:root {
    font-family: "Space Grotesk", "Inter", "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    color: #f5f7fb;
    background-color: #101216;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: #111418;
    color: inherit;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.app-shell {
    width: min(960px, 100%);
    padding: 3rem 1.5rem 4rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.hero {
    text-align: center;
    padding: 2rem 1rem 0.5rem;
}

.hero h1 {
    margin: 0 0 1rem;
    font-size: clamp(2.25rem, 5vw, 3.8rem);
    font-weight: 700;
    letter-spacing: 0.035em;
}

.start-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: stretch;
}

.start-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 0.75rem;
    align-items: stretch;
}

.load-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.55rem 1.8rem;
    border-radius: 14px;
    background: linear-gradient(120deg, #f8c26b, #f9a13b);
    color: #050607;
    font-size: clamp(1.05rem, 3vw, 1.35rem);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    cursor: pointer;
    box-shadow: 0 18px 44px rgba(249, 161, 59, 0.35);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    position: relative;
}

.load-button.secondary {
    background: linear-gradient(120deg, #8bd8ff, #56b8ff);
    box-shadow: 0 18px 44px rgba(86, 184, 255, 0.35);
}

.enable-audio {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.7rem;
    padding: 0.65rem 1rem;
    min-width: 2.8rem;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: linear-gradient(135deg, #ff7b7b, #ff4040);
    color: #0d0e11;
    font-weight: 700;
    letter-spacing: 0.07em;
    cursor: pointer;
    box-shadow: 0 16px 36px rgba(255, 98, 98, 0.4);
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
}

.enable-audio__icon {
    width: 1.6rem;
    height: 1.6rem;
    position: relative;
}

.enable-audio__icon::before,
.enable-audio__icon::after {
    content: "";
    position: absolute;
    inset: 0;
    mask-size: contain;
    mask-repeat: no-repeat;
    mask-position: center;
    background: currentColor;
    transition: opacity 0.15s ease, transform 0.15s ease;
}

/* Speaker with slash (muted) */
.enable-audio__icon::before {
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23000' d='M3 9v6h4l5 5V4L7 9zm15.59-3.17L16 8.41 13.59 6 12 7.59 14.41 10 12 12.41 13.59 14 16 11.59l2.59 2.58L20 13.76l-2.59-2.59L20 8.59z'/%3E%3C/svg%3E");
    opacity: 1;
}

/* Speaker on (no slash) */
.enable-audio__icon::after {
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%23000' d='M3 9v6h4l5 5V4L7 9zm10.5 3a4.5 4.5 0 0 0-2.5-4.03v8.06A4.5 4.5 0 0 0 13.5 12zm2.5 0a7 7 0 0 0-5-6.708v2.084A4.994 4.994 0 0 1 16 12a4.994 4.994 0 0 1-5 4.624v2.084A7 7 0 0 0 16 12z'/%3E%3C/svg%3E");
    opacity: 0;
    transform: scale(0.9);
}

.enable-audio__text {
    font-size: 1.05rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.enable-audio:hover,
.enable-audio:focus-visible {
    background: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.26);
    transform: translateY(-1px);
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.35);
}

.enable-audio.is-on {
    background: linear-gradient(135deg, #6ddc71, #1ea34a);
    color: #050607;
    border-color: transparent;
    box-shadow: 0 14px 30px rgba(30, 163, 74, 0.35);
}

.enable-audio.is-on .enable-audio__icon::before {
    opacity: 0;
    transform: scale(0.9);
}

.enable-audio.is-on .enable-audio__icon::after {
    opacity: 1;
    transform: scale(1);
}

.load-button:hover,
.load-button:focus-within {
    transform: translateY(-3px);
    box-shadow: 0 30px 70px rgba(249, 161, 59, 0.45);
}

.load-button.is-disabled {
    opacity: 0.35;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
    background: linear-gradient(120deg, #c7c7c7, #9f9f9f);
}

.sample-select {
    width: 100%;
    min-width: 220px;
    padding: 0.75rem 1rem;
    border-radius: 10px;
    border: 1px solid rgba(255, 193, 94, 0.6);
    background: rgba(255, 255, 255, 0.08);
    color: #f5f7fb;
    font-weight: 600;
    letter-spacing: 0.03em;
}

