:root {
    --cardio-ink: #24332f;
    --cardio-muted: #687873;
    --cardio-green: #1f6b5b;
    --cardio-dark: #174e44;
    --cardio-gold: #b58b45;
    --cardio-paper: #fbfaf6;
    --cardio-line: #dfe5df;
    --cardio-shadow: 0 12px 30px rgba(30, 58, 49, .09)
}

* {
    box-sizing: border-box
}

body {
    margin: 0;
    background: #f1f4f1;
    color: var(--cardio-ink);
    font-family: Segoe UI, Tahoma, sans-serif
}

.cardioPage {
    max-width: 1240px;
    margin: 70px auto 0;
    padding: 30px 24px 60px
}

.cardioHero {
    margin-bottom: 22px;
    padding: 30px clamp(18px, 4vw, 48px);
    background: linear-gradient(115deg, #e7f0eb, var(--cardio-paper) 70%);
    border: 1px solid var(--cardio-line);
    border-top: 4px solid var(--cardio-gold);
    box-shadow: var(--cardio-shadow)
}

.cardioHero h1 {
    margin: 0 0 8px;
    color: var(--cardio-ink);
    font-size: clamp(1.5rem, 3vw, 2.35rem);
    letter-spacing: .06em
}

.cardioHero p {
    max-width: 780px;
    margin: 0;
    color: var(--cardio-muted);
    line-height: 1.55
}

.cardioLayout {
    display: grid;
    grid-template-columns: minmax(280px, .78fr) minmax(0, 1.22fr);
    gap: 20px;
    align-items: start
}

.cardioPanel {
    padding: 22px;
    background: var(--cardio-paper);
    border: 1px solid var(--cardio-line);
    border-radius: 6px;
    box-shadow: var(--cardio-shadow)
}

.cardioPanel h2 {
    margin: 0 0 18px;
    color: var(--cardio-dark);
    font-size: 1.05rem;
    letter-spacing: .1em;
    text-transform: uppercase
}

.planForm {
    display: grid;
    gap: 12px
}

.field {
    display: flex;
    flex-direction: column;
    color: var(--cardio-muted);
    font-size: .84rem;
    font-weight: 600
}

.field input,
.field textarea {
    width: 100%;
    min-height: 43px;
    margin-top: 6px;
    padding: 0 11px;
    border: 1px solid #b9cbc4;
    border-radius: 4px;
    background: #fff;
    color: var(--cardio-ink);
    font: inherit
}

.field textarea {
    min-height: 78px;
    padding: 11px;
    resize: vertical
}

.field input:focus,
.field textarea:focus {
    border-color: var(--cardio-green);
    box-shadow: 0 0 0 3px rgba(31, 107, 91, .12);
    outline: none
}

.roundGrid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px
}

.formActions,
.timerActions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px
}

.cardioButton {
    min-height: 40px;
    padding: 0 14px;
    border: 1px solid var(--cardio-green);
    border-radius: 4px;
    background: var(--cardio-green);
    color: #fff;
    cursor: pointer;
    font: inherit;
    font-weight: 700
}

.cardioButton.secondary {
    background: transparent;
    color: var(--cardio-dark);
    border-color: var(--cardio-line)
}

.cardioButton:hover {
    box-shadow: 0 8px 16px rgba(31, 107, 91, .18);
    transform: translateY(-1px)
}

.cardioStatus {
    min-height: 20px;
    color: #a45e4c;
    font-size: .84rem
}

.cardioList {
    display: grid;
    gap: 10px
}

.cardioItem {
    display: grid;
    grid-template-columns: 38px 1fr auto;
    gap: 12px;
    align-items: start;
    padding: 14px;
    border: 1px solid var(--cardio-line);
    background: #fff
}

.orderControls {
    display: grid;
    gap: 5px
}

.iconButton {
    width: 30px;
    height: 30px;
    border: 1px solid var(--cardio-line);
    border-radius: 4px;
    background: #eef5f0;
    color: var(--cardio-green);
    cursor: pointer
}

.iconButton:disabled {
    opacity: .35;
    cursor: not-allowed
}

.cardioItem h3 {
    margin: 0;
    color: var(--cardio-dark);
    font-size: 1rem
}

.itemMeta {
    margin-top: 5px;
    color: var(--cardio-muted);
    font-size: .8rem;
    line-height: 1.45
}

.itemActions {
    display: flex;
    gap: 5px
}

.planEmpty {
    padding: 18px;
    color: var(--cardio-muted);
    font-size: .88rem;
    line-height: 1.5
}

.transitionRestField {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 10px;
    padding: 6px 9px;
    border: 1px solid var(--cardio-line);
    border-radius: 6px;
    background: #f4f8f5;
    color: var(--cardio-dark);
    font-size: .76rem;
    font-weight: 700;
}

.transitionRestField::before {
    color: var(--cardio-gold);
    content: "Rest";
    font-size: .92rem;
}

.transitionRestInput {
    width: 58px;
    min-height: 30px;
    padding: 0 8px;
    border: 1px solid #abc5b9;
    border-radius: 5px;
    background: #fff;
    color: var(--cardio-dark);
    font: inherit;
    font-variant-numeric: tabular-nums;
    text-align: center;
}

.transitionRestInput:focus {
    border-color: var(--cardio-green);
    box-shadow: 0 0 0 3px rgba(31, 107, 91, .12);
    outline: none;
}

.timerPanel {
    margin-top: 20px
}

.timerDisplay {
    padding: 24px;
    text-align: center;
    border: 1px solid var(--cardio-line);
    background: #fff
}

.timerPhase {
    color: var(--cardio-green);
    font-size: .85rem;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase
}

.timerName {
    margin: 8px 0;
    color: var(--cardio-dark);
    font-size: 1.35rem;
    font-weight: 700
}

.timerClock {
    font-variant-numeric: tabular-nums;
    color: var(--cardio-ink);
    font-size: clamp(2.8rem, 7vw, 5.2rem);
    font-weight: 700;
    line-height: 1
}

.timerProgress {
    height: 7px;
    margin: 18px auto 0;
    max-width: 500px;
    overflow: hidden;
    border-radius: 99px;
    background: #e8efeb
}

.timerProgress span {
    display: block;
    height: 100%;
    width: 0;
    background: var(--cardio-gold);
    transition: width 300ms linear
}

.timerNext {
    margin-top: 12px;
    color: var(--cardio-muted);
    font-size: .84rem
}

.timerMessage {
    min-height: 21px;
    margin-top: 12px;
    color: var(--cardio-muted);
    font-size: .82rem
}

.timerActions {
    justify-content: center;
    margin-top: 18px
}

.savedPlanList {
    display: grid;
    gap: 8px
}

.savedPlan {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    padding: 10px;
    border-left: 3px solid var(--cardio-gold);
    background: #fff
}

.savedPlan strong {
    color: var(--cardio-dark);
    font-size: .86rem
}

.savedPlan small {
    display: block;
    margin-top: 3px;
    color: var(--cardio-muted);
    font-size: .73rem
}

.hidden {
    display: none !important
}

@media(max-width:900px) {
    .cardioLayout {
        grid-template-columns: 1fr
    }
}

@media(max-width:600px) {
    .cardioPage {
        padding: 22px 14px 42px
    }

    .roundGrid {
        grid-template-columns: 1fr
    }

    .cardioItem {
        grid-template-columns: 34px 1fr
    }

    .itemActions {
        grid-column: 2
    }

    .timerDisplay {
        padding: 20px 12px
    }
}