/* ==========================================
   WARM ACADEMIC THEME - Simran Khanuja
   Professional yet cozy color palette
   ========================================== */

/* CSS Variables for easy customization */
:root {
    /* Warm color palette */
    --primary-bg: #FFFCF7;           /* Warm off-white */
    --secondary-bg: #FFF8F0;          /* Cream */
    --card-bg: #FFFFFF;               /* White cards */
    --accent-warm: #C4704B;           /* Terracotta/rust */
    --accent-gold: #B8860B;           /* Dark golden */
    --accent-sage: #7A9E7E;           /* Muted sage green */

    /* Text colors */
    --text-primary: #2D2A26;          /* Warm dark brown */
    --text-secondary: #5C574F;        /* Medium brown */
    --text-muted: #8B8580;            /* Light brown */
    --text-link: #9E5A3C;             /* Warm link color */
    --text-link-hover: #C4704B;       /* Hover state */

    /* Borders and shadows */
    --border-light: #EDE8E0;          /* Warm light border */
    --border-medium: #D9D2C7;         /* Medium border */
    --shadow-soft: rgba(45, 42, 38, 0.06);
    --shadow-medium: rgba(45, 42, 38, 0.1);

    /* Typography */
    --font-primary: 'Source Sans Pro', 'Segoe UI', sans-serif;
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --section-gap: 4rem;
    --card-padding: 1.5rem;
    --border-radius: 12px;
    --border-radius-sm: 8px;
}

/* ==========================================
   BASE STYLES
   ========================================== */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-secondary);
    background-color: var(--primary-bg);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================
   TYPOGRAPHY
   ========================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.3;
    margin-top: 0;
}

.name {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.header {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-warm);
    display: inline-block;
}

p {
    margin-bottom: 1rem;
}

/* ==========================================
   LINKS
   ========================================== */
a {
    color: var(--text-link);
    text-decoration: none;
    transition: all 0.2s ease;
}

a:hover {
    color: var(--text-link-hover);
    text-decoration: none;
}

.in-text {
    color: var(--text-link);
    border-bottom: 1px dotted var(--text-link);
}

.in-text:hover {
    color: var(--text-link-hover);
    border-bottom-color: var(--text-link-hover);
}

/* ==========================================
   LAYOUT - SIDEBAR
   ========================================== */
.sidebar {
    background: linear-gradient(180deg, var(--secondary-bg) 0%, var(--primary-bg) 100%);
    padding: 2rem;
    border-right: 1px solid var(--border-light);
    min-height: 100vh;
}

.fixed-posi {
    position: sticky;
    top: 2rem;
}

@media (min-width: 768px) {
    .fixed-posi {
        position: fixed;
        width: inherit;
        max-width: 180px;
    }
}

/* Profile picture */
.profilepic {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--card-bg);
    box-shadow: 0 4px 20px var(--shadow-medium);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
}

.profilepic:hover {
    transform: scale(1.02);
}

/* Navigation menu */
.nav-menu {
    margin-top: 2rem;
}

.menulink {
    display: block;
    padding: 0.6rem 0;
    color: var(--text-secondary);
    font-size: 1.05rem;
    font-weight: 500;
    transition: all 0.2s ease;
    position: relative;
}

.menulink:hover {
    color: var(--accent-warm);
    padding-left: 0.5rem;
}

.menulink::before {
    content: '';
    position: absolute;
    left: -1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 2px;
    background: var(--accent-warm);
    transition: width 0.2s ease;
}

.menulink:hover::before {
    width: 0.5rem;
}

/* Social links */
.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--card-bg);
    color: var(--text-secondary);
    font-size: 0.85rem;
    transition: all 0.2s ease;
    border: 1px solid var(--border-light);
}

.social-link:hover {
    background: var(--accent-warm);
    color: white;
    border-color: var(--accent-warm);
    transform: translateY(-2px);
}

/* ==========================================
   MAIN CONTENT
   ========================================== */
.main-content {
    padding: 3rem 2rem;
    max-width: 800px;
}

.about {
    font-size: 1.05rem;
    line-height: 1.8;
}

/* Section navigation */
.section-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-light);
    position: sticky;
    top: 0;
    background: var(--primary-bg);
    z-index: 100;
}