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

.help-toggle {
    position: fixed !important;
    top: 1rem !important;
    left: 1rem !important;
    z-index: 30;
    width: 3rem;
    height: 3rem;
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.85);
    background: linear-gradient(135deg, #4fa1ff, #2b74ff);
    color: #ffffff;
    font-weight: 900;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    letter-spacing: 0.08em;
    cursor: pointer;
    box-shadow: 0 14px 34px rgba(43, 116, 255, 0.35);
    transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.help-toggle:hover,
.help-toggle:focus-visible {
    background: linear-gradient(135deg, #63acff, #3b82ff);
    box-shadow: 0 16px 38px rgba(43, 116, 255, 0.45);
    transform: translateY(-1px);
}

.info-toggle {
    position: fixed !important;
    top: 1rem !important;
    right: 1rem !important;
    z-index: 30;
    width: 3rem;
    height: 3rem;
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.85);
    background: linear-gradient(135deg, #4fa1ff, #2b74ff);
    color: #ffffff;
    font-weight: 900;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    letter-spacing: 0.08em;
    cursor: pointer;
    box-shadow: 0 14px 34px rgba(43, 116, 255, 0.35);
    transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.info-toggle:hover,
.info-toggle:focus-visible {
    background: linear-gradient(135deg, #63acff, #3b82ff);
    box-shadow: 0 16px 38px rgba(43, 116, 255, 0.45);
    transform: translateY(-1px);
}

.help-bubbles {
    position: fixed !important;
    top: 4.2rem !important;
    left: 1rem !important;
    z-index: 25;
    display: grid;
    gap: 0.6rem;
    margin-top: 0;
}

.help-bubble {
    position: relative;
    max-width: 260px;
    padding: 0.75rem 0.95rem;
    border-radius: 12px;
    background: rgba(31, 41, 55, 0.72);
    color: #eef2f7;
    border: 1px solid rgba(255, 255, 255, 0.14);
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.35);
    font-size: 0.95rem;
}

.help-bubble strong {
    color: #8bd8ff;
}

.help-bubble a {
    color: #f5b23c;
    font-weight: 700;
    text-decoration: none;
}

.help-bubble a:hover,
.help-bubble a:focus-visible {
    text-decoration: underline;
}

.help-bubble--audio {
    grid-row: 1;
}

.help-bubble--load {
    grid-row: 2;
}

.help-bubble--controls {
    grid-row: 3;
}

.help-bubble--record {
    grid-row: 4;
}

.help-dismiss {
    justify-self: start;
    margin-top: 0.25rem;
    padding: 0.45rem 0.85rem;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.12);
    color: #fefefe;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.15s ease;
}

.help-dismiss:hover,
.help-dismiss:focus-visible {
    background: rgba(255, 255, 255, 0.18);
    transform: translateY(-1px);
}

.info-bubbles {
    position: fixed !important;
    top: 4.2rem !important;
    right: 1rem !important;
    z-index: 25;
    display: grid;
    gap: 0.6rem;
    margin-top: 0;
}

.info-bubble {
    position: relative;
    max-width: 260px;
    padding: 0.75rem 0.95rem;
    border-radius: 12px;
    background: rgba(31, 41, 55, 0.72);
    color: #eef2f7;
    border: 1px solid rgba(255, 255, 255, 0.14);
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.35);
    font-size: 0.95rem;
}

.info-bubble strong {
    color: #8bd8ff;
}

.info-bubble a {
    color: #f5b23c;
    font-weight: 700;
    text-decoration: none;
}

.info-bubble a:hover,
.info-bubble a:focus-visible {
    text-decoration: underline;
}

.info-dismiss {
    justify-self: start;
    margin-top: 0.25rem;
    padding: 0.45rem 0.85rem;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.12);
    color: #fefefe;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.15s ease, transform 0.15s ease;
}

.info-dismiss:hover,
.info-dismiss:focus-visible {
    background: rgba(255, 255, 255, 0.18);
    transform: translateY(-1px);
}

.contact-panel h2 {
    margin-bottom: 0.75rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.contact-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.75rem;
}

.contact-form label {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.78);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 0.65rem 0.8rem;
    border-radius: 10px;
    border: 1px solid rgba(255, 193, 94, 0.6);
    background: rgba(255, 255, 255, 0.08);
    color: #f5f7fb;
    font-size: 0.95rem;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: 1px solid rgba(255, 193, 94, 0.9);
}

