:root {
    /* Light Mode */
    --bg-color: #f9fafb;
    --container-bg: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --primary-color: #000000;
    --primary-hover: #374151;
    --input-bg: #ffffff;
    --focus-ring: rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --error-color: #ef4444;
    --success-color: #10b981;
}

@media (prefers-color-scheme: dark) {
    :root {
        /* Dark Mode */
        --bg-color: #0f1115;
        --container-bg: #161b22;
        --text-primary: #f3f4f6;
        --text-secondary: #9ca3af;
        --border-color: #30363d;
        --primary-color: #ffffff;
        --primary-hover: #e5e7eb;
        --input-bg: #0d1117;
        --focus-ring: rgba(255, 255, 255, 0.1);
        --error-color: #f87171;
        --success-color: #34d399;
    }
}

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

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: linear-gradient(135deg, #0a0f1e 0%, #000000 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.5;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 2rem 1rem;
}

.container {
    background-color: var(--container-bg);
    width: 100%;
    max-width: 700px;
    border-radius: 12px;
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

h1 {
    font-size: 2.75rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, #4ade80 0%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-section {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.section-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.form-group-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.divider {
    border: 0;
    height: 1px;
    background-color: var(--border-color);
    margin: 2rem 0;
}

.hint-text {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.35rem;
    margin-bottom: 0.35rem;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.privacy-note {
    color: var(--success-color);
    opacity: 0.9;
}

label {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: inline-block;
}

input[type="text"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--input-bg);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.875rem;
    transition: all 0.2s ease;
    outline: none;
    box-shadow: var(--shadow-sm);
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--text-secondary);
    box-shadow: 0 0 0 3px var(--focus-ring);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

input[type="file"] {
    display: none;
}

.file-upload-label {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem;
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    background-color: transparent;
    transition: all 0.2s ease;
    text-align: center;
    font-weight: 500;
    color: var(--text-secondary);
}

.drag-drop-zone {
    padding: 2.5rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    background-color: rgba(0, 0, 0, 0.01);
}

@media (prefers-color-scheme: dark) {
    .drag-drop-zone {
        background-color: rgba(255, 255, 255, 0.01);
    }
}

.drag-drop-zone:hover {
    background-color: rgba(74, 222, 128, 0.03);
    border-color: #4ade80;
    color: var(--text-primary);
}

.upload-icon {
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

.drag-drop-zone:hover .upload-icon {
    color: #4ade80;
}

.file-upload-label.has-file {
    border-style: solid;
    border-color: #4ade80;
    color: var(--text-primary);
    background-color: rgba(74, 222, 128, 0.05);
}

.file-upload-label.has-file .upload-icon {
    color: #4ade80;
}

button {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    border: none;
    background-color: var(--primary-color);
    color: var(--bg-color);
    font-family: inherit;
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
    box-shadow: var(--shadow-sm);
}

@media (prefers-color-scheme: dark) {
    button {
        color: var(--text-primary);
        background-color: #21262d;
        border: 1px solid var(--border-color);
    }

    button:hover {
        background-color: #30363d;
    }
}

@media (prefers-color-scheme: light) {
    button:hover {
        background-color: var(--primary-hover);
    }
}

button:active {
    transform: scale(0.98);
}

button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.status-container {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    font-size: 0.875rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}



.status-container.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.status-container.success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-container.loading {
    background-color: rgba(107, 114, 128, 0.1);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.hidden {
    display: none !important;
}

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

@media (max-width: 600px) {
    .container {
        padding: 1.5rem;
    }

    .form-group-row {
        grid-template-columns: 1fr;
    }
}

/* Result Area Styles */
.result-area {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.result-area h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.result-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

@media (prefers-color-scheme: light) {
    .btn-secondary:hover {
        background-color: var(--focus-ring);
    }
}

@media (prefers-color-scheme: dark) {
    .btn-secondary:hover {
        background-color: #30363d;
    }
}

#pdf-viewer {
    width: 100%;
    height: 600px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: #ffffff;
}