/* ==========================================================================
   Fermat Apps — Premium light theme
   European · privacy-first · calm · trustworthy
   Deep teal primary + warm copper accent on a warm near-white ground.
   ========================================================================== */

:root {
    /* Surfaces */
    --bg:            #FAF8F4;  /* warm near-white ground */
    --bg-tint:       #F1ECE3;  /* faint tint for alternating sections */
    --surface:       #FFFFFF;  /* cards */
    --surface-2:     #FBF9F5;

    /* Brand */
    --primary:       #0F3D3E;  /* deep teal-green */
    --primary-600:   #12494A;
    --primary-700:   #0B2E2F;
    --accent:        #C67F3C;  /* warm copper/amber */
    --accent-600:    #B06E2F;
    --accent-tint:   rgba(198, 127, 60, 0.12);
    --primary-tint:  rgba(15, 61, 62, 0.08);

    /* Ink */
    --ink:           #1E2A2E;  /* charcoal — never pure black */
    --ink-soft:      #4F5E63;
    --ink-muted:     #86929A;
    --on-dark:       #F4F1EA;
    --on-dark-soft:  rgba(244, 241, 234, 0.72);

    /* Lines & shadows (soft, premium) */
    --border:        #E7E0D4;
    --border-strong: #D8CFBE;
    --shadow-sm:     0 1px 2px rgba(16, 40, 40, 0.04), 0 2px 8px rgba(16, 40, 40, 0.05);
    --shadow-md:     0 4px 14px rgba(16, 40, 40, 0.07), 0 12px 32px rgba(16, 40, 40, 0.07);
    --shadow-lg:     0 20px 50px rgba(16, 40, 40, 0.12);

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

    /* Spacing */
    --sp-xs: 0.25rem;  --sp-sm: 0.5rem;  --sp-md: 1rem;   --sp-lg: 1.5rem;
    --sp-xl: 2rem;     --sp-2xl: 3rem;   --sp-3xl: 4.5rem; --sp-4xl: 7rem;

    /* Radii */
    --r-sm: 6px; --r-md: 10px; --r-lg: 16px; --r-xl: 22px; --r-full: 999px;

    /* Motion */
    --t-fast: 140ms ease;
    --t: 240ms cubic-bezier(0.22, 0.61, 0.36, 1);

    /* Layout */
    --max: 1120px;
    --pad: 1.5rem;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: var(--font);
    font-size: 1.0625rem;          /* ~17px comfortable body */
    line-height: 1.7;
    color: var(--ink);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; display: block; }
ul { list-style: none; }
a { color: var(--primary); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--accent-600); }

h1, h2, h3, h4 { color: var(--ink); line-height: 1.12; letter-spacing: -0.02em; font-weight: 700; }

::selection { background: var(--accent-tint); color: var(--primary-700); }

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

/* ------------------------------------------------------------------ Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    padding: 0.9rem 1.4rem;
    font-family: var(--font); font-size: 0.98rem; font-weight: 600; letter-spacing: -0.01em;
    border-radius: var(--r-full); border: 1.5px solid transparent; cursor: pointer;
    transition: transform var(--t-fast), box-shadow var(--t), background var(--t), color var(--t), border-color var(--t);
    white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }

.btn-primary { background: var(--primary); color: var(--on-dark); box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--primary-600); color: var(--on-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }

.btn-secondary { background: transparent; color: var(--primary); border-color: var(--border-strong); }
.btn-secondary:hover { background: var(--surface); border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }

.btn-lg { padding: 1.05rem 1.9rem; font-size: 1.05rem; }
.btn-full { width: 100%; }

/* ------------------------------------------------------------------ Header */
.navbar {
    position: fixed; inset: 0 0 auto 0; z-index: 1000;
    background: rgba(250, 248, 244, 0.82);
    backdrop-filter: saturate(1.4) blur(14px);
    -webkit-backdrop-filter: saturate(1.4) blur(14px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--t), box-shadow var(--t), background var(--t);
}
.navbar.scrolled { border-bottom-color: var(--border); box-shadow: 0 1px 0 rgba(16,40,40,0.03), var(--shadow-sm); }

