/* ==========================================================================
   Variables CSS
   ========================================================================== */

:root {
    /* Couleurs - Mode sombre (défaut) */
    --color-bg: #0a0a0a;
    --color-text: #e0e0e0;
    --color-accent: #5ce0c6;
    --color-accent-alpha: rgba(92, 224, 198, 0.1);
    --color-text-muted: #b0b8d0;
    --color-card-bg: rgba(255, 255, 255, 0.05);
    --color-border: rgba(255, 255, 255, 0.15);
    --color-header-bg: rgba(10, 10, 10, 0.85);

    /* Logo */
    --color-logo-symbol: #64ffda;
    --color-logo-text: #e6e6e6;
    --color-logo-accent: #64ffda;

    /* Typographie - Familles */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Typographie - Tailles */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: clamp(1rem, 0.95rem + 0.25vw, 1.1rem);
    --font-size-lg: clamp(1.1rem, 1rem + 0.5vw, 1.25rem);
    --font-size-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
    --font-size-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
    --font-size-3xl: clamp(2rem, 1.5rem + 2.5vw, 3.5rem);

    /* Typographie - Poids */
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Typographie - Line heights */
    --line-height-tight: 1.2;
    --line-height-normal: 1.6;
    --line-height-relaxed: 1.7;
    --line-height-loose: 1.8;

    /* Espacement */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Dimensions - Max widths */
    --max-width-content: 1200px;
    --max-width-medium: 900px;
    --max-width-narrow: 800px;
    --max-width-form: 600px;
    --max-width-text: 500px;

    /* Dimensions - Composants */
    --size-photo: 200px;
    --size-icon: 24px;
    --size-nav-toggle: 30px;
    --min-height-textarea: 150px;
    --height-banner: 8px;

    /* Rayons de bordure */
    --radius-xs: 2px;
    --radius-sm: 4px;
    --radius-md: 8px;

    /* Ombres */
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.3);

    /* Z-index */
    --z-header: 100;
    --z-overlay: 102;

    /* Effets */
    --blur-header: blur(10px);
    --opacity-muted: 0.7;
    --opacity-hover: 0.8;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 600ms ease-out;
}

/* Mode clair */
:root.light-mode {
    --color-bg: #ffffff;
    --color-text: #1a1a1a;
    --color-accent: #0d9373;
    --color-accent-alpha: rgba(13, 147, 115, 0.1);
    --color-text-muted: #555555;
    --color-card-bg: #f5f5f5;
    --color-border: rgba(0, 0, 0, 0.1);
    --color-header-bg: rgba(255, 255, 255, 0.85);

    /* Logo */
    --color-logo-symbol: #0d9488;
    --color-logo-text: #333333;
    --color-logo-accent: #0d9488;
}

/* ==========================================================================
   Reset CSS
   ========================================================================== */

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

html {
    scroll-behavior: smooth;
}

ul,
ol {
    list-style: none;
}

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

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

/* Screen reader only - accessible but hidden */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ==========================================================================
   Base
   ========================================================================== */

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* ==========================================================================
   Accessibilité - Focus visible
   ========================================================================== */

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: var(--radius-xs);
}

/* Skip link pour navigation clavier */
.skip-link {
    position: absolute;
    top: -100%;
    left: var(--spacing-sm);
    background-color: var(--color-accent);
    color: var(--color-bg);
    padding: var(--spacing-xs) var(--spacing-sm);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-sm);
    z-index: 1000;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: var(--spacing-sm);
}

/* ==========================================================================
   Typographie
   ========================================================================== */

h1,
h2,
h3 {
    line-height: var(--line-height-tight);
    font-weight: var(--font-weight-semibold);
}

h1 {
    font-size: var(--font-size-3xl);
}

h2 {
    font-size: var(--font-size-2xl);
}

h3 {
    font-size: var(--font-size-xl);
}

.section__title {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    display: inline-block;
    padding-bottom: var(--spacing-xs);
    position: relative;
}

.section__title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 3rem;
    height: 3px;
    background-color: var(--color-accent);
    border-radius: var(--radius-xs);
}

