/* 
    Dr. Anju Mathur - Personal Website 
    Premium "Best-in-Class" Remake (Mobile-First)
*/

:root {
    --primary: #3D5A56;
    --secondary: #EAF4F2;
    --accent: #8DAA9D;
    --bg-cream: #F8F7F2;
    --text-dark: #2D3A38;
    --text-light: #6B7D7A;
    --white: #FFFFFF;
    --gold: #D4AF37; /* Royal Accent */
    --glass: rgba(255, 255, 255, 0.75);
    --shadow-soft: 0 10px 40px rgba(0, 0, 0, 0.08);
    --radius: 24px;
}

/* Base Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Inter', -apple-system, sans-serif;
    background-color: var(--bg-cream);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
}

a {
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    color: inherit;
}

ul { list-style: none; }
img { max-width: 100%; display: block; }

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 5rem 0;
}

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

/* Header (Transparent to Solid) */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.4s ease;
    background-color: transparent;
}

.header.scrolled {
    background-color: rgba(61, 90, 86, 0.98);
    backdrop-filter: blur(10px);
    padding: 0.75rem 0;
    box-shadow: var(--shadow-soft);
}

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

.logo .name {
    font-family: 'Playfair Display', serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--white);
    transition: 0.3s;
}

.header.scrolled .logo .name {
    color: var(--white);
}

/* Desktop Navigation */
.nav-links {
    display: none;
    gap: 2.5rem;
}

/* Mobile Toggle Styles */
.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    width: 28px;
    height: 16px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.nav-toggle span {
    width: 100%;
    height: 2px;
    background-color: var(--white);
    transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.header.scrolled .nav-toggle span {
    background-color: var(--primary);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Menu Overlay */
@media (max-width: 767px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background: var(--primary);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        transition: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        display: flex;
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .nav-links li {
        margin: 1.5rem 0;
    }
    
    .nav-links a {
        color: var(--white) !important;
        font-size: 1.5rem;
        font-family: 'Playfair Display', serif;
    }
    
    body.no-scroll {
        overflow: hidden;
    }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9rem 1.8rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    border: none;
    cursor: pointer;
    min-height: 52px;
    letter-spacing: 0.5px;
}

.btn-primary {
    background-color: var(--accent);
    color: var(--white);
}

.btn-outline-white {
    background-color: transparent;
    border: 1.5px solid var(--white);
    color: var(--white);
}

.nav-cta .btn {
    min-height: 40px;
    padding: 0.5rem 1.2rem;
    font-size: 0.85rem;
    background-color: var(--accent);
    color: var(--white);
}

/* Immersive Hero Section */
.hero {
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.hero-container {
    z-index: 10;
    width: 100%;
}

.hero-tag {
    display: block;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--gold);
    margin-bottom: 1rem;
    font-weight: 600;
}

.hero-title {
    font-size: 2.8rem;
    line-height: 1.1;
    margin-bottom: 1rem;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.hero-tagline {
    font-size: 1.1rem;
    font-style: italic;
    opacity: 0.9;
    margin-bottom: 2.5rem;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.hero-btns {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    max-width: 300px;
    margin: 0 auto;
}

.about-grid {
    display: flex;
    flex-direction: column;
    max-width: 800px; /* Centered narrow width for premium bio reading experience */
    margin: 0 auto;
}
.section-tag {
    display: block;
    color: var(--accent);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 2.5px;
    margin-bottom: 0.8rem;
}

.section-title {
    font-size: 2.2rem;
    color: var(--primary);
    margin-bottom: 1.25rem;
    line-height: 1.2;
}

.heading-accent {
    width: 50px;
    height: 3px;
    background-color: var(--gold);
    margin-bottom: 2rem;
    border-radius: 2px;
}

.center-accent {
    margin-left: auto;
    margin-right: auto;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.section-text {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
    line-height: 1.7;
}

.section-text span {
    color: var(--primary);
    font-weight: 700;
    border-bottom: 2px solid var(--accent);
}

.text-lead {
    font-size: 1.15rem;
    color: var(--primary) !important;
    font-weight: 500;
    margin-bottom: 2rem;
}

.bio-accent {
    border-left: 3px solid var(--secondary);
    padding-left: 1.5rem;
    margin: 2rem 0;
}

/* Specialized Cards */
.spec-grid {
    display: grid;
    gap: 1.5rem;
}
.spec-card {
    background: var(--white);
    padding: 3rem 2rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: 0 15px 35px rgba(61, 90, 86, 0.05);
}

