:root {
    --bg-primary: #FEFFFC;
    --bg-secondary: #ECEFEC;
    --bg-card: white;
    --text-primary: #333;
    --text-secondary: #555;
    --text-light: #666;
    --accent: #3d6185;
    --border: #e0e0e0;
    --shadow: #cfcfcf;
    --tag-bg: #e0e0e0;
    --tag-text: #555;
}
[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-card: #363636;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-light: #888;
    --accent: #5a8bb5;
    --border: #555;
    --shadow: #000;
    --tag-bg: #4a4a4a;
    --tag-text: #c0c0c0;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: var(--bg-primary);
    border-bottom: 2px solid var(--border);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    transition: background-color 0.3s ease;
}   

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.3rem;
    font-weight: bold;
    color: var(--accent);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 1.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: normal;
    padding: 5px 10px;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.nav-links a:hover {
    background-color: var(--bg-secondary);
}

.hero {
    padding: 120px 0 60px;
    background: var(--bg-secondary);
    text-align: center;
    transition: background-color 0.3s ease;
}

.hero h1{
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    color: var(--accent);
}

.hero .subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.hero .description {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin:  0 auto 2rem;
}

.cta-button {
    display: inline-block;
    padding:  10px 25px;
    background: #2c3e50;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-weight: normal;
    transition: background-color 0.2s;
}

.cta-button:hover {
    background: #34495e;
}

section {
    padding: 50px 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--accent);
    border-bottom: 3px solid var(--border);
    padding-bottom: 10px;
}

.about {
    background: var(--bg-card);
    transition: background-color 0.3s ease;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    align-items: start;
}

.profile-pic {
    width: 100%;
    max-width: 250px;
    height: 334px;
    background: var(--shadow);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 1.1rem;
    box-shadow: 14px 5px 25px 5px var(--shadow);
}
.profile-pic img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 20px;
}

.about-text {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-secondary);
}

.about-text p {
    margin-bottom: 1rem;
}


.skills {
    background: var(--bg-secondary);
    transition: background-color 0.3s ease;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}
.skill-category {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    box-shadow: 14px 5px 25px 5px var(--shadow);
    transition: transform 0.5s ease-in-out;

}


.skill-category h3 {
    color: var(--accent);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}
.skill-category:hover {
    transform: scale(1.05);
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    background: var(--tag-bg);
    color: var(--tag-text);
    padding: 0.3rem 0.7rem;
    border-radius: 15px;
    font-size: 0.85rem;
}

.projects {
    background: var(--bg-card);
    transition: background-color 0.3s ease;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.project-card {
    background: var(--bg-card);
    transition: background-color 0.3s ease;
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: 14px 5px 25px 5px var(--shadow);
    transition: transform 0.5s ease-in-out;
}

.project-card:hover {
    transform: scale(1.05);
}

.project-image {
    height: 150px;
    background: var(--bg-border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 2rem;
    overflow: hidden;
}

.project-image img {
    max-width: 100%;
    object-fit: cover;
    display: block;
}

.project-content {
    padding: 1.5rem;
}

.project-content h3 {
    color: var(--accent);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.project-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.project-link {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    background: #2c3e50;
    color: white;
    text-decoration: none;
    border-radius: 12px;
    border: 1px solod white;
    transition: background-color 0.2s;
    margin-bottom: 0.6rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.tech-tag {
    background: var(--tag-bg);
    color: var(--text-secondary);
    padding: 0.2rem 0.5rem;
    border-radius: 12px;
    font-size: 0.75rem;
}

.education {
    background: var(--bg-card);
    transition: background-color 0.3s ease;
}

.experience {
    background: var(--bg-secondary);
    transition: background-color 0.3s ease;
}

.timeline {
    margin-top: 1rem;
}

.timeline-item {
    display: flex;
    margin-bottom: 1.5rem;
    background: var(--bg-card);
    border-radius: 6px;
    border: 1px solod var(--border);
    padding: 1.5rem;
    box-shadow: 14px 5px 25px 5px var(--shadow);
    transition: transform 0.5s ease-in-out;
}
.timeline-item:hover {
    transform: scale(1.02);
}


.timeline-content {
    flex: 1;
}

.timeline-content h3 {
    color: var(--text-light);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    font-weight: normal;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.timeline-date {
    color: var(--text-light);
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    font-size: 0.85rem;
    height: fit-content;
    margin-left: 1rem;
}

.contact {
    background: #2c3e50;
    color: white;
    text-align: center;
}

.contact p {
    margin-bottom: 2rem;
    font-size: 1rem;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.contact-link {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: transparent;
    color: white;
    text-decoration: none;
    border-radius: 4px;
    border: 1px solod white;
    transition: background-color 0.2s;
}

.contact-link:hover {
    background: rgba(255,255,255,0.1);
}


@media (max-width:768px) {
    .nav-links {
        display: none;
    }
    .hero h1 {
        font-size: 2rem;
    }
    .about-content {
        grid-template-columns: 1fr;
    }
    .timeline-item {
        flex-direction: column;
    }
    .timeline-date {
        margin-left: 0px;
        margin-top: 1rem;
        align-self: flex-start;
    }
    .contact-links {
        flex-direction: column;
        align-items: center;
    }
}


/* Theme button test */

 /* Container */
    .themeToggle {
      width: 60px;
      height: 60px;
      perspective: 1000px;
      cursor: pointer;
    }

    /* The flippable card */
    .flip-card {
      width: 100%;
      height: 100%;
      position: relative;
      transform-style: preserve-3d;
      transition: transform 0.6s;
    }

    .flip-card.flipped {
      transform: rotateX(180deg);
    }

    /* Two sides */
    .flip-side {
      position: absolute;
      width: 100%;
      height: 100%;
      backface-visibility: hidden;
    }

    .flip-front {
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .flip-back {
      transform: rotateX(180deg);
      display: flex;
      align-items: center;
      justify-content: center;
    }

    /* Your animation */
    .flip-2-hor-top-1 {
      animation: flip-2-hor-top-1 0.5s cubic-bezier(0.455, 0.030, 0.515, 0.955) both;
    }

    @keyframes flip-2-hor-top-1 {
      0% {
        transform: translateY(0) rotateX(0);
        transform-origin: 50% 0%;
      }
      100% {
        transform: translateY(-100%) rotateX(-180deg);
        transform-origin: 50% 100%;
      }
    }