/* ==========================================================================
   Layout
   ========================================================================== */

section {
    padding: var(--spacing-xl) var(--spacing-md);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-header-bg);
    backdrop-filter: var(--blur-header);
    -webkit-backdrop-filter: var(--blur-header);
    z-index: var(--z-header);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: background-color var(--transition-base);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: var(--max-width-content);
    margin: 0 auto;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    z-index: var(--z-overlay);
    text-decoration: none;
}

.nav__logo-symbol {
    height: 32px;
    width: 32px;
    flex-shrink: 0;
}

.nav__logo-symbol {
    color: var(--color-logo-symbol);
}

.nav__logo-symbol path {
    stroke: currentColor;
}

.nav__logo-symbol g {
    stroke: currentColor;
}

.nav__logo-symbol circle {
    fill: currentColor;
}

.nav__logo-text {
    font-family: 'Montserrat', 'Inter', sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.5px;
    line-height: 1;
    color: var(--color-logo-text);
}

.nav__logo-text span {
    color: var(--color-logo-accent);
}

.nav__toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: var(--size-nav-toggle);
    height: var(--size-nav-toggle);
    background: none;
    border: none;
    cursor: pointer;
    z-index: var(--z-overlay);
}

.nav__toggle-bar {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav__toggle.is-active .nav__toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav__toggle.is-active .nav__toggle-bar:nth-child(2) {
    opacity: 0;
}

.nav__toggle.is-active .nav__toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.nav__list {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-bg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

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

.nav__link {
    color: var(--color-text-muted);
    font-size: var(--font-size-xl);
    transition: color var(--transition-fast);
}

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

/* Theme Toggle */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    transition: color var(--transition-base);
    z-index: var(--z-overlay);
}

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

.theme-toggle__icon {
    width: var(--size-icon);
    height: var(--size-icon);
    transition: transform var(--transition-base);
}

.theme-toggle:hover .theme-toggle__icon {
    transform: rotate(15deg);
}

.theme-toggle__icon--sun {
    display: none;
}

.theme-toggle__icon--moon {
    display: block;
}

:root.light-mode .theme-toggle__icon--sun {
    display: block;
}

:root.light-mode .theme-toggle__icon--moon {
    display: none;
}

/* ==========================================================================
   Hero
   ========================================================================== */

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

.hero__content {
    max-width: var(--max-width-narrow);
}

.hero__title {
    color: var(--color-accent);
    font-size: clamp(2.5rem, 2rem + 3vw, 4rem);
    font-weight: var(--font-weight-bold);
    text-align: center;
    text-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    margin-bottom: var(--spacing-xs);
}

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

.hero__description {
    max-width: var(--max-width-text);
    margin: 0 auto var(--spacing-md);
    color: var(--color-text-muted);
}

.hero__cta {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-accent);
    color: var(--color-accent);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
}

.hero__cta:hover {
    background-color: var(--color-accent-alpha);
}

/* ==========================================================================
   About
   ========================================================================== */

.about__content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: var(--max-width-medium);
}

.about__photo {
    width: var(--size-photo);
    height: var(--size-photo);
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    margin: 0 auto;
}

.about__text-wrapper {
    flex: 1;
}

.about__text {
    color: var(--color-text-muted);
    line-height: var(--line-height-loose);
}

/* ==========================================================================
   Cards (shared styles)
   ========================================================================== */

.card {
    background-color: var(--color-card-bg);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-base);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card__content {
    padding: var(--spacing-md);
}

.card__title {
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-xl);
    transition: color var(--transition-base);
}

.card__description {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-normal);
    transition: color var(--transition-base);
}

.card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

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

.card__tag {
    background-color: var(--color-accent-alpha);
    color: var(--color-accent);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    transition: background-color var(--transition-base), color var(--transition-base);
}

.card__link {
    color: var(--color-accent);
    font-size: var(--font-size-sm);
    transition: opacity var(--transition-fast), color var(--transition-base);
}

.card__link:hover {
    opacity: var(--opacity-hover);
}

/* ==========================================================================
   Projects
   ========================================================================== */

.projects__grid {
    display: grid;
    gap: var(--spacing-md);
    max-width: var(--max-width-content);
}

