/* =====================================================
   DELTA Admin Finance — Styles
   ===================================================== */

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

:root {
    --navy: #1B2A4A;
    --navy-light: #2C3E6B;
    --navy-dark: #0F1A2E;
    --blue: #3B7DDD;
    --blue-light: #5B9AEF;
    --blue-pale: #EBF2FF;
    --accent: #F0A500;
    --white: #FFFFFF;
    --gray-50: #F8FAFC;
    --gray-100: #F1F5F9;
    --gray-200: #E2E8F0;
    --gray-300: #CBD5E1;
    --gray-400: #94A3B8;
    --gray-500: #64748B;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1E293B;
    --gray-900: #0F172A;
    --radius: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 20px 40px -12px rgba(27,42,74,0.15);
    --shadow-xl: 0 25px 50px -12px rgba(27,42,74,0.2);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--gray-700);
    line-height: 1.6;
    background: var(--white);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

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

img {
    max-width: 100%;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    gap: 8px;
    white-space: nowrap;
}

.btn-primary {
    background: var(--blue);
    color: var(--white);
    border-color: var(--blue);
}

.btn-primary:hover {
    background: var(--navy);
    border-color: var(--navy);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background: transparent;
    color: var(--navy);
    border-color: var(--gray-300);
}

.btn-outline:hover {
    border-color: var(--navy);
    background: var(--navy);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.05rem;
    border-radius: 12px;
}

.btn-block {
    width: 100%;
}

.btn-nav {
    padding: 10px 24px;
    font-size: 0.9rem;
    background: var(--blue);
    color: var(--white);
    border-color: var(--blue);
    border-radius: 8px;
}

.btn-nav:hover {
    background: var(--navy);
    border-color: var(--navy);
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.06);
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow);
}

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

.logo {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-delta {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--navy);
    letter-spacing: -0.5px;
}

.logo-sub {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--blue);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 8px;
}

.nav-links li a {
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--gray-600);
    border-radius: 8px;
    transition: var(--transition);
}

.nav-links li a:hover {
    color: var(--navy);
    background: var(--gray-100);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--navy);
    transition: var(--transition);
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--blue-pale) 50%, var(--gray-50) 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(59, 125, 221, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(27, 42, 74, 0.06) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    text-align: center;
    max-width: 820px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--gray-600);
    margin-bottom: 32px;
    box-shadow: var(--shadow-sm);
}

.hero h1 {
    font-size: clamp(2.5rem, 5.5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    color: var(--navy);
    margin-bottom: 24px;
    letter-spacing: -1.5px;
}

.text-gradient {
    background: linear-gradient(135deg, var(--blue) 0%, var(--navy-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 64px;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    padding: 32px 48px;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-100);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-number {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--navy);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--gray-500);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--gray-200);
}

/* --- Section Headers --- */
.section-header {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: var(--blue-pale);
    color: var(--blue);
    border-radius: 50px;
    font-size: 0.82rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.section-header h2 {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 800;
    color: var(--navy);
    line-height: 1.15;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
}

.section-header p {
    font-size: 1.05rem;
    color: var(--gray-500);
    line-height: 1.7;
}

/* --- Services --- */
.services {
    padding: 120px 0;
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    padding: 36px 28px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--blue), var(--navy-light));
    opacity: 0;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.service-card:hover::before {
    opacity: 1;
}

.service-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--blue-pale);
    border-radius: 12px;
    margin-bottom: 20px;
    color: var(--blue);
}

.service-icon svg {
    width: 24px;
    height: 24px;
}

.service-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 10px;
}

.service-card p {
    font-size: 0.9rem;
    color: var(--gray-500);
    line-height: 1.6;
}

/* --- Pourquoi nous --- */
.pourquoi {
    padding: 120px 0;
    background: var(--gray-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.feature {
    padding: 40px 32px;
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-100);
    transition: var(--transition);
}

.feature:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.feature-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--blue-pale);
    line-height: 1;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--blue), rgba(59,125,221,0.2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.feature h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 12px;
}

.feature p {
    font-size: 0.95rem;
    color: var(--gray-500);
    line-height: 1.7;
}

/* --- Processus --- */
.processus {
    padding: 120px 0;
    background: var(--white);
}

.steps {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: 28px;
    width: 100%;
}

.step-circle {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--navy);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 800;
}

.step-content h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--navy);
    margin-bottom: 8px;
    padding-top: 4px;
}

.step-content p {
    font-size: 0.95rem;
    color: var(--gray-500);
    line-height: 1.7;
}