.contact-form textarea {
    resize: vertical;
}

.contact-submit {
    align-self: flex-start;
    padding: 0.65rem 1.4rem;
    border-radius: 10px;
    border: 1px solid rgba(255, 193, 94, 0.9);
    background: linear-gradient(135deg, #fbd768, #ff9b3f);
    color: #050607;
    font-weight: 700;
    letter-spacing: 0.05em;
    cursor: pointer;
    box-shadow: 0 12px 30px rgba(255, 160, 68, 0.35);
    transition: transform 0.15s ease, box-shadow 0.2s ease;
}

.contact-submit:hover,
.contact-submit:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 14px 34px rgba(255, 160, 68, 0.45);
}

.contact-status {
    min-height: 1.2rem;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.78);
}

.contact-modal__content {
    max-width: 600px;
    width: min(90vw, 600px);
}

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

.status-box {
    padding: 0.9rem 1rem 1.1rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.03);
    text-align: left;
}

.status-text {
    min-height: 1.4em;
    color: #fce3c1;
    font-size: 0.98rem;
}

.status-text.error {
    color: #ffb4b4;
}

.status-progress {
    margin-top: 0.65rem;
    width: 100%;
    height: 8px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.08);
    overflow: hidden;
}

.status-progress__bar {
    width: 0%;
    height: 100%;
    background: linear-gradient(120deg, #8bd8ff, #56b8ff);
    transition: width 0.25s ease;
}

.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.is-hidden {
    display: none;
}

.modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    backdrop-filter: blur(2px);
}

.modal__content {
    position: relative;
    z-index: 1;
    width: min(420px, 90vw);
    padding: 1.2rem 1.4rem;
    border-radius: 16px;
    background: rgba(12, 14, 18, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 30px 70px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.modal__label {
    text-align: left;
    color: rgba(255, 255, 255, 0.85);
    font-weight: 600;
    letter-spacing: 0.03em;
    margin-top: 0.2rem;
}

.modal__actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.6rem;
    margin-top: 0.4rem;
}

.modal__button {
    border: none;
    border-radius: 999px;
    padding: 0.75rem 1.6rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.modal__button.primary {
    background: linear-gradient(120deg, #8bd8ff, #56b8ff);
    color: #071018;
    box-shadow: 0 15px 35px rgba(86, 184, 255, 0.35);
}

.modal__button.ghost {
    background: rgba(255, 255, 255, 0.08);
    color: #f5f7fb;
    border: 1px solid rgba(255, 255, 255, 0.18);
}

.modal__button:hover,
.modal__button:focus-visible {
    transform: translateY(-1px);
}

.panel {
    background: rgba(32, 35, 42, 0.82);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 18px;
    padding: 1.6rem;
    box-shadow: 0 40px 90px rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(12px);
}

.panel h2 {
    margin: 0 0 1rem;
    font-size: 1.2rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.85);
}

.song-title {
    margin: -0.4rem 0 0.8rem;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.75);
    letter-spacing: 0.01em;
}

.is-hidden {
    display: none;
}

#song-display {
    width: 100%;
    min-height: 190px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(10, 12, 16, 0.72);
    color: inherit;
    padding: 1rem;
    font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
    font-size: 0.95rem;
    resize: vertical;
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.controls__buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

#play {
    background: linear-gradient(135deg, #63e174, #1ea34a);
    color: #071408;
    box-shadow: 0 18px 40px rgba(30, 163, 74, 0.35);
}

#play:not(:disabled):hover,
#play:not(:disabled):focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 20px 46px rgba(30, 163, 74, 0.45);
}

#stop {
    background: linear-gradient(135deg, #ff8a8a, #ff4040);
    color: #180505;
    box-shadow: 0 18px 40px rgba(255, 64, 64, 0.35);
}

#stop:not(:disabled):hover,
#stop:not(:disabled):focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 20px 46px rgba(255, 64, 64, 0.45);
}

button {
    border: none;
    border-radius: 12px;
    padding: 0.85rem 2.2rem;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    cursor: pointer;
    color: #050607;
    background: linear-gradient(135deg, #fbd768, #ff9b3f);
    box-shadow: 0 20px 38px rgba(255, 160, 68, 0.35);
    transition: transform 0.15s ease, opacity 0.15s ease;
}

button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    box-shadow: none;
}

button:not(:disabled):hover {
    transform: translateY(-2px);
}

.record-button {
    background: linear-gradient(135deg, #ff6b6b, #ff4757);
    box-shadow: 0 18px 42px rgba(255, 99, 99, 0.35);
    color: #050607;
    margin-top: 0.35rem;
}

