/* ═══════════════════════════════════════════════════════════════════════════
   AEN Calcul — Main Stylesheet
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── Variables ────────────────────────────────────────────────────────────── */
:root {
    --color-primary:      #1B3A5C;
    --color-primary-dark: #122845;
    --color-primary-mid:  #2D5F8A;
    --color-accent:       #E85D26;
    --color-accent-dark:  #C94E1E;
    --color-bg:           #F4F7FA;
    --color-bg-dark:      #1B3A5C;
    --color-white:        #FFFFFF;
    --color-text:         #1A2B3C;
    --color-text-muted:   #4A6275;
    --color-border:       #D0DCE8;
    --color-result:       #0A7C59;

    --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    --shadow-sm: 0 1px 3px rgba(27,58,92,.08);
    --shadow-md: 0 4px 16px rgba(27,58,92,.12);
    --shadow-lg: 0 8px 32px rgba(27,58,92,.16);

    --container: 1140px;
    --gap: 2rem;
}

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

html { font-size: 16px; scroll-behavior: smooth; }

body {
    font-family: var(--font-base);
    font-size: 1rem;
    line-height: 1.65;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

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

a { color: var(--color-primary-mid); text-decoration: none; transition: color .2s; }
a:hover { color: var(--color-accent); }
a:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 3px; border-radius: 3px; }

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.25;
    color: var(--color-primary);
}
h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.4rem, 3vw, 1.875rem); margin-bottom: 1rem; }
h3 { font-size: 1.125rem; margin-bottom: .5rem; }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

ul, ol { padding-left: 1.5rem; margin-bottom: 1rem; }
li { margin-bottom: .35rem; }

/* ─── Utilities ────────────────────────────────────────────────────────────── */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 1.25rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .75rem 1.5rem;
    font-size: .9375rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all .2s;
    border: 2px solid transparent;
    text-decoration: none;
}
.btn-primary {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}
.btn-primary:hover {
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
    color: #fff;
}
.btn-secondary {
    background: transparent;
    color: var(--color-primary-mid);
    border-color: var(--color-primary-mid);
}
.btn-secondary:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* ─── Header ───────────────────────────────────────────────────────────────── */
.site-header {
    background: var(--color-white);
    border-bottom: 2px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
    gap: 1rem;
}

.site-logo {
    display: flex;
    align-items: baseline;
    gap: .35rem;
    text-decoration: none;
    flex-shrink: 0;
}
.logo-acronym {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: -.02em;
}
.logo-word {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--color-primary-mid);
    letter-spacing: -.01em;
}
.logo-tag {
    font-size: .7rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
    display: none;
}
@media (min-width: 768px) { .logo-tag { display: block; } }

.primary-nav .nav-menu {
    display: flex;
    list-style: none;
    gap: .25rem;
    padding: 0;
    margin: 0;
}
.primary-nav .nav-menu a {
    display: block;
    padding: .5rem .875rem;
    font-size: .9rem;
    font-weight: 500;
    color: var(--color-text);
    border-radius: var(--radius-sm);
    transition: background .2s, color .2s;
}
.primary-nav .nav-menu a:hover,
.primary-nav .nav-menu .current-menu-item > a {
    background: var(--color-bg);
    color: var(--color-primary);
}

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}
.nav-toggle span {
    display: block;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: all .25s;
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

@media (max-width: 767px) {
    .nav-toggle { display: flex; }
    .primary-nav {
        display: none;
        position: absolute;
        top: 70px;
        left: 0; right: 0;
        background: var(--color-white);
        border-bottom: 2px solid var(--color-border);
        padding: 1rem 1.25rem;
        box-shadow: var(--shadow-md);
    }
    .primary-nav.is-open { display: block; }
    .primary-nav .nav-menu { flex-direction: column; gap: .25rem; }
}

/* ─── Hero ─────────────────────────────────────────────────────────────────── */
.hero {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-mid) 100%);
    color: var(--color-white);
    padding: 4rem 0 3rem;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}
@media (max-width: 900px) {
    .hero-content { grid-template-columns: 1fr; }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    background: rgba(232,93,38,.15);
    border: 1px solid rgba(232,93,38,.4);
    color: #FF8A5C;
    font-size: .8125rem;
    font-weight: 600;
    padding: .3rem .75rem;
    border-radius: 20px;
    margin-bottom: 1.25rem;
    letter-spacing: .02em;
}

.hero-title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    color: var(--color-white);
    margin-bottom: 1rem;
    line-height: 1.2;
}
.hero-title .highlight {
    color: #FF8A5C;
}

.hero-subtitle {
    font-size: 1.0625rem;
    color: rgba(255,255,255,.85);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.hero-features {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: .6rem;
}
.hero-features li {
    display: flex;
    align-items: center;
    gap: .6rem;
    font-size: .9375rem;
    color: rgba(255,255,255,.9);
}
.hero-features .check {
    color: #5ECBA1;
    font-size: 1rem;
    font-weight: 700;
    flex-shrink: 0;
}

/* ─── Sections ─────────────────────────────────────────────────────────────── */
.section-light {
    background: var(--color-bg);
    padding: 4rem 0;
}
.section-white {
    background: var(--color-white);
    padding: 4rem 0;
}
.section-dark {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 4rem 0;
}
.section-dark h2 { color: var(--color-white); }
.section-dark p, .section-dark li { color: rgba(255,255,255,.85); }

