/* ==========================================================================
   Sandip Paudel: Personal Academic Website
   Stylesheet organized in numbered sections. Use VS Code's outline view
   (Ctrl+Shift+O) to jump between sections.

   Sections:
     1. Design tokens (colors, spacing, typography)
     2. Base reset and typography
     3. Layout helpers (container, section, grid)
     4. Header and navigation
     5. Hero
     6. About
     7. Education timeline
     8. Publications and working papers
     9. Conferences and training
    10. Contact form
    11. Footer
    12. Reveal animations
    13. Responsive breakpoints
    14. Print styles
   ========================================================================== */


/* ==========================================================================
   1. DESIGN TOKENS
   Edit colors and spacing here once; they cascade everywhere.
   ========================================================================== */
:root {
    /* Brand colors. Navy is primary; everything else is grayscale. */
    --navy:         #0a2540;
    --navy-700:     #143a64;
    --navy-50:      #eef2f7;

    --white:        #ffffff;
    --off-white:    #fafafa;
    --bg-alt:       #f6f7f9;

    --gray-900:     #111827;
    --gray-800:     #1f2937;
    --gray-700:     #374151;
    --gray-600:     #4b5563;
    --gray-500:     #6b7280;
    --gray-400:     #9ca3af;
    --gray-300:     #d1d5db;
    --gray-200:     #e5e7eb;
    --gray-100:     #f3f4f6;

    /* Subtle status colors (used sparingly on badges). */
    --status-amber:  #b45309;
    --status-amber-bg: #fef3c7;
    --status-blue:   #1e40af;
    --status-blue-bg: #dbeafe;
    --status-green:  #065f46;
    --status-green-bg: #d1fae5;

    /* Typography */
    --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Lora', Georgia, 'Times New Roman', serif;

    /* Spacing scale (rem). Multiply where needed. */
    --space-1:  0.25rem;
    --space-2:  0.5rem;
    --space-3:  0.75rem;
    --space-4:  1rem;
    --space-5:  1.5rem;
    --space-6:  2rem;
    --space-7:  2.5rem;
    --space-8:  3rem;
    --space-10: 4rem;
    --space-12: 6rem;

    /* Layout */
    --container-max: 1140px;
    --container-narrow: 800px;

    /* Radii and shadows */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --shadow-sm: 0 1px 2px rgba(10, 37, 64, 0.04), 0 1px 3px rgba(10, 37, 64, 0.06);
    --shadow-md: 0 4px 12px rgba(10, 37, 64, 0.06), 0 2px 4px rgba(10, 37, 64, 0.04);

    /* Motion */
    --ease: cubic-bezier(0.22, 1, 0.36, 1);
    --duration: 0.25s;
}


/* ==========================================================================
   2. BASE RESET AND TYPOGRAPHY
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* offsets sticky header when jumping to anchors */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.65;
    color: var(--gray-700);
    background: var(--white);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    color: var(--navy);
    line-height: 1.25;
    font-weight: 600;
    letter-spacing: -0.01em;
}

p {
    color: var(--gray-700);
}

a {
    color: var(--navy);
    text-decoration: none;
    transition: color var(--duration) var(--ease);
}
a:hover,
a:focus-visible {
    color: var(--navy-700);
    text-decoration: underline;
    text-underline-offset: 3px;
}

img {
    max-width: 100%;
    display: block;
}

ul, ol {
    list-style: none;
}

button {
    font: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

::selection {
    background: var(--navy);
    color: var(--white);
}

/* Focus ring for keyboard users. */
:focus-visible {
    outline: 2px solid var(--navy);
    outline-offset: 2px;
    border-radius: 2px;
}


/* ==========================================================================
   3. LAYOUT HELPERS
   ========================================================================== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-5);
}

.container.narrow,
.container .narrow {
    max-width: var(--container-narrow);
}

.section {
    padding: var(--space-12) 0;
    border-bottom: 1px solid var(--gray-200);
}
.section:last-of-type {
    border-bottom: none;
}

.section-alt {
    background: var(--bg-alt);
}

.section-header {
    margin-bottom: var(--space-8);
}

.section-kicker {
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--gray-500);
    margin-bottom: var(--space-3);
}

.section-title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    color: var(--navy);
    font-weight: 600;
}

.subhead {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--gray-600);
    margin: var(--space-10) 0 var(--space-5);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--gray-200);
}
.subhead:first-of-type {
    margin-top: var(--space-6);
}

.prose p + p {
    margin-top: var(--space-4);
}
.prose p {
    font-size: 1.05rem;
    color: var(--gray-700);
}

.eyebrow {
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--navy-700);
}


/* ==========================================================================
   4. HEADER AND NAVIGATION
   ========================================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--duration) var(--ease), background var(--duration) var(--ease);
}

