:root {
    --vpa-bg: #08111f;
    --vpa-card: rgba(12, 21, 38, 0.78);
    --vpa-card-border: rgba(255, 255, 255, 0.08);
    --vpa-text: #eaf2ff;
    --vpa-text-soft: #9eb0cb;
    --vpa-primary: #43d38f;
    --vpa-primary-hover: #35c27f;
    --vpa-secondary: rgba(255, 255, 255, 0.08);
    --vpa-secondary-hover: rgba(255, 255, 255, 0.12);
    --vpa-danger: #ff6b6b;
    --vpa-warning: #ffb84d;
    --vpa-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
    --vpa-radius-xl: 24px;
    --vpa-radius-lg: 18px;
    --vpa-radius-md: 14px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    background:
        radial-gradient(circle at top left, rgba(49, 86, 255, 0.18), transparent 30%),
        radial-gradient(circle at bottom right, rgba(67, 211, 143, 0.14), transparent 26%),
        linear-gradient(180deg, #07101d 0%, #091321 100%);
    color: var(--vpa-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
}

body {
    overflow-x: hidden;
}

.vpa-page {
    position: relative;
    min-height: 100vh;
    padding: 40px 20px 60px;
}

.vpa-shell {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
}

.vpa-bg-glow {
    position: fixed;
    border-radius: 9999px;
    filter: blur(100px);
    opacity: 0.55;
    pointer-events: none;
    z-index: 0;
}

.vpa-bg-glow-1 {
    top: 80px;
    left: -120px;
    width: 260px;
    height: 260px;
    background: rgba(73, 102, 255, 0.22);
}

.vpa-bg-glow-2 {
    right: -80px;
    bottom: 40px;
    width: 300px;
    height: 300px;
    background: rgba(67, 211, 143, 0.15);
}

.vpa-hero {
    text-align: center;
    margin-bottom: 28px;
}

.vpa-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 7px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    color: #c8ffde;
    background: rgba(67, 211, 143, 0.14);
    border: 1px solid rgba(67, 211, 143, 0.22);
    margin-bottom: 14px;
}

.vpa-title {
    margin: 0;
    font-size: 42px;
    line-height: 1.15;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.vpa-subtitle {
    width: min(860px, 92%);
    margin: 16px auto 0;
    color: var(--vpa-text-soft);
    font-size: 16px;
    line-height: 1.8;
}

.vpa-card {
    background: var(--vpa-card);
    border: 1px solid var(--vpa-card-border);
    box-shadow: var(--vpa-shadow);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-radius: var(--vpa-radius-xl);
    padding: 28px;
    margin-bottom: 24px;
}

.vpa-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 20px;
}

.vpa-card-header h2 {
    margin: 0 0 6px;
    font-size: 24px;
    font-weight: 700;
}

.vpa-card-header p {
    margin: 0;
    color: var(--vpa-text-soft);
    font-size: 14px;
}

.vpa-form {
    width: 100%;
}

.vpa-dropzone {
    position: relative;
    border: 1.5px dashed rgba(255, 255, 255, 0.14);
    border-radius: 22px;
    min-height: 280px;
    background:
        linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.015)),
        rgba(7, 13, 24, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all .25s ease;
    overflow: hidden;
}

.vpa-dropzone:hover,
.vpa-dropzone.vpa-dragover {
    border-color: rgba(67, 211, 143, 0.5);
    box-shadow: inset 0 0 0 1px rgba(67, 211, 143, 0.18);
    transform: translateY(-1px);
}

.vpa-file-input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
}

.vpa-dropzone-inner {
    text-align: center;
    padding: 24px;
    pointer-events: none;
}

.vpa-upload-icon {
    width: 76px;
    height: 76px;
    margin: 0 auto 16px;
    border-radius: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 34px;
    background: linear-gradient(135deg, rgba(67, 211, 143, 0.18), rgba(73, 102, 255, 0.18));
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
}

.vpa-dropzone-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}

.vpa-dropzone-desc {
    font-size: 14px;
    color: var(--vpa-text-soft);
    margin-bottom: 18px;
}

