/*
Theme Name: Ueber-Setzen
Theme URI: https://ueber-setzen.com
Author: Ueber-Setzen
Author URI: https://ueber-setzen.com
Description: Magazine professionnel dedié a la traduction, aux langues et a la communication internationale. Guides experts pour professionnels et entreprises.
Version: 1.0.0
Requires at least: 6.0
Tested up to: 6.4
Requires PHP: 8.0
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: ueber-setzen
Tags: blog, business, education, custom-logo, custom-menu, featured-images, translation

Ueber-Setzen - L'art de faire passer le message.
*/

/* ================================
   DESIGN TOKENS
   ================================ */
:root {
    /* Light Theme - Fond éditorial */
    --us-bg-primary: #fafaf9;
    --us-bg-secondary: #ffffff;
    --us-bg-tertiary: #f5f5f4;
    --us-bg-card: #ffffff;
    --us-bg-elevated: #ffffff;
    
    /* Brand Colors - Bleu profond & Or */
    --us-primary: #1e3a5f;
    --us-primary-light: #2d4a6f;
    --us-primary-dark: #152a47;
    --us-accent: #c9a227;
    --us-accent-light: #d4b23d;
    --us-accent-muted: rgba(201, 162, 39, 0.12);
    
    /* Text Colors */
    --us-text-primary: #1a1a1a;
    --us-text-secondary: #4a4a4a;
    --us-text-muted: #737373;
    --us-text-light: #a3a3a3;
    --us-text-inverse: #ffffff;
    
    /* Borders & Surfaces */
    --us-border: #e5e5e5;
    --us-border-light: #f0f0f0;
    --us-border-dark: #d4d4d4;
    --us-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --us-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
    --us-shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08);
    --us-shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.1);
    
    /* Typography - Serif + Sans-serif combo */
    --us-font-serif: 'Lora', Georgia, 'Times New Roman', serif;
    --us-font-sans: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing & Layout */
    --us-container: 1140px;
    --us-container-narrow: 720px;
    --us-radius-sm: 4px;
    --us-radius-md: 6px;
    --us-radius-lg: 8px;
    --us-radius-xl: 12px;
    
    /* Transitions */
    --us-transition-fast: 0.15s ease;
    --us-transition-base: 0.25s ease;
    --us-transition-slow: 0.4s ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 16px;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--us-font-sans);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--us-text-primary);
    background: var(--us-bg-primary);
}

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

a {
    color: var(--us-primary);
    text-decoration: none;
    transition: color var(--us-transition-fast);
}

a:hover {
    color: var(--us-accent);
}

::selection {
    background: var(--us-accent-muted);
    color: var(--us-primary-dark);
}

/* ================================
   TYPOGRAPHY
   ================================ */
h1, h2, h3, h4, h5, h6 {
    margin: 0;
    font-family: var(--us-font-serif);
    font-weight: 600;
    line-height: 1.3;
    color: var(--us-text-primary);
    letter-spacing: -0.01em;
}

h1 { font-size: 2.75rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin: 0 0 1.5rem 0;
}

.us-lead {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--us-text-secondary);
}

.us-small {
    font-size: 0.875rem;
}

.us-caps {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--us-text-muted);
}

/* ================================
   LAYOUT
   ================================ */
.us-container {
    width: 100%;
    max-width: var(--us-container);
    margin: 0 auto;
    padding: 0 24px;
}

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

.us-section {
    padding: 80px 0;
}

.us-section--alt {
    background: var(--us-bg-secondary);
}

.us-section--bordered {
    border-top: 1px solid var(--us-border);
}

/* ================================
   BUTTONS
   ================================ */
.us-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-family: var(--us-font-sans);
    font-size: 0.9375rem;
    font-weight: 600;
    line-height: 1;
    border-radius: var(--us-radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--us-transition-base);
    text-decoration: none;
}

.us-btn--primary {
    background: var(--us-primary);
    color: var(--us-text-inverse);
}

.us-btn--primary:hover {
    background: var(--us-primary-dark);
    color: var(--us-text-inverse);
    transform: translateY(-1px);
    box-shadow: var(--us-shadow-md);
}

.us-btn--secondary {
    background: transparent;
    color: var(--us-primary);
    border: 1.5px solid var(--us-border-dark);
}

.us-btn--secondary:hover {
    border-color: var(--us-primary);
    background: var(--us-bg-tertiary);
}

.us-btn--accent {
    background: var(--us-accent);
    color: var(--us-primary-dark);
}

.us-btn--accent:hover {
    background: var(--us-accent-light);
    transform: translateY(-1px);
    box-shadow: var(--us-shadow-md);
}

.us-btn--sm {
    padding: 8px 16px;
    font-size: 0.8125rem;
}

.us-btn--lg {
    padding: 16px 32px;
    font-size: 1rem;
}

/* ================================
   CARDS
   ================================ */
.us-card {
    background: var(--us-bg-card);
    border: 1px solid var(--us-border-light);
    border-radius: var(--us-radius-lg);
    overflow: hidden;
    transition: all var(--us-transition-base);
}

