* {
    box-sizing: border-box;
}

html {
    min-height: 100%;
    background: #060712;
}

body {
    min-height: 100%;
    margin: 0;
    color: rgba(255, 255, 255, 0.92);
    font-family:
        Inter,
        ui-sans-serif,
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    background:
        radial-gradient(circle at 18% 12%, rgba(109, 92, 255, 0.34), transparent 32rem),
        radial-gradient(circle at 82% 18%, rgba(0, 217, 255, 0.2), transparent 30rem),
        radial-gradient(circle at 50% 90%, rgba(255, 77, 166, 0.16), transparent 34rem),
        linear-gradient(135deg, #050714 0%, #090b18 48%, #03040a 100%);
    overflow-x: hidden;
}

body::before {
    position: fixed;
    inset: 0;
    z-index: -2;
    pointer-events: none;
    content: "";
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
    background-size: 44px 44px;
    mask-image: radial-gradient(circle at center, black, transparent 78%);
}

body::after {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    content: "";
    background:
        linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.05), transparent);
    opacity: 0.45;
}

button,
input {
    font: inherit;
}

button {
    cursor: pointer;
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.45;
}

.particle-page {
    width: min(1540px, 100%);
    min-height: 100dvh;
    margin: 0 auto;
    padding: clamp(16px, 3vw, 34px);
    display: grid;
    grid-template-columns: minmax(320px, 430px) minmax(0, 1fr);
    gap: clamp(16px, 2.5vw, 28px);
    align-items: stretch;
}

.glass-card {
    border: 1px solid rgba(255, 255, 255, 0.14);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.105), rgba(255, 255, 255, 0.052)),
        rgba(11, 14, 28, 0.68);
    border-radius: 32px;
    box-shadow:
        0 24px 80px rgba(0, 0, 0, 0.44),
        inset 0 1px 0 rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}

.intro-card {
    padding: clamp(20px, 3vw, 32px);
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.eyebrow {
    width: fit-content;
    padding: 8px 12px;
    border: 1px solid rgba(118, 204, 255, 0.26);
    border-radius: 999px;
    color: rgba(189, 232, 255, 0.92);
    background: rgba(40, 161, 255, 0.11);
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

h1,
h2,
p {
    margin: 0;
}

h1 {
    max-width: 10ch;
    font-size: clamp(2.2rem, 5vw, 4.9rem);
    line-height: 0.92;
    letter-spacing: -0.08em;
}

h2 {
    font-size: clamp(1.05rem, 2vw, 1.4rem);
    letter-spacing: -0.035em;
}

.intro-copy {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.65;
    font-size: 0.98rem;
}

.upload-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.upload-card {
    position: relative;
    min-height: 156px;
    padding: 14px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 10px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 22px;
    background:
        radial-gradient(circle at top left, rgba(87, 126, 255, 0.16), transparent 14rem),
        rgba(255, 255, 255, 0.055);
    transition:
        transform 180ms ease,
        border-color 180ms ease,
        background 180ms ease;
}

.upload-card:hover {
    transform: translateY(-2px);
    border-color: rgba(139, 213, 255, 0.44);
    background:
        radial-gradient(circle at top left, rgba(87, 126, 255, 0.24), transparent 14rem),
        rgba(255, 255, 255, 0.08);
}

.upload-card input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.upload-label {
    position: relative;
    z-index: 2;
    width: fit-content;
    padding: 7px 10px;
    border-radius: 999px;
    color: rgba(255, 255, 255, 0.9);
    background: rgba(255, 255, 255, 0.12);
    font-size: 0.78rem;
    font-weight: 800;
}

.file-name {
    position: relative;
    z-index: 2;
    color: rgba(255, 255, 255, 0.74);
    font-size: 0.82rem;
    line-height: 1.35;
    word-break: break-word;
}

.preview-image {
    position: absolute;
    inset: auto 10px 10px auto;
    width: 58px;
    height: 58px;
    object-fit: cover;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 16px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.32);
}

.control-stack {
    display: grid;
    gap: 14px;
}

.control-row {
    display: grid;
    gap: 8px;
}

.control-row label {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    color: rgba(255, 255, 255, 0.78);
    font-size: 0.84rem;
    font-weight: 700;
}

.control-row label span {
    color: white;
    font-variant-numeric: tabular-nums;
}

input[type="range"] {
    width: 100%;
    accent-color: #84d7ff;
}

.button-row {
    display: grid;
    grid-template-columns: 1.25fr 1fr 0.85fr;
    gap: 10px;
}

.primary-button,
.ghost-button {
    min-height: 48px;
    padding: 12px 14px;
    border-radius: 16px;
    font-size: 0.9rem;
    font-weight: 850;
    transition:
        transform 160ms ease,
        border-color 160ms ease,
        background 160ms ease,
        box-shadow 160ms ease;
}

.primary-button {
    border: 0;
    color: #06101c;
    background:
        linear-gradient(135deg, #ffffff, #9de4ff 46%, #b79cff);
    box-shadow:
        0 14px 38px rgba(116, 208, 255, 0.26),
        inset 0 1px 0 rgba(255, 255, 255, 0.9);
}

