:root {
    --color-bg: #f4f1eb;
    --color-surface: rgba(255, 255, 255, 0.88);
    --color-surface-strong: #ffffff;
    --color-text: #1f2933;
    --color-muted: #667085;
    --color-accent: #136f63;
    --color-accent-soft: #d9efe9;
    --color-border: rgba(19, 111, 99, 0.12);
    --color-shadow: rgba(15, 23, 42, 0.08);
    --color-status-idle: #b54708;
    --gradient-hero: linear-gradient(180deg, rgba(255, 255, 255, 0.88) 0%, rgba(255, 255, 255, 0.72) 100%);
    --radius-card: 24px;
    --radius-pill: 999px;
    --nav-height: 88px;
    --content-width: 720px;
    --shadow-card: 0 20px 40px -28px var(--color-shadow);
    --shadow-nav: 0 -10px 30px -24px rgba(15, 23, 42, 0.3);
}

* {
    box-sizing: border-box;
}

html {
    font-size: 16px;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Manrope", sans-serif;
    color: var(--color-text);
    background:
        radial-gradient(circle at top left, rgba(19, 111, 99, 0.14), transparent 32%),
        radial-gradient(circle at top right, rgba(211, 160, 86, 0.18), transparent 26%),
        linear-gradient(180deg, #f8f5ef 0%, var(--color-bg) 100%);
}

button,
input,
textarea,
select {
    font: inherit;
}

button {
    border: 0;
    background: none;
    color: inherit;
}

img {
    display: block;
    max-width: 100%;
}

.app-shell {
    width: min(100%, var(--content-width));
    margin: 0 auto;
    min-height: 100vh;
    padding: 1rem 1rem calc(var(--nav-height) + env(safe-area-inset-bottom) + 1.25rem);
}

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.5rem 0 1.25rem;
}

.eyebrow,
.section-kicker,
.exercise-card__muscle {
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.72rem;
    font-weight: 800;
    color: var(--color-accent);
}

.app-header h1,
.section-intro h2,
.placeholder-card h3 {
    margin: 0;
}

.app-header h1 {
    font-size: clamp(1.8rem, 6vw, 2.7rem);
    line-height: 1.05;
}

.header-action {
    width: 3rem;
    height: 3rem;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--color-surface);
    box-shadow: var(--shadow-card);
    color: var(--color-muted);
}

.app-content {
    display: grid;
}

.tab-panel {
    animation: panel-in 220ms ease;
}

.section-intro {
    padding: 1.4rem;
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 28px;
    background: var(--gradient-hero);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-card);
}

.section-intro h2 {
    margin-top: 0.4rem;
    font-size: 1.5rem;
}

.section-intro p:last-child,
.placeholder-card p {
    margin-bottom: 0;
    color: var(--color-muted);
    line-height: 1.55;
}

.card-stack {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.card-stack:empty {
    display: none;
}

.surface-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    background: var(--color-surface-strong);
    box-shadow: var(--shadow-card);
}

.placeholder-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.1rem;
}

.placeholder-icon {
    flex: 0 0 4rem;
    width: 4rem;
    height: 4rem;
    display: grid;
    place-items: center;
    border-radius: 1.25rem;
    background: var(--color-accent-soft);
    color: var(--color-accent);
    font-weight: 800;
}

.status-pill {
    display: inline-flex;
    align-items: center;
    padding: 0.45rem 0.8rem;
    border-radius: var(--radius-pill);
    background: #fff3e0;
    color: var(--color-status-idle);
    font-size: 0.85rem;
    font-weight: 700;
}

.status-pill.is-connected {
    background: #def7ec;
    color: #067647;
}

.search-card,
.workout-summary-card,
.empty-state {
    margin-top: 1rem;
    padding: 1rem;
}

.search-field {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.85rem 1rem;
    border: 1px solid rgba(19, 111, 99, 0.12);
    border-radius: 1.2rem;
    background: rgba(19, 111, 99, 0.03);
}

.search-field:focus-within {
    border-color: rgba(19, 111, 99, 0.4);
    box-shadow: 0 0 0 4px rgba(19, 111, 99, 0.08);
}

.search-field__icon {
    display: grid;
    place-items: center;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    background: var(--color-accent-soft);
    color: var(--color-accent);
    font-size: 0.78rem;
    font-weight: 800;
}

.search-field__input {
    width: 100%;
    border: 0;
    outline: 0;
    background: transparent;
    color: var(--color-text);
}

.search-field__input::placeholder {
    color: #7a8798;
}

.search-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 0.9rem;
}

.search-meta__label,
.search-meta__value,
.workout-summary-card__count,
.workout-summary-card__text,
.empty-state h3,
.empty-state p,
.exercise-card__description {
    margin: 0;
}

