/* ==========================================================================
   DCA Simulator - Design fintech moderne, clair, accents bleu/vert
   ========================================================================== */

.dca-app {
    --dca-bg: #f7f9fc;
    --dca-surface: #ffffff;
    --dca-text: #0f172a;
    --dca-muted: #64748b;
    --dca-border: #e2e8f0;
    --dca-primary: #0a6cff;
    --dca-primary-dark: #0353c9;
    --dca-accent: #10b981;
    --dca-accent-dark: #059669;
    --dca-shadow: 0 4px 24px -8px rgba(15, 23, 42, 0.08);
    --dca-shadow-lg: 0 20px 50px -20px rgba(10, 108, 255, 0.25);
    --dca-radius: 14px;
    --dca-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto, "Helvetica Neue", Arial, sans-serif;

    font-family: var(--dca-font);
    color: var(--dca-text);
    background: var(--dca-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    margin: 0;
}

.dca-app *, .dca-app *::before, .dca-app *::after { box-sizing: border-box; }

.dca-container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 20px;
}

/* HERO */
.dca-hero {
    padding: 72px 0 56px;
    background: linear-gradient(180deg, #ffffff 0%, var(--dca-bg) 100%);
    text-align: center;
    border-bottom: 1px solid var(--dca-border);
}
.dca-eyebrow {
    display: inline-block;
    padding: 6px 14px;
    background: rgba(10, 108, 255, 0.08);
    color: var(--dca-primary);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 18px;
}
.dca-title {
    font-size: clamp(2rem, 5vw, 3.25rem);
    font-weight: 800;
    letter-spacing: -0.025em;
    margin: 0 0 16px;
    line-height: 1.15;
}
.dca-accent {
    background: linear-gradient(120deg, var(--dca-primary), var(--dca-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.dca-subtitle {
    font-size: clamp(1rem, 2vw, 1.15rem);
    color: var(--dca-muted);
    max-width: 640px;
    margin: 0 auto;
}

/* SECTIONS */
.dca-section {
    padding: 64px 0;
}
.dca-section--alt {
    background: #fff;
    border-top: 1px solid var(--dca-border);
    border-bottom: 1px solid var(--dca-border);
}
.dca-section-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0 0 12px;
}
.dca-section-sub {
    color: var(--dca-muted);
    margin: 0 0 32px;
    max-width: 640px;
}

/* GRID */
.dca-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 28px;
    align-items: start;
}
@media (max-width: 860px) {
    .dca-grid { grid-template-columns: 1fr; }
}

.dca-two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}
@media (max-width: 760px) {
    .dca-two-col { grid-template-columns: 1fr; gap: 32px; }
}

/* CARD */
.dca-card {
    background: var(--dca-surface);
    border: 1px solid var(--dca-border);
    border-radius: var(--dca-radius);
    padding: 28px;
    box-shadow: var(--dca-shadow);
}
.dca-card-title {
    margin: 0 0 22px;
    font-size: 1.25rem;
    font-weight: 700;
}

/* FORM */
.dca-field {
    margin-bottom: 18px;
}
.dca-field-row {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 12px;
}
.dca-field label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--dca-text);
}
.dca-field input,
.dca-field select {
    width: 100%;
    padding: 12px 14px;
    font-size: 1rem;
    font-family: inherit;
    color: var(--dca-text);
    background: #fff;
    border: 1.5px solid var(--dca-border);
    border-radius: 10px;
    transition: border-color 0.15s, box-shadow 0.15s;
    -webkit-appearance: none;
    appearance: none;
}
.dca-field select {
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path fill='%2364748b' d='M6 8L0 0h12z'/></svg>");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 38px;
}
.dca-field input:focus,
.dca-field select:focus {
    outline: none;
    border-color: var(--dca-primary);
    box-shadow: 0 0 0 4px rgba(10, 108, 255, 0.12);
}

