/* ==========================================================================
   PDF to Word — Custom Styles
   All classes prefixed with "ptw-" to avoid conflicts with Google AdSense.
   No universal selectors (*), no global element overrides.
   ========================================================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
    --ptw-blue: #2563eb;
    --ptw-blue-dark: #1d4ed8;
    --ptw-blue-light: #dbeafe;
    --ptw-blue-50: #eff6ff;
    --ptw-green: #22c55e;
    --ptw-red: #ef4444;
    --ptw-gray-50: #f9fafb;
    --ptw-gray-100: #f3f4f6;
    --ptw-gray-200: #e5e7eb;
    --ptw-gray-300: #d1d5db;
    --ptw-gray-500: #6b7280;
    --ptw-gray-600: #4b5563;
    --ptw-gray-700: #374151;
    --ptw-gray-800: #1f2937;
    --ptw-gray-900: #111827;
    --ptw-white: #ffffff;
    --ptw-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --ptw-radius: 8px;
    --ptw-radius-lg: 12px;
    --ptw-shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --ptw-shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --ptw-shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
    --ptw-max-width: 1100px;
}

/* ---------- Base Reset (scoped to ptw elements only) ---------- */
.ptw-header,
.ptw-main,
.ptw-footer,
.ptw-header *,
.ptw-main *,
.ptw-footer * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ---------- Typography base for ptw containers ---------- */
.ptw-header,
.ptw-main,
.ptw-footer {
    font-family: var(--ptw-font);
    color: var(--ptw-gray-800);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ---------- Ensure [hidden] works when display is set via CSS ---------- */
.ptw-main [hidden] {
    display: none !important;
}

/* ---------- Screen Reader Only ---------- */
.ptw-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ==========================================================================
   Header / Navigation
   ========================================================================== */
.ptw-header {
    background: var(--ptw-white);
    border-bottom: 1px solid var(--ptw-gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
}

.ptw-nav {
    max-width: var(--ptw-max-width);
    margin: 0 auto;
    padding: 0 20px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.ptw-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--ptw-gray-900);
}

.ptw-logo:hover {
    color: var(--ptw-blue);
}

.ptw-logo-icon {
    flex-shrink: 0;
}

.ptw-nav-links {
    display: flex;
    gap: 24px;
}

.ptw-nav-link {
    text-decoration: none;
    color: var(--ptw-gray-600);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s;
}

.ptw-nav-link:hover {
    color: var(--ptw-blue);
}

/* ==========================================================================
   Main Content
   ========================================================================== */
.ptw-main {
    max-width: var(--ptw-max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.ptw-hero {
    text-align: center;
    padding: 56px 20px 32px;
}

.ptw-hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--ptw-gray-900);
    line-height: 1.2;
    margin-bottom: 16px;
}

.ptw-hero-sub {
    font-size: 1.15rem;
    color: var(--ptw-gray-600);
    max-width: 560px;
    margin: 0 auto;
}

/* ==========================================================================
   Upload Section
   ========================================================================== */
.ptw-upload-section {
    max-width: 640px;
    margin: 0 auto 60px;
}

.ptw-upload-zone {
    border: 2px dashed var(--ptw-gray-300);
    border-radius: var(--ptw-radius-lg);
    padding: 48px 24px;
    text-align: center;
    transition: border-color 0.2s, background-color 0.2s;
    cursor: pointer;
    background: var(--ptw-gray-50);
}

.ptw-upload-zone:hover,
.ptw-upload-zone.ptw-drag-over {
    border-color: var(--ptw-blue);
    background: var(--ptw-blue-50);
}

.ptw-upload-icon {
    margin-bottom: 16px;
}

.ptw-upload-text {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--ptw-gray-700);
    margin-bottom: 8px;
}

.ptw-upload-or {
    color: var(--ptw-gray-500);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.ptw-upload-hint {
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--ptw-gray-500);
}

/* ---------- Buttons ---------- */
.ptw-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--ptw-font);
    border: none;
    border-radius: var(--ptw-radius);
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s, box-shadow 0.2s;
    text-decoration: none;
    line-height: 1.4;
}

.ptw-btn:active {
    transform: scale(0.98);
}

.ptw-btn-browse {
    background: var(--ptw-blue);
    color: var(--ptw-white);
    padding: 10px 24px;
    font-size: 0.95rem;
}

.ptw-btn-browse:hover {
    background: var(--ptw-blue-dark);
}

.ptw-btn-convert {
    display: flex;
    width: 100%;
    margin-top: 20px;
    background: var(--ptw-blue);
    color: var(--ptw-white);
    font-size: 1.1rem;
    padding: 16px 32px;
    box-shadow: var(--ptw-shadow-md);
}

.ptw-btn-convert:hover:not(:disabled) {
    background: var(--ptw-blue-dark);
    box-shadow: var(--ptw-shadow-lg);
}

