* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #0ea5e9;
    --accent: #8b5cf6;
    --dark: #0f172a;
    --dark-light: #1e293b;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --light: #f8fafc;
    --white: #ffffff;
    --nav-bg: #ffffff;  

    
    
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.6;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-dark);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: none;
    /* box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1); */
    z-index: 1000;
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
}

.logo {
    font-weight: 800;
    font-size: 1.25rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

nav ul li a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--gray);
    font-weight: 500;
    font-size: 0.9rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

nav ul li a:hover,
nav ul li a.active {
    color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

/* Hamburger base styles */
.hamburger {
  display: none;
  position: relative;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  width: 36px;      /* more room so the X isn't cut */
  height: 36px;
  padding: 0;
  border: none;
  background: transparent;
}

.hamburger span {
  position: absolute;          /* stack all three in the centre */
  top: 50%;
  left: 50%;
  width: 25px;
  height: 2px;
  background: var(--dark);
  border-radius: 999px;
  transform: translate(-50%, -50%);   /* perfectly centred */
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* spacing when CLOSED (3 lines) */
.hamburger span:nth-child(1) {
  transform: translate(-50%, -50%) translateY(-6px);
}
.hamburger span:nth-child(2) {
  transform: translate(-50%, -50%);
}
.hamburger span:nth-child(3) {
  transform: translate(-50%, -50%) translateY(6px);
}

/* When menu is open, turn into centred X */
.hamburger.is-open span:nth-child(1) {
  transform: translate(-50%, -50%) rotate(45deg);
}
.hamburger.is-open span:nth-child(2) {
  opacity: 0;
}
.hamburger.is-open span:nth-child(3) {
  transform: translate(-50%, -50%) rotate(-45deg);
}





/* Mobile styles (<= 768px) */
@media (max-width: 768px) {
  /* NAV BAR LAYOUT – logo left, hamburger right */
  nav .container {
    padding: 0.75rem 1.5rem;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 0;
  }

  /* show hamburger on mobile */
  .hamburger {
    display: flex;
  }

  /* dropdown menu */
  nav ul {
    position: absolute;
    top: 56px;          /* just under the nav bar */
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--nav-bg); 
    padding: 0.75rem 1.5rem 1rem;
    gap: 0;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s ease, opacity 0.25s ease;
    /* box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1); */
  }

  nav ul li {
    text-align: center;
    padding: 0.4rem 0;
  }

  /* when JS adds .active */
  nav ul.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  /* --- your existing mobile tweaks --- */
  nav ul li a {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
  }

  .hero-content h1 {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.2rem;
  }

  .hero-tagline {
    font-size: 1rem;
  }

  .section-header h2 {
    font-size: 1.75rem;
  }

  .objective-card {
    padding: 1.9rem; /* little tighter on mobile */
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
}




/* Hero Section */
#home {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 50%, #312e81 100%);
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

#home::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(14, 165, 233, 0.2) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--white);
    /* was 2rem 0; */
    padding: 1.5rem 0;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: 1.25rem; /* slightly reduced */
}

.hero-tagline {
    font-size: 1.1rem;
    color: var(--gray-light);
    max-width: 600px;
    margin: 0 auto 1.6rem;    /* was 1.75rem */
    line-height: 1.8;
}




.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem; /* was 1rem */
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 1.8rem; /* slightly smaller */
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.4);
    color: var(--white);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--accent), var(--primary));
    color: var(--white);
    border: none;
}

.btn-secondary:hover {
     transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(139, 92, 246, 0.4); /* soft purple glow */
    color: var(--white);
}


.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    color: var(--white);
}

/* Section Styles */
section {
    /* was 5rem 0; */
    padding: 3.5rem 0;
}

.section-header {
    text-align: center;
    /* was margin-bottom: 3rem; */
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 0.4rem;
}

.section-header p {
    color: var(--gray);
    font-size: 1.05rem;
}

/* About/Objective Section */
/* About / Objective Section */
#objective {
    background: var(--light);
}

.objective-card {
    background: var(--white);
    border-radius: 24px;
    padding: 2.25rem 2.5rem;
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
    border: 1px solid rgba(148, 163, 184, 0.25);
    max-width: 900px;
    margin: 0 auto;
}

/* main text */
.about-main h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--dark);
}

.about-main p {
    font-size: 0.98rem;
    line-height: 1.85;
    color: var(--gray);
    margin-bottom: 0.9rem;
}

/* snapshot row */
.about-highlights {
    margin-top: 1.75rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e5e7eb;
}

