* {
    box-sizing: border-box;
}

:root {
    --bg: #07111f;
    --card: #0d1b2d;
    --card-light: #12243a;
    --border: rgba(255, 255, 255, 0.08);
    --text: #f4f7fb;
    --muted: #8fa3ba;
    --primary: #16c784;
    --primary-dark: #0ea86d;
    --blue: #38a3ff;
    --warning: #f5b942;
    --danger: #ff5c6c;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    background:
        radial-gradient(circle at top, #102846 0%, var(--bg) 48%),
        var(--bg);
    color: var(--text);
}

.page {
    width: min(1100px, calc(100% - 32px));
    margin: 0 auto;
    padding: 48px 0;
}

.header {
    text-align: center;
    margin-bottom: 34px;
}

.badge {
    display: inline-block;
    padding: 7px 12px;
    border: 1px solid rgba(22, 199, 132, 0.3);
    border-radius: 999px;
    color: var(--primary);
    background: rgba(22, 199, 132, 0.08);
    font-size: 12px;
    font-weight: bold;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.header h1 {
    margin: 18px 0 10px;
    font-size: clamp(32px, 5vw, 52px);
}

.header p {
    max-width: 650px;
    margin: 0 auto;
    color: var(--muted);
    line-height: 1.6;
}

.panel {
    background: rgba(13, 27, 45, 0.92);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 28px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

.start-area {
    text-align: center;
    padding: 18px 0 8px;
}

.start-button {
    border: 0;
    border-radius: 16px;
    padding: 17px 28px;
    min-width: 250px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #ffffff;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 12px 30px rgba(22, 199, 132, 0.24);
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.start-button:hover {
    transform: translateY(-2px);
}

.start-button:disabled {
    cursor: not-allowed;
    opacity: 0.65;
    transform: none;
}

.status {
    min-height: 24px;
    margin-top: 16px;
    color: var(--muted);
}

.progress {
    width: 100%;
    height: 10px;
    margin-top: 24px;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.07);
}

.progress-bar {
    width: 0%;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--blue), var(--primary));
    transition: width 0.3s ease;
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 24px;
}

.metric {
    min-height: 138px;
    padding: 20px;
    border-radius: 18px;
    background: var(--card-light);
    border: 1px solid var(--border);
}

.metric-label {
    color: var(--muted);
    font-size: 13px;
}

.metric-value {
    margin-top: 18px;
    font-size: 30px;
    font-weight: bold;
}

.metric-unit {
    margin-left: 4px;
    color: var(--muted);
    font-size: 14px;
}

.info-row {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    margin-top: 18px;
    padding: 18px 20px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.035);
    color: var(--muted);
}

.info-row strong {
    color: var(--text);
    word-break: break-all;
}

.result {
    display: none;
    margin-top: 22px;
    padding: 22px;
    border-radius: 18px;
    border: 1px solid var(--border);
    background: rgba(22, 199, 132, 0.08);
}

.result.show {
    display: block;
}

.result h2 {
    margin: 0 0 8px;
    font-size: 22px;
}

.result p {
    margin: 0;
    color: var(--muted);
    line-height: 1.6;
}

.footer {
    margin-top: 24px;
    text-align: center;
    color: var(--muted);
    font-size: 13px;
}

@media (max-width: 800px) {
    .grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 520px) {
    .page {
        width: min(100% - 20px, 1100px);
        padding: 24px 0;
    }

    .panel {
        padding: 18px;
        border-radius: 18px;
    }

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

    .metric {
        min-height: 120px;
        padding: 16px;
    }

    .metric-value {
        font-size: 24px;
    }

    .info-row {
        flex-direction: column;
        gap: 6px;
    }

    .start-button {
        width: 100%;
        min-width: 0;
    }
}

/* Organização dos resultados */

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
    margin-top: 28px;
}

.speed-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-top: 14px;
}

.quality-grid {
    display: grid;
    grid-template-columns: 1fr;
    margin-top: 14px;
}

.speed-metric {
    min-height: 145px;
}

.speed-value {
    font-size: 36px;
}

.quality-metric {
    min-height: 110px;
}

.quality-value {
    font-size: 34px;
}

@media (max-width: 800px) {
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 520px) {
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .speed-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .speed-value {
        font-size: 28px;
    }

    .quality-value {
        font-size: 30px;
    }
}

/* Refinamento das dimensões dos resultados */

.speed-metric {
    min-height: 115px;
}

.quality-metric {
    min-height: 85px;
}

.speed-value {
    margin-top: 8px;
}

.quality-value {
    margin-top: 6px;
}


/* Compactação vertical da página */

.page {
    padding-top: 24px;
    padding-bottom: 18px;
}

.header {
    margin-bottom: 22px;
}

.header h1 {
    margin-top: 14px;
}

.panel {
    padding-top: 20px;
    padding-bottom: 20px;
}

.start-area {
    padding-top: 10px;
    padding-bottom: 4px;
}


/* Compartilhamento do diagnóstico */

.share-area {
    display: none;
    margin-top: 14px;
    text-align: center;
}

.share-area.show {
    display: block;
}

.share-button {
    border: 1px solid rgba(22, 199, 132, 0.45);
    border-radius: 14px;
    padding: 13px 22px;
    background: rgba(22, 199, 132, 0.10);
    color: var(--primary);
    font: inherit;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition:
        background 0.2s ease,
        border-color 0.2s ease,
        transform 0.2s ease;
}