.step-line {
    width: 2px;
    height: 40px;
    background: var(--gray-200);
    margin-left: 27px;
}

/* --- Tarifs --- */
.tarifs {
    padding: 120px 0;
    background: var(--gray-50);
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    align-items: start;
}

.pricing-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    position: relative;
}

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

.pricing-featured {
    border: 2px solid var(--blue);
    box-shadow: var(--shadow-lg);
    transform: scale(1.03);
}

.pricing-featured:hover {
    transform: scale(1.03) translateY(-4px);
}

.pricing-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--blue);
    color: var(--white);
    padding: 4px 14px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}

.pricing-header {
    padding: 36px 32px 0;
}

.pricing-header h3 {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--navy);
    margin-bottom: 6px;
}

.pricing-desc {
    font-size: 0.9rem;
    color: var(--gray-500);
}

.pricing-body {
    padding: 24px 32px 36px;
}

.price {
    display: flex;
    align-items: baseline;
    gap: 4px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}

.price-currency {
    font-size: 0.9rem;
    color: var(--gray-500);
    font-weight: 500;
}

.price-amount {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--navy);
    letter-spacing: -1px;
    line-height: 1;
}

.price-period {
    font-size: 0.9rem;
    color: var(--gray-500);
    font-weight: 500;
}

.pricing-features {
    list-style: none;
    margin-bottom: 28px;
}

.pricing-features li {
    padding: 10px 0;
    font-size: 0.9rem;
    color: var(--gray-600);
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    align-items: center;
    gap: 10px;
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li::before {
    content: '';
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    background: var(--blue-pale);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%233B7DDD' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
}

/* --- Contact --- */
.contact {
    padding: 120px 0;
    background: var(--white);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 64px;
    align-items: start;
}

.contact-info h2 {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--navy);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.contact-info > p {
    font-size: 1rem;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 36px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 0.95rem;
    color: var(--gray-600);
}

.contact-item svg {
    width: 20px;
    height: 20px;
    color: var(--blue);
    flex-shrink: 0;
}

.contact-form {
    background: var(--gray-50);
    padding: 40px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-100);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--gray-700);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-200);
    border-radius: 10px;
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--gray-700);
    background: var(--white);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(59, 125, 221, 0.1);
}

.form-group textarea {
    resize: vertical;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

/* --- Footer --- */
.footer {
    background: var(--navy-dark);
    padding: 64px 0 0;
    color: var(--gray-400);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand .logo-delta {
    color: var(--white);
}

.footer-brand .logo-sub {
    color: var(--blue-light);
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.7;
    max-width: 300px;
}

.footer-links h4 {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--white);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.footer-links ul {
    list-style: none;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    font-size: 0.9rem;
    color: var(--gray-400);
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: var(--white);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    font-size: 0.82rem;
}

.footer-legal {
    display: flex;
    gap: 24px;
}

.footer-legal a {
    color: var(--gray-400);
    transition: var(--transition);
}

.footer-legal a:hover {
    color: var(--white);
}

/* --- Animations --- */
[data-aos] {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .pricing-featured {
        transform: none;
    }

    .pricing-featured:hover {
        transform: translateY(-4px);
    }

    .pricing-cards > :last-child {
        grid-column: span 2;
        max-width: 400px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 24px;
        gap: 8px;
        border-bottom: 1px solid var(--gray-200);
        box-shadow: var(--shadow-lg);
        transform: translateY(-120%);
        transition: var(--transition);
        opacity: 0;
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
    }

    .nav-links li a {
        display: block;
        padding: 12px 16px;
        font-size: 1rem;
    }

    .btn-nav {
        text-align: center;
        margin-top: 8px;
    }

    .hero {
        padding: 100px 0 60px;
        min-height: auto;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: 20px;
        padding: 28px 32px;
    }

    .stat-divider {
        width: 40px;
        height: 1px;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .pricing-cards {
        grid-template-columns: 1fr;
    }

    .pricing-cards > :last-child {
        grid-column: auto;
        max-width: none;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-form {
        padding: 28px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .section-header {
        margin-bottom: 48px;
    }

    .services,
    .pourquoi,
    .processus,
    .tarifs,
    .contact {
        padding: 80px 0;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }

    .btn-lg {
        padding: 14px 28px;
        font-size: 0.95rem;
    }

    .pricing-body {
        padding: 20px 24px 32px;
    }

    .pricing-header {
        padding: 28px 24px 0;
    }
}