.spec-icon-wrapper {
    width: 65px;
    height: 65px;
    background: var(--secondary);
    border-radius: 50%;
    margin: 0 auto 1.5rem auto;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

/* Academic Timeline - Premium Redesign */
.academic-timeline {
    position: relative;
    padding-left: 2.5rem;
    margin-top: 3.5rem;
}

.academic-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 5px;
    width: 2px;
    height: calc(100% - 1.5rem);
    background: linear-gradient(to bottom, var(--gold), var(--secondary));
    opacity: 0.5;
}

.academic-item {
    position: relative;
    margin-bottom: 2.5rem;
}

.academic-item:last-child {
    margin-bottom: 0;
}

.academic-marker {
    position: absolute;
    left: -3rem;
    top: 0;
    width: 32px;
    height: 32px;
    background: var(--white);
    border: 2px solid var(--gold);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gold);
    z-index: 5;
    box-shadow: var(--shadow-soft);
}

.academic-marker i {
    width: 14px;
    height: 14px;
}

.academic-year {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 1px;
    margin-bottom: 0.25rem;
}

.academic-content h4 {
    font-size: 1.15rem;
    color: var(--primary);
    margin-bottom: 0.2rem;
    font-family: 'Playfair Display', serif;
}

.academic-content p {
    font-size: 0.9rem;
    color: var(--text-light);
    font-weight: 500;
}

/* Career Timeline - Premium Redesign */
.expertise-timeline {
    margin-top: 3.5rem;
}

.timeline-title {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 2.5rem;
}

.timeline {
    position: relative;
    padding-left: 2rem;
    margin-left: 0.5rem;
}

/* Vertical Line */
.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, var(--gold) 0%, var(--accent) 50%, var(--secondary) 100%);
    border-radius: 10px;
}

.timeline-item {
    position: relative;
    margin-bottom: 3.5rem; /* Large mobile spacing */
}

/* Achievement Nodes */
.time-marker {
    position: absolute;
    left: -2.35rem; /* Centered on the line */
    top: 0.2rem;
    width: 14px;
    height: 14px;
    background-color: var(--white);
    border: 3px solid var(--gold);
    border-radius: 50%;
    z-index: 10;
    box-shadow: 0 0 10px rgba(212, 175, 55, 0.4);
}

.timeline-item:first-child .time-marker {
    background-color: var(--gold);
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.6);
}

/* Role & Content Hierarchy */
.time-content h4 {
    font-family: 'Playfair Display', serif;
    font-size: 1.25rem;
    color: var(--primary);
    margin-bottom: 0.4rem;
    line-height: 1.2;
}

.time-content p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.4;
    font-weight: 500;
}

.time-content p span {
    font-weight: 700;
    color: var(--primary);
    border-bottom: 2px solid var(--secondary);
}

/* Experience Tiles */
.skills-list {
    margin-top: 3rem; /* Increased top-margin */
    display: grid;
    gap: 2.25rem; /* More breathing room between items */
}

.skill-item {
    display: flex;
    gap: 1.6rem; /* Increased icon-to-text gap */
}

.skill-icon {
    color: var(--accent);
    flex-shrink: 0;
}

.skill-text strong {
    display: block;
    font-size: 1.1rem;
    color: var(--primary);
    margin-bottom: 0.5rem; /* Increased title-to-description margin */
}

.skill-text p {
    color: var(--text-light);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Contact Section */
.contact-card-wrapper {
    background: var(--white);
    padding: 2.5rem 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
}

.contact-method {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.method-icon {
    width: 50px;
    height: 50px;
    background: var(--secondary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.contact-cta-box {
    background: var(--secondary);
    padding: 2rem;
    border-radius: var(--radius);
    text-align: center;
}

.contact-cta-box h3 {
    color: var(--primary);
    margin-bottom: 1rem;
}

.contact-cta-box p {
    color: var(--text-light);
    margin-bottom: 2rem; /* The requested space after the last line */
    font-size: 1rem;
}

.cta-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.full-width {
    width: 100%;
}

/* Gallery Grid - Premium Masonry Look */
.gallery-section {
    padding-top: 3rem;
    padding-bottom: 8rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
}

.gallery-item {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--white);
    box-shadow: var(--shadow-soft);
    cursor: pointer;
    transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.gallery-item:hover img {
    transform: scale(1.08); /* Sophisticated subtle zoom */
}