.us-card:hover {
    border-color: var(--us-border);
    box-shadow: var(--us-shadow-lg);
    transform: translateY(-2px);
}

.us-card__image {
    width: 100%;
    aspect-ratio: 16/10;
    object-fit: cover;
}

.us-card__content {
    padding: 24px;
}

.us-card__category {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--us-accent);
    margin-bottom: 12px;
}

.us-card__title {
    font-family: var(--us-font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.4;
    margin: 0 0 12px 0;
    color: var(--us-text-primary);
}

.us-card__title a {
    color: inherit;
}

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

.us-card__excerpt {
    font-size: 0.9375rem;
    color: var(--us-text-secondary);
    line-height: 1.6;
    margin: 0 0 16px 0;
}

.us-card__meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.8125rem;
    color: var(--us-text-muted);
}

/* ================================
   HEADER
   ================================ */
.us-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--us-border-light);
    transition: all var(--us-transition-base);
}

.us-header--scrolled {
    box-shadow: var(--us-shadow-sm);
}

.us-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.us-header__actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.us-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--us-font-serif);
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--us-primary);
    letter-spacing: -0.02em;
}

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

.us-logo__mark {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--us-primary);
    border-radius: var(--us-radius-md);
    color: var(--us-text-inverse);
}

.us-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.us-nav__link {
    padding: 8px 16px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--us-text-secondary);
    border-radius: var(--us-radius-md);
    transition: all var(--us-transition-fast);
}

.us-nav__link:hover {
    color: var(--us-text-primary);
    background: var(--us-bg-tertiary);
}

.us-nav__link--active {
    color: var(--us-primary);
    background: var(--us-accent-muted);
}

/* Mobile Menu Toggle */
.us-menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--us-radius-md);
    color: var(--us-text-primary);
    cursor: pointer;
    transition: all var(--us-transition-fast);
}

.us-menu-toggle:hover {
    background: var(--us-bg-tertiary);
}

/* Mobile Navigation */
.us-mobile-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--us-bg-secondary);
    border-bottom: 1px solid var(--us-border);
    box-shadow: var(--us-shadow-lg);
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
    transition: all var(--us-transition-base);
}

.us-mobile-nav.is-open {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.us-mobile-nav__inner {
    display: flex;
    flex-direction: column;
    padding: 24px 0;
}

.us-mobile-nav__link {
    display: block;
    padding: 14px 0;
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--us-text-primary);
    border-bottom: 1px solid var(--us-border-light);
}

.us-mobile-nav__link:last-of-type {
    border-bottom: none;
}

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

/* ================================
   STATS SECTION
   ================================ */
.us-stats__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 48px;
    text-align: center;
}

.us-stat {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.us-stat__number {
    font-family: var(--us-font-serif);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--us-primary);
    line-height: 1;
}

.us-stat__label {
    font-size: 0.9375rem;
    color: var(--us-text-muted);
    line-height: 1.5;
} {
    color: var(--us-primary);
    background: var(--us-accent-muted);
}

/* Mobile menu button */
.us-menu-toggle {
    display: none;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--us-text-primary);
}

/* ================================
   FOOTER
   ================================ */
.us-footer {
    background: var(--us-primary);
    color: var(--us-text-inverse);
    padding: 64px 0 32px;
}

.us-footer a {
    color: rgba(255, 255, 255, 0.7);
}

.us-footer a:hover {
    color: var(--us-accent);
}

.us-footer__grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 48px;
    margin-bottom: 48px;
}

.us-footer__brand {
    max-width: 260px;
}

.us-footer__brand .us-logo {
    color: var(--us-text-inverse);
    margin-bottom: 16px;
}

.us-footer__brand .us-logo__mark {
    background: var(--us-accent);
    color: var(--us-primary-dark);
}

.us-footer__tagline {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
}

.us-footer__title {
    font-family: var(--us-font-sans);
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--us-accent);
    margin-bottom: 20px;
}

.us-footer__links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.us-footer__links li {
    margin-bottom: 12px;
}

.us-footer__links a {
    font-size: 0.9375rem;
}

.us-footer__bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.5);
}

.us-footer__legal {
    display: flex;
    gap: 24px;
}

/* ================================
   ARTICLE STYLES
   ================================ */
.us-article {
    background: var(--us-bg-secondary);
}

.us-article__header {
    padding: 100px 0 48px;
    text-align: center;
    border-bottom: 1px solid var(--us-border);
}

.us-article__category {
    display: inline-block;
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--us-accent);
    margin-bottom: 20px;
}

.us-article__title {
    font-size: 2.5rem;
    font-weight: 600;
    max-width: 800px;
    margin: 0 auto 24px;
    line-height: 1.25;
}

.us-article__meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    font-size: 0.9375rem;
    color: var(--us-text-muted);
}

