:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border-color: rgba(148, 163, 184, 0.1);
    --glow-color: rgba(59, 130, 246, 0.15);
    --success-color: #10b981;
    --error-color: #ef4444;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    position: relative;
}

/* Atmospheric Glow */
.background-glow {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--glow-color) 0%, transparent 70%);
    z-index: -1;
    pointer-events: none;
}

.container {
    width: 100%;
    max-width: 500px;
    padding: 2rem;
    z-index: 1;
}

header {
    text-align: center;
    margin-bottom: 2.5rem;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff 0%, #cbd5e1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: transform 0.2s ease, opacity 0.3s ease;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.card h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.instruction {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    line-height: 1.4;
}

/* File Upload Styling */
input[type="file"] {
    display: none;
}

.custom-file-upload {
    display: block;
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px dashed var(--text-muted);
    border-radius: 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--primary-color);
    font-weight: 500;
}

.custom-file-upload:hover {
    border-color: var(--primary-color);
    background: rgba(59, 130, 246, 0.05);
}

.status-indicator {
    margin-top: 1rem;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
}

.dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--text-muted);
    display: inline-block;
}

.status-indicator.success .dot {
    background-color: var(--success-color);
    box-shadow: 0 0 8px var(--success-color);
}

.status-indicator.success {
    color: var(--success-color);
}

/* Search Section */
.search-section.disabled {
    opacity: 0.5;
    pointer-events: none;
}

.input-group {
    display: flex;
    gap: 0.5rem;
}

input[type="text"] {
    flex: 1;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--border-color);
    padding: 0.8rem 1rem;
    border-radius: 8px;
    color: white;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
    font-family: inherit;
}

button:hover {
    background-color: var(--primary-hover);
}

/* Results */
.result-box {
    margin-top: 1.5rem;
    background: rgba(15, 23, 42, 0.4);
    border-radius: 8px;
    padding: 1rem;
    border-left: 3px solid var(--primary-color);
    animation: fadeIn 0.3s ease;
}

.result-box.hidden {
    display: none;
}

.result-box.error {
    border-left-color: var(--error-color);
}

.label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.message {
    font-size: 1.1rem;
    font-weight: 500;
}

footer {
    text-align: center;
    color: rgba(148, 163, 184, 0.4);
    font-size: 0.75rem;
    margin-top: 2rem;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}