.section-header { max-width: 700px; margin-bottom: 2.5rem; }
.section-subtitle {
    font-size: 1rem;
    color: rgba(255,255,255,.75);
    margin-bottom: 2rem;
    margin-top: -.5rem;
}

/* ─── Cards ────────────────────────────────────────────────────────────────── */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
@media (max-width: 900px) { .cards-grid { grid-template-columns: 1fr; } }

.card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow .2s, transform .2s;
}
.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}
.card-icon { font-size: 2rem; margin-bottom: 1rem; }
.card-link {
    display: inline-block;
    margin-top: 1rem;
    font-size: .9rem;
    font-weight: 600;
    color: var(--color-accent);
}
.card-link:hover { color: var(--color-accent-dark); }

/* ─── Rates Table ──────────────────────────────────────────────────────────── */
.table-responsive { overflow-x: auto; }
.rates-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .9375rem;
    background: rgba(255,255,255,.06);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.rates-table th {
    background: rgba(255,255,255,.12);
    padding: .875rem 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--color-white);
    font-size: .875rem;
}
.rates-table td {
    padding: .875rem 1rem;
    border-bottom: 1px solid rgba(255,255,255,.08);
    color: rgba(255,255,255,.85);
    vertical-align: middle;
}
.rates-table tr:last-child td { border-bottom: none; }
.rates-table strong { color: #FFD166; }
.table-note {
    margin-top: 1rem;
    font-size: .875rem;
    color: rgba(255,255,255,.6);
}
.table-note a { color: #FF8A5C; }

/* ─── FAQ ──────────────────────────────────────────────────────────────────── */
.faq-list { max-width: 800px; display: flex; flex-direction: column; gap: .75rem; }

.faq-item {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    width: 100%;
    text-align: left;
    padding: 1.25rem 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    transition: background .15s;
}
.faq-question:hover { background: var(--color-bg); }
.faq-icon {
    flex-shrink: 0;
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--color-accent);
    line-height: 1;
    transition: transform .25s;
}
.faq-question[aria-expanded="true"] .faq-icon { transform: rotate(45deg); }

.faq-answer {
    display: none;
    padding: 0 1.5rem 1.25rem;
    font-size: .9375rem;
    color: var(--color-text-muted);
    border-top: 1px solid var(--color-border);
}
.faq-answer.is-open { display: block; }
.faq-answer p:first-child { margin-top: 1rem; }

/* ─── Page Hero ────────────────────────────────────────────────────────────── */
.page-hero {
    background: var(--color-primary);
    color: var(--color-white);
    padding: 2.5rem 0 2rem;
}
.breadcrumb {
    display: flex;
    align-items: center;
    gap: .5rem;
    font-size: .875rem;
    color: rgba(255,255,255,.6);
    margin-bottom: 1rem;
}
.breadcrumb a { color: rgba(255,255,255,.7); }
.breadcrumb a:hover { color: var(--color-white); }

.page-title {
    color: var(--color-white);
    margin-bottom: .75rem;
}
.page-subtitle {
    color: rgba(255,255,255,.8);
    font-size: 1.0625rem;
    max-width: 650px;
}

/* ─── Content Area ─────────────────────────────────────────────────────────── */
.content-area {
    max-width: 800px;
    font-size: 1rem;
    line-height: 1.8;
}
.content-area h2 { margin-top: 2rem; margin-bottom: .875rem; }
.content-area h3 { margin-top: 1.5rem; color: var(--color-primary-mid); }

/* ─── Blog ─────────────────────────────────────────────────────────────────── */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}
.post-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: box-shadow .2s;
}
.post-card:hover { box-shadow: var(--shadow-md); }
.post-card-body { padding: 1.5rem; }
.post-meta { font-size: .8125rem; color: var(--color-text-muted); margin-bottom: .5rem; }
.post-card-title { font-size: 1.125rem; margin-bottom: .75rem; }
.post-card-title a { color: var(--color-primary); }
.post-card-title a:hover { color: var(--color-accent); }

.pagination { margin-top: 2.5rem; display: flex; justify-content: center; }
.pagination .nav-links { display: flex; gap: .5rem; }
.pagination a, .pagination span {
    padding: .5rem .875rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: .9rem;
    font-weight: 500;
}
.pagination .current {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

/* ─── Footer ───────────────────────────────────────────────────────────────── */
.site-footer {
    background: var(--color-primary-dark);
    color: rgba(255,255,255,.8);
    padding: 3.5rem 0 0;
}

.footer-inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2rem;
    padding-bottom: 2.5rem;
}
@media (max-width: 768px) {
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 480px) {
    .footer-inner { grid-template-columns: 1fr; }
}

.site-logo--footer .logo-acronym,
.site-logo--footer .logo-word { color: var(--color-white); }

.footer-desc {
    margin-top: 1rem;
    font-size: .875rem;
    color: rgba(255,255,255,.55);
    line-height: 1.6;
}

.footer-nav h3 {
    color: var(--color-white);
    font-size: .875rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    margin-bottom: 1rem;
}
.footer-nav ul { list-style: none; padding: 0; margin: 0; }
.footer-nav li { margin-bottom: .5rem; }
.footer-nav a {
    font-size: .9rem;
    color: rgba(255,255,255,.6);
    transition: color .2s;
}
.footer-nav a:hover { color: var(--color-white); }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,.1);
    padding: 1.25rem 0;
}
.footer-bottom p {
    font-size: .8125rem;
    color: rgba(255,255,255,.4);
    margin: 0;
}
.footer-bottom strong { color: rgba(255,255,255,.6); }