/* ============================================
   TandPay Blog — Shared Styles
   Matches landing page design language
   ============================================ */

:root {
    --primary: #0D7377;
    --primary-dark: #095456;
    --primary-light: #e6f4f4;
    --secondary: #F5A623;
    --secondary-light: #FFF3DC;
    --success: #2ECC71;
    --error: #E74C3C;
    --dark: #1A1A2E;
    --dark-light: #2D2D44;
    --gray-900: #1a1a2e;
    --gray-700: #4a4a5a;
    --gray-500: #7a7a8a;
    --gray-300: #c4c4d0;
    --gray-100: #f0f0f5;
    --white: #ffffff;
    --off-white: #FAFAFA;
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 48px rgba(0, 0, 0, 0.08);
    --radius-sm: 12px;
    --radius-md: 18px;
    --radius-lg: 28px;
}

/* RESET */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif; color: var(--dark); background: var(--white); line-height: 1.7; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }

/* NAVBAR */
.blog-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-100);
    padding: 16px 24px;
}
.blog-nav .nav-inner {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.blog-nav .logo {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--dark);
}
.blog-nav .logo span { color: var(--secondary); }
.blog-nav .nav-links { display: flex; gap: 24px; align-items: center; }
.blog-nav .nav-links a {
    font-size: 0.9rem;
    color: var(--gray-700);
    font-weight: 500;
    transition: color 0.2s;
}
.blog-nav .nav-links a:hover { color: var(--primary); }
.btn-nav {
    background: var(--primary);
    color: var(--white) !important;
    padding: 8px 20px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.85rem;
    transition: background 0.2s;
}
.btn-nav:hover { background: var(--primary-dark); }

/* BLOG LISTING PAGE */
.blog-hero {
    padding: 80px 24px 40px;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--white) 100%);
}
.blog-hero h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 12px;
}
.blog-hero p {
    font-size: 1.1rem;
    color: var(--gray-700);
    max-width: 600px;
    margin: 0 auto;
}
.blog-grid {
    max-width: 900px;
    margin: 0 auto;
    padding: 48px 24px 80px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
}
.blog-card {
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s, box-shadow 0.2s;
}
.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}
.blog-card-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background: var(--primary-light);
}
.blog-card-body { padding: 20px; }
.blog-card-tag {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--primary);
    background: var(--primary-light);
    padding: 3px 10px;
    border-radius: 100px;
    margin-bottom: 10px;
}
.blog-card-tag.rw {
    color: var(--secondary);
    background: var(--secondary-light);
}
.blog-card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--dark);
    line-height: 1.4;
    margin-bottom: 8px;
}
.blog-card-desc {
    font-size: 0.88rem;
    color: var(--gray-700);
    line-height: 1.5;
    margin-bottom: 12px;
}
.blog-card-meta {
    font-size: 0.78rem;
    color: var(--gray-500);
}

/* ARTICLE PAGE */
.article-header {
    padding: 80px 24px 40px;
    text-align: center;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--white) 100%);
}
.article-header .tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--primary);
    background: rgba(13, 115, 119, 0.1);
    padding: 4px 14px;
    border-radius: 100px;
    margin-bottom: 16px;
}
.article-header .tag.rw {
    color: var(--secondary);
    background: rgba(245, 166, 35, 0.1);
}
.article-header h1 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    color: var(--dark);
    max-width: 750px;
    margin: 0 auto 16px;
    line-height: 1.25;
}
.article-header .meta {
    font-size: 0.9rem;
    color: var(--gray-500);
}
.article-header .meta a { color: var(--primary); font-weight: 600; }

/* ARTICLE HERO IMAGE */
.article-hero-img {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}
.article-hero-img img {
    width: 100%;
    aspect-ratio: 1200 / 670;
    object-fit: cover;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    margin-top: -20px;
}