.site-header.scrolled {
    border-bottom-color: var(--gray-200);
    background: rgba(255, 255, 255, 0.95);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--navy);
    text-decoration: none;
    font-weight: 600;
}
.brand:hover { text-decoration: none; color: var(--navy); }

.brand-mark {
    width: 36px;
    height: 36px;
    background: var(--navy);
    color: var(--white);
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 0.95rem;
    font-weight: 600;
}

.brand-name {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    color: var(--navy);
}

.primary-nav .nav-list {
    display: flex;
    gap: var(--space-2);
    align-items: center;
}

.primary-nav a {
    display: inline-block;
    padding: 0.5rem 0.85rem;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--gray-700);
    border-radius: var(--radius-sm);
    transition: background var(--duration) var(--ease), color var(--duration) var(--ease);
}
.primary-nav a:hover,
.primary-nav a:focus-visible {
    color: var(--navy);
    background: var(--navy-50);
    text-decoration: none;
}
.primary-nav a.active {
    color: var(--navy);
    background: var(--navy-50);
}

.nav-toggle {
    display: none;
    width: 36px;
    height: 36px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    padding: 0;
    background: transparent;
}
.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--navy);
    border-radius: 2px;
    transition: transform var(--duration) var(--ease), opacity var(--duration) var(--ease);
}
.nav-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}
.nav-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}


/* ==========================================================================
   5. HERO
   ========================================================================== */
.hero {
    padding: var(--space-12) 0 var(--space-10);
    background: var(--white);
    overflow: hidden;
    position: relative;
}

.hero::before {
    /* very subtle radial accent in the corner */
    content: '';
    position: absolute;
    top: -10%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--navy-50) 0%, transparent 60%);
    pointer-events: none;
    z-index: 0;
}

.hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: var(--space-10);
    align-items: center;
}

.hero-text { max-width: 580px; }

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 5.5vw, 4rem);
    font-weight: 600;
    color: var(--navy);
    margin: var(--space-3) 0 var(--space-4);
    letter-spacing: -0.025em;
    line-height: 1.05;
}

.hero-affiliations {
    font-size: 1.05rem;
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: var(--space-5);
}

.hero-summary {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    line-height: 1.7;
    color: var(--gray-700);
    margin-bottom: var(--space-6);
    max-width: 540px;
}

.hero-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.icon-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.1rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--navy);
    background: var(--white);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    transition: all var(--duration) var(--ease);
}
.icon-link:hover {
    background: var(--navy);
    color: var(--white);
    border-color: var(--navy);
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}
.icon-link i { font-size: 1rem; }

.hero-photo {
    display: flex;
    justify-content: center;
}
.hero-photo img {
    width: 100%;
    max-width: 340px;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
}


/* ==========================================================================
   6. ABOUT
   ========================================================================== */
.interest-list {
    display: grid;
    gap: var(--space-3);
    margin-bottom: var(--space-8);
}

.interest-list li {
    padding: var(--space-4) var(--space-5);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-left: 3px solid var(--navy);
    border-radius: var(--radius-md);
    font-size: 0.98rem;
    line-height: 1.65;
    color: var(--gray-700);
    transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}
.interest-list li:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}
.interest-list li strong {
    color: var(--navy);
    font-weight: 600;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-5);
    margin-top: var(--space-8);
}

.stat {
    padding: var(--space-5);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    text-align: left;
}

.stat-number {
    font-family: var(--font-serif);
    font-size: 2.25rem;
    font-weight: 600;
    color: var(--navy);
    line-height: 1;
    margin-bottom: var(--space-2);
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--gray-500);
    font-weight: 500;
}


/* ==========================================================================
   7. EDUCATION TIMELINE
   ========================================================================== */
.timeline {
    position: relative;
    padding-left: var(--space-7);
    border-left: 2px solid var(--gray-200);
}

.timeline-item {
    position: relative;
    padding-bottom: var(--space-7);
}
.timeline-item:last-child { padding-bottom: 0; }

.timeline-item::before {
    content: '';
    position: absolute;
    left: calc(-1 * var(--space-7) - 1px);
    top: 4px;
    width: 12px;
    height: 12px;
    background: var(--white);
    border: 2px solid var(--navy);
    border-radius: 50%;
    transform: translateX(-50%);
}
.timeline-item:first-child::before {
    background: var(--navy);
}

.timeline-meta {
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-500);
    margin-bottom: var(--space-2);
}

.timeline-body h3 {
    font-size: 1.2rem;
    color: var(--navy);
    margin-bottom: var(--space-1);
    font-family: var(--font-serif);
}

.institution {
    font-size: 0.95rem;
    color: var(--gray-700);
    margin: 0.25rem 0;
}

.detail {
    font-size: 0.9rem;
    color: var(--gray-500);
    font-style: italic;
}


