/* =========================================================
   RHYTHM O₂ — Tactical / Professional UI
   Clean. Controlled. Operational.
   SINGLE SOURCE OF TRUTH (no duplicate blocks)
========================================================= */

* {
    box-sizing: border-box;
}

:root {
    --bg: #000;
    --fg: #fff;

    --muted: rgba(255, 255, 255, .62);
    --muted2: rgba(255, 255, 255, .42);

    --panel: rgba(255, 255, 255, .02);
    --panel2: rgba(255, 255, 255, .035);

    --border: rgba(255, 255, 255, .16);
    --border2: rgba(255, 255, 255, .26);

    --ring-bg: rgba(255, 255, 255, .10);
    --ring: #4da3ff;

    --radius: 14px;
    --radius2: 10px;

    --danger: #c82828;
    --dangerBorder: rgba(255, 140, 140, .9);
    --dangerHover: #f03c3c;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

a {
    color: inherit;
    text-decoration: none;
}

.wrap {
    min-height: 100%;
    display: grid;
    place-items: center;
    padding: 24px;
}

/* =========================================================
   CARD / TYPOGRAPHY
========================================================= */

.card {
    width: min(560px, 100%);
    text-align: center;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 18px;
    background: var(--panel);
}

.brand {
    font-size: .78rem;
    letter-spacing: 4px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 10px;
}

h1 {
    margin: 0 0 8px 0;
    font-size: 1.38rem;
    font-weight: 900;
    letter-spacing: 1.2px;
    text-transform: uppercase;
}

.sub {
    margin: 0 0 16px 0;
    color: var(--muted);
    line-height: 1.45;
    font-size: .95rem;
}

.small {
    margin-top: 16px;
    color: var(--muted);
    font-size: .88rem;
}

.note {
    margin: 12px 0 14px;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius2);
    background: var(--panel2);
    text-align: left;
    font-size: .92rem;
    line-height: 1.35;
    color: rgba(255, 255, 255, .82);
}

.note strong {
    color: #fff;
}

.divider {
    height: 1px;
    background: rgba(255, 255, 255, .12);
    margin: 14px 0;
}

/* =========================================================
   MENU BUTTONS
========================================================= */

.btn {
    display: block;
    padding: 15px 16px;
    margin: 10px 0;
    border: 1px solid var(--border);
    border-radius: var(--radius2);
    background: rgba(255, 255, 255, .02);
    text-align: center;
    font-weight: 950;
    letter-spacing: 1.3px;
    text-transform: uppercase;
    transition: background 120ms ease, border-color 120ms ease, transform 60ms ease;
}

.btn:hover {
    background: rgba(255, 255, 255, .065);
    border-color: var(--border2);
}

.btn:active {
    transform: scale(.995);
}

.btn .sub {
    display: block;
    margin: 6px 0 0 0;
    font-size: .86em;
    font-weight: 650;
    text-transform: none;
    letter-spacing: 0;
    opacity: .78;
}

/* =========================================================
   NAV PILLS
========================================================= */

.navrow {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 10px;
    flex-wrap: wrap;
}

.pill {
    border: 1px solid var(--border);
    padding: 9px 12px;
    border-radius: 8px;
    font-size: .82rem;
    font-weight: 800;
    letter-spacing: .9px;
    text-transform: uppercase;
    color: var(--muted);
    background: rgba(255, 255, 255, .02);
    transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
}

.pill:hover {
    background: rgba(255, 255, 255, .06);
    border-color: var(--border2);
    color: #fff;
}

/* =========================================================
   PROTOCOL LAYOUT
========================================================= */

.protocol {
    display: grid;
    gap: 14px;
    justify-items: center;
}

/* ===== RING: RESPONSIVE + NO COLLAPSE =====
   The old bug was: height:auto + absolute svg = container collapses.
   This fixes it using aspect-ratio and full-size svg.
*/
.ringbox {
    position: relative;
    width: min(280px, 85vw);
    aspect-ratio: 1 / 1;
    /* reserves height ALWAYS */
    margin: 6px auto 10px;
}

svg.progressRing {
    width: 100%;
    height: 100%;
    display: block;
    transform: rotate(-90deg);
    pointer-events: none;
}

/* Ring strokes */
.progress-bg {
    fill: none;
    stroke: var(--ring-bg);
    stroke-width: 8;
}

.progress {
    fill: none;
    stroke: var(--ring);
    stroke-width: 8;
    stroke-linecap: round;
    /* Your JS can override dasharray/dashoffset; these are safe defaults */
    stroke-dasharray: 628;
    stroke-dashoffset: 628;
    transition: stroke-dashoffset .25s linear;
}

/* Center disc */
.pacer {
    position: absolute;
    inset: 10%;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, .22);
    background: rgba(255, 255, 255, .01);
    display: grid;
    place-items: center;
}