.primary-button:not(:disabled):hover,
.ghost-button:not(:disabled):hover {
    transform: translateY(-2px);
}

.ghost-button {
    border: 1px solid rgba(255, 255, 255, 0.16);
    color: rgba(255, 255, 255, 0.88);
    background: rgba(255, 255, 255, 0.07);
}

.ghost-button:hover {
    border-color: rgba(157, 228, 255, 0.38);
    background: rgba(255, 255, 255, 0.1);
}

.status-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
}

.status-pill {
    min-width: 0;
    max-width: 100%;
    padding: 9px 12px;
    border-radius: 999px;
    color: rgba(255, 255, 255, 0.82);
    background: rgba(255, 255, 255, 0.08);
    font-size: 0.82rem;
    line-height: 1.35;
}

.status-pill[data-tone="good"] {
    color: rgba(206, 255, 225, 0.95);
    background: rgba(26, 201, 113, 0.16);
}

.status-pill[data-tone="bad"] {
    color: rgba(255, 216, 216, 0.96);
    background: rgba(255, 71, 87, 0.16);
}

.status-pill[data-tone="busy"] {
    color: rgba(213, 236, 255, 0.95);
    background: rgba(91, 154, 255, 0.16);
}

.perf-text {
    color: rgba(255, 255, 255, 0.52);
    font-size: 0.78rem;
    font-variant-numeric: tabular-nums;
}

.hint-text {
    color: rgba(255, 255, 255, 0.48);
    font-size: 0.82rem;
    line-height: 1.55;
}

.stage-card {
    min-width: 0;
    padding: clamp(14px, 2vw, 22px);
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.stage-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.stage-header p {
    margin-top: 4px;
    color: rgba(255, 255, 255, 0.56);
    font-size: 0.88rem;
}

.stage-badge {
    flex: 0 0 auto;
    padding: 8px 11px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 999px;
    color: rgba(255, 255, 255, 0.7);
    background: rgba(255, 255, 255, 0.07);
    font-size: 0.76rem;
    font-weight: 800;
}

.canvas-wrap {
    position: relative;
    min-height: calc(100dvh - 145px);
    overflow: hidden;
    isolation: isolate;
    border: 1px solid rgba(255, 255, 255, 0.13);
    border-radius: 26px;
    background:
        radial-gradient(circle at 20% 20%, rgba(67, 108, 255, 0.16), transparent 28rem),
        radial-gradient(circle at 80% 80%, rgba(255, 78, 178, 0.13), transparent 28rem),
        rgba(3, 5, 13, 0.8);
}

#particleCanvas {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
    touch-action: none;
    user-select: none;
}

.canvas-empty-state {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: grid;
    place-items: center;
    align-content: center;
    gap: 12px;
    padding: 24px;
    text-align: center;
    pointer-events: none;
    color: rgba(255, 255, 255, 0.75);
    transition: opacity 220ms ease, transform 220ms ease;
}

.canvas-empty-state strong {
    font-size: clamp(1.1rem, 3vw, 2rem);
    letter-spacing: -0.04em;
}

.canvas-empty-state span {
    color: rgba(255, 255, 255, 0.5);
}

.canvas-empty-state.is-hidden {
    opacity: 0;
    transform: scale(0.985);
}

.empty-orb {
    width: 86px;
    height: 86px;
    border-radius: 50%;
    background:
        radial-gradient(circle at 34% 24%, white, rgba(157, 228, 255, 0.9) 18%, rgba(112, 84, 255, 0.42) 52%, transparent 72%);
    box-shadow:
        0 0 42px rgba(126, 214, 255, 0.46),
        0 0 100px rgba(120, 95, 255, 0.3);
    animation: floatOrb 3s ease-in-out infinite;
}

@keyframes floatOrb {

    0%,
    100% {
        transform: translateY(0) scale(1);
    }

    50% {
        transform: translateY(-8px) scale(1.04);
    }
}

@media (max-width: 1080px) {
    .particle-page {
        grid-template-columns: 1fr;
    }

    .intro-card {
        order: 1;
    }

    .stage-card {
        order: 2;
    }

    h1 {
        max-width: 13ch;
    }

    .canvas-wrap {
        min-height: 62dvh;
    }
}

@media (max-width: 640px) {
    .particle-page {
        padding: 12px;
        gap: 12px;
    }

    .glass-card {
        border-radius: 24px;
    }

    .intro-card {
        padding: 18px;
    }

    .upload-grid,
    .button-row {
        grid-template-columns: 1fr;
    }

    .upload-card {
        min-height: 118px;
    }

    .stage-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .stage-badge {
        width: fit-content;
    }

    .canvas-wrap {
        min-height: 58dvh;
        border-radius: 20px;
    }
}

@media (max-width: 390px) {
    .particle-page {
        padding: 8px;
    }

    .intro-card,
    .stage-card {
        padding: 14px;
    }

    h1 {
        font-size: 2.05rem;
    }

    .primary-button,
    .ghost-button {
        min-height: 46px;
    }
}