.project-card__banner {
    height: var(--height-banner);
    background-color: var(--color-accent);
    transition: background-color var(--transition-base);
}

.projects__loading,
.projects__error {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--color-text-muted);
}

.projects__error {
    color: #ff6b6b;
}

/* ==========================================================================
   Contact
   ========================================================================== */

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

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

.form__label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
    font-size: var(--font-size-sm);
}

.form__input,
.form__textarea {
    width: 100%;
    padding: var(--spacing-sm);
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast), background-color var(--transition-base);
}

.form__input:focus,
.form__textarea:focus {
    outline: none;
    border-color: var(--color-accent);
}

.form__textarea {
    resize: vertical;
    min-height: var(--min-height-textarea);
}

.form__button {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-accent);
    border: none;
    color: var(--color-bg);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.form__button:hover {
    opacity: 0.9;
}

/* Indicateur de champ requis */
.form__required {
    color: #ff6b6b;
    margin-left: 0.25rem;
}

/* Messages d'erreur du formulaire */
.form__error {
    display: block;
    color: #ff6b6b;
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
    min-height: 1.25rem;
}

/* Message de succès du formulaire */
.form__success {
    background-color: var(--color-accent-alpha);
    color: var(--color-accent);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-sm);
    text-align: center;
}

/* Champ en erreur */
.form__input--error,
.form__textarea--error {
    border-color: #ff6b6b;
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    border-top: 1px solid var(--color-border);
    transition: border-color var(--transition-base);
}

.footer__text {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.footer__links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.footer__link {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

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

.footer__credit {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ==========================================================================
   Blog
   ========================================================================== */

.blog {
    padding-top: calc(var(--spacing-xl) + 60px);
}

.blog__list {
    display: grid;
    gap: var(--spacing-md);
    max-width: var(--max-width-medium);
}

.blog__loading,
.blog__error {
    color: var(--color-text-muted);
    text-align: center;
    padding: var(--spacing-lg);
}

.blog__error {
    color: #ff6b6b;
}

/* Blog card specific */
.blog-card__link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.blog-card__date {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.card:hover .card__title--hover {
    color: var(--color-accent);
}

.blog-card__excerpt {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-sm);
}

/* Post (article unique) */
.post {
    padding-top: calc(var(--spacing-xl) + 60px);
    padding-bottom: var(--spacing-xl);
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

.post__back {
    display: inline-block;
    color: var(--color-accent);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
    transition: opacity var(--transition-fast);
}

.post__back:hover {
    opacity: var(--opacity-hover);
}

.post__content {
    max-width: var(--max-width-narrow);
    margin: 0 auto;
}

.post__content h1 {
    margin-bottom: var(--spacing-sm);
}

.post__content h2 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.post__content h3 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.post__content p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-muted);
    line-height: var(--line-height-loose);
}

.post__content ul,
.post__content ol {
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-md);
    color: var(--color-text-muted);
}

.post__content li {
    margin-bottom: var(--spacing-xs);
    line-height: var(--line-height-relaxed);
}

.post__content ul {
    list-style: disc;
}

.post__content ol {
    list-style: decimal;
}

.post__content a {
    color: var(--color-accent);
    text-decoration: underline;
}

.post__content a:hover {
    opacity: var(--opacity-hover);
}

.post__content strong {
    color: var(--color-text);
    font-weight: var(--font-weight-semibold);
}

.post__content em {
    color: var(--color-text-muted);
    font-style: italic;
}

.post__content blockquote {
    border-left: 3px solid var(--color-accent);
    padding-left: var(--spacing-sm);
    margin: var(--spacing-md) 0;
    color: var(--color-text-muted);
    font-style: italic;
}

.post__content hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--spacing-lg) 0;
}

.post__content pre {
    background-color: #282c34;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    overflow-x: auto;
    margin-bottom: var(--spacing-sm);
}

.post__content code {
    font-family: 'Fira Code', 'Monaco', 'Consolas', monospace;
    font-size: var(--font-size-sm);
}

.post__content p code {
    background-color: var(--color-card-bg);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-xs);
    color: var(--color-accent);
}

/* Nav link active state */
.nav__link--active {
    color: var(--color-accent);
}