.share-button:hover {
    background: rgba(22, 199, 132, 0.18);
    border-color: var(--primary);
    transform: translateY(-1px);
}

.share-feedback {
    display: block;
    min-height: 18px;
    margin-top: 7px;
    color: var(--muted);
    font-size: 12px;
}

/* Compactação da área de compartilhamento */

.share-area {
    margin-top: 8px;
}

.share-feedback:empty {
    display: none;
}

.share-feedback:not(:empty) {
    display: block;
    min-height: 0;
    margin-top: 5px;
}


/* Padronização da altura dos cartões de medição */

.metrics-grid .metric,
.speed-grid .metric {
    min-height: 110px;
}


/* Carimbo da qualidade da conexão */

.start-area {
    position: relative;
}

.quality-stamp {
    position: absolute;
    top: 0;
    right: 34px;

    width: 118px;
    height: 118px;

    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;

    border: 4px double currentColor;
    border-radius: 50%;

    color: var(--primary);
    text-align: center;
    text-transform: uppercase;

    transform: rotate(-9deg);

    opacity: 0.88;

    box-shadow:
        inset 0 0 0 3px rgba(22, 199, 132, 0.08);
}

.quality-stamp.show {
    display: flex;
}

.quality-stamp::before,
.quality-stamp::after {
    content: "";
    position: absolute;
    left: 13px;
    right: 13px;
    height: 2px;
    background: currentColor;
    opacity: 0.8;
}

.quality-stamp::before {
    top: 38px;
}

.quality-stamp::after {
    bottom: 37px;
}

.stamp-top {
    margin-bottom: 10px;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.16em;
}

.quality-stamp strong {
    max-width: 105px;
    font-size: 17px;
    line-height: 1;
    letter-spacing: 0.03em;
}

/* No celular o carimbo fica menor para não cobrir o botão */

@media (max-width: 700px) {
    .quality-stamp {
        top: 2px;
        right: 4px;
        width: 82px;
        height: 82px;
        border-width: 3px;
    }

    .quality-stamp::before {
        top: 27px;
    }

    .quality-stamp::after {
        bottom: 26px;
    }

    .stamp-top {
        margin-bottom: 7px;
        font-size: 7px;
    }

    .quality-stamp strong {
        max-width: 72px;
        font-size: 11px;
    }
}

/* Cores do carimbo conforme o diagnóstico */

.quality-stamp.stamp-excellent,
.quality-stamp.stamp-good {
    color: #16c784;
}

.quality-stamp.stamp-regular {
    color: #f5b942;
}

.quality-stamp.stamp-unstable,
.quality-stamp.stamp-critical {
    color: #ef5b5b;
}

/* Inclinação do carimbo para a direita */

.quality-stamp {
    transform: rotate(9deg);
}


/* Refinamento do espaçamento superior com o carimbo */

.start-area {
    padding-top: 4px;
}

.quality-stamp {
    top: -8px;
}

.status {
    margin-top: 10px;
}

.progress {
    margin-top: 16px;
}


/* Desfaz compactação superior anterior */

.start-area {
    padding-top: 10px;
}

.quality-stamp {
    top: 0;
}

.status {
    margin-top: 16px;
}

.progress {
    margin-top: 24px;
}


/* Melhor espaçamento interno do carimbo */

.quality-stamp::before {
    top: 32px;
}

.quality-stamp::after {
    bottom: 30px;
}

.stamp-top {
    margin-bottom: 14px;
}

.quality-stamp strong {
    line-height: 1.15;
}

/* Refinamento final do carimbo */

.quality-stamp {
    top: -2px;
}

.quality-stamp::before {
    top: 29px;
}

.quality-stamp::after {
    bottom: 27px;
}

.stamp-top {
    margin-bottom: 17px;
}

.quality-stamp strong {
    font-size: 16px;
    line-height: 1.1;
}

/* Pequeno respiro entre o carimbo e a barra */

.progress {
    margin-top: 28px;
}


/* Aproxima os textos do carimbo */

.stamp-top {
    margin-bottom: 8px;
}


/* Posição do carimbo no mobile */

@media (max-width: 700px) {
    .start-area {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .start-button {
        order: 1;
    }

    .status {
        order: 2;
    }

    .quality-stamp {
        position: relative;
        order: 3;

        top: auto;
        right: auto;

        width: 82px;
        height: 82px;

        margin-top: 8px;
        margin-bottom: 10px;

        flex-shrink: 0;
    }

    .progress {
        order: 4;
        margin-top: 0;
    }
}

/* Ajuste interno do carimbo no mobile */

@media (max-width: 700px) {

    .quality-stamp::before {
        top: 27px;
    }

    .quality-stamp::after {
        bottom: 18px;
    }

    .stamp-top {
        margin-bottom: 7px;
    }

    .quality-stamp strong {
        font-size: 13px;
        line-height: 1;
    }
}

/* Sobe somente o traço superior do carimbo no mobile */

@media (max-width: 700px) {
    .quality-stamp::before {
        top: 22px;
    }
}

/* Ajuste fino do traço superior no mobile */

@media (max-width: 700px) {
    .quality-stamp::before {
        top: 19px;
    }
}


/* Aparência mais real de carimbo */

.quality-stamp {
    opacity: 0.72;
}


/* Efeito visual de carimbo */

.quality-stamp {
    opacity: 0.62;
    filter: contrast(1.15);
}