/* ============================================
   DILIP ASTIK - Independent AI Investment Risk Assessor
   Website Stylesheet v3.0 - Refined Governance Aesthetic
   Design Philosophy: "Polished annual report, not marketing site"
   ============================================ */

/* CSS Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* Typography - Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;450;500;600&family=Source+Serif+4:ital,opsz,wght@0,8..60,300;0,8..60,400;0,8..60,500;0,8..60,600;1,8..60,400&display=swap');

:root {
    /* Colors - Refined palette */
    --bg-primary: #FAFAF8;
    --bg-header: #FFFFFF;
    --bg-section-alt: #F5F4F1;
    --bg-accent: #F0EFEB;
    --bg-card: #FFFFFF;
    --bg-dark: #1A1A1A;
    
    --text-primary: #1A1A1A;
    --text-secondary: #4A4A4A;
    --text-muted: #6B6B6B;
    --text-light: #8A8A8A;
    --text-inverse: #FAFAF8;
    
    --border-color: #D4D4D0;
    --border-light: #E5E4E0;
    --border-subtle: #ECECEA;
    
    --accent-warm: #8B7355;
    --accent-dark: #5C4D3C;
    --accent-light: #A89080;
    
    /* Typography */
    --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2.5rem;
    --space-xl: 4rem;
    --space-xxl: 6rem;
    
    /* Layout */
    --max-width: 740px;
    --max-width-wide: 920px;
    --content-padding: 2rem;
    
    /* Shadows */
    --shadow-subtle: 0 1px 3px rgba(0,0,0,0.04);
    --shadow-soft: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-medium: 0 4px 16px rgba(0,0,0,0.08);
}

/* Base Styles */
html {
    font-size: 18px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.75;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Layout Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--content-padding);
}

.container-wide {
    max-width: var(--max-width-wide);
    margin: 0 auto;
    padding: 0 var(--content-padding);
}

/* ============================================
   HEADER - Refined & Authoritative
   ============================================ */

header {
    background: var(--bg-header);
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-subtle);
}

.header-inner {
    max-width: var(--max-width-wide);
    margin: 0 auto;
    padding: 0 var(--content-padding);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.1rem 0;
}

.site-identity {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.site-title {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
    line-height: 1.2;
    border-bottom: none;
}

.site-title:hover {
    color: var(--accent-dark);
    border-bottom: none;
}

.site-tagline {
    font-family: var(--font-sans);
    font-size: 0.65rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.2rem;
}

nav a {
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 450;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.45rem 0.7rem;
    border-radius: 4px;
    border-bottom: none;
    transition: all 0.15s ease;
}

nav a:hover {
    color: var(--text-primary);
    background-color: var(--bg-section-alt);
    border-bottom: none;
}

nav a.active {
    color: var(--text-primary);
    font-weight: 550;
    background-color: var(--bg-section-alt);
}

/* ============================================
   HERO SECTION - Strong Above-Fold
   ============================================ */

.hero {
    background: linear-gradient(to bottom, var(--bg-header) 0%, var(--bg-primary) 100%);
    padding: var(--space-xl) 0 var(--space-lg);
    border-bottom: 1px solid var(--border-subtle);
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--content-padding);
}

.hero-label {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-warm);
    margin-bottom: var(--space-sm);
}

.hero h1 {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 500;
    line-height: 1.3;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
    max-width: 22ch;
}

.hero-subtitle {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 400;
    line-height: 1.6;
    color: var(--text-secondary);
    max-width: 52ch;
    margin-bottom: var(--space-lg);
}

.hero-cta {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
    align-items: center;
}

/* ============================================
   PAGE HEADER - For Interior Pages
   ============================================ */

.page-header {
    background: linear-gradient(to bottom, var(--bg-header) 0%, var(--bg-primary) 100%);
    padding: var(--space-xl) 0 var(--space-lg);
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: var(--space-xl);
}

.page-header h1 {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.025em;
}

.page-header .subtitle {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 400;
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 0;
}

.page-header .credentials {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 450;
    color: var(--text-muted);
    letter-spacing: 0.02em;
    margin-top: 0.75rem;
    margin-bottom: 0;
}