.section-nav-link {
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-sm);
    background: var(--card-bg);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid var(--border-light);
    transition: all 0.2s ease;
}

.section-nav-link:hover,
.section-nav-link.active {
    background: var(--accent-warm);
    color: white;
    border-color: var(--accent-warm);
}

/* ==========================================
   SECTIONS
   ========================================== */
section {
    margin-bottom: var(--section-gap);
    scroll-margin-top: 5rem;
}

/* ==========================================
   UPDATES SECTION
   ========================================== */
.updates-container {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-light);
    max-height: 350px;
    overflow-y: auto;
    padding: 0.5rem;
}

.updates-container::-webkit-scrollbar {
    width: 6px;
}

.updates-container::-webkit-scrollbar-track {
    background: var(--secondary-bg);
    border-radius: 3px;
}

.updates-container::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: 3px;
}

.updates-container::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.update-item {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    transition: background 0.2s ease;
}

.update-item:hover {
    background: var(--secondary-bg);
}

.update-date {
    font-weight: 600;
    color: var(--accent-warm);
    white-space: nowrap;
    min-width: 90px;
    font-size: 0.9rem;
}

.update-content {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ==========================================
   PUBLICATION CARDS
   ========================================== */
.publication-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: var(--card-padding);
    margin-bottom: 1.25rem;
    border: 1px solid var(--border-light);
    transition: all 0.2s ease;
    position: relative;
}

.publication-card:hover {
    border-color: var(--accent-warm);
    box-shadow: 0 4px 12px var(--shadow-soft);
    transform: translateY(-2px);
}

.publication-card.award {
    border-left: 4px solid var(--accent-gold);
}

.papertitle {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: block;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.paper-authors {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.thisauthor {
    color: var(--text-primary);
    font-weight: 600;
}

.conf {
    display: block;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.confshort {
    color: var(--accent-warm);
    font-weight: 600;
}

/* Paper links/tags */
.paper-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.75rem;
}

.tag {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-link);
    background: var(--secondary-bg);
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-light);
    transition: all 0.2s ease;
}

.tag:hover {
    background: var(--accent-warm);
    color: white;
    border-color: var(--accent-warm);
}

.tagsep {
    display: none;
}

/* Award badge */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-gold);
    background: rgba(184, 134, 11, 0.1);
    border-radius: var(--border-radius-sm);
    margin-bottom: 0.75rem;
}

.badge-sp {
    background: linear-gradient(135deg, rgba(184, 134, 11, 0.15) 0%, rgba(196, 112, 75, 0.1) 100%);
}

/* ==========================================
   AWARDS & HONORS SECTION
   ========================================== */
.awards-grid {
    display: grid;
    gap: 1rem;
}

.award-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: var(--card-padding);
    border: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    transition: all 0.2s ease;
}

.award-card:hover {
    border-color: var(--accent-gold);
    box-shadow: 0 4px 12px var(--shadow-soft);
}

.award-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.award-content h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.award-content p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
}

.award-year {
    font-size: 0.85rem;
    color: var(--accent-warm);
    font-weight: 600;
}

/* ==========================================
   TALKS SECTION
   ========================================== */
.talks-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.talk-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: var(--card-padding);
    border: 1px solid var(--border-light);
    transition: all 0.2s ease;
}

.talk-card:hover {
    border-color: var(--accent-sage);
    box-shadow: 0 4px 12px var(--shadow-soft);
}

.talk-title {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.talk-venue {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.talk-date {
    color: var(--accent-warm);
    font-size: 0.9rem;
    font-weight: 500;
}

/* ==========================================
   GRANTS SECTION
   ========================================== */
.grants-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.grant-card {
    background: linear-gradient(135deg, var(--card-bg) 0%, var(--secondary-bg) 100%);
    border-radius: var(--border-radius);
    padding: var(--card-padding);
    border: 1px solid var(--border-light);
    border-left: 4px solid var(--accent-gold);
    transition: all 0.2s ease;
}

.grant-card:hover {
    border-color: var(--accent-gold);
    box-shadow: 0 4px 12px var(--shadow-soft);
}

.grant-title {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.grant-org {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.grant-year {
    color: var(--accent-warm);
    font-weight: 600;
    font-size: 0.9rem;
}

