/* ================================================================
   Netprofessor Speedtest  -  CSS
   Dark theme - Glassmorphism - Gradient accents - Inter font
   ================================================================ */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg: #0a0e1a;
    --bg-card: rgba(255, 255, 255, .04);
    --bg-glass: rgba(255, 255, 255, .06);
    --border: rgba(255, 255, 255, .08);
    --text: #e2e8f0;
    --text-dim: #94a3b8;
    --accent-1: #6366f1;
    --accent-2: #06b6d4;
    --accent-3: #10b981;
    --accent-up: #f59e0b;
    --accent-ping: #f472b6;
    --accent-jitter: #a78bfa;
    --radius: 16px;
    --radius-sm: 10px;
    --font: 'Inter', system-ui, -apple-system, sans-serif;
    --transition: .3s cubic-bezier(.4, 0, .2, 1);
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    line-height: 1.5;
}

/* --- Animated background gradient blobs ----------------------- */
body::before,
body::after {
    content: '';
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    opacity: .12;
    z-index: 0;
    pointer-events: none;
}

body::before {
    width: 600px;
    height: 600px;
    background: var(--accent-1);
    top: -200px;
    left: -100px;
    animation: blobMove 20s ease-in-out infinite alternate;
}

body::after {
    width: 500px;
    height: 500px;
    background: var(--accent-2);
    bottom: -150px;
    right: -80px;
    animation: blobMove 25s ease-in-out infinite alternate-reverse;
}

@keyframes blobMove {
    0% {
        transform: translate(0, 0) scale(1);
    }

    50% {
        transform: translate(60px, 40px) scale(1.15);
    }

    100% {
        transform: translate(-40px, 60px) scale(.95);
    }
}

/* --- Header --------------------------------------------------- */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    background: rgba(10, 14, 26, .85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

.header__brand {
    display: flex;
    align-items: center;
    gap: .65rem;
}

.header__logo {
    flex-shrink: 0;
}

.header__title {
    font-size: 1.15rem;
    font-weight: 700;
    letter-spacing: -.01em;
    white-space: nowrap;
}

.header__accent {
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header__nav {
    display: flex;
    gap: .5rem;
}

.header__btn {
    background: var(--bg-glass);
    border: 1px solid var(--border);
    color: var(--text-dim);
    border-radius: var(--radius-sm);
    padding: .45rem .6rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.header__btn:hover {
    color: var(--text);
    border-color: var(--accent-2);
    background: rgba(6, 182, 212, .08);
}

/* --- Main ----------------------------------------------------- */
.main {
    position: relative;
    z-index: 1;
    flex: 1;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

/* --- Server Info Bar ------------------------------------------ */
.server-info {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: .75rem;
    margin-bottom: 2.5rem;
    animation: fadeUp .5s ease-out both;
}

.server-info__item {
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: .7rem 1rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition);
    min-width: 0;
}

.server-info__item:hover {
    border-color: var(--accent-2);
    transform: translateY(-1px);
}

.server-info__label {
    display: block;
    font-size: .7rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--text-dim);
    margin-bottom: .2rem;
}

.server-info__value {
    display: block;
    font-size: .85rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* --- Gauge Section -------------------------------------------- */
.gauge-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 2.5rem;
    animation: fadeUp .6s ease-out .1s both;
}

.gauge-container {
    position: relative;
    width: 300px;
    height: 200px;
    margin-bottom: 1.5rem;
}

.gauge-svg {
    width: 100%;
    height: 100%;
}

.gauge-bg {
    fill: none;
    stroke: rgba(255, 255, 255, .1);
    stroke-width: 2;
    stroke-linecap: round;
}

.gauge-value {
    fill: none;
    stroke: url(#gaugeGrad);
    stroke-width: 4;
    stroke-linecap: round;
    transition: stroke-dashoffset .35s cubic-bezier(.4, 0, .2, 1);
    filter: drop-shadow(0 0 10px rgba(6, 182, 212, 0.4));
}

.gauge-tick {
    stroke: rgba(255, 255, 255, 0.15);
    stroke-width: 1;
}

.gauge-tick.major {
    stroke: rgba(255, 255, 255, 0.4);
    stroke-width: 2;
}

#gauge-needle {
    transform-origin: 140px 100px;
    transition: transform 0.1s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}



.gauge-label {
    font-size: 11px;
    font-family: var(--font);
    fill: var(--text-dim);
    font-weight: 600;
}

/* --- Start Button --------------------------------------------- */
.start-btn {
    position: absolute;
    top: 56%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    color: #fff;
    font-family: var(--font);
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: .08em;
    box-shadow: 0 0 30px rgba(99, 102, 241, .3), 0 0 60px rgba(6, 182, 212, .15);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

