/*===== GOOGLE FONTS =====*/
@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@400;600;700&display=swap");

/*===== VARIABLES CSS =====*/
:root {
    --header-height: 3rem;
    --font-semi: 600;
    /*===== Colores =====*/
    /*Purple 260 - Red 355 - Blue 224 - Pink 340*/
    /* HSL color mode */
    --hue-color: 224;
    --first-color: hsl(var(--hue-color), 89%, 60%);
    --second-color: hsl(var(--hue-color), 56%, 12%);
    /*===== Fuente y tipografia =====*/
    --body-font: "Poppins", sans-serif;
    --big-font-size: 2rem;
    --h2-font-size: 1.25rem;
    --normal-font-size: 0.938rem;
    --smaller-font-size: 0.75rem;
    /*===== Margenes =====*/
    --mb-2: 1rem;
    --mb-4: 2rem;
    --mb-5: 2.5rem;
    --mb-6: 3rem;
    /*===== z index =====*/
    --z-back: -10;
    --z-fixed: 100;
}

@media screen and (min-width: 968px) {
    :root {
        --big-font-size: 3.5rem;
        --h2-font-size: 2rem;
        --normal-font-size: 1rem;
        --smaller-font-size: 0.875rem;
    }
}

/*===== BASE =====*/
*,
::before,
::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: var(--header-height) 0 0 0;
    font-family: var(--body-font);
    font-size: var(--normal-font-size);
    color: var(--second-color);
}

h1,
h2,
p {
    margin: 0;
}

ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

a {
    text-decoration: none;
}

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

/*===== CLASS CSS ===== */
.section-title {
    position: relative;
    font-size: var(--h2-font-size);
    color: var(--first-color);
    margin-top: var(--mb-2);
    margin-bottom: var(--mb-4);
    text-align: center;
}

.section-title::after {
    position: absolute;
    content: "";
    width: 64px;
    height: 0.18rem;
    left: 0;
    right: 0;
    margin: auto;
    top: 2rem;
    background-color: var(--first-color);
}

.section {
    padding-top: 3rem;
    padding-bottom: 2rem;
}

/*===== LAYOUT =====*/
.bd-grid {
    max-width: 1024px;
    display: grid;
    margin-left: var(--mb-2);
    margin-right: var(--mb-2);
}

.l-header {
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: var(--z-fixed);
    background-color: #fff;
    box-shadow: 0 1px 4px rgba(146, 161, 176, 0.15);
}

/*===== NAV =====*/
.nav {
    height: var(--header-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: var(--font-semi);
}

@media screen and (max-width: 767px) {
    .nav__menu {
        position: fixed;
        top: var(--header-height);
        right: -100%;
        width: 80%;
        height: 100%;
        padding: 2rem;
        background-color: var(--second-color);
        transition: 0.5s;
    }
}

.nav__item {
    margin-bottom: var(--mb-4);
}

.nav__link {
    position: relative;
    color: #fff;
}

.nav__link:hover {
    position: relative;
}

.nav__link:hover::after {
    position: absolute;
    content: "";
    width: 100%;
    height: 0.18rem;
    left: 0;
    top: 2rem;
    background-color: var(--first-color);
}

.nav__logo {
    color: var(--second-color);
}

.nav__toggle {
    color: var(--second-color);
    font-size: 1.5rem;
    cursor: pointer;
}

/*Active menu*/
.active-link::after {
    position: absolute;
    content: "";
    width: 100%;
    height: 0.18rem;
    left: 0;
    top: 2rem;
    background-color: var(--first-color);
}

/*=== Show menu ===*/
.show {
    right: 0;
}

/*===== HOME =====*/
.home {
    position: relative;
    row-gap: 5rem;
    padding: 4rem 0 5rem;
}

.home__data {
    align-self: center;
}

.home__title {
    font-size: var(--big-font-size);
    margin-bottom: var(--mb-5);
}

.home__title-color {
    color: var(--first-color);
}

.home__social {
    display: flex;
    flex-direction: column;
}

.home__social-icon {
    width: max-content;
    margin-bottom: var(--mb-2);
    font-size: 1.5rem;
    color: var(--second-color);
}