.search-meta__label,
.workout-summary-card__text {
    color: var(--color-muted);
}

.search-meta__value,
.workout-summary-card__count {
    font-weight: 800;
    color: var(--color-text);
}

.workout-summary-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.workout-summary-card__count {
    font-size: 2rem;
    line-height: 1;
    margin-top: 0.25rem;
}

.empty-state {
    text-align: center;
    background: rgba(255, 255, 255, 0.72);
}

.empty-state h3 {
    font-size: 1.05rem;
}

.empty-state p {
    margin-top: 0.45rem;
    color: var(--color-muted);
    line-height: 1.5;
}

.bottom-nav {
    position: fixed;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: min(100%, var(--content-width));
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    padding: 0.85rem 1rem calc(0.85rem + env(safe-area-inset-bottom));
    background: rgba(247, 243, 237, 0.92);
    backdrop-filter: blur(14px);
    box-shadow: var(--shadow-nav);
    border-top: 1px solid rgba(19, 111, 99, 0.08);
}

.nav-item {
    min-height: 3.75rem;
    display: grid;
    place-items: center;
    gap: 0.2rem;
    padding: 0.65rem 0.5rem;
    border-radius: 1.25rem;
    color: var(--color-muted);
    transition: transform 160ms ease, background-color 160ms ease, color 160ms ease;
}

.nav-item.is-active {
    background: var(--color-surface-strong);
    color: var(--color-accent);
    box-shadow: 0 14px 24px -22px rgba(19, 111, 99, 0.75);
}

.nav-item:active {
    transform: translateY(1px);
}

.nav-icon {
    width: 2rem;
    height: 2rem;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: rgba(19, 111, 99, 0.08);
    font-size: 0.8rem;
    font-weight: 800;
}

.nav-label {
    font-size: 0.78rem;
    font-weight: 700;
}

.exercise-card {
    display: grid;
    grid-template-columns: 5rem 1fr;
    gap: 1rem;
    align-items: center;
    padding: 0.9rem;
    width: 100%;
    text-align: left;
    transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.exercise-card.is-selectable {
    cursor: pointer;
}

.exercise-card.is-selectable:hover,
.exercise-card.is-selectable:focus-visible {
    transform: translateY(-2px);
    border-color: rgba(19, 111, 99, 0.28);
    box-shadow: 0 24px 36px -28px rgba(19, 111, 99, 0.4);
    outline: 0;
}

.exercise-card__image-wrap {
    aspect-ratio: 1;
    border-radius: 1.25rem;
    overflow: hidden;
    background: linear-gradient(135deg, #d8efe6, #f3ede2);
}

.exercise-card__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.exercise-card__title {
    margin: 0.35rem 0 0;
    font-size: 1rem;
}

.exercise-card__description {
    margin-top: 0.4rem;
    color: var(--color-muted);
    line-height: 1.45;
}

.exercise-card__badge {
    display: inline-flex;
    align-items: center;
    margin-top: 0.75rem;
    padding: 0.4rem 0.7rem;
    border-radius: var(--radius-pill);
    background: rgba(19, 111, 99, 0.08);
    color: var(--color-accent);
    font-size: 0.78rem;
    font-weight: 700;
}

.workout-controls {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.85rem;
    margin-top: 1rem;
}

.stepper {
    padding: 0.9rem;
    border-radius: 1rem;
    background: rgba(19, 111, 99, 0.05);
}

.stepper__label {
    margin: 0;
    color: var(--color-muted);
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.stepper__controls {
    display: grid;
    grid-template-columns: 2.75rem 1fr 2.75rem;
    gap: 0.55rem;
    align-items: center;
    margin-top: 0.7rem;
}

.stepper__button {
    min-height: 2.75rem;
    display: grid;
    place-items: center;
    border-radius: 0.9rem;
    background: var(--color-surface-strong);
    border: 1px solid rgba(19, 111, 99, 0.14);
    color: var(--color-accent);
    font-size: 1.15rem;
    font-weight: 800;
    box-shadow: 0 12px 18px -18px rgba(15, 23, 42, 0.5);
}

.stepper__button:disabled,
.workout-action:disabled {
    opacity: 0.45;
}

.stepper__value {
    display: grid;
    place-items: center;
    min-height: 2.75rem;
    border-radius: 0.9rem;
    background: rgba(255, 255, 255, 0.8);
    font-weight: 800;
}

.workout-actions {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.65rem;
    margin-top: 1rem;
}

.workout-action {
    min-height: 3rem;
    padding: 0.8rem 0.65rem;
    border-radius: 1rem;
    background: rgba(19, 111, 99, 0.06);
    border: 1px solid rgba(19, 111, 99, 0.12);
    color: var(--color-text);
    font-weight: 700;
    text-align: center;
}