/* ARTICLE BODY */
.article-body {
    max-width: 720px;
    margin: 0 auto;
    padding: 48px 24px 80px;
}
.article-body h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    margin: 40px 0 16px;
    padding-top: 16px;
}
.article-body h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--dark);
    margin: 32px 0 12px;
}
.article-body p {
    font-size: 1.05rem;
    color: var(--gray-700);
    margin-bottom: 20px;
    line-height: 1.8;
}
.article-body ul, .article-body ol {
    margin: 0 0 20px 24px;
    color: var(--gray-700);
    font-size: 1.05rem;
    line-height: 1.8;
}
.article-body li { margin-bottom: 8px; }
.article-body strong { color: var(--dark); }
.article-body a {
    color: var(--primary);
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 3px;
}
.article-body a:hover { color: var(--primary-dark); }
.article-body blockquote {
    border-left: 4px solid var(--primary);
    background: var(--primary-light);
    padding: 20px 24px;
    margin: 24px 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    color: var(--gray-700);
}
.article-body img {
    width: 100%;
    border-radius: var(--radius-sm);
    margin: 24px 0;
    box-shadow: var(--shadow-md);
}
.article-body .img-caption {
    text-align: center;
    font-size: 0.85rem;
    color: var(--gray-500);
    margin-top: -16px;
    margin-bottom: 24px;
}

/* CALLOUT BOX */
.callout {
    background: var(--primary-light);
    border: 1px solid rgba(13, 115, 119, 0.15);
    border-radius: var(--radius-sm);
    padding: 24px;
    margin: 28px 0;
}
.callout.warning {
    background: var(--secondary-light);
    border-color: rgba(245, 166, 35, 0.2);
}
.callout.danger {
    background: #fef2f2;
    border-color: rgba(231, 76, 60, 0.15);
}
.callout h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--dark);
}
.callout p { margin-bottom: 0; font-size: 0.95rem; }

/* STATS BOX */
.stat-box {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
    margin: 28px 0;
}
.stat-item {
    background: var(--white);
    border: 1px solid var(--gray-100);
    border-radius: var(--radius-sm);
    padding: 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
}
.stat-item .number {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary);
    display: block;
}
.stat-item .label {
    font-size: 0.8rem;
    color: var(--gray-500);
    margin-top: 4px;
}

/* CTA SECTION */
.article-cta {
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
    border-radius: var(--radius-md);
    padding: 40px;
    text-align: center;
    margin: 48px 0;
}
.article-cta h3 {
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 12px;
}
.article-cta p {
    color: var(--gray-300);
    margin-bottom: 24px;
}
.article-cta .btn-cta {
    display: inline-block;
    background: var(--secondary);
    color: var(--dark);
    padding: 14px 32px;
    border-radius: 100px;
    font-weight: 700;
    font-size: 1rem;
    transition: transform 0.2s;
}
.article-cta .btn-cta:hover { transform: scale(1.05); }

/* RELATED POSTS */
.related-posts {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 24px 80px;
}
.related-posts h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 20px;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
}

/* FOOTER */
.blog-footer {
    background: var(--dark);
    color: var(--gray-300);
    padding: 40px 24px;
    text-align: center;
    font-size: 0.85rem;
}
.blog-footer a { color: var(--secondary); }
.blog-footer .footer-links {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

/* RESPONSIVE — Tablet */
@media (max-width: 768px) {
    .blog-nav .nav-links a:not(.btn-nav) { display: none; }
    .blog-grid { grid-template-columns: 1fr; padding: 32px 16px 60px; }
    .blog-hero { padding: 60px 16px 32px; }
    .blog-hero h1 { font-size: 1.75rem; }
    .article-header { padding: 60px 16px 32px; }
    .article-header h1 { font-size: 1.5rem; }
    .article-body { padding: 32px 16px 60px; }
    .article-body h2 { font-size: 1.25rem; }
    .article-body p, .article-body ul, .article-body ol { font-size: 0.95rem; }
    .article-cta { padding: 28px 20px; }
    .article-cta h3 { font-size: 1.25rem; }
    .stat-box { grid-template-columns: repeat(2, 1fr); }
    .related-posts { padding: 0 16px 60px; }
    .related-grid { grid-template-columns: 1fr; }
}

/* Small phones */
@media (max-width: 480px) {
    .blog-hero h1 { font-size: 1.5rem; }
    .article-header h1 { font-size: 1.3rem; }
    .stat-box { grid-template-columns: 1fr; }
    .blog-card-img { height: 150px; }
}