html, body {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Greens */
    --brand-green-dark: #234d20;
    --brand-green: #388e3c;
    --brand-green-light: #aed581;
    --brand-green-bg: #e8f5e9;
    --brand-green-sheet: #c8e6c9;
    --brand-green-shadow: #b2dfdb;

    /* Yellows */
    --brand-yellow: #fff176;
    --brand-yellow-light: #ffe082;

    /* Blues */
    --brand-blue: #039be5;
    --brand-blue-light: #4fc3f7;
    --brand-blue-bg: #e3f2fd;
    --brand-blue-sheet: #b3e5fc;
    --brand-blue-shadow: #b3e5fc;

    /* Browns (for brown noise) */
    --brand-brown-bg: #efebe9;
    --brand-brown-sheet: #bcaaa4;
    --brand-brown-shadow: #bcaaa4;

    /* Misc */
    --brand-white: #fff;
    --brand-modal-bg: #f1f8e9;
}

.freq {
    width: 100px;
}
.vol {
    width: 80px;
}

body {
    position: relative;
    min-height: 100vh;
    background: #000 !important;
    color: var(--brand-green-dark);
    font-family: 'Segoe UI', 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 1;
}

h1 {
    text-align: center;
    margin-top: 40px;
    margin-bottom: 30px;
    font-size: 2.5em;
    letter-spacing: 2px;
    color: var(--brand-green);
    text-shadow: 0 2px 12px var(--brand-green-shadow);
}

h4, h5 {
    margin-top: 40px;
    margin-bottom: 10px;
    color: #558b2f;
    letter-spacing: 1px;
}

label, .freq, .vol, input[type="number"], input[type="range"] {
    font-size: 1.1em;
    margin-bottom: 12px;
}

input[type="number"], input[type="range"] {
    border-radius: 8px;
    border: 1px solid var(--brand-green-light);
    padding: 8px 12px;
    margin: 0 8px 12px 0;
    background: var(--brand-modal-bg);
    color: var(--brand-green-dark);
    transition: border 0.2s;
}

input[type="number"]:focus, input[type="range"]:focus {
    border: 1.5px solid var(--brand-green);
    outline: none;
}

button {
    background: linear-gradient(90deg, var(--brand-green-light) 0%, var(--brand-yellow) 100%);
    color: var(--brand-green-dark);
    border: none;
    border-radius: 8px;
    padding: 10px 22px;
    margin: 8px 6px 18px 0;
    font-size: 1.1em;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 2px 8px var(--brand-green-sheet);
    transition: background 0.2s, box-shadow 0.2s;
}

button:hover, button:focus {
    background: linear-gradient(90deg, var(--brand-green-light) 0%, var(--brand-yellow-light) 100%);
    box-shadow: 0 4px 16px var(--brand-green-shadow);
}

#pvRainVolume {
    accent-color: var(--brand-blue);
    width: 180px;
    margin-left: 10px;
    margin-bottom: 18px;
}

#pvRainConfigPanel {
    background: rgba(33, 150, 243, 0.08);
    border-radius: 16px;
    padding: 24px 32px;
    margin: 32px auto 0 auto;
    max-width: 350px;
    box-shadow: 0 2px 16px var(--brand-blue-shadow);
    border: 1.5px solid var(--brand-blue-sheet);
}

#pvRainConfigPanel label {
    color: #1976d2;
    font-weight: 500;
    display: block;
    margin-bottom: 8px;
}

canvas[id^="meter_"] {
    display: none;
    background: var(--brand-blue-bg);
    border-radius: 6px;
    margin-left: 10px;
    margin-bottom: 8px;
    border: 1px solid var(--brand-blue-sheet);
    box-shadow: 0 1px 4px var(--brand-blue-shadow);
}

#sample_status_ {
    color: var(--brand-green);
    font-weight: 600;
    margin-left: 10px;
}

ul, li {
    margin-left: 0;
    padding-left: 0;
    list-style: none;
}

.section-sheet {
    background: linear-gradient(120deg, var(--brand-green-bg) 80%, var(--brand-green-sheet) 100%);
    border-radius: 24px;
    box-shadow:
        0 0 48px 12px rgba(80,255,255,0.28),
        0 0 24px 8px rgba(255,255,255,0.18),
        0 0 2px 2px rgba(80,255,255,0.10);
    padding: 0;
    margin: 36px auto 36px auto;
    max-width: 540px;
    min-width: 260px;
    width: 90vw;
    display: block;
    border: 2px solid rgba(80,255,255,0.13);
    position: relative;
}

