@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;700&display=swap');

* {
    box-sizing: border-box;
}

:root {
    --ink: #f0f2f5;
    --muted: #8b92a5;
    --line: rgba(255, 255, 255, 0.08);
    --accent: #00f3ff;
    --accent-secondary: #bc13fe;
    --bg-dark: #050508;
    --surface: rgba(255, 255, 255, 0.02);
    
    /* Result colors */
    --pos: #00ff9d;
    --neg: #ff4b4b;
    --neu: #f5d300;
}

body {
    min-height: 100vh;
    margin: 0;
    color: var(--ink);
    background-color: var(--bg-dark);
    /* Subtle AI node gradient background */
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(188, 19, 254, 0.15), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(0, 243, 255, 0.15), transparent 25%);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 15px;
    line-height: 1.5;
}

/* Data grid overlay */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    opacity: 0.15;
    background-image: 
        linear-gradient(var(--line) 1px, transparent 1px),
        linear-gradient(90deg, var(--line) 1px, transparent 1px);
    background-size: 30px 30px;
    mask-image: radial-gradient(circle at center, black, transparent 80%);
    pointer-events: none;
    z-index: -1;
}

main {
    position: relative;
    width: min(92%, 900px);
    min-height: 100vh;
    margin: auto;
    display: flex;
    flex-direction: column;
}

header,
footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-family: 'JetBrains Mono', monospace;
}

header {
    height: 80px;
    border-bottom: 1px solid var(--line);
}

footer {
    padding: 30px 0;
}

header a {
    display: flex;
    gap: 12px;
    align-items: center;
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    text-transform: none;
    letter-spacing: -0.5px;
}

header i {
    width: 12px;
    height: 12px;
    background: var(--accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent), 0 0 20px var(--accent);
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 243, 255, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(0, 243, 255, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 243, 255, 0); }
}

.panel {
    position: relative;
    width: min(100%, 720px);
    margin: auto;
    padding: 50px;
    background: var(--surface);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--line);
    border-radius: 24px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
    overflow: hidden;
}

/* Glowing orb representing the neural core */
.orb {
    position: absolute;
    width: 300px;
    height: 300px;
    right: -100px;
    top: -100px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(188, 19, 254, 0.1) 0%, transparent 70%);
    border: 1px solid rgba(188, 19, 254, 0.2);
    box-shadow: inset 0 0 60px rgba(0, 243, 255, 0.1);
    z-index: -1;
}

.tag {
    display: inline-block;
    margin: 0 0 16px 0;
    padding: 6px 12px;
    color: var(--accent);
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    background: rgba(0, 243, 255, 0.1);
    border: 1px solid rgba(0, 243, 255, 0.2);
    border-radius: 4px;
}

h1 {
    margin: 0 0 12px 0;
    font-size: 52px;
    line-height: 1.1;
    font-weight: 700;
    letter-spacing: -1.5px;
}

h1 em {
    color: var(--accent-secondary);
    font-style: normal;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.intro {
    color: var(--muted);
    font-size: 16px;
    max-width: 80%;
}

nav {
    display: flex;
    gap: 8px;
    margin: 40px 0 20px;
    padding: 6px;
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--line);
    border-radius: 12px;
}

nav button {
    flex: 1;
    padding: 12px;
    color: var(--muted);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
}

nav button:hover {
    color: var(--ink);
    background: rgba(255,255,255,0.05);
}

.active {
    color: var(--accent) !important;
    background: rgba(0, 243, 255, 0.05) !important;
    border-color: rgba(0, 243, 255, 0.2) !important;
}

form {
    display: grid;
    gap: 16px;
}

textarea,
.upload {
    width: 100%;
    min-height: 160px;
    padding: 20px;
    color: var(--ink);
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--line);
    border-radius: 12px;
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    transition: all 0.3s ease;
}

textarea {
    resize: vertical;
    outline: 0;
}

textarea:focus,
.upload:hover {
    border-color: var(--accent);
    background: rgba(0, 243, 255, 0.02);
    box-shadow: 0 0 0 4px rgba(0, 243, 255, 0.1);
}

textarea::placeholder {
    color: rgba(255, 255, 255, 0.2);
}

.upload {
    display: grid;
    place-content: center;
    text-align: center;
    cursor: pointer;
    border-style: dashed;
    border-width: 2px;
}

.upload strong {
    font-size: 18px;
    font-weight: 600;
}

.upload small {
    margin: 8px 0 20px;
    color: var(--muted);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
}

.upload input {
    max-width: 100%;
    font-family: 'Inter', sans-serif;
}

/* File input styling */
input[type="file"]::file-selector-button {
    padding: 8px 16px;
    border-radius: 6px;
    background: rgba(255,255,255,0.1);
    border: 1px solid var(--line);
    color: var(--ink);
    cursor: pointer;
    transition: all 0.2s;
    font-family: 'Inter', sans-serif;
    font-weight: 500;
}

input[type="file"]::file-selector-button:hover {
    background: rgba(255,255,255,0.15);
}

.submit {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    min-height: 52px;
    padding: 0 24px;
    color: #000;
    background: var(--accent);
    border: 0;
    border-radius: 10px;
    text-decoration: none;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 0 20px rgba(0, 243, 255, 0.2);
}

.submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 243, 255, 0.4);
    background: #4dffff;
}

/* --- Results Section --- */
.result {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.result.positive {
    --accent: var(--pos);
    --accent-secondary: rgba(0, 255, 157, 0.2);
}

.result.negative {
    --accent: var(--neg);
    --accent-secondary: rgba(255, 75, 75, 0.2);
}

.result.neutral {
    --accent: var(--neu);
    --accent-secondary: rgba(245, 211, 0, 0.2);
}

.pulse {
    width: 80px;
    height: 80px;
    margin: 0 auto 30px;
    border: 2px solid var(--accent);
    border-radius: 50%;
    background: var(--accent-secondary);
    box-shadow: 0 0 40px var(--accent-secondary);
    position: relative;
}

.pulse::before {
    content: '';
    position: absolute;
    inset: -10px;
    border: 1px dashed var(--accent);
    border-radius: 50%;
    animation: spin 10s linear infinite;
    opacity: 0.5;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.result h1 {
    color: var(--accent);
    font-size: 42px;
    margin-bottom: 30px;
    text-shadow: 0 0 20px var(--accent-secondary);
}

blockquote {
    width: 100%;
    margin: 0 0 30px 0;
    padding: 24px;
    color: var(--ink);
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--line);
    border-left: 3px solid var(--accent);
    border-radius: 8px;
    line-height: 1.6;
    text-align: left;
}

blockquote small {
    display: block;
    margin-bottom: 12px;
    color: var(--muted);
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

[hidden] {
    display: none !important;
}

@media (max-width: 600px) {
    header {
        height: 60px;
    }

    .panel {
        padding: 30px 20px;
    }

    h1 {
        font-size: 38px;
    }

    footer {
        flex-direction: column;
        gap: 10px;
        text-align: center;
    }
}