/* ===== VARIABLES ===== */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #64748b;
    --text-color: #1e293b;
    --text-light: #64748b;
    --bg-color: #ffffff;
    --bg-secondary: #f8fafc;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.3s ease;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

/* ===== UTILITIES ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 5rem 0;
}

.section__title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-color);
    position: relative;
}

.section__title::after {
    content: '';
    position: absolute;
    bottom: -0.75rem;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 0.5rem;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

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

.btn--primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

/* ===== HEADER & NAVIGATION ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4.5rem;
}

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

.nav__menu {
    display: flex;
    gap: 2rem;
}

.nav__link {
    color: var(--text-color);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -0.5rem;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 0.25rem;
    cursor: pointer;
}

.nav__toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-color);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 4.5rem;
    background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
}

.hero__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero__greeting {
    color: var(--primary-color);
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: block;
}

.hero__title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.hero__subtitle {
    font-size: 1.5rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.hero__description {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.hero__buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
}

.hero__social {
    display: flex;
    gap: 1rem;
}

.hero__social a {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: 0.5rem;
    color: var(--text-color);
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.hero__social a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-4px);
}

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

.hero__blob {
    width: 100%;
    max-width: 400px;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* ===== ABOUT SECTION ===== */
.about {
    background: var(--bg-color);
}

.about__content {
    max-width: 900px;
    margin: 0 auto;
}

.about__description {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    text-align: justify;
}

.about__info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}

.about__box {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    transition: var(--transition);
    border: 2px solid var(--border-color);
}

.about__box:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.about__number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.about__label {
    display: block;
    color: var(--text-light);
    font-size: 0.875rem;
}

/* ===== SKILLS SECTION ===== */
.skills {
    background: var(--bg-secondary);
}

.skills__content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
}

.skills__category {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
}

.skills__subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--text-color);
}

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

.skill__item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

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

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

.skill__level {
    font-size: 0.875rem;
    color: var(--text-light);
}

.skill__bar {
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
}

.skill__progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-dark));
    border-radius: 4px;
    transition: width 1s ease;
}

/* ===== PROJECTS SECTION ===== */
.projects {
    background: var(--bg-color);
}

.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project__card {
    background: white;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 2px solid var(--border-color);
}

.project__card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.project__image {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.project__overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(37, 99, 235, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.project__card:hover .project__overlay {
    opacity: 1;
}

.project__link {
    padding: 0.75rem 1.5rem;
    background: white;
    color: var(--primary-color);
    border-radius: 0.5rem;
    font-weight: 600;
    transition: var(--transition);
}

.project__link:hover {
    transform: scale(1.05);
}

.project__content {
    padding: 2rem;
}

.project__title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.project__description {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.project__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tag {
    padding: 0.375rem 0.75rem;
    background: var(--bg-secondary);
    color: var(--primary-color);
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.project__features ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.project__features li {
    color: var(--text-light);
    font-size: 0.875rem;
}

/* ===== CONTACT SECTION ===== */
.contact {
    background: var(--bg-secondary);
}

.contact__content {
    max-width: 800px;
    margin: 0 auto;
}

.contact__description {
    font-size: 1.125rem;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 3rem;
    line-height: 1.8;
}

.contact__cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contact__card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: var(--transition);
    border: 2px solid var(--border-color);
}

.contact__card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.contact__card svg {
    color: var(--primary-color);
    flex-shrink: 0;
}

.contact__card h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.contact__card a {
    color: var(--text-light);
    transition: var(--transition);
}

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

/* ===== FOOTER ===== */
.footer {
    background: var(--text-color);
    color: white;
    padding: 2rem 0;
}

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

.footer__text {
    color: rgba(255, 255, 255, 0.8);
}

.footer__social {
    display: flex;
    gap: 1rem;
}

.footer__social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 0.5rem;
    color: white;
    transition: var(--transition);
}

.footer__social a:hover {
    background: var(--primary-color);
    transform: translateY(-4px);
}

/* ===== RESPONSIVE ===== */
@media screen and (max-width: 968px) {
    .section__title {
        font-size: 2rem;
    }

    .hero__content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero__title {
        font-size: 2.5rem;
    }

    .hero__subtitle {
        font-size: 1.25rem;
    }

    .hero__buttons {
        justify-content: center;
    }

    .hero__social {
        justify-content: center;
    }

    .hero__image {
        order: -1;
    }

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

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

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

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

    .footer__content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media screen and (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .section {
        padding: 3rem 0;
    }

    .nav__menu {
        position: fixed;
        top: 4.5rem;
        left: -100%;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
    }

    .nav__menu.active {
        left: 0;
    }

    .nav__toggle {
        display: flex;
    }

    .hero__title {
        font-size: 2rem;
    }

    .hero__buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        text-align: center;
    }
}

@media screen and (max-width: 480px) {
    .hero__title {
        font-size: 1.75rem;
    }

    .hero__subtitle {
        font-size: 1rem;
    }

    .section__title {
        font-size: 1.75rem;
    }
}