.nav-container { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { display: flex; align-items: center; }
.logo-img { height: 30px; width: auto; }

.nav-links { display: flex; align-items: center; gap: 2rem; }
.nav-links a { color: var(--ink-soft); font-weight: 500; font-size: 0.95rem; }
.nav-links a:hover { color: var(--ink); }
.nav-links a.btn { color: var(--on-dark); }
.nav-links a.btn:hover { color: var(--on-dark); }
.nav-links a.btn.btn-primary { padding: 0.6rem 1.15rem; font-size: 0.92rem; }

.lang-toggle {
    background: transparent; border: 1.5px solid var(--border-strong); color: var(--ink-soft);
    padding: 0.4rem 0.7rem; border-radius: var(--r-full); font-size: 0.85rem; font-weight: 600;
    cursor: pointer; transition: all var(--t-fast);
}
.lang-toggle:hover { border-color: var(--primary); color: var(--primary); }

.mobile-menu-btn { display: none; flex-direction: column; gap: 5px; padding: 8px; background: none; border: none; cursor: pointer; }
.mobile-menu-btn span { display: block; width: 24px; height: 2px; background: var(--ink); border-radius: 2px; transition: transform var(--t-fast), opacity var(--t-fast); }
.mobile-menu-btn.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ------------------------------------------------------------------ Sections */
.section { padding: var(--sp-4xl) 0; position: relative; }
.section > .container { max-width: var(--max); }

/* Alternating tints so sections breathe */
.how-it-works, .why-europe, .team { background: var(--bg-tint); }
.problem, .pricing, .work, .contact { background: var(--bg); }

.section-header { text-align: center; max-width: 720px; margin: 0 auto var(--sp-3xl); }
.section-badge {
    display: inline-block; margin-bottom: var(--sp-md);
    font-size: 0.78rem; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase;
    color: var(--accent-600);
}
.section-title { font-size: clamp(1.9rem, 3.6vw, 2.85rem); font-weight: 800; margin-bottom: var(--sp-md); }
.section-subtitle { font-size: 1.15rem; line-height: 1.65; color: var(--ink-soft); max-width: 62ch; margin: 0 auto; }

/* ------------------------------------------------------------------ Hero */
.hero {
    position: relative; min-height: 100svh; display: flex; align-items: center;
    padding: calc(64px + var(--sp-3xl)) 0 var(--sp-3xl); overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0; pointer-events: none;
    background:
        radial-gradient(60% 50% at 82% 18%, var(--accent-tint), transparent 70%),
        radial-gradient(55% 45% at 8% 90%, var(--primary-tint), transparent 70%);
}
.hero .container { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: var(--sp-3xl); align-items: center; }
.hero-content { position: relative; z-index: 1; }
.hero-title {
    font-size: clamp(2.6rem, 5.4vw, 4.4rem); font-weight: 800; line-height: 1.05;
    letter-spacing: -0.03em; margin-bottom: var(--sp-lg);
}
.gradient-text { color: var(--accent); }
.hero-subtitle { font-size: 1.2rem; line-height: 1.65; color: var(--ink-soft); margin-bottom: var(--sp-xl); max-width: 30rem; }
.hero-cta { display: flex; flex-wrap: wrap; gap: var(--sp-md); margin-bottom: var(--sp-2xl); }
.hero-stats { display: flex; gap: var(--sp-2xl); }
.stat { text-align: left; }
.stat-number { display: block; font-size: 2.2rem; font-weight: 800; color: var(--primary); letter-spacing: -0.02em; }
.stat-label { font-size: 0.9rem; color: var(--ink-muted); }

.hero-visual { position: relative; }
.workflow-preview {
    position: relative; background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--r-xl); padding: var(--sp-xl); box-shadow: var(--shadow-lg);
}
.workflow-img { width: 100%; height: auto; }