.gallery-info {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 2rem 1.5rem;
    background: linear-gradient(to top, rgba(10, 20, 20, 0.9) 0%, rgba(10, 20, 20, 0) 100%);
    color: var(--white);
    transform: translateY(20px);
    opacity: 0;
    transition: 0.4s ease;
}

.gallery-item:hover .gallery-info {
    transform: translateY(0);
    opacity: 1;
}

.gallery-category {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--gold);
    margin-bottom: 0.5rem;
}

.gallery-info h4 {
    font-family: 'Playfair Display', serif;
    font-size: 1.2rem;
    line-height: 1.2;
}

.cert-item img {
    object-fit: contain !important; /* Ensures documents/certs don't cut off */
    padding: 1.5rem;
    background: #fff;
}

/* Tablet & Desktop Gallery Grid */
@media (min-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    /* Simulate masonry with specific row spans */
    .gallery-item:nth-child(3n) {
        grid-row: span 2;
    }
}

@media (min-width: 1024px) {
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}
.footer {
    background-color: var(--primary);
    color: var(--white);
    padding: 6rem 0 3rem 0;
}

.footer-grid {
    display: flex;
    flex-direction: column;
    gap: 4rem;
    margin-bottom: 2.5rem; /* Tightened from 5rem to avoid 'weird' disconnected gap */
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.footer-logo {
    font-size: 1.8rem;
    color: var(--white);
    font-family: 'Playfair Display', serif;
}

.footer-tagline {
    font-size: 1rem;
    opacity: 0.8;
    font-style: italic;
    max-width: 300px;
    line-height: 1.6;
}

.footer-socials {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.5rem;
}

.social-link {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.08); /* Sophisticated glass effect */
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.social-link:hover {
    background: var(--white);
    color: var(--primary);
    transform: translateY(-5px);
}

.social-link i {
    width: 20px;
    height: 20px;
    color: var(--gold); /* Explicit gold for high-vis */
}

.footer-heading {
    font-size: 1.2rem;
    color: var(--gold);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
    list-style: none; /* No dots in the navigation */
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    transition: 0.3s;
}

.footer-links a:hover {
    color: var(--gold);
    padding-left: 8px;
}

.footer-contact-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    list-style: none; /* No dots in the contact list */
}

.footer-contact-list li {
    display: flex;
    gap: 1.2rem;
    align-items: flex-start;
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.95rem;
}

.footer-contact-list i {
    color: var(--gold);
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    margin-top: 3px;
}

.footer-bottom {
    padding-top: 1.5rem; /* Reduced from 3rem for a more compact and intentional look */
    border-top: 1px solid rgba(212, 175, 55, 0.15); /* More refined gold-tinted anchor line */
    text-align: center;
}

.footer-bottom p {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.45); /* Slightly higher visibility for readability */
    text-transform: uppercase;
    letter-spacing: 2.5px;
    font-weight: 500;
}

.dev-credit {
    margin-top: 0.8rem;
}

.footer-legal {
    display: flex;
    gap: 2rem;
    justify-content: center;
}

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

/* Tablet & Desktop Layout */
@media (min-width: 768px) {
    .nav-links { display: flex; gap: 2.5rem; color: var(--white); }
    .hero-title { font-size: 4.5rem; }
    .hero-tagline { font-size: 1.4rem; max-width: 600px; }
    .hero-btns { flex-direction: row; max-width: none; justify-content: center; }
    
    .logo .name { opacity: 1; } /* Always show on desktop */
    
    .about-grid {
        flex-direction: column;
        max-width: 800px;
        margin: 0 auto;
    }
    
    .spec-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
    .expertise-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; }
    .contact-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 4rem; }

    .footer-grid {
        flex-direction: row;
        justify-content: space-between;
        gap: 2rem;
    }
    
    .footer-column:nth-child(1) { flex: 1.4; }
    .footer-column:nth-child(2) { flex: 1; }
    .footer-column:nth-child(3) { flex: 1.4; }
    
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
    
    .footer-legal {
        justify-content: flex-end;
    }
}

@media (min-width: 1024px) {
    .container { padding: 0 3rem; }
    .hero-title { font-size: 5.5rem; }
}

/* Animations */
/* Reveal on Scroll - Original Fade-Up Animation */
[data-reveal] {
    opacity: 0;
    transform: translateY(30px);
    transition: 1s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-reveal].revealed {
    opacity: 1;
    transform: translateY(0);
}