;
}

/* Arrow buttons — minimal, fade when at boundary */
.di-hits-arrow {
    flex-shrink: 0;
    width: 16px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: transparent !important;
    border: none !important;
    color: rgba(255, 255, 255, 0.2) !important;
    cursor: pointer;
    transition: color 0.18s ease;
    padding: 0;
    line-height: 0;
    align-self: center;
}

.di-hits-arrow:hover {
    color: #F01770 !important;
}

/* Scrolling viewport */
.di-hits-viewport {
    flex: 1;
    overflow: hidden;
    min-width: 0;
    touch-action: pan-y;
    -webkit-overflow-scrolling: touch;
}

/* Row of hit cells */
.di-hits-row {
    display: flex;
    align-items: stretch;
    gap: 0;
    width: max-content;
    transition: transform 0.28s cubic-bezier(0.25, 0.1, 0.25, 1);
}

/* ─── Hit Cell — inline group: [checkbox][number][▶] | separator ─── */
.di-hit-cell {
    display: inline-flex;
    align-items: center;
    gap: 3px;
    padding: 3px 6px;
    background: transparent;
    border: none;
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 0;
    box-sizing: border-box;
    cursor: pointer;
    flex: 0 0 auto;
    line-height: 0;
    transition: background 0.12s ease;
}

.di-hit-cell:last-child {
    border-right: none;
}

.di-hit-cell:hover {
    background: rgba(255, 255, 255, 0.06);
}

.di-hit-cell--selected {
    background: rgba(139, 92, 246, 0.1);
}

.di-hit-cell--playing {
    background: rgba(240, 23, 112, 0.08);
}

/* ─── Checkbox — 12×12, custom styled, purple when checked ─── */
.di-hit-check {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    border: 1.5px solid rgba(255, 255, 255, 0.16);
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.03);
    cursor: pointer;
    flex: 0 0 12px;
    position: relative;
    transition: all 0.12s ease;
    margin: 0;
    padding: 0;
}

.di-hit-check:hover {
    border-color: rgba(139, 92, 246, 0.55);
}

.di-hit-check:checked {
    background: rgba(139, 92, 246, 0.9);
    border-color: rgba(139, 92, 246, 0.9);
}

.di-hit-check:checked::after {
    content: '';
    position: absolute;
    top: 1px;
    left: 3px;
    width: 3.5px;
    height: 6px;
    border: solid #fff;
    border-width: 0 1.5px 1.5px 0;
    transform: rotate(45deg);
}

/* ─── Hit Number — 10px mono, very subdued ─── */
.di-hit-num {
    font-family: var(--font-mono, 'JetBrains Mono', 'Fira Mono', monospace);
    font-size: 10px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.3);
    min-width: 14px;
    text-align: center;
    font-variant-numeric: tabular-nums;
    line-height: 0;
    height: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.di-hit-cell--playing .di-hit-num {
    color: rgba(255, 255, 255, 0.6);
}

/* ─── Play button — hidden ─── */
.di-hit-play {
    display: none !important;
}

/* ─── Empty / Error states ─── */
.di-hits-error,
.di-hits-none {
    font-size: 10px;
    color: rgba(255, 255, 255, 0.2);
    font-style: italic;
    padding: 2px 0;
    letter-spacing: 0.02em;
}


/* ═══════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════ */

@media (max-width: 640px) {
    #drum-isolation-app { padding: var(--space-6) var(--space-4) var(--space-16); }
    .di-card { padding: var(--card-padding); border-radius: var(--radius-lg); }

    .di-header { margin-bottom: var(--space-6); }

    .di-upload-zone { height: 120px; }

    .di-options-row { flex-direction: column; gap: var(--space-4); }
    .di-option-divider { display: none; }

    /* Ensure dropdown menus render on top of sibling UI on mobile */
    .di-custom-select:has(.di-open),
    .di-custom-select.di-select-open { z-index: 10; }
    .di-custom-select-menu {
        z-index: 50;
    }

    /* Bigger touch targets on mobile */
    #drum-isolation-app .di-custom-select-trigger {
        min-height: 48px;
        padding: var(--space-4) var(--space-8) var(--space-4) var(--space-4) !important;
        font-size: var(--text-body) !important;
    }
    .di-custom-option {
        padding: var(--space-4);
        font-size: var(--text-body);
    }

    /* Button adjusts for mobile */
    #drum-isolation-app .di-btn-primary {
        min-height: 48px;
        font-size: var(--text-overline) !important;
        letter-spacing: var(--tracking-wider) !important;
    }

    .di-results-actions { flex-direction: column; }
    .di-results-actions .di-btn-primary,
    .di-results-actions .di-btn-secondary { width: 100%; }

    .di-header {
        flex-direction: column;
        align-items: center;
        gap: var(--space-3);
    }

    .di-meter-bar {
        width: 60px;
    }

    .di-paywall-card, .di-usage-modal {
        padding: var(--space-8) var(--space-5);
    }

    /* ─── Stem row responsive ─── */
    .di-strip {
        padding: 9px 2px;
        gap: 8px;
    }

    .di-strip-label {
        width: 56px;
        min-width: 56px;
        max-width: 56px;
    }

    /* ─── Golden ticket mobile ─── */
    .di-golden-ticket {
        right: 16px;
        top: auto;
        bottom: 90px;
        transform: translateY(0) translateX(160px);
    }
    .di-golden-ticket.di-gt-show {
        transform: translateY(0) translateX(0);
    }
    .di-golden-ticket.di-gt-hide {
        transform: translateY(0) translateX(160px);
    }
}

@media (max-width: 480px) {
    /* Further tighten stem rows */
    .di-strip {
        padding: 8px 0;
        gap: 6px;
    }

    .di-strip-label {
        width: 50px;
        min-width: 50px;
        max-width: 50px;
        font-size: 9px;
    }

    .di-stem-dot {
        display: none !important;
    }

    /* Hit cells slightly tighter */
    .di-hit-cell {
        padding: 3px 5px;
        gap: 3px;
    }

    .di-hit-num {
        font-size: 9px;
        min-width: 14px;
    }
}