.home__social-icon:hover {
    color: var(--first-color);
}

.home__img {
    position: absolute;
    right: 0;
    bottom: 0;
    width: 260px;
}

.home__blob {
    fill: var(--first-color);
}

.home__blob-img {
    width: 360px;
}

/*BUTTONS*/
.button {
    display: inline-block;
    background-color: var(--first-color);
    color: #fff;
    padding: 0.75rem 2.5rem;
    font-weight: var(--font-semi);
    border-radius: 0.5rem;
    transition: 0.3s;
}

.button:hover {
    box-shadow: 0px 10px 36px rgba(0, 0, 0, 0.15);
}

/* ===== ABOUT =====*/
.about__container {
    row-gap: 2rem;
    text-align: center;
}

.about__subtitle {
    margin-bottom: var(--mb-2);
}

.about__img {
    justify-self: center;
}

.about__img img {
    width: 200px;
    border-radius: 0.5rem;
}

/* ===== SKILLS =====*/
.skills__container {
    row-gap: 2rem;
    text-align: center;
}

.skills__subtitle {
    margin-bottom: var(--mb-2);
}

.skills__text {
    margin-bottom: var(--mb-4);
}

.skills__data {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    font-weight: var(--font-semi);
    padding: 0.5rem 1rem;
    margin-bottom: var(--mb-4);
    border-radius: 0.5rem;
    box-shadow: 0px 4px 25px rgba(14, 36, 49, 0.15);
}

.skills__icon {
    font-size: 2rem;
    margin-right: var(--mb-2);
    color: var(--first-color);
}

.skills__names {
    display: flex;
    align-items: center;
}

.skills__bar {
    position: absolute;
    left: 0;
    bottom: 0;
    background-color: var(--first-color);
    height: 0.25rem;
    border-radius: 0.5rem;
    z-index: var(--z-back);
}

.skills__html {
    width: 95%;
}

.skills__css {
    width: 85%;
}

.skills__js {
    width: 65%;
}

.skills__ux {
    width: 85%;
}

.skills__img {
    border-radius: 0.5rem;
}

/* ===== WORK =====*/
.work__container {
    row-gap: 2rem;
}

.work__img {
    box-shadow: 0px 4px 25px rgba(14, 36, 49, 0.15);
    border-radius: 0.5rem;
    overflow: hidden;
}

.work__img img {
    transition: 1s;
}

.work__img img:hover {
    transform: scale(1.1);
}

/* ===== CONTACT =====*/
.contact__input {
    width: 100%;
    font-size: var(--normal-font-size);
    font-weight: var(--font-semi);
    padding: 1rem;
    border-radius: 0.5rem;
    border: 1.5px solid var(--second-color);
    outline: none;
    margin-bottom: var(--mb-4);
}

.contact__button {
    display: block;
    border: none;
    outline: none;
    font-size: var(--normal-font-size);
    cursor: pointer;
    margin-left: auto;
}

/* ===== FOOTER =====*/
.footer {
    background-color: var(--second-color);
    color: #fff;
    text-align: center;
    font-weight: var(--font-semi);
    padding: 2rem 0;
}

.footer__title {
    font-size: 2rem;
    margin-bottom: var(--mb-4);
}

.footer__social {
    margin-bottom: var(--mb-4);
}

.footer__icon {
    font-size: 1.5rem;
    color: #fff;
    margin: 0 var(--mb-2);
}

.footer__copy {
    font-size: var(--smaller-font-size);
}

/* ===== MEDIA QUERIES=====*/
@media screen and (max-width: 320px) {
    .home {
        row-gap: 2rem;
    }

    .home__img {
        width: 200px;
    }
}

@media screen and (min-width: 576px) {
    .home {
        padding: 4rem 0 2rem;
    }

    .home__social {
        padding-top: 0;
        padding-bottom: 2.5rem;
        flex-direction: row;
        align-self: flex-end;
    }

    .home__social-icon {
        margin-bottom: 0;
        margin-right: var(--mb-4);
    }

    .home__img {
        width: 300px;
        bottom: 25%;
    }

    .about__container {
        grid-template-columns: repeat(2, 1fr);
        align-items: center;
        text-align: initial;
    }

    .skills__container {
        grid-template-columns: 0.7fr;
        justify-content: center;
        column-gap: 1rem;
    }