/* ------------------------------------------------------------------ How it works */
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-lg); }
.step-card {
    position: relative; background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--r-lg); padding: var(--sp-xl); box-shadow: var(--shadow-sm);
    transition: transform var(--t), box-shadow var(--t), border-color var(--t);
}
.step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--border-strong); }
/* Connecting arrows between cards (desktop) */
.process-steps .step-card:not(:last-child)::after {
    content: ""; position: absolute; top: 50%; right: calc(var(--sp-lg) * -1);
    width: var(--sp-lg); height: 2px; background: var(--border-strong);
    transform: translateY(-50%); z-index: 1;
}
.process-steps .step-card:not(:last-child)::before {
    content: ""; position: absolute; top: 50%; right: calc(var(--sp-lg) * -1 + 1px);
    width: 8px; height: 8px; border-top: 2px solid var(--border-strong); border-right: 2px solid var(--border-strong);
    transform: translateY(-50%) rotate(45deg); z-index: 2;
}
.step-number {
    position: absolute; top: var(--sp-lg); right: var(--sp-lg);
    font-size: 0.8rem; font-weight: 700; color: var(--accent); letter-spacing: 0.02em;
}
.step-icon {
    width: 52px; height: 52px; margin-bottom: var(--sp-lg); border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    background: var(--primary-tint); color: var(--primary);
}
.step-icon svg { width: 26px; height: 26px; }
.step-icon img { width: 26px; height: 26px; }
.step-card h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: var(--sp-sm); }
.step-card p { font-size: 0.98rem; color: var(--ink-soft); }

/* ------------------------------------------------------------------ Pricing */
.pricing-tiers { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-lg); align-items: stretch; }
.tier-card {
    position: relative; display: flex; flex-direction: column;
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
    padding: var(--sp-xl); box-shadow: var(--shadow-sm);
    transition: transform var(--t), box-shadow var(--t), border-color var(--t);
}
.tier-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.tier-card.featured {
    border: 2px solid var(--accent); box-shadow: var(--shadow-lg);
    transform: scale(1.035); z-index: 2;
}
.tier-card.featured:hover { transform: scale(1.035) translateY(-4px); }
.tier-badge {
    position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
    font-size: 0.72rem; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase;
    color: var(--on-dark); background: var(--accent); padding: 0.35rem 0.9rem; border-radius: var(--r-full);
    box-shadow: var(--shadow-sm);
}
.tier-name { font-size: 1.4rem; font-weight: 800; margin-bottom: var(--sp-lg); color: var(--primary); }
.tier-row { display: flex; flex-direction: column; gap: 2px; padding: var(--sp-sm) 0; border-top: 1px solid var(--border); font-size: 0.95rem; }
.tier-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-muted); font-weight: 600; }
.tier-value { color: var(--ink-soft); }
.tier-prices { display: flex; gap: var(--sp-xl); margin: var(--sp-lg) 0; padding-top: var(--sp-lg); border-top: 1px solid var(--border); }
.tier-price { display: flex; flex-direction: column; gap: 2px; }
.tier-price-value { font-size: 1.1rem; font-weight: 700; color: var(--ink); }
.tier-card .btn { margin-top: auto; }

/* ------------------------------------------------------------------ Why European (trust) */
.europe-badges { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-lg); max-width: 880px; margin: var(--sp-2xl) auto 0; }
.europe-badge {
    display: flex; align-items: center; gap: var(--sp-md);
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
    padding: var(--sp-lg) var(--sp-xl); font-weight: 600; color: var(--ink); box-shadow: var(--shadow-sm);
}
.europe-badge svg { width: 26px; height: 26px; flex-shrink: 0; color: var(--primary); }
.europe-badge .flag { font-size: 1.5rem; line-height: 1; }

/* ------------------------------------------------------------------ Track record: stat band + case studies */
.trust-band {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-lg);
    max-width: 880px; margin: 0 auto var(--sp-3xl);
    background: var(--primary); border-radius: var(--r-lg); padding: var(--sp-xl) var(--sp-lg);
    box-shadow: var(--shadow-md);
}
.trust-band .tb-item { text-align: center; color: var(--on-dark); padding: var(--sp-sm) var(--sp-md); }
.trust-band .tb-item + .tb-item { border-left: 1px solid rgba(244, 241, 234, 0.16); }
.trust-band .tb-number { display: block; font-size: 1.9rem; font-weight: 800; color: #fff; letter-spacing: -0.02em; }
.trust-band .tb-label { font-size: 0.9rem; color: var(--on-dark-soft); }

