/* ==============================
   DESIGN SYSTEM & CUSTOM CONFIG
   ============================== */

:root {
    /* Palette shadcn-style (neutre et élégante) */
    --color-bg: #FFFFFF;
    --color-fg: #09090B;
    --color-card: #FFFFFF;
    --color-card-fg: #09090B;

    --color-primary: #18181B;
    --color-primary-fg: #FAFAFA;

    --color-muted: #F4F4F5;
    --color-muted-fg: #71717A;

    --color-accent: #F4F4F5;
    --color-accent-fg: #18181B;

    --color-border: #E4E4E7;
    --color-input: #E4E4E7;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Spacing */
    --spacing-section-mobile: 60px;
    --spacing-section-desktop: 80px;

    /* Max width */
    --max-width: 1200px;

    /* Border radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

/* ==============================
   BASE STYLES
   ============================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-fg);
    background-color: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==============================
   CONTAINER
   ============================== */

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

@media (min-width: 768px) {
    .container {
        padding: 0 40px;
    }
}

/* ==============================
   HEADER
   ============================== */

.header {
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-bg);
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-fg);
}

.logo-icon {
    font-size: 1.5rem;
}

/* ==============================
   SECTIONS
   ============================== */

.section {
    padding: var(--spacing-section-mobile) 0;
}

@media (min-width: 768px) {
    .section {
        padding: var(--spacing-section-desktop) 0;
    }
}

.section-gray {
    background-color: var(--color-muted);
}

.section-cta {
    background-color: var(--color-primary);
    color: var(--color-primary-fg);
}

.section-cta .section-title {
    color: var(--color-primary-fg);
}

/* ==============================
   HERO SECTION
   ============================== */

.hero-section {
    padding: 60px 0;
    text-align: center;
}

@media (min-width: 768px) {
    .hero-section {
        padding: 100px 0;
    }
}

.hero-title {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--color-fg);
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 3rem;
    }
}

.hero-subtitle {
    font-size: 1.125rem;
    line-height: 1.6;
    color: var(--color-muted-fg);
    max-width: 700px;
    margin: 0 auto 40px;
}

@media (min-width: 768px) {
    .hero-subtitle {
        font-size: 1.25rem;
    }
}

/* Example Card */
.example-card {
    max-width: 500px;
    margin: 40px auto;
    padding: 24px;
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.example-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
}

.example-row:last-child {
    border-bottom: none;
}

.example-row.highlight {
    background-color: var(--color-muted);
    margin: 0 -24px;
    padding: 16px 24px;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    border-bottom: none;
}

.example-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.example-label {
    flex: 1;
    text-align: left;
    font-weight: 500;
    color: var(--color-fg);
}

.example-value {
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--color-fg);
}

.example-value.negative {
    color: var(--color-muted-fg);
}

.example-value.positive {
    color: var(--color-fg);
    font-size: 1.5rem;
}

.hero-tagline {
    font-size: 1rem;
    color: var(--color-muted-fg);
    margin: 30px 0;
    font-style: italic;
}

/* ==============================
   TYPOGRAPHY
   ============================== */

.section-title {
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 40px;
    color: var(--color-fg);
}

@media (min-width: 768px) {
    .section-title {
        font-size: 2.5rem;
    }
}

.section-conclusion {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 500;
    margin-top: 40px;
    color: var(--color-fg);
}

/* ==============================
   BUTTONS
   ============================== */

.cta-button {
    display: inline-block;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.15s ease;
    cursor: pointer;
    border: none;
}

.cta-primary {
    background-color: var(--color-primary);
    color: var(--color-primary-fg);
}

.cta-primary:hover {
    background-color: #27272A;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12);
}

.section-cta .cta-primary {
    background-color: var(--color-bg);
    color: var(--color-fg);
}

.section-cta .cta-primary:hover {
    background-color: var(--color-muted);
}

/* ==============================
   PROBLEM SECTION
   ============================== */

.problem-list {
    list-style: none;
    max-width: 600px;
    margin: 0 auto 30px;
}

.problem-item {
    font-size: 1.125rem;
    padding: 12px 0;
    color: var(--color-fg);
}

.problem-text {
    text-align: center;
    font-size: 1.125rem;
    max-width: 600px;
    margin: 30px auto;
    color: var(--color-muted-fg);
}

.problem-punch {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 600;
    max-width: 600px;
    margin: 30px auto 0;
    color: var(--color-fg);
}

/* ==============================
   SOLUTION SECTION
   ============================== */

.steps-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 50px;
}

@media (min-width: 768px) {
    .steps-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 32px;
    }
}

.step-card {
    background: var(--color-card);
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    text-align: center;
    transition: all 0.15s ease;
}

.step-card:hover {
    border-color: var(--color-fg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.step-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    color: var(--color-fg);
}

.step-icon svg {
    width: 32px;
    height: 32px;
}

.step-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--color-fg);
}

.step-description {
    color: var(--color-muted-fg);
    font-size: 1rem;
}

.no-list {
    max-width: 600px;
    margin: 50px auto;
    padding: 24px;
    background-color: var(--color-muted);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-fg);
}

.no-list-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-fg);
}

.no-items {
    list-style: none;
}

.no-items li {
    padding: 8px 0;
    color: var(--color-muted-fg);
}

/* ==============================
   AUDIENCE SECTION
   ============================== */

.audience-content {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
}

.audience-intro {
    font-size: 1.125rem;
    margin-bottom: 20px;
    color: var(--color-fg);
}

.audience-list {
    list-style: none;
    font-size: 1.125rem;
    margin-bottom: 30px;
    color: var(--color-fg);
}

.audience-list li {
    padding: 8px 0;
}

.audience-target {
    font-size: 1.125rem;
    color: var(--color-muted-fg);
}

.audience-target strong {
    color: var(--color-fg);
    font-weight: 700;
}

/* ==============================
   TESTIMONIAL
   ============================== */

.testimonial {
    max-width: 700px;
    margin: 0 auto;
    padding: 40px;
    background: var(--color-card);
    border-radius: var(--radius-lg);
    border-left: 3px solid var(--color-fg);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.testimonial-text {
    font-size: 1.25rem;
    font-style: italic;
    margin-bottom: 16px;
    color: var(--color-fg);
    line-height: 1.6;
}

.testimonial-author {
    display: block;
    font-size: 1rem;
    color: var(--color-muted-fg);
    font-style: normal;
}

/* ==============================
   BENEFITS GRID
   ============================== */

.benefits-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    max-width: 600px;
    margin: 40px auto;
}

@media (min-width: 768px) {
    .benefits-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--color-primary-fg);
    font-size: 1rem;
}

.benefit-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.benefit-text {
    font-weight: 400;
}

/* ==============================
   FOOTER
   ============================== */

.footer {
    background-color: var(--color-fg);
    color: var(--color-bg);
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 60px;
    }
}

.footer-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.footer-tagline {
    color: #9CA3AF;
    font-size: 1rem;
}

.footer-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-text,
.footer-contact,
.footer-launch {
    color: #D1D5DB;
    font-size: 0.875rem;
}

.footer-link {
    color: #D1D5DB;
    text-decoration: underline;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: var(--color-bg);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #374151;
    color: #9CA3AF;
    font-size: 0.875rem;
}

/* ==============================
   ACCESSIBILITY
   ============================== */

/* Focus states pour l'accessibilité */
a:focus,
button:focus {
    outline: 2px solid var(--color-fg);
    outline-offset: 2px;
}

/* Reduced motion pour l'accessibilité */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}