/* Clean & Professional AI Tool Styling */
:root {
    --font-main: 'Plus Jakarta Sans', sans-serif;
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --border-color: #e2e8f0;
    --border-dashed: #cbd5e1;
    --transition-smooth: all 0.25s ease;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-main);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* Header Styling */
.main-header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.head-btn {
    background: #f1f5f9;
    color: #334155;
    border: 1px solid var(--border-dashed);
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-smooth);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.head-btn:hover {
    background: #ffa513;
    color: #000000;
    border-color: #ffa513;
}

/* Modern File Drop Area Styling */
.file-drop-area {
    border: 2px dashed var(--border-dashed);
    background: var(--bg-main);
    border-radius: 12px;
    padding: 32px 16px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    box-sizing: border-box;
}

.file-drop-area:hover {
    border-color: var(--primary-color);
    background: #f0f6ff;
}

/* Hide default file input inside drop area */
.file-drop-area input[type="file"] {
    display: none;
}

.file-msg {
    font-size: 0.875rem;
    font-weight: 600;
    color: #475569;
}

.file-submsg {
    font-size: 0.75rem;
    color: #94a3b8;
    margin-top: 4px;
}

/* Footer Styling */
.site-footer {
    text-align: center;
    padding: 20px 0;
    background: var(--bg-card);
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.developer-name {
    font-weight: 600;
    color: var(--primary-color);
}