.case-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--sp-lg); }
.case-card {
    display: flex; flex-direction: column; background: var(--surface);
    border: 1px solid var(--border); border-radius: var(--r-lg); padding: var(--sp-xl);
    box-shadow: var(--shadow-sm); transition: transform var(--t), box-shadow var(--t);
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.case-type {
    align-self: flex-start; font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em;
    color: var(--accent-600); background: var(--accent-tint); padding: 0.3rem 0.7rem; border-radius: var(--r-full);
    margin-bottom: var(--sp-md);
}
.case-name { font-size: 1.5rem; font-weight: 800; margin-bottom: var(--sp-sm); }
.case-desc { font-size: 0.98rem; color: var(--ink-soft); line-height: 1.6; margin-bottom: var(--sp-md); }
.case-link { margin-top: auto; font-weight: 600; color: var(--accent-600); }
.case-note { text-align: center; font-size: 0.95rem; color: var(--ink-muted); margin-top: var(--sp-xl); }

/* ------------------------------------------------------------------ About */
.team-grid.team-single { display: flex; justify-content: center; }
.team-card {
    display: grid; grid-template-columns: 260px 1fr; gap: var(--sp-2xl); align-items: center;
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-xl);
    padding: var(--sp-2xl); box-shadow: var(--shadow-md); max-width: 900px;
}
.team-photo { border-radius: var(--r-lg); overflow: hidden; aspect-ratio: 1; background: var(--bg-tint); }
.team-photo img { width: 100%; height: 100%; object-fit: cover; }
.team-info h3 { font-size: 1.6rem; font-weight: 800; }
.team-role { display: inline-block; font-weight: 600; color: var(--accent-600); margin-bottom: var(--sp-md); }
.team-info p { color: var(--ink-soft); margin-bottom: var(--sp-lg); }
.team-contact { display: flex; flex-wrap: wrap; gap: var(--sp-lg); }
.team-link { display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 600; color: var(--primary); }
.team-link svg { width: 16px; height: 16px; }
.team-link:hover { color: var(--accent-600); }

/* ------------------------------------------------------------------ Contact */
.contact-wrapper { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-3xl); align-items: start; }
.contact-info .section-badge { text-align: left; }
.contact-info .section-title { font-size: clamp(1.8rem, 3vw, 2.4rem); font-weight: 800; margin-bottom: var(--sp-md); }
.contact-info > p { color: var(--ink-soft); font-size: 1.1rem; margin-bottom: var(--sp-xl); }
.contact-details { display: flex; flex-direction: column; gap: var(--sp-md); }
.contact-item { display: flex; align-items: center; gap: var(--sp-md); color: var(--ink-soft); }
.contact-item svg { width: 20px; height: 20px; color: var(--primary); }
.contact-item a { color: var(--ink); font-weight: 600; }
.contact-item a:hover { color: var(--accent-600); }

.contact-form {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
    padding: var(--sp-xl); box-shadow: var(--shadow-md); display: flex; flex-direction: column; gap: var(--sp-md);
}
.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label { font-size: 0.85rem; font-weight: 600; color: var(--ink-soft); }
.form-group input, .form-group textarea {
    font-family: var(--font); font-size: 1rem; color: var(--ink);
    background: var(--surface-2); border: 1.5px solid var(--border); border-radius: var(--r-md);
    padding: 0.8rem 1rem; transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--ink-muted); }
.form-group input:focus, .form-group textarea:focus {
    outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-tint);
}
.contact-form .btn { margin-top: var(--sp-sm); }