    .work__container {
        grid-template-columns: repeat(2, 1fr);
        column-gap: 2rem;
        padding-top: 2rem;
    }

    .contact__form {
        width: 360px;
        padding-top: 2rem;
    }

    .contact__container {
        justify-items: center;
    }
}

@media screen and (min-width: 768px) {
    body {
        margin: 0;
    }

    .section {
        padding-top: 4rem;
        padding-bottom: 3rem;
    }

    .section-title {
        margin-bottom: var(--mb-6);
    }

    .section-title::after {
        width: 80px;
        top: 3rem;
    }

    .nav {
        height: calc(var(--header-height) + 1.5rem);
    }

    .nav__list {
        display: flex;
        padding-top: 0;
    }

    .nav__item {
        margin-left: var(--mb-6);
        margin-bottom: 0;
    }

    .nav__toggle {
        display: none;
    }

    .nav__link {
        color: var(--second-color);
    }

    .home {
        padding: 8rem 0 2rem;
    }

    .home__img {
        width: 400px;
        bottom: 10%;
    }

    .about__container {
        padding-top: 2rem;
    }

    .about__img img {
        width: 300px;
    }

    .skills__container {
        grid-template-columns: repeat(2, 1fr);
        column-gap: 2rem;
        align-items: center;
        text-align: initial;
    }

    .work__container {
        grid-template-columns: repeat(3, 1fr);
        column-gap: 2rem;
    }
}

@media screen and (min-width: 992px) {
    .bd-grid {
        margin-left: auto;
        margin-right: auto;
    }

    .home {
        padding: 10rem 0 2rem;
    }

    .home__img {
        width: 450px;
    }
}

/* ===== CUSTOM SKILLS SECTION - BLUE WHITE THEME ===== */
.skills__custom {
    display: flex;
    gap: 32px;
    justify-content: space-between;
    align-items: flex-start;
    background: #fff;
    padding: 32px 16px;
    border-radius: 16px;
    color: var(--second-color);
    margin-top: 24px;
    flex-wrap: wrap;
    box-shadow: 0 4px 32px rgba(10, 10, 35, 0.08);
}

.skills__column {
    flex: 1 1 220px;
    min-width: 220px;
    border-right: 1.5px solid #e0e7ef;
    padding: 0 24px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    background: transparent;
}

.skills__column:last-child {
    border-right: none;
}

.skills__heading {
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.2;
    color: var(--first-color);
    letter-spacing: 0.5px;
}

.skills__heading .white {
    color: var(--second-color);
    font-weight: 700;
}

.skills__list {
    list-style: none;
    padding: 0;
    margin: 0;
    width: 100%;
}

.skills__list li {
    display: flex;
    align-items: top;
    margin-bottom: 18px;
    font-size: 1.08rem;
    font-weight: 400;
    color: var(--second-color);
    letter-spacing: 0.1px;
}

.skills__icon-img {
    width: 38px;
    height: 38px;
    margin-right: 14px;
    background: var(--first-color);
    border-radius: 50%;
    padding: 5px;
    object-fit: contain;
    box-shadow: 0 2px 8px rgba(80, 120, 255, 0.1);
}

.skills__list--methods {
    margin-top: 8px;
}

.skills__list--methods li {
    margin-bottom: 10px;
    font-size: 1.02rem;
    font-weight: 400;
    color: var(--second-color);
    padding-left: 8px;
    position: relative;
}

.skills__list--methods li::before {
    content: "•";
    color: var(--first-color);
    font-size: 1.1em;
    position: absolute;
    left: -12px;
    top: 0;
}

.highlight {
    background: #fff;
    color: var(--first-color);
    padding: 2px 12px;
    border-radius: 8px;
    font-size: 1.1em;
    font-weight: bold;
    border: 2px solid var(--first-color);
    box-shadow: 0 2px 8px rgba(80, 120, 255, 0.1);
}

/* Responsive cho mobile */
@media (max-width: 900px) {
    .skills__custom {
        flex-direction: column;
        gap: 0;
        padding: 20px 8px;
    }

    .skills__column {
        border-right: none;
        border-bottom: 1.5px solid #e0e7ef;
        padding: 0 0 18px 0;
        min-width: unset;
        width: 100%;
        margin-bottom: 18px;
        background: transparent;
    }

