/* ========================================
   MonPortfolio — Global Styles
   ======================================== */

/* --- CSS Reset --- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* --- Variables --- */
:root {
    --color-bg: #0a0a0a;
    --color-text: #e0e0e0;
    --color-accent: #64ffda;
    --color-muted: #a0a0b8;
    --color-heading: #ffffff;
    --color-card: #111111;
    --color-input-bg: #151515;
    --color-border: #2a2a2a;
    --color-nav-bg: rgba(10, 10, 10, 0.8);
    --color-nav-overlay: rgba(10, 10, 10, 0.95);
    --color-card-shadow: rgba(100, 255, 218, 0.1);
    --font-family: 'Inter', sans-serif;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --radius-sm: 4px;
    --radius-md: 8px;
    --transition-speed: 0.3s;
    --transition-fade: 0.6s ease-out;
    --content-width: 800px;
    --form-width: 600px;
    --photo-size: 200px;
    --blur-nav: 10px;
}

:root.light {
    --color-bg: #ffffff;
    --color-text: #1a1a1a;
    --color-accent: #0a7a5e;
    --color-muted: #555566;
    --color-heading: #1a1a1a;
    --color-card: #f5f5f5;
    --color-input-bg: #f0f0f0;
    --color-border: #d0d0d0;
    --color-nav-bg: rgba(255, 255, 255, 0.8);
    --color-nav-overlay: rgba(255, 255, 255, 0.95);
    --color-card-shadow: rgba(10, 122, 94, 0.1);
}

/* --- Skip link --- */
.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    padding: 0.75rem 1.5rem;
    background-color: var(--color-accent);
    color: var(--color-bg);
    font-weight: 700;
    z-index: 200;
}

.skip-link:focus {
    top: 0;
}

/* --- Base --- */
html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: clamp(1rem, 0.95rem + 0.25vw, 1.1rem);
    line-height: 1.7;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

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

a:hover {
    text-decoration: underline;
}

h1, h2, h3 {
    color: var(--color-heading);
    line-height: 1.2;
    transition: color var(--transition-speed);
}

/* --- Sections --- */
section {
    padding: var(--spacing-lg) var(--spacing-md);
    max-width: var(--content-width);
    margin: 0 auto;
}

/* --- Shared: cards --- */
.project-card,
.blog-card {
    background-color: var(--color-card);
    border-radius: var(--radius-md);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed), background-color var(--transition-speed), color var(--transition-speed);
}

.project-card:hover,
.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--color-card-shadow);
}

/* --- Shared: card titles --- */
.project-card__title,
.blog-card__title {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

/* --- Shared: tag lists --- */
.project-card__tags,
.blog-article__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
}

/* --- Shared: tags --- */
.project-card__tag,
.blog-article__tag {
    font-size: 0.8rem;
    padding: 0.25rem 0.6rem;
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-sm);
    color: var(--color-accent);
    transition: color var(--transition-speed), border-color var(--transition-speed);
}

/* --- Shared: section titles --- */
.about__title,
.projects__title,
.blog__title,
.contact__title {
    font-size: clamp(1.75rem, 1.5rem + 1.25vw, 2rem);
    position: relative;
    display: inline-block;
    padding-bottom: 0.5rem;
    margin-bottom: var(--spacing-md);
}

.about__title::after,
.projects__title::after,
.blog__title::after,
.contact__title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 3rem;
    height: 3px;
    background-color: var(--color-accent);
    border-radius: 2px;
}

.contact__title {
    margin-bottom: var(--spacing-sm);
}

/* --- Nav --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-nav-bg);
    backdrop-filter: blur(var(--blur-nav));
    -webkit-backdrop-filter: blur(var(--blur-nav));
    z-index: 100;
    transition: background-color var(--transition-speed);
}

.nav__logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-heading);
}

.nav__logo:hover {
    text-decoration: none;
    color: var(--color-accent);
}

.nav__list {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
}

.nav__link {
    color: var(--color-text);
    font-size: 0.95rem;
    transition: color var(--transition-speed);
}

.nav__link:hover {
    color: var(--color-accent);
    text-decoration: none;
}

.nav__theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text);
    padding: 4px;
    display: flex;
    align-items: center;
    transition: color var(--transition-speed);
}

.nav__theme-toggle:hover {
    color: var(--color-accent);
}

.nav__theme-icon--moon {
    display: none;
}

:root.light .nav__theme-icon--sun {
    display: none;
}

:root.light .nav__theme-icon--moon {
    display: block;
}

.nav__hamburger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
    z-index: 110;
}

.nav__hamburger-line {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    border-radius: 2px;
    transition: transform var(--transition-speed), opacity var(--transition-speed);
}

.nav__hamburger--active .nav__hamburger-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav__hamburger--active .nav__hamburger-line:nth-child(2) {
    opacity: 0;
}

.nav__hamburger--active .nav__hamburger-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* --- Hero --- */
.hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
}

.hero__title {
    font-size: clamp(2.5rem, 2rem + 3vw, 4rem);
    font-weight: 700;
    color: var(--color-accent);
    text-shadow: 0 2px 8px rgba(100, 255, 218, 0.2);
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