/* ==========================================================================
   8. PUBLICATIONS AND WORKING PAPERS
   ========================================================================== */
.pub-list {
    display: grid;
    gap: var(--space-4);
}
.pub-list.plain { gap: var(--space-3); }

.pub-item {
    padding: var(--space-5) var(--space-6);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    transition: border-color var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}
.pub-item:hover {
    border-color: var(--gray-300);
    box-shadow: var(--shadow-sm);
}

.pub-year {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--navy);
    background: var(--navy-50);
    padding: 0.25rem 0.7rem;
    border-radius: var(--radius-sm);
    letter-spacing: 0.02em;
    margin-bottom: var(--space-3);
}

.pub-citation {
    font-family: var(--font-serif);
    font-size: 1rem;
    line-height: 1.65;
    color: var(--gray-800);
    margin-bottom: var(--space-2);
}
.pub-citation em {
    color: var(--navy);
    font-style: italic;
    font-weight: 500;
}

.pub-doi {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.82rem;
    color: var(--gray-500);
    margin-top: var(--space-2);
    word-break: break-all;
}
.pub-doi:hover { color: var(--navy); }

/* Status pills for working papers */
.status {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0.3rem 0.7rem;
    border-radius: 999px;
    margin-bottom: var(--space-3);
}
.status.under-review {
    background: var(--status-amber-bg);
    color: var(--status-amber);
}
.status.revising {
    background: var(--status-blue-bg);
    color: var(--status-blue);
}
.status.in-progress {
    background: var(--status-green-bg);
    color: var(--status-green);
}


/* ==========================================================================
   9. CONFERENCES AND TRAINING
   ========================================================================== */
.conf-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--space-5);
}

.conf-card {
    padding: var(--space-5) var(--space-6);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    transition: transform var(--duration) var(--ease), box-shadow var(--duration) var(--ease), border-color var(--duration) var(--ease);
    position: relative;
}
.conf-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
    border-color: var(--gray-300);
}
.conf-card.highlight {
    border-color: var(--navy);
    background: linear-gradient(180deg, var(--navy-50) 0%, var(--white) 30%);
}

.conf-date {
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-500);
    margin-bottom: var(--space-3);
}

.conf-award {
    display: inline-block;
    font-family: var(--font-sans);
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--navy);
    background: var(--white);
    border: 1px solid var(--navy);
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-3);
}

.conf-paper {
    font-family: var(--font-serif);
    font-size: 1.02rem;
    color: var(--navy);
    line-height: 1.4;
    margin-bottom: var(--space-3);
    font-weight: 600;
}

.conf-venue {
    font-size: 0.88rem;
    color: var(--gray-600);
    line-height: 1.55;
}

.see-more {
    text-align: center;
    margin-top: var(--space-6);
    font-size: 0.95rem;
    color: var(--gray-600);
}

.training-list {
    display: grid;
    gap: var(--space-3);
}

.training-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--space-5);
    align-items: start;
    padding: var(--space-4) var(--space-5);
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
}

.training-date {
    font-family: var(--font-sans);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--gray-500);
    letter-spacing: 0.02em;
    padding-top: 2px;
}

.training-body h4 {
    font-family: var(--font-serif);
    font-size: 1rem;
    color: var(--navy);
    margin-bottom: var(--space-1);
    font-weight: 600;
}

.training-body p {
    font-size: 0.9rem;
    color: var(--gray-600);
    line-height: 1.55;
}


/* ==========================================================================
   10. CONTACT FORM
   ========================================================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-8);
    align-items: start;
}

.contact-info .prose p {
    font-size: 1rem;
    color: var(--gray-700);
}

.contact-list {
    margin-top: var(--space-6);
    display: grid;
    gap: var(--space-5);
}

.contact-list li {
    display: grid;
    grid-template-columns: 32px 1fr;
    gap: var(--space-3);
    align-items: start;
}

.contact-list i {
    color: var(--navy);
    font-size: 1rem;
    width: 32px;
    height: 32px;
    background: var(--navy-50);
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.contact-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray-500);
    margin-bottom: 2px;
}

.contact-list a {
    color: var(--gray-800);
    font-weight: 500;
}
.contact-list a:hover { color: var(--navy); }

/* Form */
.contact-form {
    background: var(--white);
    padding: var(--space-7);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.form-row {
    margin-bottom: var(--space-4);
}

.form-row label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: var(--space-2);
    letter-spacing: 0.01em;
}

.form-row input,
.form-row textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font: inherit;
    font-size: 0.95rem;
    color: var(--gray-900);
    background: var(--off-white);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-md);
    transition: border-color var(--duration) var(--ease), box-shadow var(--duration) var(--ease), background var(--duration) var(--ease);
}

.form-row input:focus,
.form-row textarea:focus {
    outline: none;
    border-color: var(--navy);
    background: var(--white);
    box-shadow: 0 0 0 3px var(--navy-50);
}