.start-btn:hover {
    transform: translate(-50%, -50%) scale(1.06);
    box-shadow: 0 0 40px rgba(99, 102, 241, .5), 0 0 80px rgba(6, 182, 212, .25);
}

.start-btn:active {
    transform: translate(-50%, -50%) scale(.97);
}

.start-btn.running {
    cursor: default;
}

/* --- Phase & Reading Container -------------------------------- */
.gauge-reading-container {
    margin-top: -1.5rem;
    text-align: center;
    position: relative;
    z-index: 5;
}

.gauge-reading {
    position: static;
    transform: none;
    margin-bottom: 0.2rem;
}

.gauge-reading__value {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -.03em;
    line-height: 1;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.gauge-phase {
    position: static;
    margin-top: 0;
    font-size: .9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--text-dim);
}

.start-btn__label {
    position: relative;
    z-index: 2;
}

.start-btn__ring {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.start-btn__track {
    fill: none;
    stroke: rgba(255, 255, 255, .15);
    stroke-width: 4;
}

.start-btn__progress {
    fill: none;
    stroke: #fff;
    stroke-width: 4;
    stroke-linecap: round;
    stroke-dasharray: 339.292;
    stroke-dashoffset: 339.292;
    transform: rotate(-90deg);
    transform-origin: center;
    transition: stroke-dashoffset .3s linear;
}

/* --- Result Cards --------------------------------------------- */
.results {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: .85rem;
    margin-bottom: 2.5rem;
    animation: fadeUp .8s ease-out .3s both;
}

.result-card {
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.2rem 1rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.result-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-1), var(--accent-2));
    opacity: 0;
    transition: opacity var(--transition);
}

.result-card.done::before {
    opacity: 1;
}

.result-card:hover {
    border-color: rgba(255, 255, 255, .14);
    transform: translateY(-2px);
}

.result-card__icon {
    width: 40px;
    height: 40px;
    margin: 0 auto .6rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: rgba(99, 102, 241, .12);
    color: var(--accent-1);
}

.result-card__icon--upload {
    background: rgba(245, 158, 11, .12);
    color: var(--accent-up);
}

.result-card__icon--ping {
    background: rgba(244, 114, 182, .12);
    color: var(--accent-ping);
}

.result-card__icon--jitter {
    background: rgba(167, 139, 250, .12);
    color: var(--accent-jitter);
}

.result-card__data {
    margin-bottom: .3rem;
}

.result-card__value {
    font-size: 1.65rem;
    font-weight: 800;
    letter-spacing: -.02em;
    line-height: 1.1;
}

.result-card__unit {
    font-size: .7rem;
    font-weight: 500;
    color: var(--text-dim);
    margin-left: .2rem;
}

.result-card__label {
    font-size: .68rem;
    text-transform: uppercase;
    letter-spacing: .08em;
    color: var(--text-dim);
    font-weight: 600;
}

/* Done-state coloring */
#card-download.done .result-card__value {
    color: var(--accent-2);
}

#card-upload.done .result-card__value {
    color: var(--accent-up);
}

#card-ping.done .result-card__value {
    color: var(--accent-ping);
}

#card-jitter.done .result-card__value {
    color: var(--accent-jitter);
}

/* --- Detailed Results ----------------------------------------- */
.details {
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    margin-bottom: 2rem;
    animation: fadeUp .4s ease-out both;
}

.details__title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.details__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: .6rem;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: .55rem .8rem;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, .03);
    gap: .5rem;
}

.detail-item__label {
    font-size: .78rem;
    color: var(--text-dim);
    white-space: nowrap;
}

.detail-item__value {
    font-size: .88rem;
    font-weight: 700;
    white-space: nowrap;
}

/* --- History -------------------------------------------------- */
.history {
    background: var(--bg-glass);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    margin-bottom: 2rem;
    animation: fadeUp .4s ease-out both;
}

.history__list {
    display: flex;
    flex-direction: column;
    gap: .5rem;
    margin-bottom: 1rem;
}

.history__item {
    display: grid;
    grid-template-columns: 1fr repeat(4, auto);
    gap: .8rem;
    align-items: center;
    padding: .6rem .8rem;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, .03);
    font-size: .8rem;
}

.history__item span:first-child {
    color: var(--text-dim);
    font-size: .72rem;
}

.history__dl {
    color: var(--accent-2);
    font-weight: 700;
}

.history__ul {
    color: var(--accent-up);
    font-weight: 700;
}

.history__pg {
    color: var(--accent-ping);
    font-weight: 700;
}

.history__jt {
    color: var(--accent-jitter);
    font-weight: 700;
}

.history__clear {
    background: rgba(239, 68, 68, .1);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, .2);
    border-radius: var(--radius-sm);
    padding: .45rem 1rem;
    font-family: var(--font);
    font-size: .78rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.history__clear:hover {
    background: rgba(239, 68, 68, .18);
    border-color: rgba(239, 68, 68, .4);
}

