:root {
    --bg: #050713;
    --bg-elevated: rgba(15, 18, 40, 0.95);
    --bg-elevated-soft: rgba(17, 24, 39, 0.9);
    --accent: #38bdf8;
    --accent-soft: rgba(56, 189, 248, 0.2);
    --accent-strong: #0ea5e9;
    --danger: #f97373;
    --text: #e5e7eb;
    --text-soft: #9ca3af;
    --border-subtle: rgba(148, 163, 184, 0.3);
    --card-radius: 18px;
    --shadow-soft: 0 18px 50px rgba(15, 23, 42, 0.8);
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: radial-gradient(circle at top, #0f172a 0, #020617 50%, #000 100%);
    color: var(--text);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
    min-height: 100vh;
}

body {
    display: flex;
    align-items: stretch;
    justify-content: center;
}

.page-wrap {
    flex: 1;
    display: flex;
    justify-content: center;
    padding: 24px 16px 32px;
}

.shell {
    width: 100%;
    max-width: 1120px;
    background: radial-gradient(circle at top left, rgba(79, 70, 229, 0.18), transparent 55%),
                radial-gradient(circle at top right, rgba(14, 165, 233, 0.18), transparent 55%),
                linear-gradient(135deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.96));
    border-radius: 24px;
    padding: 22px 18px 20px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(148, 163, 184, 0.35);
    backdrop-filter: blur(22px);
    position: relative;
    overflow: hidden;
}

.shell::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(circle at 10% 0%, rgba(59, 130, 246, 0.2), transparent 60%),
        radial-gradient(circle at 90% 0%, rgba(236, 72, 153, 0.25), transparent 55%);
    mix-blend-mode: screen;
    opacity: 0.4;
}

.shell-inner {
    position: relative;
    z-index: 1;
}

header.app-header {
    display: flex;
    gap: 16px;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 18px;
    flex-wrap: wrap;
}

.title-block {
    display: flex;
    align-items: center;
    gap: 12px;
}

.title-icon {
    width: 38px;
    height: 38px;
    border-radius: 14px;
    background: radial-gradient(circle at 30% 0, #38bdf8, transparent 55%),
                radial-gradient(circle at 70% 100%, #6366f1, transparent 55%);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.7);
}

.title-icon span {
    font-size: 20px;
}

.title-text h1 {
    font-size: 20px;
    letter-spacing: 0.02em;
    margin: 0;
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.title-text h1 span.sub {
    font-size: 13px;
    font-weight: 400;
    color: var(--text-soft);
}

.title-text p {
    margin: 4px 0 0;
    font-size: 13px;
    color: var(--text-soft);
}

.license-chip {
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.6);
    background: radial-gradient(circle at top, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.85));
    font-size: 12px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
}

.license-chip .license-label,
.lang-select-wrap .lang-label {
    white-space: nowrap;
}

.license-chip .license-label::after,
.lang-select-wrap .lang-label::after {
    content: ":";
    margin-left: 4px;
}


.badge-dot {
    width: 9px;
    height: 9px;
    border-radius: 999px;
    background: linear-gradient(135deg, #22c55e, #a3e635);
    box-shadow: 0 0 0 1px rgba(21, 128, 61, 0.7), 0 0 12px rgba(34, 197, 94, 0.7);
}

.lang-select-wrap {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-soft);
}

.lang-select-wrap select {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.8);
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.96), rgba(15, 23, 42, 0.98));
    color: #e5e7eb;
    font-size: 12px;
    padding: 4px 28px 4px 10px;
    cursor: pointer;
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.7);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%23e5e7eb' d='M1 1l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 10px 6px;
}

.lang-select-wrap .lang-label {
    white-space: nowrap;
}

.lang-select-wrap select:focus {
    outline: none;
    border-color: rgba(56, 189, 248, 0.95);
    box-shadow:
        0 0 0 1px rgba(56, 189, 248, 0.9),
        0 0 0 4px rgba(56, 189, 248, 0.35);
}

.lang-select-wrap select option {
    background-color: #020617;
    color: #e5e7eb;
}

.lang-select-wrap select option:checked,
.lang-select-wrap select option:focus {
    background-color: #0ea5e9;
    color: #020617;
}

main {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1.05fr);
    gap: 16px;
}

@media (max-width: 900px) {
    main {
        grid-template-columns: minmax(0, 1fr);
    }

    header.app-header {
        align-items: flex-start;
    }
}

.card {
    background: linear-gradient(145deg, var(--bg-elevated), var(--bg-elevated-soft));
    border-radius: var(--card-radius);
    border: 1px solid rgba(148, 163, 184, 0.3);
    box-shadow: 0 12px 35px rgba(15, 23, 42, 0.75);
    padding: 16px 14px 13px;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.18), transparent 60%);
    opacity: 0.4;
    pointer-events: none;
}

