/* ==========================================================================
   EuroMail Landing Page
   Aesthetic: Nordic Precision — warm off-white, editorial type, teal accent
   Typography: Albert Sans (display+body) + Instrument Serif (accent)
                + JetBrains Mono (code)
   ========================================================================== */

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

:root {
    --c-bg:          #fafaf8;
    --c-bg-warm:     #f5f4f0;
    --c-surface:     #ffffff;
    --c-border:      #e4e4e0;
    --c-border-h:    #d4d4cf;
    --c-text:        #3f3f3c;
    --c-text-dim:    #6b6b61;
    --c-text-bright: #18181b;
    --c-accent:      #0d9488;
    --c-accent-2:    #14b8a6;
    --c-blue:        #2563eb;
    --c-green:       #047857;
    --c-amber:       #d97706;
    --c-red:         #dc2626;
    --c-accent-hover: #0f766e;

    --font-body:  'Albert Sans', system-ui, -apple-system, sans-serif;
    --font-serif: 'Instrument Serif', Georgia, serif;
    --font-mono:  'JetBrains Mono', 'Fira Code', monospace;

    --space-xs:   0.5rem;
    --space-sm:   0.75rem;
    --space-md:   1rem;
    --space-lg:   1.5rem;
    --space-xl:   2.5rem;
    --space-2xl:  4rem;
    --space-3xl:  6rem;
    --space-4xl:  10rem;

    --radius-sm:  6px;
    --radius-md:  10px;
    --radius-lg:  16px;
    --radius-xl:  24px;

    --max-w:      1200px;
    --nav-h:      64px;
}

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;

}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--c-text);
    background: var(--c-bg);
    overflow-x: hidden;
    position: relative;
}

/* Subtle grain texture */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.3;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; }
ul { list-style: none; }

/* Keyboard focus indicator — visible only for keyboard users */
:focus-visible {
    outline: 2px solid var(--c-accent);
    outline-offset: 2px;
    border-radius: 3px;
}

:focus:not(:focus-visible) {
    outline: none;
}

/* --- Container --- */
.container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    position: relative;
    z-index: 1;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.6rem 1.35rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    white-space: nowrap;
    text-decoration: none;
    letter-spacing: -0.01em;
}

.btn--primary {
    background: var(--c-accent);
    color: #fff;
    border-color: var(--c-accent);
}

.btn--primary:hover {
    background: var(--c-accent-hover);
    border-color: var(--c-accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(13, 148, 136, 0.25);
}

.btn--outline {
    background: transparent;
    color: var(--c-text-bright);
    border-color: var(--c-border-h);
}

.btn--outline:hover {
    border-color: var(--c-text-bright);
    background: var(--c-surface);
}

.btn--ghost {
    background: transparent;
    color: var(--c-text-dim);
    border-color: transparent;
}

.btn--ghost:hover {
    color: var(--c-text-bright);
}

.btn--lg {
    padding: 0.8rem 1.8rem;
    font-size: 0.9375rem;
}

.btn--block {
    width: 100%;
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-h);
    z-index: 100;
    background: rgba(250, 250, 248, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s, background 0.3s;
}

.nav--scrolled {
    border-bottom-color: var(--c-border);
}

.nav__inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xl);
}

.nav__logo-svg {
    height: 26px;
    width: auto;
}

.nav__links {
    display: flex;
    gap: var(--space-xl);
    flex: 1;
    justify-content: center;
}

.nav__link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--c-text-dim);
    transition: color 0.2s;
    position: relative;
    letter-spacing: -0.01em;
    padding: 0.6875rem 0;  /* 11px top+bottom → 44px total height with 22px text */
}

.nav__link:hover {
    color: var(--c-text-bright);
}

.nav__actions {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav__toggle span {
    display: block;
    width: 20px;
    height: 1.5px;
    background: var(--c-text-dim);
    border-radius: 2px;
    transition: all 0.25s;
}

/* --- Hero --- */
.hero {
    padding: calc(var(--nav-h) + var(--space-4xl)) 0 var(--space-3xl);
    text-align: center;
    position: relative;
}

/* Soft radial glow behind hero */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 900px;
    height: 600px;
    background: radial-gradient(ellipse, rgba(13, 148, 136, 0.06) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero > .container {
    position: relative;
    z-index: 1;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.35rem 0.9rem;
    border-radius: 100px;
    border: 1px solid var(--c-border);
    background: var(--c-surface);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--c-text-dim);
    margin-bottom: var(--space-xl);
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.hero__badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--c-accent);
    box-shadow: 0 0 8px rgba(13, 148, 136, 0.4);
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero__title {
    font-size: clamp(2.5rem, 6vw, 4.2rem);
    font-weight: 700;
    line-height: 1.08;
    color: var(--c-text-bright);
    letter-spacing: -0.035em;
    margin-bottom: var(--space-lg);
}

.hero__title-accent {
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 400;
    color: var(--c-accent);
    letter-spacing: -0.02em;
}

.hero__subtitle {
    font-size: 1.1rem;
    color: var(--c-text-dim);
    max-width: 580px;
    margin: 0 auto var(--space-xl);
    line-height: 1.7;
    letter-spacing: -0.01em;
}