.about-highlights h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--gray-light);
    margin-bottom: 0.9rem;
}

.about-highlights ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.about-highlights li {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.35rem 0.9rem;
    border-radius: 999px;
    background: linear-gradient(
        135deg,
        rgba(99, 102, 241, 0.06),
        rgba(14, 165, 233, 0.04)
    );
    border: 1px solid rgba(148, 163, 184, 0.6);
}

.about-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--gray-light);
}

.about-value {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--dark);
}

/* mobile tweaks for about card */
@media (max-width: 768px) {
    .objective-card {
        padding: 1.75rem 1.5rem;
    }

    .about-highlights ul {
        flex-direction: column;
        align-items: flex-start;
    }
}

/* Skills Section */
#skills {
    background: var(--light);
}

.skills-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    /* was 1.5rem; */
    gap: 1.25rem;
}

.skill-card {
    background: var(--white);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skill-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.skill-card h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray);
    margin-bottom: 0.9rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.skill-tag {
    display: inline-block;
    padding: 0.45rem 0.9rem;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(14, 165, 233, 0.1));
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

/* Education Timeline */
#education {
    background: var(--white);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    border-radius: 3px;
}

.timeline-item {
    position: relative;
    padding-left: 2.5rem;
    /* was 2.5rem; */
    padding-bottom: 1.75rem;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 0;
    width: 15px;
    height: 15px;
    background: var(--white);
    border: 3px solid var(--primary);
    border-radius: 50%;
}

.timeline-date {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 0.6rem;
}

.timeline-content h3 {
    font-size: 1.1rem;
    color: var(--dark);
    margin-bottom: 0.25rem;
}

.timeline-content p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* Projects Section */
/* Projects Section */
#projects {
    background: var(--white);
}

/* Filter bar */
.project-filters {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin: 2rem 0 2.5rem;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.6rem 1.4rem;
    border-radius: 999px;
    border: 1px solid #d1d5db;
    background: #ffffff;
    color: #374151;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.filter-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: #eff6ff;
}

.filter-btn.active {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.25);
}

/* Cards grid */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.25rem;
}

/* Make the cards a tiny bit darker than the background */
.project-card {
    background: #f9fafb; 
    border-radius: 20px;
    padding: 1.75rem;
    border: 1px solid rgba(148, 163, 184, 0.25);
    box-shadow: 0 14px 30px rgba(15, 23, 42, 0.06);
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 45px rgba(15, 23, 42, 0.12);
}




.project-card h3 {
    font-size: 1.25rem;
    color: var(--dark);
    margin-bottom: 0.6rem;
}

.project-card p {
    color: var(--gray);
    font-size: 0.95rem;
    margin-bottom: 1.1rem;
    line-height: 1.6;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-bottom: 1rem;
}

.project-tag {
    padding: 0.35rem 0.75rem;
    background: var(--light);
    color: var(--gray);
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Slightly smaller button inside cards */
.project-btn {
    padding: 0.6rem 1.3rem;
    font-size: 0.9rem;
}

/* Contact Section */
/* Contact Section – light version */
#contact {
    background: var(--light);      /* same as other sections */
    color: var(--dark);
}

#contact .section-header h2 {
    color: var(--dark);
}

#contact .section-header p {
    color: var(--gray);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.25rem;
    max-width: 1100px;
    margin: 0 auto;
}

.contact-card {
    background: var(--white);                          /* light card */
    border: 1px solid rgba(15, 23, 42, 0.06);          /* soft border */
    border-radius: 16px;
    padding: 1.5rem;
    text-align: center;
    transition: all 0.3s ease;
}

.contact-card:hover {
    background: #f1f5f9;
    transform: translateY(-5px);
}

.contact-card h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--gray);
    margin-bottom: 0.75rem;
}

.contact-card a {
    color: var(--primary);
    font-size: 0.95rem;
    font-weight: 500;
    display: inline-block;
    padding: 0 0.5rem;
    /* word-break:  break-word; */
}

.contact-card a:hover {
    color: var(--primary-dark);
}


/* Footer */
footer {
    background: var(--dark);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 2rem 0;
    text-align: center;
}

footer h3 {
  color: var(--gray-light);
  font-size: 0.9rem;   /* a tiny bit smaller */
  font-weight: 400;    /* less “heading-like” */
}






@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }

    /* was 3rem 0; */
    section {
        padding: 2.25rem 0;
    }

    .hero-links {
        flex-direction: column;
        align-items: center;
    }

    .hero-links a {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}