.workout-action.is-danger {
    background: rgba(179, 54, 54, 0.08);
    border-color: rgba(179, 54, 54, 0.16);
    color: #a33b32;
}

.pairing-status-card,
.pairing-feedback {
    margin-top: 1rem;
    padding: 1rem;
}

.pairing-status-card__header,
.pairing-card__header,
.pairing-code-panel,
.pairing-sync-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.pairing-status-card__eyebrow,
.pairing-card__status,
.pairing-card__copy,
.pairing-card__meta-label,
.pairing-sync-card__label,
.pairing-sync-card__value,
.input-field__label,
.pairing-feedback {
    margin: 0;
}

.pairing-status-card h3,
.pairing-card h3,
.pairing-card__meta-value,
.pairing-code-panel__value {
    margin: 0;
}

.pairing-status-card__eyebrow,
.pairing-card__status,
.pairing-card__copy,
.pairing-card__meta-label,
.pairing-sync-card__label,
.pairing-sync-card__value,
.input-field__label {
    color: var(--color-muted);
}

.pairing-status-card h3 {
    margin-top: 0.9rem;
    font-size: 1.2rem;
}

.pairing-status-card > p {
    margin: 0.45rem 0 0;
    color: var(--color-muted);
    line-height: 1.5;
}

.pairing-sync-card {
    margin-top: 1rem;
    padding: 0.9rem 1rem;
    border-radius: 1rem;
    background: rgba(19, 111, 99, 0.05);
}

.pairing-layout {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.pairing-card {
    padding: 1rem;
}

.pairing-card__header {
    align-items: flex-start;
}

.pairing-card__status {
    text-align: right;
    font-size: 0.88rem;
    font-weight: 700;
}

.pairing-card h3 {
    margin-top: 0.5rem;
}

.pairing-card__copy {
    margin-top: 0.35rem;
    line-height: 1.5;
}

.pairing-form {
    display: grid;
    gap: 0.9rem;
    margin-top: 1rem;
}

.pairing-form--inline {
    margin-top: 1rem;
}

.input-field {
    display: grid;
    gap: 0.45rem;
}

.input-field__label {
    font-size: 0.84rem;
    font-weight: 700;
}

.input-field__control {
    min-height: 3.2rem;
    width: 100%;
    padding: 0.9rem 1rem;
    border: 1px solid rgba(19, 111, 99, 0.14);
    border-radius: 1rem;
    background: rgba(19, 111, 99, 0.03);
    color: var(--color-text);
    outline: 0;
}

.input-field__control:focus {
    border-color: rgba(19, 111, 99, 0.4);
    box-shadow: 0 0 0 4px rgba(19, 111, 99, 0.08);
}

.input-field__control--code {
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.action-button {
    min-height: 3.2rem;
    padding: 0.9rem 1rem;
    border-radius: 1rem;
    background: var(--color-accent);
    color: #ffffff;
    font-weight: 800;
    box-shadow: 0 16px 28px -20px rgba(19, 111, 99, 0.8);
}

.action-button:disabled {
    opacity: 0.45;
}

.action-button--secondary {
    background: rgba(19, 111, 99, 0.1);
    color: var(--color-accent);
    box-shadow: none;
}

.pairing-card__meta {
    margin-top: 1rem;
}

.pairing-card__meta-value {
    margin-top: 0.25rem;
    font-size: 1rem;
    font-weight: 800;
}

.pairing-code-panel {
    margin-top: 1rem;
    padding: 0.9rem 1rem;
    border-radius: 1rem;
    background: rgba(19, 111, 99, 0.05);
}

.pairing-code-panel__value {
    margin-top: 0.2rem;
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: 0.18em;
}

.pairing-feedback {
    color: var(--color-text);
    font-weight: 700;
}

.pairing-feedback.is-success {
    background: rgba(6, 118, 71, 0.08);
    border-color: rgba(6, 118, 71, 0.14);
    color: #067647;
}

.pairing-feedback.is-error {
    background: rgba(179, 54, 54, 0.08);
    border-color: rgba(179, 54, 54, 0.14);
    color: #a33b32;
}

@keyframes panel-in {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (min-width: 768px) {
    .app-shell {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }

    .section-intro,
    .placeholder-card {
        padding: 1.5rem;
    }

    .search-card,
    .workout-summary-card,
    .empty-state,
    .pairing-status-card,
    .pairing-feedback,
    .pairing-card {
        padding: 1.25rem;
    }

    .pairing-layout {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 420px) {
    .workout-controls,
    .workout-actions {
        grid-template-columns: 1fr;
    }
}