/* Variables */
:root {
    --bg-color: #0f172a;
    --surface-color: #1e293b;
    --primary-color: #10b981;
    --primary-hover: #059669;
    --text-color: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --container-width: 1200px;
    --header-height: 70px;
    --transition: all 0.3s ease;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

/* Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn--primary {
    background-color: var(--primary-color);
    color: #fff;
}

.btn--primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
}

.btn--secondary {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn--secondary:hover {
    background-color: rgba(16, 185, 129, 0.1);
    transform: translateY(-2px);
}

.section {
    padding: 80px 0;
}

.section__title {
    font-size: 2rem;
    margin-bottom: 40px;
    text-align: center;
    position: relative;
    display: inline-block;
    left: 50%;
    transform: translateX(-50%);
}

.section__title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.header__container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav__list {
    display: flex;
    gap: 30px;
}

.nav__link {
    font-weight: 500;
    color: var(--text-secondary);
}

.nav__link:hover {
    color: var(--primary-color);
}

.nav__toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero */
.hero {
    padding-top: calc(var(--header-height) + 80px);
    padding-bottom: 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.hero__content {
    flex: 1;
}

.hero__title {
    font-size: 2.9rem;
    font-weight: 800;
    margin-bottom: 10px;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero__subtitle {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 20px;
    font-weight: 600;
}

.hero__description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 30px;
    max-width: 500px;
}

.hero__actions {
    display: flex;
    gap: 15px;
}

.hero__image-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
}

.hero__image-placeholder {
    width: 300px;
    height: 300px;
    background-color: var(--surface-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: var(--primary-color);
    border: 4px solid var(--primary-color);
    box-shadow: 0 0 30px rgba(16, 185, 129, 0.2);
    animation: float 6s ease-in-out infinite;
    overflow: hidden;
}

.hero__image-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-20px);
    }

    100% {
        transform: translateY(0px);
    }
}

/* About */
.about__content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.about__content p {
    margin-bottom: 20px;
}

/* Skills */
.skills__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.skill-category {
    background-color: var(--surface-color);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.skill-category:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.skill-category__title {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.skill-tag {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--primary-color);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

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

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 2px;
    background-color: var(--border-color);
}

.timeline__item {
    margin-bottom: 40px;
    padding-left: 30px;
    position: relative;
}

.timeline__item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 5px;
    width: 14px;
    height: 14px;
    background-color: var(--primary-color);
    border-radius: 50%;
    border: 3px solid var(--bg-color);
}

.timeline__date {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.timeline__role {
    font-size: 1.3rem;
    color: var(--text-color);
    margin-bottom: 5px;
}

.timeline__company {
    font-size: 1.1rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    font-weight: 500;
}

.timeline__achievements {
    list-style: disc;
    padding-left: 20px;
    color: var(--text-secondary);
}

.timeline__achievements li {
    margin-bottom: 8px;
}

/* Education */
.education__block {
    max-width: 800px;
    margin: 0 auto 40px;
}

.education__type {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.education__item {
    background-color: var(--surface-color);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 15px;
    border: 1px solid var(--border-color);
}

.education__school {
    font-weight: 600;
    font-size: 1.1rem;
}

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

/* Contact */
.contact__content {
    text-align: center;
}

.contact__text {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.contact__links {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
}

.contact__link {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    color: var(--text-color);
    padding: 15px 30px;
    background-color: var(--surface-color);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.contact__link:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-5px);
}

/* Footer */
.footer {
    padding: 40px 0;
    text-align: center;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: 40px;
}

/* Responsive */
@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: var(--surface-color);
        padding: 20px;
        transform: translateY(-150%);
        transition: var(--transition);
        border-bottom: 1px solid var(--border-color);
    }

    .nav.active {
        transform: translateY(0);
    }

    .nav__list {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }

    .nav__toggle {
        display: block;
    }

    .hero__container {
        flex-direction: column-reverse;
        text-align: center;
    }

    .hero__title {
        font-size: 2.5rem;
    }

    .hero__actions {
        justify-content: center;
    }

    .timeline::before {
        left: 0;
    }

    .contact__links {
        flex-direction: column;
        align-items: stretch;
    }
}

/* Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}