.sheet-titlebar {
    position: relative;
    background: linear-gradient(90deg, var(--brand-blue-light) 0%, var(--brand-green-light) 100%);
    border-top-left-radius: 20px;
    border-top-right-radius: 20px;
    padding: 0.7em 1.5em;
    margin: 0 0 24px;
    display: flex;
    align-items: center;
    min-height: 44px;
    box-shadow: 0 2px 12px 0 rgba(0,0,0,0.08);
    width: auto;
}

.sheet-titlebar h4 {
    margin: 0;
    font-size: 1.25em;
    font-weight: 700;
    color: var(--brand-green-dark);
    letter-spacing: 1px;
    flex: 1 1 auto;
}

.info-btn {
    position: absolute;
    right: 22px;
    top: 50%;
    transform: translateY(-50%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-yellow);
    color: var(--brand-green-dark);
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    font-size: 1.3em;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 2px 8px var(--brand-green-shadow);
    transition: background 0.2s;
    padding: 0;
    line-height: 1;
    z-index: 2;
    top: 21px;
}

.section-sheet h4 {
    margin: 0;
    font-size: 1.25em;
    font-weight: 700;
    color: var(--brand-green-dark);
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.brown-sheet {
    background: linear-gradient(120deg, var(--brand-brown-bg) 80%, var(--brand-brown-sheet) 100%);
    box-shadow:
        0 0 48px 12px rgba(255, 220, 180, 0.22), /* brighter warm glow */
        0 0 24px 8px rgba(255,255,255,0.14),
        0 0 2px 2px rgba(255,220,180,0.10);
    border: 2px solid rgba(255,220,180,0.13);
}

.blue-sheet {
    background: linear-gradient(120deg, var(--brand-blue-bg) 80%, var(--brand-blue-sheet) 100%);
    box-shadow:
        0 0 56px 16px rgba(80,180,255,0.33), /* brighter blue glow */
        0 0 24px 8px rgba(255,255,255,0.16),
        0 0 2px 2px rgba(80,180,255,0.10);
    border: 2px solid rgba(80,180,255,0.15);
}

.blue-sheet button {
    background: linear-gradient(90deg, var(--brand-blue-light) 0%, var(--brand-yellow) 100%);
    color: var(--brand-green-dark);
}

.info-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-yellow);
    color: var(--brand-green-dark);
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    font-size: 1.3em;
    font-weight: bold;
    cursor: pointer;
    margin-left: 12px;
    box-shadow: 0 2px 8px var(--brand-green-shadow);
    transition: background 0.2s;
    padding: 0;
    line-height: 1;
}
.info-btn:hover {
    background: var(--brand-yellow-light);
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0; top: 0;
    width: 100vw; height: 100vh;
    overflow: auto;
    background: rgba(0,0,0,0.35);
}
.modal-content {
    background: var(--brand-modal-bg);
    margin: 8vh auto;
    padding: 32px 24px;
    border-radius: 18px;
    max-width: 420px;
    box-shadow: 0 8px 32px var(--brand-green-shadow);
    position: relative;
}
.close {
    color: #888;
    position: absolute;
    top: 12px; right: 18px;
    font-size: 2em;
    font-weight: bold;
    cursor: pointer;
}
.close:hover { color: var(--brand-green); }



.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  border: 0;
}
.logo-img {
  max-width: 220px;
  height: auto;
  display: block;
  margin: 0 auto -49px auto;
    z-index: 1;
    position: relative;
}
.logo-link {
  display: inline-block;
}