.vpa-btn {
    border: none;
    outline: none;
    cursor: pointer;
    border-radius: 14px;
    padding: 13px 22px;
    font-size: 15px;
    font-weight: 700;
    transition: all .2s ease;
}

.vpa-btn:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

.vpa-btn-primary {
    color: #062514;
    background: linear-gradient(180deg, #59ebb0 0%, #43d38f 100%);
    box-shadow: 0 12px 30px rgba(67, 211, 143, 0.24);
}

.vpa-btn-primary:hover:not(:disabled) {
    background: linear-gradient(180deg, #67f2b8 0%, #35c27f 100%);
    transform: translateY(-1px);
}

.vpa-btn-secondary {
    color: var(--vpa-text);
    background: var(--vpa-secondary);
    border: 1px solid rgba(255,255,255,0.08);
    pointer-events: auto;
}

.vpa-btn-secondary:hover:not(:disabled) {
    background: var(--vpa-secondary-hover);
}

.vpa-actions {
    margin-top: 18px;
    display: flex;
    justify-content: flex-end;
}

.vpa-selected-file {
    margin-top: 16px;
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(255,255,255,0.045);
    border: 1px solid rgba(255,255,255,0.06);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.vpa-file-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 12px;
    align-items: center;
}

.vpa-file-label {
    padding: 4px 10px;
    border-radius: 999px;
    background: rgba(67, 211, 143, 0.14);
    color: #baf5d6;
    font-size: 12px;
    font-weight: 700;
}

.vpa-file-name {
    font-size: 14px;
    font-weight: 700;
}

.vpa-file-size {
    font-size: 13px;
    color: var(--vpa-text-soft);
}

.vpa-text-btn {
    border: none;
    background: transparent;
    color: #ffb2b2;
    cursor: pointer;
    font-size: 14px;
    font-weight: 700;
}

.vpa-text-btn:hover {
    color: #ffd0d0;
}

.vpa-message-box {
    margin-top: 16px;
    padding: 13px 16px;
    border-radius: 14px;
    font-size: 14px;
    line-height: 1.6;
}

.vpa-message-success {
    background: rgba(67, 211, 143, 0.12);
    color: #c2ffe0;
    border: 1px solid rgba(67, 211, 143, 0.18);
}

.vpa-message-error {
    background: rgba(255, 107, 107, 0.11);
    color: #ffd3d3;
    border: 1px solid rgba(255, 107, 107, 0.18);
}

.vpa-message-info {
    background: rgba(73, 102, 255, 0.11);
    color: #dbe4ff;
    border: 1px solid rgba(73, 102, 255, 0.2);
}

.vpa-progress-wrap {
    margin-top: 16px;
}

.vpa-progress-top {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--vpa-text-soft);
    margin-bottom: 8px;
}

.vpa-progress-bar {
    height: 10px;
    background: rgba(255,255,255,0.06);
    border-radius: 999px;
    overflow: hidden;
}

.vpa-progress-bar-inner {
    height: 100%;
    width: 0%;
    border-radius: 999px;
    background: linear-gradient(90deg, #4966ff 0%, #43d38f 100%);
    transition: width .2s ease;
}

.vpa-result-card {
    padding-bottom: 24px;
}

.vpa-result-actions {
    display: flex;
    gap: 10px;
}

.vpa-result-layout {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 22px;
}

.vpa-result-side {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.vpa-mini-stat {
    padding: 14px;
    border-radius: 16px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
}

.vpa-mini-stat-label {
    display: block;
    font-size: 12px;
    color: var(--vpa-text-soft);
    margin-bottom: 6px;
}

.vpa-mini-stat-value {
    display: block;
    font-size: 15px;
    font-weight: 700;
    word-break: break-all;
}

.vpa-result-main {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.vpa-result-block {
    border-radius: 18px;
    background: rgba(255,255,255,0.035);
    border: 1px solid rgba(255,255,255,0.06);
    overflow: hidden;
}

.vpa-result-block-title {
    padding: 14px 16px;
    font-size: 14px;
    font-weight: 700;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    background: rgba(255,255,255,0.025);
}