.form-row textarea {
    resize: vertical;
    font-family: var(--font-sans);
    min-height: 120px;
}

.btn-submit {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: 0.85rem 1.5rem;
    background: var(--navy);
    color: var(--white);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: background var(--duration) var(--ease), transform var(--duration) var(--ease);
    font-size: 0.95rem;
}
.btn-submit:hover {
    background: var(--navy-700);
    transform: translateY(-1px);
}
.btn-submit i { font-size: 0.85rem; }

.form-status {
    margin-top: var(--space-4);
    font-size: 0.9rem;
    min-height: 1.4em;
}
.form-status.success { color: var(--status-green); }
.form-status.error   { color: var(--status-amber); }


/* ==========================================================================
   11. FOOTER
   ========================================================================== */
.site-footer {
    background: var(--navy);
    color: var(--gray-300);
    padding: var(--space-8) 0 var(--space-6);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-6);
    align-items: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}
.footer-brand .brand-mark {
    background: var(--white);
    color: var(--navy);
}

.footer-name {
    font-family: var(--font-serif);
    color: var(--white);
    font-size: 1rem;
    font-weight: 600;
}
.footer-role {
    font-size: 0.82rem;
    color: var(--gray-400);
    margin-top: 2px;
}

.footer-links {
    display: flex;
    gap: var(--space-5);
    justify-content: center;
}
.footer-links a {
    color: var(--gray-300);
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}
.footer-links a:hover {
    color: var(--white);
    text-decoration: none;
}

.footer-meta {
    text-align: right;
    font-size: 0.82rem;
    color: var(--gray-400);
}
.footer-meta p { color: var(--gray-400); margin: 2px 0; }
.footer-meta a { color: var(--gray-300); }
.footer-meta a:hover { color: var(--white); text-decoration: underline; }


/* ==========================================================================
   12. REVEAL ANIMATIONS
   Triggered by IntersectionObserver in main.js
   ========================================================================== */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Respect user preference for reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    .reveal { opacity: 1; transform: none; }
}


/* ==========================================================================
   13. RESPONSIVE BREAKPOINTS
   Mobile-first overrides applied at narrower widths.
   ========================================================================== */

/* Tablet and below */
@media (max-width: 960px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
        text-align: center;
    }
    .hero-text { margin: 0 auto; }
    .hero-summary { margin-left: auto; margin-right: auto; }
    .hero-links { justify-content: center; }
    .hero-photo { order: -1; }
    .hero-photo img { max-width: 240px; }

    .stats-grid { grid-template-columns: repeat(2, 1fr); }

    .contact-grid { grid-template-columns: 1fr; gap: var(--space-7); }

    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .footer-brand { justify-content: center; }
    .footer-meta { text-align: center; }
}

/* Mobile */
@media (max-width: 720px) {
    .section { padding: var(--space-10) 0; }

    .nav-toggle { display: flex; }

    .primary-nav {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        border-bottom: 1px solid var(--gray-200);
        padding: var(--space-3) var(--space-5);
        transform: translateY(-110%);
        transition: transform var(--duration) var(--ease);
        box-shadow: var(--shadow-md);
    }
    .primary-nav.open {
        transform: translateY(0);
    }
    .primary-nav .nav-list {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
    }
    .primary-nav a {
        display: block;
        padding: 0.85rem 1rem;
        border-radius: var(--radius-sm);
    }

    .hero { padding: var(--space-8) 0 var(--space-7); }
    .hero-photo img { max-width: 200px; }

    .training-item {
        grid-template-columns: 1fr;
        gap: var(--space-2);
    }
    .training-date { padding-top: 0; }

    .contact-form { padding: var(--space-5); }
}

/* Small phones */
@media (max-width: 480px) {
    .container { padding: 0 var(--space-4); }
    .stats-grid { grid-template-columns: 1fr 1fr; gap: var(--space-3); }
    .stat { padding: var(--space-4); }
    .stat-number { font-size: 1.85rem; }
    .pub-item, .conf-card { padding: var(--space-4); }
    .brand-name { display: none; }
}


/* ==========================================================================
   14. PRINT STYLES
   Clean output when printed or saved as PDF.
   ========================================================================== */
@media print {
    .site-header, .site-footer, .nav-toggle,
    .contact-form, .hero-links { display: none; }

    body { color: #000; background: #fff; font-size: 11pt; }
    .section { padding: 1rem 0; border: none; page-break-inside: avoid; }
    .hero { padding: 1rem 0; }
    .hero::before { display: none; }
    .pub-item, .conf-card, .training-item, .interest-list li, .stat, .timeline-item {
        background: #fff;
        border: 1px solid #ccc;
        box-shadow: none;
    }
    a { color: #000; text-decoration: underline; }
}