.sheet-content {
    padding: 0 32px 28px 32px;
}

@media (max-width: 600px) {
    body {
        padding: 0;
    }
    .section-sheet {
        padding: 0;
        margin: 18px auto;
        max-width: 98vw;
        min-width: 0;
        width: 100%;
        box-sizing: border-box;
    }
    .sheet-titlebar {
        padding: 0.7em 8px;
        margin: 0 0 24px 0; /* No negative margin! */
        width: 100%;
        box-sizing: border-box;
        border-top-left-radius: 20px;
        border-top-right-radius: 20px;
    }
    .sheet-content {
        padding: 0 8px 16px 8px;
    }
}
@media (max-width: 700px) {
    .section-sheet {
        padding: 0;
        margin: 18px auto;
        max-width: 98vw;
    }
    .sheet-content {
        padding: 18px 6vw 16px 6vw;
    }
    .info-btn {
        top: 14px;
    }
}

.binaural-row {
    display: flex;
    gap: 24px;
    margin-bottom: 12px;
    justify-content: center;
}
.binaural-freq {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}
.binaural-freq label {
    font-size: 1em;
    color: var(--brand-green-dark);
    margin-bottom: 4px;
}
.binaural-details {
    text-align: center;
    margin-bottom: 12px;
}
.binaural-controls {
    display: flex;
    align-items: center;
    gap: 18px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 4px;
}

.thunder-samples {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-bottom: 8px;
}
.thunder-sample-row {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    padding: 4px 0;
}
.sample-name {
    min-width: 90px;
    font-weight: 500;
    color: var(--brand-green-dark);
}

.noise-row, .pvrain-row {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
    margin-bottom: 8px;
}



/* binaural types template */

.binaural-types-list {
    display: flex;
    flex-direction: column;
    gap: 22px;
    margin: 18px 0;
    max-width: 600px;
    margin: 18px auto;
    width: 100%;
}

.binaural-type {
    background: linear-gradient(100deg, var(--brand-blue-bg) 80%, var(--brand-green-bg) 100%);
    border-radius: 14px;
    box-shadow: 0 2px 12px 0 rgba(80,255,255,0.08);
    padding: 18px 18px 10px 18px;
    border: 1.5px solid var(--brand-blue-shadow);
}

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

.binaural-type-title {
    font-size: 1.15em;
    font-weight: 700;
    color: var(--brand-blue);
    letter-spacing: 1px;
}

.binaural-type-title small {
    font-size: 0.95em;
    color: var(--brand-green-dark);
    margin-left: 6px;
}

.binaural-play-btn {
    background: var(--brand-yellow);
    color: var(--brand-green-dark);
    border: none;
    border-radius: 18px;
    font-size: 1em;
    font-weight: bold;
    padding: 4px 16px;
    cursor: pointer;
    box-shadow: 0 2px 8px var(--brand-green-shadow);
    transition: background 0.2s;
}
.binaural-play-btn:hover {
    background: var(--brand-yellow-light);
}
.binaural-play-btn.active {
    background: var(--brand-green);
    color: #fff;
}

.binaural-type ul {
    margin: 0 0 0 18px;
    padding: 0;
    color: var(--brand-green-dark);
}

.binaural-type-source {
    text-align: right;
    font-size: 0.95em;
    margin-top: 18px;
}

/* end of binaural types template */



/* start of footer styles */

.site-footer {
    text-align: center;
    color: var(--brand-green-dark);
    background: rgba(255,255,255,0.7);
    font-size: 0.98em;
    padding: 18px 8px 12px 8px;
    margin-top: 36px;
    width: 100%;
}
.site-footer a {
    color: var(--brand-blue);
    text-decoration: underline;
}
.site-footer a:hover {
    color: var(--brand-green);
}

/* end of footer styles */



/* start of stars */

#starfield {
    position: fixed;
    top: 0; left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0; /* stays at the very back */
    pointer-events: none;
    display: block;
}

.floating-stars-btn {
    position: fixed;
    top: 18px;
    right: 18px;
    z-index: 2000;
    background: var(--brand-blue-light, #4fc3f7);
    color: var(--brand-green-dark, #234d20);
    border: none;
    border-radius: 50px;
    padding: 10px 18px;
    font-size: 1.1em;
    font-weight: bold;
    box-shadow: 0 2px 8px rgba(0,0,0,0.13);
    cursor: pointer;
    transition: background 0.2s;
}
.floating-stars-btn:hover {
    background: var(--brand-yellow, #fff176);
}

/* end of stars */