/* --- Variables & Global Styles --- */
:root {
    --primary-color: #00bfff; /* Deep Sky Blue */
    --accent-color: #ff4757; /* Vibrant Red */
    --dark-bg: #0d0c22; /* Deep Indigo */
    --light-bg-transparent: rgba(26, 26, 46, 0.4);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-color: #f0f0f0;
    --text-muted: #a0a0a0;
    --font-family-heading: 'Poppins', sans-serif;
    --font-family-body: 'Roboto', sans-serif;
}

body {
    font-family: var(--font-family-body);
    background-color: var(--dark-bg);
    color: var(--text-color);
    line-height: 1.6;
    margin: 0;
    padding: 2rem;
    overflow-x: hidden;
}

/* --- Animated Background --- */
.background-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: linear-gradient(315deg, var(--primary-color), var(--dark-bg), var(--accent-color));
    background-size: 400% 400%;
    animation: gradient-flow 15s ease infinite;
}

@keyframes gradient-flow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}


/* --- Main Container & Glassmorphism --- */
.container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2.5rem;
    background: var(--light-bg-transparent);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 20px;
    border: 1px solid var(--border-color);
    box-shadow: 0 15px 35px rgba(0,0,0,0.4);
}

header {
    text-align: center;
    margin-bottom: 2rem;
}
header h1 {
    font-family: var(--font-family-heading);
    color: #fff;
    text-shadow: 0 0 10px var(--primary-color);
}
header p {
    color: var(--text-muted);
}

/* --- Form & Upgraded Inputs --- */
#analysis-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}
.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}
textarea {
    width: 100%;
    padding: 0.75rem;
    background-color: rgba(0,0,0,0.2);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    font-size: 1rem;
    resize: vertical;
    transition: border-color 0.3s, box-shadow 0.3s;
}
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 15px rgba(0, 191, 255, 0.5);
}
.separator {
    text-align: center;
    color: var(--text-muted);
    font-weight: 600;
    position: relative;
}
.separator span {
    background: #1a1a2e;
    padding: 0 10px;
}
.separator::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 1px;
    background: var(--border-color);
    left: 0;
    top: 50%;
    z-index: -1;
}

/* Custom File Input */
input[type="file"] {
    display: none;
}
.file-label {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s, border-color 0.3s;
}
.file-label:hover {
    background-color: rgba(0, 191, 255, 0.1);
    border-color: var(--primary-color);
}
.file-label i {
    margin-right: 0.75rem;
    font-size: 1.5rem;
    color: var(--primary-color);
}


/* Upgraded Button */
.btn-analyze {
    padding: 1rem 1.5rem;
    font-size: 1.1rem;
    font-weight: 600;
    font-family: var(--font-family-heading);
    color: #fff;
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: 0 5px 15px rgba(255, 71, 87, 0.3);
}
.btn-analyze:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 191, 255, 0.5);
}
.btn-analyze:disabled {
    background: #555;
    cursor: not-allowed;
    transform: translateY(0);
    box-shadow: none;
}

/* --- Results & Upgraded Loader --- */
#results-container {
    margin-top: 2rem;
}
.loader-hidden {
    display: none;
}
#loader {
    text-align: center;
    padding: 2rem;
}
#loader p {
    margin-top: 1rem;
    color: var(--primary-color);
    font-weight: 500;
}
.scanner-line {
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    animation: scan 2s infinite;
    border-radius: 3px;
}
@keyframes scan {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* --- Result Card Styling --- */
.result-card {
    background: var(--light-bg-transparent);
    padding: 1.5rem;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}
.error-card {
    border-color: var(--accent-color);
    background: rgba(255, 71, 87, 0.1);
}
.result-card h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.result-card p {
    margin-bottom: 0.5rem;
}
.result-card .evidence-item {
    background-color: rgba(0,0,0,0.2);
    padding: 0.75rem;
    border-radius: 6px;
    margin-top: 0.5rem;
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
}
.result-card .sources-section {
    margin-top: 1rem;
}
.result-card .sources-section h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}
.result-card .verdict--true {
    color: #4CAF50;
    font-weight: bold;
}
.result-card .verdict--false {
    color: #f44336;
    font-weight: bold;
}
.result-card .verdict--neutral {
    color: #ff9800;
    font-weight: bold;
}
.result-card .verdict--unverifiable {
    color: #9e9e9e;
    font-weight: bold;
}

/* --- Scroll Animations --- */
.animate-on-scroll {
    opacity: 0;
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.animate-on-scroll.fade-in {
    transform: translateY(30px);
}
.animate-on-scroll.slide-up {
    transform: translateY(50px);
}
.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}


footer {
    text-align: center;
    margin-top: 3rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* --- Responsive --- */
@media (max-width: 600px) {
    body { padding: 0.5rem; }
    .container { padding: 1.5rem; margin: 1rem; }
    header h1 { font-size: 1.8rem; }
}