/* BUTTON */
.dca-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 14px 24px;
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    color: #fff;
    background: linear-gradient(135deg, var(--dca-primary), var(--dca-accent));
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.2s ease, opacity 0.15s;
    box-shadow: 0 8px 20px -8px rgba(10, 108, 255, 0.5);
}
.dca-btn:hover { transform: translateY(-1px); box-shadow: var(--dca-shadow-lg); }
.dca-btn:active { transform: translateY(0); }
.dca-btn:disabled { opacity: 0.6; cursor: wait; }

.dca-disclaimer {
    margin: 14px 0 0;
    font-size: 0.78rem;
    color: var(--dca-muted);
    text-align: center;
}

/* RESULTS */
.dca-results {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    align-content: start;
}
.dca-stat {
    padding: 22px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    transition: transform 0.3s ease;
}
.dca-stat--hero {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, var(--dca-primary), var(--dca-accent));
    color: #fff;
    border: none;
    box-shadow: var(--dca-shadow-lg);
}
.dca-stat--hero .dca-stat-label { color: rgba(255, 255, 255, 0.85); }
.dca-stat--hero .dca-stat-value { color: #fff; font-size: 2rem; }
.dca-stat-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--dca-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.dca-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    font-variant-numeric: tabular-nums;
}
.dca-positive { color: var(--dca-accent-dark); }

/* Animation lors du calcul */
@keyframes dca-pop {
    0%   { transform: scale(0.96); opacity: 0.4; }
    60%  { transform: scale(1.02); opacity: 1; }
    100% { transform: scale(1); }
}
.dca-stat.is-animating { animation: dca-pop 0.45s cubic-bezier(0.34, 1.56, 0.64, 1); }

/* CHART */
.dca-chart-card {
    padding: 24px;
}
#dca-chart {
    width: 100% !important;
    height: 380px !important;
    max-height: 60vh;
}

/* LISTES & TYPO */
.dca-h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 16px;
}
.dca-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.dca-list li {
    padding: 12px 0 12px 28px;
    position: relative;
    border-bottom: 1px solid var(--dca-border);
}
.dca-list li:last-child { border-bottom: none; }
.dca-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 12px;
    width: 20px;
    height: 20px;
    background: rgba(16, 185, 129, 0.12);
    color: var(--dca-accent-dark);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
}

/* FAQ */
.dca-faq {
    display: grid;
    gap: 14px;
}
.dca-faq details {
    padding: 0;
    overflow: hidden;
}
.dca-faq summary {
    list-style: none;
    cursor: pointer;
    padding: 22px 28px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
}
.dca-faq summary::-webkit-details-marker { display: none; }
.dca-faq summary h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
}
.dca-faq summary::after {
    content: "+";
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--dca-primary);
    transition: transform 0.2s;
}
.dca-faq details[open] summary::after { content: "−"; }
.dca-faq details p {
    margin: 0;
    padding: 0 28px 22px;
    color: var(--dca-muted);
}

/* ADS */
.dca-ad {
    margin: 24px auto;
    text-align: center;
    min-height: 90px;
}
.dca-ad--top    { margin: 16px auto 0; max-width: 1140px; padding: 0 20px; }
.dca-ad--inline { margin: 32px 0; }
.dca-ad--footer { margin: 40px 0 16px; }

/* FOOTER */
.dca-footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 32px 0;
    text-align: center;
    font-size: 0.875rem;
}
.dca-footer p { margin: 0; }

/* RESPONSIVE */
@media (max-width: 600px) {
    .dca-section { padding: 44px 0; }
    .dca-hero    { padding: 56px 0 40px; }
    .dca-card    { padding: 22px; }
    .dca-results { grid-template-columns: 1fr; }
    .dca-stat-value { font-size: 1.35rem; }
    .dca-stat--hero .dca-stat-value { font-size: 1.75rem; }
}

/* ACCESSIBILITÉ - réduction de mouvement */
@media (prefers-reduced-motion: reduce) {
    .dca-app * { animation: none !important; transition: none !important; }
}