/* ==========================================
   INSTITUTION LOGOS (if used)
   ========================================== */
.instilogo {
    height: 60px;
    filter: grayscale(20%);
    opacity: 0.8;
    transition: all 0.2s ease;
}

.instilogo:hover {
    filter: grayscale(0%);
    opacity: 1;
}

.institution {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-top: 0.5rem;
}

.years {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ==========================================
   FOOTER
   ========================================== */
footer {
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-light);
    background: var(--secondary-bg);
}

footer a {
    color: var(--text-muted);
}

footer a:hover {
    color: var(--accent-warm);
}

/* ==========================================
   RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 991px) {
    .sidebar {
        min-height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-light);
        padding: 1.5rem;
    }

    .fixed-posi {
        position: relative;
        top: 0;
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .nav-menu {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem 1rem;
        margin-top: 1rem;
    }

    .menulink {
        padding: 0.4rem 0.8rem;
    }

    .menulink::before {
        display: none;
    }

    .menulink:hover {
        padding-left: 0.8rem;
    }

    .main-content {
        padding: 2rem 1rem;
    }

    .section-nav {
        justify-content: center;
    }
}

@media (max-width: 767px) {
    .name {
        font-size: 1.5rem;
        white-space: normal;
    }

    .profilepic {
        width: 120px;
        height: 120px;
    }

    .header {
        font-size: 1.2rem;
    }

    .publication-card {
        padding: 1rem;
    }

    .papertitle {
        font-size: 0.95rem;
    }

    .section-nav {
        gap: 0.5rem;
        padding: 0.75rem 0;
        overflow-x: auto;
        flex-wrap: nowrap;
        justify-content: flex-start;
        -webkit-overflow-scrolling: touch;
    }

    .section-nav-link {
        padding: 0.35rem 0.6rem;
        font-size: 0.8rem;
        flex-shrink: 0;
    }

    .update-item {
        flex-direction: column;
        gap: 0.25rem;
    }

    .update-date {
        min-width: auto;
    }

    .award-card {
        flex-direction: column;
        text-align: center;
    }

    .award-icon {
        margin-bottom: 0.5rem;
    }

    .paper-links {
        gap: 0.4rem;
    }

    .tag {
        padding: 0.3rem 0.6rem;
        font-size: 0.75rem;
    }

    .about {
        font-size: 0.95rem;
    }

    .paper-authors {
        font-size: 0.85rem;
    }

    .conf {
        font-size: 0.8rem;
    }

    .talk-venue {
        font-size: 0.85rem;
    }

    .menulink {
        font-size: 0.9rem;
        padding: 0.3rem 0.6rem;
    }
}

/* Extra small phones */
@media (max-width: 375px) {
    .name {
        font-size: 1.3rem;
    }

    .profilepic {
        width: 100px;
        height: 100px;
    }

    .section-nav-link {
        padding: 0.3rem 0.5rem;
        font-size: 0.75rem;
    }

    .publication-card,
    .award-card,
    .talk-card,
    .grant-card {
        padding: 0.85rem;
    }
}

/* ==========================================
   ANIMATIONS
   ========================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.publication-card,
.award-card,
.talk-card,
.grant-card {
    animation: fadeIn 0.4s ease forwards;
}

/* Stagger animation for cards */
.publication-card:nth-child(1) { animation-delay: 0.05s; }
.publication-card:nth-child(2) { animation-delay: 0.1s; }
.publication-card:nth-child(3) { animation-delay: 0.15s; }
.publication-card:nth-child(4) { animation-delay: 0.2s; }
.publication-card:nth-child(5) { animation-delay: 0.25s; }

/* ==========================================
   UTILITY CLASSES
   ========================================== */
.pt-section {
    padding-top: var(--section-gap);
}

.mb-sm {
    margin-bottom: 0.5rem;
}

.mb-md {
    margin-bottom: 1rem;
}

.mb-lg {
    margin-bottom: 2rem;
}

.text-muted {
    color: var(--text-muted);
}

.text-accent {
    color: var(--accent-warm);
}

/* For old classes compatibility */
.paper {
    border-left: none;
}

.noter {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.menur {
    margin-top: 1.5rem;
}