.card-inner {
    position: relative;
    z-index: 1;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 10px;
}

.card-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-soft);
}

.card-title span.icon {
    width: 18px;
    height: 18px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at 30% 0, #38bdf8, transparent 60%),
                radial-gradient(circle at 70% 100%, #6366f1, transparent 60%);
    font-size: 11px;
}

.card-subtitle {
    font-size: 11px;
    color: var(--text-soft);
}

.info-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 10px;
}

.pill {
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.45);
    font-size: 11px;
    padding: 3px 8px;
    color: var(--text-soft);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: radial-gradient(circle at 50% 0, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.95));
}

.pill strong {
    color: var(--text);
    font-weight: 500;
}

.pill-dot {
    width: 6px;
    height: 6px;
    border-radius: 999px;
    background: var(--accent);
}

.file-input-wrap {
    position: relative;
    margin-bottom: 12px;
}

.file-input-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 11px;
    border-radius: 999px;
    background: radial-gradient(circle at 30% 0, rgba(56, 189, 248, 0.15), transparent 70%),
                linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.98));
    border: 1px solid rgba(56, 189, 248, 0.7);
    cursor: pointer;
    font-size: 13px;
    user-select: none;
}

.file-input-label span.icon {
    width: 18px;
    height: 18px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(15, 23, 42, 0.95);
    font-size: 11px;
}

.file-input-label .hint {
    font-size: 11px;
    color: var(--text-soft);
}

input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.file-meta {
    font-size: 12px;
    color: var(--text-soft);
    margin-bottom: 6px;
}

.file-meta span.value {
    color: var(--text);
}

.file-meta .dot {
    margin: 0 6px;
    color: rgba(148, 163, 184, 0.7);
}

.error-banner {
    display: none;
    margin-bottom: 8px;
    padding: 6px 9px;
    border-radius: 10px;
    font-size: 12px;
    background: linear-gradient(135deg, rgba(248, 113, 113, 0.16), rgba(127, 29, 29, 0.3));
    border: 1px solid rgba(248, 113, 113, 0.6);
    color: #fecaca;
}

.error-banner span.icon {
    margin-right: 6px;
}

.player-row {
    display: grid;
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    gap: 10px;
    margin-bottom: 10px;
}

@media (max-width: 720px) {
    .player-row {
        grid-template-columns: minmax(0, 1fr);
    }
}

.waveform-wrap {
    background: radial-gradient(circle at 50% 0, rgba(30, 64, 175, 0.24), rgba(15, 23, 42, 0.98));
    border-radius: 14px;
    border: 1px solid rgba(148, 163, 184, 0.5);
    padding: 6px 6px 8px;
}

#waveform {
    width: 100%;
    height: 140px;
    border-radius: 10px;
    background: linear-gradient(to bottom, #020617, #020617);
    display: block;
}

.timeline-row {
    margin-top: 6px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.slider-row {
    display: flex;
    gap: 8px;
    align-items: center;
}

.slider-row span.label {
    font-size: 11px;
    color: var(--text-soft);
    white-space: nowrap;
}

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 5px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(56, 189, 248, 0.6), rgba(94, 234, 212, 0.2));
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 999px;
    background: #e5e7eb;
    border: 2px solid #0ea5e9;
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.3);
    cursor: pointer;
    margin-top: -4.5px;
}

input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 999px;
    background: #e5e7eb;
    border: 2px solid #0ea5e9;
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.3);
    cursor: pointer;
}

.time-readout-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    font-size: 11px;
    color: var(--text-soft);
}

.time-chip {
    padding: 2px 7px;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.5);
    background: rgba(15, 23, 42, 0.9);
}

.time-chip strong {
    color: var(--accent);
    font-weight: 500;
    margin-left: 4px;
}

.controls-col {
    background: radial-gradient(circle at 0 0, rgba(56, 189, 248, 0.16), transparent 60%);
    border-radius: 12px;
    border: 1px solid rgba(148, 163, 184, 0.45);
    padding: 7px 8px 6px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.control-group-label {
    font-size: 11px;
    color: var(--text-soft);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.btn {
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.7);
    background: radial-gradient(circle at 30% 0, rgba(56, 189, 248, 0.18), transparent 65%),
                linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(15, 23, 42, 0.98));
    color: var(--text);
    padding: 6px 11px;
    font-size: 12px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    line-height: 1.1;
    white-space: nowrap;
}

.btn span.icon {
    font-size: 13px;
}

.btn-secondary {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.98));
}

.btn:disabled {
    opacity: 0.45;
    cursor: default;
}

.btn-main {
    border-color: rgba(56, 189, 248, 0.9);
    box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.45),
                0 10px 30px rgba(8, 47, 73, 0.9);
}