/* ============================================
   MAIN CONTENT
   ============================================ */

main {
    padding-bottom: var(--space-xxl);
}

article {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--content-padding);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1 {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 600;
    line-height: 1.25;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
    letter-spacing: -0.02em;
}

h2 {
    font-family: var(--font-serif);
    font-size: 1.45rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    letter-spacing: -0.015em;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

h3 {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-primary);
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}

h4 {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}

p {
    margin-bottom: var(--space-md);
    max-width: 65ch;
}

.lead {
    font-size: 1.15rem;
    font-weight: 400;
    line-height: 1.65;
    color: var(--text-primary);
    margin-bottom: var(--space-lg);
}

/* ============================================
   LISTS
   ============================================ */

ul, ol {
    margin-bottom: var(--space-md);
    padding-left: 1.25rem;
}

li {
    margin-bottom: 0.6rem;
    max-width: 65ch;
    line-height: 1.65;
}

li::marker {
    color: var(--accent-warm);
}

/* Styled list */
ul.styled-list {
    list-style: none;
    padding-left: 0;
}

ul.styled-list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
}

ul.styled-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.6rem;
    width: 6px;
    height: 6px;
    background-color: var(--accent-warm);
    border-radius: 50%;
}

/* ============================================
   LINKS & BUTTONS
   ============================================ */

a {
    color: var(--text-primary);
    text-decoration: none;
    border-bottom: 1px solid var(--border-color);
    transition: border-color 0.15s ease;
}

a:hover {
    border-bottom-color: var(--text-primary);
}

/* Primary button */
.btn {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 550;
    padding: 0.85rem 1.6rem;
    border: 1.5px solid var(--text-primary);
    background: transparent;
    color: var(--text-primary);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    letter-spacing: 0.02em;
    border-radius: 2px;
}

.btn:hover {
    background-color: var(--text-primary);
    color: var(--bg-primary);
    border-bottom-color: var(--text-primary);
}

/* Primary filled button */
.btn-primary {
    background-color: var(--text-primary);
    color: var(--text-inverse);
    border-color: var(--text-primary);
}

.btn-primary:hover {
    background-color: var(--accent-dark);
    border-color: var(--accent-dark);
}

/* Secondary button */
.btn-secondary {
    border-color: var(--border-color);
    color: var(--text-secondary);
    font-weight: 450;
}

.btn-secondary:hover {
    background-color: var(--bg-section-alt);
    color: var(--text-primary);
    border-color: var(--border-color);
}

/* ============================================
   SECTIONS & CARDS
   ============================================ */

.section {
    margin-bottom: var(--space-xl);
}

.section:last-child {
    margin-bottom: 0;
}

/* Home sections */
.home-section {
    padding: var(--space-xl) 0;
    border-top: 1px solid var(--border-subtle);
}

.home-section h2 {
    margin-top: 0;
    border-bottom: none;
    padding-bottom: 0;
}

/* Content card */
.content-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    padding: var(--space-lg);
    margin: var(--space-lg) 0;
    box-shadow: var(--shadow-subtle);
}

.content-card h3 {
    margin-top: 0;
}

/* Highlight box */
.highlight-box {
    background: var(--bg-section-alt);
    border-left: 3px solid var(--accent-warm);
    padding: var(--space-md) var(--space-lg);
    margin: var(--space-lg) 0;
}

.highlight-box p {
    margin-bottom: 0;
    font-size: 1.02rem;
}

.highlight-box p:not(:last-child) {
    margin-bottom: var(--space-sm);
}

/* Signal boxes */
.signal-box {
    background-color: var(--bg-section-alt);
    padding: var(--space-md);
    margin: var(--space-md) 0;
    border-left: 3px solid var(--text-secondary);
}

.signal-box p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

.signal-box.emphasis {
    border-left-color: var(--accent-warm);
    background-color: #FAF8F5;
}