.record-button.recording {
    background: linear-gradient(135deg, #3dd598, #2ac085);
    box-shadow: 0 18px 42px rgba(58, 214, 152, 0.35);
}

.transport__progress {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.tempo-control {
    margin-top: 0.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.tempo-control label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.75);
}

.tempo-control__value {
    font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8);
}

.scale-controls {
    margin-top: 0.75rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
}

.mode-control,
.transpose-control {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.mode-control label,
.transpose-control label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.75);
}

.mode-control select,
.transpose-control input[type="number"] {
    border-radius: 12px;
    border: 1px solid rgba(255, 193, 94, 0.6);
    background: rgba(4, 6, 9, 0.65);
    color: inherit;
    padding: 0.45rem 0.9rem;
    font-size: 0.95rem;
}

.mode-status,
.transpose-status {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.65);
}

.transpose-input {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 0.35rem;
    align-items: center;
}

#transpose-input {
    text-align: center;
    width: 100%;
    padding: 0.45rem 0.4rem;
}

#transpose-decrement,
#transpose-increment {
    padding: 0.45rem 0.9rem;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 193, 94, 0.6);
    color: #f5f7fb;
    box-shadow: none;
}

#transpose-decrement:disabled,
#transpose-increment:disabled {
    opacity: 0.35;
}

.tempo-reset {
    align-self: flex-start;
    padding: 0.4rem 1.25rem;
    border-radius: 12px;
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background: rgba(255, 255, 255, 0.12);
    color: #f5f7fb;
    border: 1px solid rgba(255, 193, 94, 0.6);
    cursor: pointer;
}

.tempo-reset:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.tuning-reset {
    align-self: flex-start;
    padding: 0.4rem 1.25rem;
    border-radius: 12px;
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    background: rgba(255, 255, 255, 0.12);
    color: #f5f7fb;
    border: 1px solid rgba(255, 193, 94, 0.6);
    cursor: pointer;
}

.tuning-reset:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.tuning-control {
    margin-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.tuning-control label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.75);
}

#tuning-select {
    border-radius: 12px;
    border: 1px solid rgba(255, 193, 94, 0.6);
    background: rgba(0, 0, 0, 0.35);
    color: inherit;
    padding: 0.65rem 0.85rem;
    font-size: 0.95rem;
    font-weight: 500;
}

.tuning-status {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.65);
}

.tuning-status.error {
    color: #ffb4b4;
}

input[type="range"] {
    width: 100%;
    appearance: none;
    height: 6px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.15);
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 0 0 2px rgba(0,0,0,0.2);
    cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 0 0 2px rgba(0,0,0,0.2);
    cursor: pointer;
}

.controls__time {
    text-align: center;
    font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.75);
}

.loop-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.85);
    justify-content: flex-start;
    margin-top: 0.35rem;
    align-self: flex-start;
}

.record-option {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.35rem;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.92rem;
}

.instrument-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1rem;
}

.instrument-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 14px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: background 0.2s ease, border-color 0.2s ease;
}

.instrument-card.is-active {
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(255, 255, 255, 0.18);
}

.instrument-card__label {
    font-size: 0.95rem;
    font-weight: 600;
}

.instrument-meter {
    width: 100%;
    height: 6px;
    border-radius: 999px;
    background: repeating-linear-gradient(
        to right,
        rgba(255, 255, 255, 0.08) 0,
        rgba(255, 255, 255, 0.08) 10px,
        transparent 10px,
        transparent 12px
    );
    overflow: hidden;
}

.instrument-meter__fill {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #7ddb5f, #f1d164);
    transform-origin: left center;
    transform: scaleX(0);
    opacity: 0.15;
    transition: transform 0.08s linear, opacity 0.12s ease;
}

.instrument-card__name {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

.instrument-card select {
    width: 100%;
    border-radius: 12px;
    border: 1px solid rgba(255, 193, 94, 0.6);
    background: rgba(0, 0, 0, 0.35);
    color: inherit;
    padding: 0.65rem 0.85rem;
    font-size: 0.95rem;
    font-weight: 500;
}