.ptw-btn-convert:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.ptw-btn-download {
    background: var(--ptw-green);
    color: var(--ptw-white);
    font-size: 1.1rem;
    padding: 14px 36px;
    box-shadow: var(--ptw-shadow-md);
}

.ptw-btn-download:hover {
    background: #16a34a;
    box-shadow: var(--ptw-shadow-lg);
}

.ptw-btn-new {
    background: transparent;
    color: var(--ptw-blue);
    border: 2px solid var(--ptw-blue);
    padding: 10px 24px;
    font-size: 0.95rem;
}

.ptw-btn-new:hover {
    background: var(--ptw-blue-50);
}

/* ---------- File Info ---------- */
.ptw-file-info {
    margin-top: 16px;
    background: var(--ptw-white);
    border: 1px solid var(--ptw-gray-200);
    border-radius: var(--ptw-radius);
    padding: 12px 16px;
}

.ptw-file-details {
    display: flex;
    align-items: center;
    gap: 12px;
}

.ptw-file-details > div {
    flex: 1;
    min-width: 0;
}

.ptw-file-name {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--ptw-gray-800);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ptw-file-size {
    display: block;
    font-size: 0.85rem;
    color: var(--ptw-gray-500);
}

.ptw-btn-remove {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--ptw-gray-500);
    cursor: pointer;
    padding: 4px 8px;
    line-height: 1;
    border-radius: 4px;
    transition: color 0.2s, background 0.2s;
    font-family: var(--ptw-font);
}

.ptw-btn-remove:hover {
    color: var(--ptw-red);
    background: #fef2f2;
}

/* ---------- Progress ---------- */
.ptw-progress-wrap {
    margin-top: 24px;
    text-align: center;
}

.ptw-progress-bar {
    width: 100%;
    height: 8px;
    background: var(--ptw-gray-200);
    border-radius: 4px;
    overflow: hidden;
}

.ptw-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--ptw-blue), #60a5fa);
    border-radius: 4px;
    transition: width 0.3s ease;
    animation: ptw-progress-pulse 2s ease-in-out infinite;
}

@keyframes ptw-progress-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.ptw-progress-text {
    margin-top: 12px;
    font-size: 0.95rem;
    color: var(--ptw-gray-600);
}

/* ---------- Result ---------- */
.ptw-result {
    margin-top: 24px;
}

.ptw-result-success,
.ptw-result-error {
    text-align: center;
    padding: 40px 24px;
    border-radius: var(--ptw-radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.ptw-result-success {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
}

.ptw-result-success h2 {
    color: #15803d;
    font-size: 1.4rem;
}

.ptw-result-success p {
    color: var(--ptw-gray-600);
}

.ptw-result-error {
    background: #fef2f2;
    border: 1px solid #fecaca;
}

.ptw-result-error h2 {
    color: #b91c1c;
    font-size: 1.4rem;
}

.ptw-result-error p {
    color: var(--ptw-gray-600);
}

/* ==========================================================================
   Features Section
   ========================================================================== */
.ptw-features {
    padding: 60px 0;
    text-align: center;
}

.ptw-features > h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--ptw-gray-900);
    margin-bottom: 40px;
}

.ptw-features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.ptw-feature-card {
    background: var(--ptw-white);
    border: 1px solid var(--ptw-gray-200);
    border-radius: var(--ptw-radius-lg);
    padding: 32px 20px;
    text-align: center;
    transition: box-shadow 0.2s, transform 0.2s;
}

.ptw-feature-card:hover {
    box-shadow: var(--ptw-shadow-lg);
    transform: translateY(-2px);
}

.ptw-feature-icon {
    margin-bottom: 16px;
}

.ptw-feature-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--ptw-gray-800);
    margin-bottom: 8px;
}

.ptw-feature-card p {
    font-size: 0.92rem;
    color: var(--ptw-gray-600);
    line-height: 1.6;
}

/* ==========================================================================
   How It Works Section
   ========================================================================== */
.ptw-how-it-works {
    padding: 60px 0;
    text-align: center;
    background: var(--ptw-gray-50);
    border-radius: var(--ptw-radius-lg);
    margin-bottom: 60px;
    padding-left: 20px;
    padding-right: 20px;
}

.ptw-how-it-works > h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--ptw-gray-900);
    margin-bottom: 40px;
}

.ptw-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.ptw-step {
    flex: 0 1 220px;
    text-align: center;
}

.ptw-step-number {
    width: 56px;
    height: 56px;
    line-height: 56px;
    border-radius: 50%;
    background: var(--ptw-blue);
    color: var(--ptw-white);
    font-size: 1.4rem;
    font-weight: 700;
    margin: 0 auto 16px;
}

.ptw-step h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--ptw-gray-800);
    margin-bottom: 8px;
}