/* ============================================
   BLOCKQUOTES
   ============================================ */

blockquote {
    border-left: 3px solid var(--accent-warm);
    padding: var(--space-sm) var(--space-md);
    margin: var(--space-lg) 0;
    font-style: italic;
    font-size: 1.1rem;
    color: var(--text-secondary);
    background: var(--bg-section-alt);
}

blockquote p {
    margin-bottom: 0;
}

/* ============================================
   HORIZONTAL RULES
   ============================================ */

hr {
    border: none;
    border-top: 1px solid var(--border-light);
    margin: var(--space-xl) 0;
}

hr.subtle {
    border-top-color: var(--border-subtle);
    margin: var(--space-lg) 0;
}

/* ============================================
   TABLES
   ============================================ */

.table-wrapper {
    margin: var(--space-lg) 0;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.95rem;
    background: var(--bg-card);
    box-shadow: var(--shadow-subtle);
}

th, td {
    text-align: left;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-light);
    vertical-align: top;
}

th {
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    background-color: var(--bg-section-alt);
    border-bottom: 2px solid var(--border-color);
}

td {
    line-height: 1.55;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background-color: var(--bg-section-alt);
}

/* ============================================
   PORTRAIT / IMAGE
   ============================================ */

.portrait-container {
    margin: var(--space-lg) 0;
}

.portrait-image {
    width: 180px;
    height: 180px;
    object-fit: cover;
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-soft);
    filter: grayscale(15%);
}

.portrait-placeholder {
    width: 180px;
    height: 180px;
    background: linear-gradient(135deg, var(--bg-section-alt) 0%, var(--bg-accent) 100%);
    border: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    box-shadow: var(--shadow-soft);
}

.portrait-placeholder svg {
    width: 48px;
    height: 48px;
    opacity: 0.4;
}

/* ============================================
   CREDENTIALS BANNER
   ============================================ */

.credentials-banner {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md) var(--space-lg);
    padding: var(--space-md) 0;
    margin: var(--space-md) 0;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.credential-item {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.credential-item .label {
    font-family: var(--font-sans);
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-light);
}

.credential-item .value {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* ============================================
   META & LABELS
   ============================================ */

.credentials-line {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 450;
    color: var(--text-muted);
    letter-spacing: 0.02em;
    margin-bottom: var(--space-lg);
}

.meta-label {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-warm);
    margin-bottom: 0.25rem;
}

.part-header {
    font-family: var(--font-sans);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-warm);
    margin-bottom: 0.5rem;
}

/* ============================================
   OFFERING GRID (Home Page)
   ============================================ */

.offering-grid {
    display: grid;
    gap: var(--space-md);
    margin: var(--space-lg) 0;
}

.offering-item {
    display: flex;
    gap: var(--space-sm);
    align-items: flex-start;
    padding: var(--space-md);
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-subtle);
}

.offering-item .icon {
    width: 28px;
    height: 28px;
    color: var(--accent-warm);
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.offering-item .text strong {
    display: block;
    font-family: var(--font-serif);
    font-size: 1.05rem;
    margin-bottom: 0.25rem;
}

.offering-item .text span {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Principles list */
.principles-list {
    list-style: none;
    padding: 0;
    margin: var(--space-lg) 0;
}

.principles-list li {
    font-size: 1.05rem;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--border-subtle);
    color: var(--text-secondary);
}

.principles-list li:last-child {
    border-bottom: none;
}

/* ============================================
   CONTACT SECTION
   ============================================ */

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    padding: var(--space-lg) var(--space-xl);
    margin-top: var(--space-xl);
    box-shadow: var(--shadow-soft);
}

.contact-card p {
    margin-bottom: var(--space-xs);
}

.contact-card .name {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.contact-card .title {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.contact-card .email {
    margin-top: var(--space-md);
    font-size: 1rem;
}

.contact-card .email a {
    font-weight: 500;
    border-bottom-color: var(--accent-warm);
}

/* ============================================
   CTA BANNER
   ============================================ */

.cta-banner {
    background: var(--bg-section-alt);
    border: 1px solid var(--border-light);
    padding: var(--space-lg);
    margin: var(--space-xl) 0;
    text-align: center;
}