/* Tablet and larger devices: 768px+ */
@media (max-width: 767px) {
    /* Stack buttons vertically on small tablets */
    .start-actions {
        grid-template-columns: 1fr;
    }

    /* Help and Info bubbles: convert to full-width on tablets */
    .help-toggle,
    .info-toggle {
        width: 2.8rem;
        height: 2.8rem;
        font-size: 0.85rem;
    }

    .help-bubbles,
    .info-bubbles {
        position: static !important;
        display: none;
        max-width: 100%;
        margin-top: 1rem;
        gap: 0.5rem;
    }

    .help-bubbles.is-shown,
    .info-bubbles.is-shown {
        display: grid;
    }

    .help-bubble,
    .info-bubble {
        max-width: 100%;
        padding: 0.85rem 1rem;
        font-size: 1rem;
    }

    /* Stack scale controls vertically */
    .scale-controls {
        grid-template-columns: 1fr;
    }

    /* Optimize button padding for touch on tablets */
    button {
        min-height: 44px;
        padding: 0.75rem 1.5rem;
    }

    .enable-audio {
        min-height: 44px;
        padding: 0.65rem 1rem;
    }

    .load-button {
        min-height: 44px;
        padding: 0.65rem 1.5rem;
    }

    /* Modal adjustments for tablets */
    .modal__content {
        padding: 1.4rem;
        width: min(95vw, 420px);
    }

    .contact-modal__content {
        width: min(95vw, 500px);
    }

    /* Larger touch targets for form inputs */
    .contact-form input,
    .contact-form textarea,
    select,
    input[type="range"] {
        min-height: 44px;
        font-size: 16px; /* Prevents mobile zoom on focus */
    }

    /* Reduce padding for panels on tablets */
    .panel {
        padding: 1.4rem 1.2rem;
    }

    .hero {
        padding: 1.5rem 0.75rem 0.5rem;
    }
}

/* Mobile devices: 480px and below */
@media (max-width: 479px) {
    /* Adjust main container padding */
    .app-shell {
        padding: 2rem 1rem 3rem;
        gap: 1rem;
    }

    /* Smaller heading on mobile */
    .hero h1 {
        font-size: clamp(1.75rem, 4vw, 2.25rem);
        margin: 0 0 0.75rem;
    }

    /* Stack all buttons in start-actions */
    .start-actions {
        grid-template-columns: 1fr;
        gap: 0.6rem;
    }

    /* Single column load button */
    .load-button {
        width: 100%;
        font-size: 1rem;
        padding: 0.6rem 1rem;
        min-height: 44px;
    }

    .enable-audio {
        width: 100%;
        min-height: 44px;
    }

    .enable-audio__text {
        font-size: 0.95rem;
    }

    /* Reduce fixed button sizes */
    .help-toggle,
    .info-toggle {
        width: 2.6rem;
        height: 2.6rem;
        font-size: 0.75rem;
        top: 0.75rem !important;
    }

    .help-toggle {
        left: 0.75rem !important;
    }

    .info-toggle {
        right: 0.75rem !important;
    }

    /* Help/Info bubbles as modal-like elements */
    .help-bubbles,
    .info-bubbles {
        position: relative !important;
        top: auto !important;
        left: auto !important;
        right: auto !important;
        display: none;
        background: rgba(31, 41, 55, 0.95);
        border-radius: 14px;
        padding: 1rem;
        margin: 0.5rem 0;
        z-index: 20;
    }

    .help-bubbles.is-shown,
    .info-bubbles.is-shown {
        display: grid;
    }

    .help-bubble,
    .info-bubble {
        max-width: 100%;
        padding: 0.9rem 1rem;
        font-size: 0.95rem;
        background: transparent;
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: 10px;
    }

    .help-bubble + .help-bubble,
    .info-bubble + .info-bubble {
        margin-top: 0.5rem;
    }

    /* Panel and control adjustments */
    .panel {
        padding: 1.2rem 1rem;
        border-radius: 14px;
    }

    .panel h2 {
        font-size: 1rem;
        margin: 0 0 0.8rem;
    }

    /* Status box adjustments */
    .status-box {
        padding: 0.8rem 0.9rem;
        border-radius: 10px;
    }

    .status-text {
        font-size: 0.9rem;
    }

    /* Song display */
    #song-display {
        min-height: 150px;
        padding: 0.8rem;
        font-size: 0.9rem;
        border-radius: 12px;
    }