/* ==========================================================================
   Animations
   ========================================================================== */

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* Respect des préférences de mouvement réduit */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ==========================================================================
   Media Queries
   ========================================================================== */

/* Tablette petite (600px) */
@media (min-width: 600px) {
    .projects__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Tablette (768px) */
@media (min-width: 768px) {
    section {
        padding: var(--spacing-xl) var(--spacing-lg);
    }

    .nav__toggle {
        display: none;
    }

    .nav__list {
        position: static;
        flex-direction: row;
        background-color: transparent;
        gap: var(--spacing-md);
        opacity: 1;
        visibility: visible;
    }

    .nav__link {
        font-size: var(--font-size-base);
    }

    .about__content {
        flex-direction: row;
        align-items: center;
    }

    .about__photo {
        margin: 0;
    }
}

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

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

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

/* ==========================================================================
   Services
   ========================================================================== */

.services {
    padding: var(--spacing-xl) var(--spacing-md);
    max-width: var(--max-width-content);
    margin: 0 auto;
}

.services__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.service-card {
    background-color: var(--color-card-bg);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-base);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.service-card__title {
    color: var(--color-accent);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-base);
}

.service-card__description {
    color: var(--color-text-muted);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-base);
}

.service-card__clients {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    font-style: italic;
    opacity: 0.8;
    transition: color var(--transition-base);
}

/* ==========================================================================
   Parcours — Timeline
   ========================================================================== */

.parcours {
    padding: var(--spacing-xl) var(--spacing-md);
    max-width: var(--max-width-medium);
    margin: 0 auto;
}

.timeline {
    position: relative;
    margin-top: var(--spacing-lg);
    padding-left: var(--spacing-md);
    border-left: 2px solid var(--color-border);
}

.timeline__item {
    position: relative;
    margin-bottom: var(--spacing-lg);
}

.timeline__item::before {
    content: '';
    position: absolute;
    left: calc(-1 * var(--spacing-md) - 5px);
    top: 0.4rem;
    width: 10px;
    height: 10px;
    background-color: var(--color-accent);
    border-radius: 50%;
}

.timeline__date {
    display: inline-block;
    color: var(--color-accent);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-xs);
}

.timeline__title {
    color: var(--color-text);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xs);
    transition: color var(--transition-base);
}

.timeline__details {
    list-style: none;
    padding: 0;
    color: var(--color-text-muted);
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    transition: color var(--transition-base);
}

.timeline__details li {
    padding-left: 1.2rem;
    position: relative;
    margin-bottom: 0.25rem;
}

.timeline__details li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6em;
    width: 6px;
    height: 6px;
    background-color: var(--color-accent);
    border-radius: 50%;
}

/* ==========================================================================
   Stack technique
   ========================================================================== */

.stack {
    margin-top: var(--spacing-xl);
}

.stack__title {
    color: var(--color-text);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
    text-align: center;
    transition: color var(--transition-base);
}

.stack__list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xs);
    list-style: none;
    padding: 0;
}

.stack__tag {
    background-color: var(--color-accent-alpha);
    color: var(--color-accent);
    padding: 0.4rem 1rem;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* ==========================================================================
   Nav active link
   ========================================================================== */

.nav__link--active {
    color: var(--color-accent);
}

/* ==========================================================================
   CTA Banner — Assistant IA
   ========================================================================== */

.cta-banner {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-md);
    background-color: var(--color-accent-alpha);
    text-align: center;
}

.cta-banner__text {
    color: var(--color-text);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-base);
}

.cta-banner__button {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    background-color: var(--color-accent);
    color: #0a0a0a;
    border: none;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: opacity var(--transition-fast);
}

.cta-banner__button:hover {
    opacity: 0.85;
}

.cta-banner--compact {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
}

.cta-banner--compact .cta-banner__text {
    margin-bottom: 0;
    font-size: var(--font-size-sm);
}

.cta-banner__link {
    background: none;
    border: none;
    color: var(--color-accent);
    font-size: inherit;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    text-decoration: underline;
    padding: 0;
    transition: opacity var(--transition-fast);
}

.cta-banner__link:hover {
    opacity: 0.85;
}