.us-article__meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.us-article__featured {
    max-width: 900px;
    margin: 48px auto 0;
    border-radius: var(--us-radius-xl);
    overflow: hidden;
    box-shadow: var(--us-shadow-lg);
}

.us-article__featured img {
    width: 100%;
    aspect-ratio: 16/9;
    object-fit: cover;
}

.us-article__content {
    max-width: var(--us-container-narrow);
    margin: 0 auto;
    padding: 48px 24px 80px;
}

.us-article__content p {
    font-size: 1.125rem;
    line-height: 1.85;
    color: var(--us-text-secondary);
}

.us-article__content h2 {
    margin: 48px 0 24px;
}

.us-article__content h3 {
    margin: 36px 0 18px;
}

.us-article__content ul,
.us-article__content ol {
    margin: 0 0 1.5rem 0;
    padding-left: 1.5rem;
}

.us-article__content li {
    margin-bottom: 0.5rem;
    font-size: 1.125rem;
    line-height: 1.85;
    color: var(--us-text-secondary);
}

.us-article__content blockquote {
    margin: 32px 0;
    padding: 24px 32px;
    background: var(--us-bg-tertiary);
    border-left: 3px solid var(--us-accent);
    font-family: var(--us-font-serif);
    font-size: 1.25rem;
    font-style: italic;
    color: var(--us-text-primary);
}

/* ================================
   ARCHIVE / CATEGORY
   ================================ */
.us-archive__header {
    padding: 100px 0 48px;
    text-align: center;
    background: var(--us-bg-secondary);
    border-bottom: 1px solid var(--us-border);
}

.us-archive__label {
    font-size: 0.6875rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--us-accent);
    margin-bottom: 12px;
}

.us-archive__title {
    font-size: 2.25rem;
    margin: 0 0 16px 0;
}

.us-archive__description {
    font-size: 1.125rem;
    color: var(--us-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.us-archive__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    padding: 64px 0;
}

/* ================================
   PAGINATION
   ================================ */
.us-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 48px 0;
    border-top: 1px solid var(--us-border);
}

.us-pagination a,
.us-pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--us-text-secondary);
    background: var(--us-bg-secondary);
    border: 1px solid var(--us-border);
    border-radius: var(--us-radius-md);
    transition: all var(--us-transition-fast);
}

.us-pagination a:hover {
    color: var(--us-primary);
    border-color: var(--us-primary);
    background: var(--us-bg-secondary);
}

.us-pagination .current {
    background: var(--us-primary);
    color: var(--us-text-inverse);
    border-color: var(--us-primary);
}

/* ================================
   FORMS
   ================================ */
.us-input {
    width: 100%;
    padding: 14px 18px;
    font-family: var(--us-font-sans);
    font-size: 1rem;
    color: var(--us-text-primary);
    background: var(--us-bg-secondary);
    border: 1.5px solid var(--us-border);
    border-radius: var(--us-radius-md);
    outline: none;
    transition: all var(--us-transition-fast);
}

.us-input:focus {
    border-color: var(--us-primary);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.1);
}

.us-input::placeholder {
    color: var(--us-text-light);
}

/* ================================
   UTILITIES
   ================================ */
.us-text-center { text-align: center; }
.us-text-left { text-align: left; }
.us-text-right { text-align: right; }

.us-mt-0 { margin-top: 0; }
.us-mb-0 { margin-bottom: 0; }
.us-mt-1 { margin-top: 8px; }
.us-mb-1 { margin-bottom: 8px; }
.us-mt-2 { margin-top: 16px; }
.us-mb-2 { margin-bottom: 16px; }
.us-mt-3 { margin-top: 24px; }
.us-mb-3 { margin-bottom: 24px; }
.us-mt-4 { margin-top: 32px; }
.us-mb-4 { margin-bottom: 32px; }

.us-hidden { display: none; }
.us-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;
}

/* ================================
   RESPONSIVE
   ================================ */
@media (max-width: 1024px) {
    .us-footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .us-archive__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .us-stats__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 15px;
    }
    
    .us-section {
        padding: 60px 0;
    }
    
    .us-container {
        padding: 0 20px;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.625rem; }
    
    .us-nav {
        display: none;
    }
    
    .us-menu-toggle {
        display: flex;
    }
    
    .us-mobile-nav {
        display: block;
    }
    
    .us-header__cta {
        display: none;
    }
    
    .us-footer__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .us-footer__bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .us-archive__grid {
        grid-template-columns: 1fr;
    }
    
    .us-article__title {
        font-size: 1.875rem;
    }
    
    .us-article__content {
        padding: 32px 20px 60px;
    }
    
    .us-stats__grid {
        grid-template-columns: 1fr 1fr;
        gap: 24px;
    }
    
    .us-stat__number {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .us-btn {
        width: 100%;
    }
    
    .us-card__content {
        padding: 20px;
    }
}