    /* Controls button stacking */
    .controls__buttons {
        flex-direction: column;
        gap: 0.7rem;
    }

    button {
        width: 100%;
        padding: 0.7rem 1rem;
        font-size: 0.95rem;
        min-height: 44px;
    }

    /* Transport progress */
    .transport__progress {
        gap: 0.6rem;
        margin-bottom: 0.5rem;
    }

    .controls__time {
        font-size: 0.85rem;
        white-space: nowrap;
    }

    /* Tempo control adjustments */
    .tempo-control {
        gap: 0.3rem;
    }

    .tempo-control label {
        font-size: 0.8rem;
    }

    .tempo-control__value {
        font-size: 0.8rem;
    }

    .tempo-reset {
        font-size: 0.75rem;
        padding: 0.35rem 1rem;
    }

    /* Tuning control */
    .tuning-control {
        gap: 0.3rem;
    }

    .tuning-control label {
        font-size: 0.8rem;
    }

    .tuning-status {
        font-size: 0.8rem;
    }

    .tuning-reset {
        font-size: 0.75rem;
        padding: 0.35rem 1rem;
    }

    /* Scale controls: full-width single column */
    .scale-controls {
        grid-template-columns: 1fr;
        gap: 0.8rem;
        margin-top: 0.5rem;
    }

    .mode-control,
    .transpose-control {
        gap: 0.3rem;
    }

    .mode-control label,
    .transpose-control label {
        font-size: 0.8rem;
    }

    .mode-control select,
    .transpose-control input[type="number"] {
        padding: 0.5rem 0.8rem;
        font-size: 0.9rem;
        min-height: 40px;
    }

    .mode-status,
    .transpose-status {
        font-size: 0.8rem;
    }

    /* Transpose input buttons */
    #transpose-decrement,
    #transpose-increment {
        padding: 0.4rem 0.7rem;
        font-size: 0.95rem;
        min-width: 40px;
        min-height: 40px;
    }

    .transpose-input {
        gap: 0.3rem;
    }

    /* Tuning control */
    .tuning-control {
        gap: 0.3rem;
    }

    .tuning-control label {
        font-size: 0.8rem;
    }

    .tuning-status {
        font-size: 0.8rem;
    }

    /* Instrument grid */
    .instrument-grid {
        display: grid;
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    /* Form inputs */
    .contact-form input,
    .contact-form textarea,
    select,
    input[type="range"],
    input[type="file"] {
        font-size: 16px; /* Prevents mobile zoom on focus */
        min-height: 44px;
        padding: 0.7rem 0.8rem;
    }

    .contact-form textarea {
        min-height: 100px;
    }

    /* Contact row */
    .contact-row {
        grid-template-columns: 1fr;
        gap: 0.6rem;
    }

    .contact-form label {
        gap: 0.3rem;
    }

    /* Modal adjustments for mobile */
    .modal__content {
        width: min(90vw, 400px);
        padding: 1.2rem 1rem;
        border-radius: 14px;
    }

    .modal__actions {
        flex-direction: column;
        gap: 0.5rem;
    }

    .modal__button {
        width: 100%;
        padding: 0.7rem 1.2rem;
        font-size: 0.95rem;
        min-height: 44px;
    }

    .contact-modal__content {
        width: min(90vw, 380px);
    }

    /* Loop toggle and record option */
    .loop-toggle,
    .record-option {
        font-size: 0.95rem;
    }

    input[type="checkbox"] {
        cursor: pointer;
        width: 18px;
        height: 18px;
    }
}

/* Small landscape phones: 480px to 767px and aspect ratio consideration */
@media (max-width: 767px) and (orientation: landscape) {
    .app-shell {
        padding: 1rem 1rem 2rem;
        gap: 0.8rem;
    }

    .hero h1 {
        font-size: clamp(1.5rem, 3vw, 2rem);
        margin: 0 0 0.5rem;
    }

    .start-actions {
        gap: 0.5rem;
    }

    .load-button,
    button {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }

    .panel {
        padding: 1rem 0.9rem;
    }

    .controls__buttons {
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    button {
        min-height: 36px;
        padding: 0.5rem 1rem;
    }
}

/* Print styles for accessibility */
@media print {
    .help-toggle,
    .info-toggle,
    .help-bubbles,
    .info-bubbles {
        display: none;
    }
}