.ptw-step p {
    font-size: 0.9rem;
    color: var(--ptw-gray-600);
    line-height: 1.5;
}

.ptw-step-arrow {
    color: var(--ptw-blue);
    flex-shrink: 0;
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.ptw-faq {
    padding: 0 0 60px;
    max-width: 720px;
    margin: 0 auto;
}

.ptw-faq > h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--ptw-gray-900);
    text-align: center;
    margin-bottom: 32px;
}

.ptw-faq-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ptw-faq-item {
    background: var(--ptw-white);
    border: 1px solid var(--ptw-gray-200);
    border-radius: var(--ptw-radius);
    overflow: hidden;
    transition: box-shadow 0.2s;
}

.ptw-faq-item:hover {
    box-shadow: var(--ptw-shadow);
}

.ptw-faq-item summary {
    padding: 16px 20px;
    font-weight: 600;
    font-size: 1rem;
    color: var(--ptw-gray-800);
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.ptw-faq-item summary::-webkit-details-marker {
    display: none;
}

.ptw-faq-item summary::after {
    content: '+';
    font-size: 1.4rem;
    font-weight: 400;
    color: var(--ptw-gray-500);
    flex-shrink: 0;
    transition: transform 0.2s;
}

.ptw-faq-item[open] summary::after {
    content: '\2212';
}

.ptw-faq-answer {
    padding: 0 20px 16px;
}

.ptw-faq-answer p {
    font-size: 0.95rem;
    color: var(--ptw-gray-600);
    line-height: 1.7;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.ptw-footer {
    background: var(--ptw-gray-900);
    color: var(--ptw-gray-300);
    padding: 32px 20px;
    margin-top: 40px;
}

.ptw-footer-inner {
    max-width: var(--ptw-max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.ptw-footer-inner p {
    font-size: 0.9rem;
}

.ptw-footer-links {
    display: flex;
    gap: 20px;
}

.ptw-footer-links a {
    color: var(--ptw-gray-300);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.ptw-footer-links a:hover {
    color: var(--ptw-white);
}

/* ==========================================================================
   Privacy / Content Pages
   ========================================================================== */
.ptw-page {
    padding: 48px 0 60px;
    max-width: 720px;
    margin: 0 auto;
}

.ptw-page h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--ptw-gray-900);
    margin-bottom: 8px;
}

.ptw-page-updated {
    font-size: 0.9rem;
    color: var(--ptw-gray-500);
    margin-bottom: 32px;
}

.ptw-content h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--ptw-gray-800);
    margin-top: 28px;
    margin-bottom: 12px;
}

.ptw-content p {
    font-size: 0.95rem;
    color: var(--ptw-gray-600);
    line-height: 1.7;
    margin-bottom: 12px;
}

.ptw-content ul {
    padding-left: 20px;
    margin-bottom: 12px;
}

.ptw-content li {
    font-size: 0.95rem;
    color: var(--ptw-gray-600);
    line-height: 1.7;
    margin-bottom: 8px;
}

/* ==========================================================================
   Error Page
   ========================================================================== */
.ptw-error-page {
    text-align: center;
    padding: 80px 0;
}

.ptw-error-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.ptw-error-content h1 {
    font-size: 1.6rem;
}

.ptw-error-content p {
    color: var(--ptw-gray-600);
    font-size: 1rem;
    max-width: 400px;
    margin-bottom: 8px;
}

.ptw-error-content .ptw-btn-convert {
    display: inline-flex;
    width: auto;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

/* Tablet */
@media (max-width: 992px) {
    .ptw-features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile */
@media (max-width: 640px) {
    .ptw-hero {
        padding: 40px 12px 24px;
    }

    .ptw-hero h1 {
        font-size: 1.8rem;
    }

    .ptw-hero-sub {
        font-size: 1rem;
    }

    .ptw-upload-zone {
        padding: 32px 16px;
    }

    .ptw-features-grid {
        grid-template-columns: 1fr;
    }

    .ptw-steps {
        flex-direction: column;
        gap: 24px;
    }

    .ptw-step-arrow {
        transform: rotate(90deg);
    }

    .ptw-step {
        flex: 0 1 auto;
    }

    .ptw-footer-inner {
        flex-direction: column;
        text-align: center;
    }

    .ptw-nav {
        padding: 0 12px;
    }

    .ptw-btn-convert {
        font-size: 1rem;
        padding: 14px 24px;
    }

    .ptw-page h1 {
        font-size: 1.6rem;
    }

    .ptw-features > h2,
    .ptw-how-it-works > h2,
    .ptw-faq > h2 {
        font-size: 1.5rem;
    }
}

/* Small mobile */
@media (max-width: 380px) {
    .ptw-hero h1 {
        font-size: 1.5rem;
    }

    .ptw-nav-links {
        gap: 12px;
    }

    .ptw-nav-link {
        font-size: 0.85rem;
    }
}