/* ------------------------------------------------------------------ Footer */
.footer { background: var(--primary-700); color: var(--on-dark-soft); padding: var(--sp-3xl) 0 var(--sp-xl); }
.footer-content { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: var(--sp-2xl); padding-bottom: var(--sp-2xl); }
.footer-logo { height: 28px; width: auto; margin-bottom: var(--sp-md); filter: brightness(0) invert(1) opacity(0.92); }
.footer-brand p { color: var(--on-dark-soft); max-width: 28ch; }
.footer-column h4 { color: var(--on-dark); font-size: 0.95rem; margin-bottom: var(--sp-md); letter-spacing: 0.02em; }
.footer-column ul li { margin-bottom: 0.6rem; }
.footer-column a { color: var(--on-dark-soft); font-size: 0.95rem; }
.footer-column a:hover { color: #fff; }
.footer-bottom {
    border-top: 1px solid rgba(244, 241, 234, 0.14); padding-top: var(--sp-lg);
    display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--sp-sm);
    font-size: 0.85rem; color: var(--on-dark-soft);
}
.footer-bottom a { color: var(--on-dark-soft); }

/* ------------------------------------------------------------------ Notifications (JS) */
.notification {
    position: fixed; bottom: 24px; right: 24px; z-index: 2000;
    background: var(--surface); color: var(--ink); border: 1px solid var(--border);
    border-left: 4px solid var(--primary); border-radius: var(--r-md);
    padding: 0.9rem 1.2rem; box-shadow: var(--shadow-lg); font-weight: 500;
    transform: translateY(20px); opacity: 0; transition: opacity var(--t), transform var(--t);
}
.notification.show { transform: translateY(0); opacity: 1; }
.notification.success { border-left-color: #2E7D5B; }
.notification.error { border-left-color: #C0492F; }

/* ------------------------------------------------------------------ Scroll-in animation */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
.animate-fade-in-up { animation: fadeInUp 0.7s cubic-bezier(0.22, 0.61, 0.36, 1) forwards; }
.tier-card.featured.animate-fade-in-up { animation-name: fadeInUp; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .animate-fade-in-up { animation: none !important; opacity: 1 !important; }
    [data-reveal] { opacity: 1 !important; }
}

/* ==========================================================================
   Responsive (mobile-first adjustments)
   ========================================================================== */
@media (max-width: 960px) {
    .hero .container { grid-template-columns: 1fr; gap: var(--sp-2xl); }
    .hero-visual { order: -1; max-width: 460px; margin: 0 auto; }
    .process-steps { grid-template-columns: repeat(2, 1fr); }
    .process-steps .step-card:not(:last-child)::after,
    .process-steps .step-card:not(:last-child)::before { display: none; }
    .pricing-tiers { grid-template-columns: 1fr; max-width: 440px; margin: 0 auto; }
    .tier-card.featured { transform: none; order: -1; }
    .tier-card.featured:hover { transform: translateY(-4px); }
    .europe-badges { grid-template-columns: 1fr; max-width: 460px; }
    .trust-band { grid-template-columns: 1fr; gap: 0; }
    .trust-band .tb-item + .tb-item { border-left: none; border-top: 1px solid rgba(244,241,234,0.16); }
    .contact-wrapper { grid-template-columns: 1fr; gap: var(--sp-2xl); }
    .team-card { grid-template-columns: 1fr; text-align: center; padding: var(--sp-xl); }
    .team-photo { max-width: 220px; margin: 0 auto; }
    .team-contact { justify-content: center; }
    .footer-content { grid-template-columns: 1fr 1fr; gap: var(--sp-xl); }
}

@media (max-width: 720px) {
    :root { --sp-4xl: 4.5rem; --sp-3xl: 3rem; }
    .nav-links {
        position: fixed; top: 64px; left: 0; right: 0;
        flex-direction: column; align-items: stretch; gap: var(--sp-sm);
        background: var(--bg); border-bottom: 1px solid var(--border);
        padding: var(--sp-lg) var(--pad); box-shadow: var(--shadow-md);
        transform: translateY(-8px); opacity: 0; pointer-events: none;
        transition: opacity var(--t), transform var(--t);
    }
    .nav-links.active { transform: translateY(0); opacity: 1; pointer-events: auto; }
    .nav-links a { padding: 0.5rem 0; }
    .nav-links li:last-child { order: -1; align-self: flex-end; }
    .mobile-menu-btn { display: flex; }
    .process-steps { grid-template-columns: 1fr; max-width: 380px; margin: 0 auto; }
    .case-grid { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr; }
    .hero-stats { gap: var(--sp-xl); }
}