.center {
    display: grid;
    place-items: center;
    gap: 10px;
    padding: 10px;
    width: 100%;
    max-width: 360px;
}

/* Labels */
.phaseLabel {
    font-size: .78rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, .78);
}

.count {
    font-size: 2.15rem;
    font-weight: 1000;
    letter-spacing: 1px;
    line-height: 1;
}

.timer {
    font-size: .9rem;
    color: var(--muted);
    letter-spacing: 1px;
}

/* PROMPTS (below ring, not inside) */
.prompt {
    margin: 8px auto 0;
    padding: 0 14px;
    max-width: 360px;
    font-size: clamp(1.05rem, 3.2vw, 1.35rem);
    line-height: 1.15;
    font-weight: 950;
    letter-spacing: 1px;
    text-transform: uppercase;
    text-align: center;
    white-space: normal;
    overflow-wrap: anywhere;
}

.promptSub {
    margin-top: 8px;
    padding: 0 14px;
    max-width: 360px;
    font-size: clamp(.95rem, 2.8vw, 1.05rem);
    line-height: 1.25;
    color: rgba(255, 255, 255, .82);
    text-align: center;
}

/* Phase dots */
.phaseDots {
    display: flex;
    gap: 8px;
    justify-content: center;
    align-items: center;
    min-height: 18px;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, .28);
    background: rgba(255, 255, 255, .06);
    transition: transform 150ms ease, background 150ms ease, border-color 150ms ease;
}

.dot.filled {
    background: rgba(255, 255, 255, .92);
    border-color: rgba(255, 255, 255, .92);
    transform: scale(1.12);
}

/* =========================================================
   START / STOP BUTTON
   - START = round
   - STOP = red + square
   Works if your button is: <button id="startBtn" class="start">START</button>
========================================================= */

.start {
    width: 140px;
    height: 140px;
    border-radius: 999px;
    border: 2px solid rgba(255, 255, 255, .26);
    background: rgba(255, 255, 255, .03);
    color: #fff;
    font-weight: 950;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    display: grid;
    place-items: center;
    transition: transform 120ms ease, background 120ms ease, border-color 120ms ease;
}

.start:hover {
    background: rgba(255, 255, 255, .06);
    border-color: rgba(255, 255, 255, .42);
}

.start:active {
    transform: scale(.985);
}

.start:disabled {
    opacity: .45;
    cursor: default;
}

/* STOP state: red + square */
.start.stop,
#startBtn.stop {
    border-radius: 10px;
    /* square-ish but still clean */
    background: rgba(200, 40, 40, .92);
    border-color: var(--dangerBorder);
    letter-spacing: 1.6px;
}

.start.stop:hover,
#startBtn.stop:hover {
    background: var(--dangerHover);
}

/* =========================================================
   TOGGLES + FEEDBACK
========================================================= */

.toggleRow {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 14px;
    /* give space so it never collides with ring */
    padding-top: 4px;
}

.toggle {
    border: 1px solid var(--border);
    padding: 10px 12px;
    border-radius: 999px;
    font-size: .85rem;
    font-weight: 850;
    letter-spacing: .9px;
    text-transform: uppercase;
    color: var(--muted);
    background: rgba(255, 255, 255, .02);
    cursor: pointer;
    transition: background 120ms ease, border-color 120ms ease, color 120ms ease;
}

.toggle:hover {
    background: rgba(255, 255, 255, .06);
    border-color: var(--border2);
    color: #fff;
}

.toggle:disabled {
    opacity: .5;
    cursor: not-allowed;
}

.feedback {
    margin-top: 18px;
    text-align: center;
}

.feedback-link {
    color: var(--muted);
    text-decoration: underline;
    text-underline-offset: 4px;
    font-size: .85rem;
    font-weight: 800;
    letter-spacing: .2px;
}

.feedback-link:hover {
    color: #fff;
}

/* =========================================================
   ACCESSIBILITY
========================================================= */

.toggle:focus-visible,
.start:focus-visible,
.btn:focus-visible,
a:focus-visible {
    outline: 2px solid rgba(255, 255, 255, .45);
    outline-offset: 3px;
}

/* =========================================================
   MOBILE
========================================================= */

@media (max-width: 480px) {
    .wrap {
        padding: 16px;
    }

    .card {
        padding: 18px 12px;
    }

    h1 {
        font-size: 1.2rem;
    }

    .sub {
        font-size: .9rem;
    }

    .ringbox {
        width: min(300px, 88vw);
        margin: 10px auto 12px;
    }

    .start {
        width: 132px;
        height: 132px;
    }

    .toggle {
        padding: 9px 12px;
        font-size: .82rem;
    }
}

@media (max-width: 420px) {
    .prompt {
        font-size: 1.02rem;
        max-width: 320px;
    }
}