.vpa-result-pre {
    margin: 0;
    padding: 18px;
    min-height: 220px;
    white-space: pre-wrap;
    word-break: break-word;
    line-height: 1.7;
    color: #eef5ff;
    font-size: 14px;
    overflow-x: auto;
}

.vpa-markdown-preview {
    padding: 18px;
    line-height: 1.85;
    font-size: 15px;
    color: #eef5ff;
}

.vpa-markdown-preview h1,
.vpa-markdown-preview h2,
.vpa-markdown-preview h3,
.vpa-markdown-preview h4 {
    margin-top: 0;
    color: #ffffff;
}

.vpa-markdown-preview table {
    width: 100%;
    border-collapse: collapse;
    margin: 14px 0;
    font-size: 14px;
    overflow: hidden;
}

.vpa-markdown-preview th,
.vpa-markdown-preview td {
    border: 1px solid rgba(255,255,255,0.1);
    padding: 10px 12px;
    text-align: left;
    vertical-align: top;
}

.vpa-markdown-preview th {
    background: rgba(255,255,255,0.06);
    font-weight: 700;
}

.vpa-markdown-preview code {
    background: rgba(255,255,255,0.08);
    border-radius: 8px;
    padding: 2px 6px;
}

.vpa-markdown-preview pre {
    background: rgba(0,0,0,0.22);
    padding: 14px;
    border-radius: 14px;
    overflow-x: auto;
}

.vpa-markdown-preview blockquote {
    margin: 14px 0;
    padding: 10px 14px;
    border-left: 4px solid rgba(67, 211, 143, 0.5);
    background: rgba(67, 211, 143, 0.07);
    border-radius: 0 12px 12px 0;
}

.vpa-hidden {
    display: none !important;
}

@media (max-width: 920px) {
    .vpa-title {
        font-size: 34px;
    }

    .vpa-result-layout {
        grid-template-columns: 1fr;
    }

    .vpa-card {
        padding: 20px;
    }
}

@media (max-width: 640px) {
    .vpa-page {
        padding: 24px 12px 40px;
    }

    .vpa-title {
        font-size: 28px;
    }

    .vpa-subtitle {
        font-size: 14px;
    }

    .vpa-dropzone {
        min-height: 230px;
    }

    .vpa-dropzone-title {
        font-size: 18px;
    }

    .vpa-card-header {
        flex-direction: column;
    }

    .vpa-selected-file {
        flex-direction: column;
        align-items: flex-start;
    }

    .vpa-actions {
        justify-content: stretch;
    }

    .vpa-actions .vpa-btn {
        width: 100%;
    }
}

.vpa-auth-overlay {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background:
        linear-gradient(180deg, rgba(4, 9, 18, 0.82), rgba(4, 9, 18, 0.92)),
        rgba(0, 0, 0, 0.45);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.vpa-auth-overlay.vpa-hidden {
    display: none !important;
}

.vpa-auth-card {
    width: 100%;
    max-width: 460px;
    padding: 30px 26px;
    border-radius: 24px;
    background: rgba(12, 21, 38, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
    text-align: center;
}

.vpa-auth-title {
    margin: 0 0 10px;
    font-size: 28px;
    font-weight: 800;
    color: #fff;
}

.vpa-auth-desc {
    margin: 0 0 22px;
    color: #9eb0cb;
    font-size: 14px;
    line-height: 1.8;
}

.vpa-auth-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.vpa-auth-input {
    width: 100%;
    height: 52px;
    padding: 0 16px;
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.05);
    color: #eef5ff;
    font-size: 15px;
    outline: none;
}

.vpa-auth-input:focus {
    border-color: rgba(67, 211, 143, 0.5);
    box-shadow: 0 0 0 3px rgba(67, 211, 143, 0.12);
}

.vpa-auth-disabled {
    pointer-events: none;
    user-select: none;
}

.vpa-auth-disabled .vpa-card,
.vpa-auth-disabled .vpa-hero {
    filter: blur(0.8px);
}