.history__empty {
    color: var(--text-dim);
    font-size: .82rem;
    text-align: center;
    padding: 1.5rem 0;
}

/* --- Unit Toggle ----------------------------------------- */
.unit-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

.unit-toggle__label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-dim);
    transition: var(--transition);
}

.unit-toggle:has(#unit-toggle-input:not(:checked)) #unit-label-mbps,
.unit-toggle:has(#unit-toggle-input:checked) #unit-label-mbytes {
    color: var(--text);
    font-weight: 700;
}

.unit-toggle__switch {
    position: relative;
    width: 52px;
    height: 28px;
    display: inline-block;
}

.unit-toggle__switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.unit-toggle__slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    transition: .4s;
    border-radius: 34px;
}

.unit-toggle__slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 3px;
    bottom: 3px;
    background: var(--text-dim);
    transition: .4s;
    border-radius: 50%;
}

input:checked+.unit-toggle__slider {
    background-color: rgba(6, 182, 212, 0.15);
    border-color: var(--accent-2);
}

input:checked+.unit-toggle__slider:before {
    transform: translateX(24px);
    background: var(--accent-2);
}

input:focus+.unit-toggle__slider {
    box-shadow: 0 0 1px var(--accent-2);
}

/* --- Footer --------------------------------------------------- */
.footer {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 1.5rem;
    font-size: .75rem;
    color: var(--text-dim);
    border-top: 1px solid var(--border);
}

.footer strong {
    background: linear-gradient(135deg, var(--accent-1), var(--accent-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer strong a {
    color: inherit;
    text-decoration: none;
}

/* --- Utilities ------------------------------------------------ */
.hidden {
    display: none !important;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }

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

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: .6;
    }
}

.gauge-phase.active {
    animation: pulse 1s ease-in-out infinite;
}

@media (max-width: 900px) {
    .main {
        max-width: 700px;
        padding: 1.5rem 1.25rem 3.5rem;
    }

    .server-info {
        grid-template-columns: repeat(2, 1fr);
    }

    .results {
        grid-template-columns: repeat(4, 1fr);
        gap: .65rem;
    }
}

@media (max-width: 768px) {
    .header {
        padding: .85rem 1.25rem;
    }

    .main {
        padding: 1.25rem 1rem 3rem;
    }

    .gauge-container {
        width: 280px;
        height: 190px;
    }

    .gauge-reading__value {
        font-size: 2.6rem;
    }

    .results {
        grid-template-columns: repeat(2, 1fr);
        gap: .6rem;
    }

    .details__grid {
        grid-template-columns: 1fr;
    }

    .history__item {
        grid-template-columns: 1fr repeat(2, auto);
        gap: .5rem;
    }

    .history__item span:first-child {
        grid-column: 1 / -1;
    }
}

@media (max-width: 480px) {
    .header {
        padding: .7rem .85rem;
    }

    .header__title {
        font-size: .95rem;
    }

    .main {
        padding: 1rem .75rem 2.5rem;
    }

    .server-info {
        grid-template-columns: 1fr 1fr;
        gap: .45rem;
    }

    .server-info__item {
        padding: .55rem .75rem;
    }

    .server-info__value {
        font-size: .78rem;
    }

    .gauge-section {
        margin-bottom: 1.5rem;
    }

    .gauge-container {
        width: min(85vw, 300px);
        height: auto;
        aspect-ratio: 280 / 180;
        margin-bottom: 1rem;
    }

    .gauge-reading-container {
        margin-top: -1rem;
    }

    .gauge-reading__value {
        font-size: 2.4rem;
    }

    .gauge-phase {
        font-size: .72rem;
    }

    .start-btn {
        width: 72px;
        height: 72px;
        font-size: 1rem;
    }

    .results {
        grid-template-columns: 1fr 1fr;
        gap: .5rem;
    }

    .result-card {
        padding: .9rem .65rem;
    }

    .result-card__icon {
        width: 34px;
        height: 34px;
        margin-bottom: .4rem;
    }

    .result-card__value {
        font-size: 1.35rem;
    }

    .result-card__label {
        font-size: .62rem;
    }

    .detail-item {
        flex-direction: column;
        align-items: flex-start;
        gap: .2rem;
        padding: .5rem .7rem;
    }

    .detail-item__value {
        font-size: .82rem;
    }

    .history__item {
        grid-template-columns: 1fr 1fr;
        gap: .35rem;
        font-size: .72rem;
    }
}

@media (max-width: 360px) {
    .server-info {
        grid-template-columns: 1fr;
    }

    .results {
        grid-template-columns: 1fr;
    }

    .gauge-container {
        width: min(90vw, 280px);
    }

    .gauge-reading__value {
        font-size: 2rem;
    }

    .start-btn {
        width: 64px;
        height: 64px;
        font-size: .9rem;
    }
}