    .skills__column:last-child {
        border-bottom: none;
        margin-bottom: 0;
    }
}

.skills__icon-img {
    font-size: 1.8rem;
    /* Tăng kích thước icon */
    width: 44px;
    height: 44px;
    margin-right: 14px;
    color: #fff;
    /* Icon màu trắng */
    background: var(--first-color);
    /* Nền xanh chủ đạo */
    border-radius: 50%;
    padding: 7px;
    display: flex;
    align-items: center;
    justify-content: center;
    object-fit: contain;
    box-shadow: 0 2px 8px rgba(80, 120, 255, 0.1);
}

/* ===== BACKGROUND SECTION - EDUCATION & EXPERIENCE (THEME XANH TRẮNG ĐEN) ===== */
.background__container-2col {
    display: flex;
    gap: 48px;
    justify-content: space-between;
    align-items: flex-start;
    margin-top: 32px;
    flex-wrap: wrap;
    padding-left: 32px;
    padding-right: 32px;
}

.background__col {
    flex: 1 1 340px;
    min-width: 320px;
}

.background__bigtitle {
    font-size: 2rem;
    font-weight: 900;
    color: var(--first-color);
    /* Xanh chủ đạo */
    margin-bottom: 24px;
    letter-spacing: 1px;
}

.background__item {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    margin-bottom: 32px;
}

.background__icon {
    width: 72px;
    height: 72px;
    min-width: 72px;
    min-height: 72px;
    background: var(--first-color);
    /* Nền xanh chủ đạo */
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 12px rgba(10, 10, 35, 0.07);
}

.background__icon img {
    width: 44px;
    height: 44px;
    object-fit: contain;
    background: transparent;
    filter: brightness(0) invert(1);
    /* Logo trắng trên nền xanh */
}

.background__school {
    font-size: 1.15rem;
    color: var(--first-color);
    /* Xanh chủ đạo */
    font-weight: 700;
    letter-spacing: 0.5px;
}

.background__degree {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--second-color);
    /* Đen/xanh đậm */
    display: block;
    margin-top: 2px;
}

.background__desc {
    font-size: 0.98rem;
    color: #222b45;
    /* Đen nhạt hoặc var(--second-color) */
    display: block;
    margin-top: 2px;
}

.background__col:first-child {
    margin-left: 100px;
}

@media (max-width: 900px) {
    .background__container-2col {
        flex-direction: column;
        gap: 28px;
        padding-left: 12px;
        padding-right: 12px;
    }

    .background__col:first-child {
        margin-left: 0;
    }
}

/* Project full-width 2 columns */
.project-card-full {
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
    overflow: hidden;
    transition: transform 0.3s ease;
    display: flex;
    flex-direction: row;
    gap: 2rem;
    padding: 2rem;
}

.project-card-full:hover {
    transform: translateY(-5px);
}

.project-card-img-full {
    flex: 1;
    min-width: 300px;
    max-width: 400px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.project-card-img-full img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.project-card-info-full {
    flex: 2;
    padding: 1rem 0;
}

.project-title-big {
    font-size: 1.5rem;
    color: var(--first-color);
    margin-bottom: 1rem;
    font-weight: 700;
    line-height: 1.4;
}

.project-desc-big {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--second-color);
    margin-bottom: 1.5rem;
    text-align: justify;
}

.project-link-group {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.project-link-full {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--first-color);
    color: #fff;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
    text-align: center;
    min-width: 120px;
}

.project-link-full:hover {
    background-color: var(--second-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.project__subtitle {
    font-size: 1.8rem;
    font-weight: 700;
    margin: 2rem 0 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 3px solid var(--first-color);
    display: inline-block;
}

@media (max-width: 900px) {
    .project-card-full {
        flex-direction: column;
        padding: 1.5rem;
    }

    .project-card-img-full {
        min-width: 100%;
        max-width: 100%;
    }

    .project-title-big {
        font-size: 1.3rem;
    }

    .project-desc-big {
        font-size: 0.95rem;
    }
}

b {
    color: var(--first-color);
    /* màu xanh dương */
}

strong {
    font-weight: normal;
    color: inherit;
}