.btn-toggle-active {
    border-color: rgba(56, 189, 248, 0.9);
    color: #f8fafc;
    background: linear-gradient(135deg, rgba(8, 47, 73, 0.9), rgba(15, 23, 42, 0.98));
    box-shadow: 0 6px 18px rgba(8, 47, 73, 0.8);
}

.btn-danger {
    border-color: rgba(248, 113, 113, 0.85);
    background: linear-gradient(135deg, rgba(127, 29, 29, 0.9), rgba(127, 29, 29, 0.95));
}

#timeCurrent {
    font-size: 12px;
    color: var(--text-soft);
}

#timeCurrent strong {
    color: var(--text);
    font-weight: 500;
}

.section-title {
    font-size: 13px;
    color: var(--text-soft);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 6px;
}

.grid-two {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 8px;
}

@media (max-width: 720px) {
    .grid-two {
        grid-template-columns: minmax(0, 1fr);
    }
}

.option-block {
    background: radial-gradient(circle at 0 0, rgba(30, 64, 175, 0.25), transparent 60%);
    border-radius: 12px;
    border: 1px solid rgba(148, 163, 184, 0.5);
    padding: 8px 9px 7px;
    font-size: 12px;
}

.option-block h3 {
    font-size: 12px;
    margin: 0 0 6px;
    color: var(--text-soft);
}

.field-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 5px;
}

.field-row:last-child {
    margin-bottom: 0;
}

.field-row label {
    font-size: 12px;
    color: var(--text-soft);
}

.field-row small {
    font-size: 11px;
    color: var(--text-soft);
}

select, .select-mimic {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.8);
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.96), rgba(15, 23, 42, 0.98));
    color: #e5e7eb;
    font-size: 12px;
    padding: 4px 28px 4px 12px;
    min-width: 130px;
    cursor: pointer;
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.7);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%23e5e7eb' d='M1 1l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 10px 6px;
}

select:focus {
    outline: none;
    border-color: rgba(56, 189, 248, 0.95);
    box-shadow:
        0 0 0 1px rgba(56, 189, 248, 0.9),
        0 0 0 4px rgba(56, 189, 248, 0.35);
}

select option {
    background-color: #020617;
    color: #e5e7eb;
}

select option:checked,
select option:focus {
    background-color: #0ea5e9;
    color: #020617;
}

select:disabled {
    opacity: 0.45;
}

.checkbox-inline {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.checkbox-inline input[type="checkbox"] {
    width: 14px;
    height: 14px;
    border-radius: 4px;
    border: 1px solid rgba(148, 163, 184, 0.8);
    background: #020617;
    accent-color: var(--accent);
}

.export-card {
    margin-top: 8px;
}

.export-card .button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

@media (max-width: 600px) {
    .export-card .button-row {
        flex-direction: column;
    }

    .export-card .button-row .btn {
        width: 100%;
        justify-content: center;
    }
}

@media (min-width: 601px) {
    .export-card .button-row .btn-main {
        margin-left: auto;
    }
}

.export-info {
    margin-top: 6px;
    font-size: 11px;
    color: var(--text-soft);
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.export-info span.tag {
    padding: 2px 7px;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.6);
    background: rgba(15, 23, 42, 0.9);
}

footer.app-footer {
    margin-top: 14px;
    font-size: 11px;
    color: rgba(148, 163, 184, 0.88);
    display: flex;
    justify-content: space-between;
    gap: 8px;
    flex-wrap: wrap;
}

footer.app-footer span.em {
    color: var(--accent);
}

footer.app-footer .right {
    text-align: right;
}

@media (max-width: 640px) {
    footer.app-footer {
        flex-direction: column;
    }

    footer.app-footer .right {
        text-align: left;
    }
}

.paypal-panel {
    margin-top: 10px;
    padding: 16px;
    border-radius: 18px;
    border: 1px solid rgba(15, 23, 42, 0.2);
    background: #f8fafc;
    color: #111827;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.paypal-panel p {
    margin: 0 0 10px;
    font-size: 13px;
    line-height: 1.45;
}

.paypal-card-text {
    color: #0f172a;
}

.paypal-card-text strong {
    color: #0b1120;
}

.paypal-button-shell {
    padding: 12px;
    border-radius: 14px;
    background: #ffffff;
    border: 1px solid #e2e8f0;
    margin-bottom: 10px;
}

#paypal-button-container {
    max-width: 420px;
    margin: 0 auto;
}

.paypal-hint,
.paypal-cookie {
    font-size: 12px;
    color: #1f2937;
    margin-bottom: 6px;
}

.paypal-legal {
    font-size: 12px;
    color: #4b5563;
}

@media (max-width: 640px) {
    .paypal-panel {
        padding: 14px;
    }

    .paypal-button-shell {
        padding: 10px;
    }
}