.cta-banner p {
    max-width: none;
    margin-bottom: var(--space-md);
    font-size: 1.05rem;
}

.cta-banner p:last-child {
    margin-bottom: 0;
}

/* ============================================
   ATTRIBUTION
   ============================================ */

.attribution {
    margin-top: var(--space-xl);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-light);
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.attribution p {
    margin-bottom: var(--space-xs);
}

/* ============================================
   FOOTER
   ============================================ */

footer {
    margin-top: var(--space-xxl);
    background: var(--bg-section-alt);
    border-top: 1px solid var(--border-light);
}

.footer-inner {
    max-width: var(--max-width-wide);
    margin: 0 auto;
    padding: var(--space-lg) var(--content-padding);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-lg);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.footer-brand .name {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.footer-brand .role {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.footer-meta {
    text-align: right;
}

.footer-meta .copyright {
    font-family: var(--font-sans);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-meta .credentials {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 0.25rem;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 900px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }
    
    nav {
        width: 100%;
        justify-content: flex-start;
    }
    
    .hero h1 {
        font-size: 1.9rem;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 17px;
    }
    
    :root {
        --content-padding: 1.5rem;
        --space-xl: 3rem;
        --space-xxl: 4rem;
    }
    
    .hero h1 {
        font-size: 1.75rem;
    }
    
    .page-header h1 {
        font-size: 1.85rem;
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.3rem;
    }
    
    nav a {
        padding: 0.4rem 0.6rem;
        font-size: 0.72rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .footer-meta {
        text-align: left;
    }
    
    table {
        font-size: 0.85rem;
    }
    
    th, td {
        padding: 0.75rem 1rem;
    }
    
    .portrait-image,
    .portrait-placeholder {
        width: 150px;
        height: 150px;
    }
    
    .credentials-banner {
        gap: var(--space-sm) var(--space-md);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 16px;
    }
    
    :root {
        --content-padding: 1.25rem;
    }
    
    .hero h1 {
        font-size: 1.5rem;
    }
    
    .page-header h1 {
        font-size: 1.6rem;
    }
    
    .site-title {
        font-size: 1.15rem;
    }
    
    nav {
        flex-wrap: wrap;
        gap: 0.15rem;
    }
    
    nav a {
        padding: 0.35rem 0.5rem;
        font-size: 0.68rem;
    }
    
    .offering-item {
        padding: var(--space-sm);
    }
    
    /* Stack table on mobile */
    .table-wrapper {
        margin: var(--space-md) calc(-1 * var(--content-padding));
        padding: 0 var(--content-padding);
    }
    
    table, thead, tbody, th, td, tr {
        display: block;
    }
    
    thead {
        display: none;
    }
    
    tr {
        margin-bottom: var(--space-md);
        border: 1px solid var(--border-light);
        padding: var(--space-sm);
        background: var(--bg-card);
    }
    
    td {
        border: none;
        padding: 0.5rem 0;
        position: relative;
    }
    
    td::before {
        content: attr(data-label);
        display: block;
        font-family: var(--font-sans);
        font-weight: 600;
        font-size: 0.68rem;
        text-transform: uppercase;
        letter-spacing: 0.05em;
        color: var(--text-muted);
        margin-bottom: 0.25rem;
    }
    
    tr:hover td {
        background-color: transparent;
    }
    
    .contact-card {
        padding: var(--space-md);
    }
    
    .portrait-image,
    .portrait-placeholder {
        width: 130px;
        height: 130px;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    body {
        background: white;
        font-size: 11pt;
    }
    
    header, footer {
        display: none;
    }
    
    main {
        padding: 0;
    }
    
    .hero,
    .page-header {
        background: none;
        border: none;
        padding: 0 0 1rem;
    }
    
    h1 {
        font-size: 18pt;
    }
    
    h2 {
        font-size: 14pt;
        page-break-after: avoid;
    }
    
    table {
        page-break-inside: avoid;
    }
    
    .content-card,
    .highlight-box,
    .signal-box {
        border: 1px solid #ddd;
        box-shadow: none;
    }
    
    .btn {
        display: none;
    }
}