:root.light .hero__title {
    text-shadow: 0 2px 8px rgba(10, 122, 94, 0.15);
}

.hero__subtitle {
    font-size: 1.25rem;
    color: var(--color-accent);
}

.hero__tagline {
    font-size: 1.125rem;
    color: var(--color-muted);
    margin-top: var(--spacing-sm);
}

.hero__actions {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
}

.hero__cta {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.hero__cta:hover {
    background-color: var(--color-accent);
    color: var(--color-bg);
    text-decoration: none;
}

.hero__cta--secondary {
    background-color: transparent;
    border-style: dashed;
}

/* --- About --- */
.about__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.about__photo {
    width: var(--photo-size);
    height: var(--photo-size);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-md);
    object-fit: cover;
    flex-shrink: 0;
}

.about__text {
    color: var(--color-muted);
}

.about__text p + p {
    margin-top: var(--spacing-sm);
}

/* --- Projects --- */
.projects__grid {
    display: grid;
    gap: var(--spacing-md);
}

.project-card {
    overflow: hidden;
}

.project-card__desc,
.project-card__link {
    transition: color var(--transition-speed), border-color var(--transition-speed);
}

.project-card__banner {
    height: 6px;
    background-color: var(--color-accent);
}

.project-card__body {
    padding: 1.5rem;
}

.project-card__desc {
    color: var(--color-muted);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-sm);
}

.project-card__tags {
    margin-bottom: var(--spacing-sm);
}

.project-card__links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.project-card__link {
    font-size: 0.95rem;
}

/* --- Blog --- */
.blog__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.blog-card {
    padding: 1.5rem;
    cursor: pointer;
}

.blog-card:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.blog-card__date {
    font-size: 0.8rem;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.blog-card__excerpt {
    color: var(--color-muted);
    font-size: 0.95rem;
}

.blog-card__date,
.blog-card__excerpt {
    transition: color var(--transition-speed);
}

/* --- Blog article (full view) --- */
.blog-article--open {
    display: block;
}

.blog-article__back {
    display: inline-block;
    margin-bottom: var(--spacing-md);
    font-size: 0.95rem;
    cursor: pointer;
    background: none;
    border: none;
    color: var(--color-accent);
    font-family: var(--font-family);
    padding: 0;
}

.blog-article__back:hover {
    text-decoration: underline;
}

.blog-article__date {
    font-size: 0.85rem;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.blog-article__tags {
    margin-bottom: var(--spacing-md);
}

.blog-article__heading {
    font-size: 1.35rem;
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.blog-article__text {
    color: var(--color-muted);
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-speed);
}

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

.contact__text {
    color: var(--color-muted);
    margin-bottom: var(--spacing-md);
}

.contact__form {
    max-width: var(--form-width);
    margin: 0 auto;
    text-align: left;
}

.contact__field {
    margin-bottom: 1.25rem;
}

.contact__label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.95rem;
}

.contact__input {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--color-input-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: border-color var(--transition-speed);
}

.contact__input:focus {
    border-color: var(--color-accent);
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.contact__textarea {
    resize: vertical;
}

.contact__btn {
    display: block;
    width: 100%;
    padding: 0.75rem;
    background-color: var(--color-accent);
    color: var(--color-bg);
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: opacity var(--transition-speed);
}

.contact__btn:hover {
    opacity: 0.85;
}

.contact__email {
    margin-top: var(--spacing-md);
    font-size: 0.9rem;
    color: var(--color-muted);
}

/* --- Footer --- */
.footer {
    text-align: center;
    padding: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--color-muted);
    border-top: 1px solid var(--color-border);
    opacity: 0.7;
}

.footer__links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin: 0.5rem 0;
}

.footer__link {
    color: var(--color-muted);
    transition: color var(--transition-speed);
}

.footer__link:hover {
    color: var(--color-accent);
    text-decoration: none;
}

.footer__credit {
    margin-top: 0.5rem;
    font-size: 0.8rem;
}

/* --- Fade-in animation --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-fade), transform var(--transition-fade);
}

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

/* --- Reduced motion --- */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition: none !important;
        animation: none !important;
    }
}

/* ========================================
   Responsive
   ======================================== */

/* --- Mobile (< 768px) --- */
@media (max-width: 767px) {
    .nav__hamburger {
        display: flex;
    }

    .nav__list {
        position: fixed;
        inset: 0;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2.5rem;
        background-color: var(--color-nav-overlay);
        backdrop-filter: blur(var(--blur-nav));
        -webkit-backdrop-filter: blur(var(--blur-nav));
        opacity: 0;
        visibility: hidden;
        transition: opacity var(--transition-speed), visibility var(--transition-speed);
    }

    .nav__list--open {
        opacity: 1;
        visibility: visible;
    }

    .nav__link {
        font-size: 1.5rem;
    }
}

/* --- Tablette (>= 768px) --- */
@media (min-width: 768px) {
    .about__content {
        flex-direction: row;
        align-items: center;
    }

    .projects__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* --- Desktop (>= 1024px) --- */
@media (min-width: 1024px) {
    .projects__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}