.hero__actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    margin-bottom: var(--space-3xl);
    flex-wrap: wrap;
}

.hero__code {
    max-width: 680px;
    margin: 0 auto;
}

/* --- Code Block --- */
.code-block {
    background: var(--c-surface);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-align: left;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 8px 24px rgba(0,0,0,0.06);
}

.code-block__header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-lg);
    border-bottom: 1px solid var(--c-border);
    background: var(--c-bg);
}

.code-block__dots {
    display: flex;
    gap: 6px;
}

.code-block__dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.code-block__dots span:nth-child(1) { background: #fca5a5; }
.code-block__dots span:nth-child(2) { background: #fcd34d; }
.code-block__dots span:nth-child(3) { background: #6ee7b7; }

.code-block__tabs {
    display: flex;
    gap: 2px;
    margin-left: auto;
}

.code-block__tab {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    padding: 0.65rem 0.7rem;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--c-text-dim);
    cursor: pointer;
    transition: background 0.15s, color 0.15s, box-shadow 0.15s;
}

.code-block__tab--active {
    background: var(--c-surface);
    color: var(--c-text-bright);
    box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}

.code-block__tab:hover:not(.code-block__tab--active) {
    color: var(--c-text);
}

.code-block__body {
    padding: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    line-height: 1.75;
    overflow-x: auto;
    color: var(--c-text);
}

.code-block__body code {
    font-family: inherit;
}

/* Syntax tokens — light theme */
.tok-kw   { color: #7c3aed; }
.tok-fn   { color: #0369a1; }
.tok-str  { color: var(--c-green); }
.tok-flag { color: #b45309; }

/* --- Stats --- */
.stats {
    padding: var(--space-2xl) 0;
    border-top: 1px solid var(--c-border);
    border-bottom: 1px solid var(--c-border);
}

.stats__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.stats__item {
    text-align: center;
    padding: var(--space-md);
}

.stats__value {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--c-text-bright);
    letter-spacing: -0.03em;
}

.stats__label {
    font-size: 0.82rem;
    color: var(--c-text-dim);
    margin-top: 0.2rem;
    letter-spacing: -0.01em;
}

/* --- Section Header --- */
.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section-header__title {
    font-size: clamp(1.6rem, 3.2vw, 2.2rem);
    font-weight: 700;
    color: var(--c-text-bright);
    letter-spacing: -0.03em;
    margin-bottom: var(--space-md);
}

.section-header__subtitle {
    font-size: 1.05rem;
    color: var(--c-text-dim);
    max-width: 520px;
    margin: 0 auto;
    letter-spacing: -0.01em;
}

/* --- Scroll offset for anchor navigation --- */
#features,
#api,
#pricing {
    scroll-margin-top: calc(var(--nav-h) + 20px);
}

/* --- Features --- */
.features {
    padding: var(--space-4xl) 0;
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.feature-card {
    display: flex;
    flex-direction: column;
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--c-border);
    background: var(--c-surface);
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
    position: relative;
}

.feature-card:hover {
    border-color: var(--c-border-h);
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.feature-card__icon {
    width: 36px;
    height: 36px;
    margin-bottom: var(--space-lg);
    color: var(--c-accent);
}

.feature-card__icon svg {
    width: 100%;
    height: 100%;
}

.feature-card__title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--c-text-bright);
    margin-bottom: var(--space-xs);
    letter-spacing: -0.02em;
}

.feature-card__text {
    font-size: 0.875rem;
    color: var(--c-text-dim);
    line-height: 1.6;
}

.feature-card__link {
    margin-top: auto;
    padding-top: var(--space-lg);
    padding-bottom: var(--space-xs);
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--c-accent);
    transition: gap 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    min-height: 44px;
}

.feature-card__link:hover {
    gap: 0.5rem;
}

/* --- API Section --- */
.api-section {
    padding: var(--space-4xl) 0;
    background: var(--c-bg-warm);
    border-top: 1px solid var(--c-border);
    border-bottom: 1px solid var(--c-border);
}

.api-section__grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: var(--space-2xl);
    align-items: start;
}

.endpoint-group {
    margin-bottom: var(--space-xl);
}

.endpoint-group:last-child {
    margin-bottom: 0;
}

.endpoint-group__title {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--c-text-dim);
    margin-bottom: var(--space-sm);
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid var(--c-border);
}

.endpoint {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.4rem 0;
    font-size: 0.85rem;
}

.endpoint__method {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    min-width: 44px;
    text-align: center;
    letter-spacing: 0.02em;
}

.endpoint__method--get    { background: rgba(5, 150, 105, 0.08); color: var(--c-green); }
.endpoint__method--post   { background: rgba(37, 99, 235, 0.08); color: var(--c-blue); }
.endpoint__method--put    { background: rgba(217, 119, 6, 0.08); color: var(--c-amber); }
.endpoint__method--delete { background: rgba(220, 38, 38, 0.08); color: var(--c-red); }

.endpoint__path {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--c-text-bright);
}

.endpoint__desc {
    margin-left: auto;
    color: var(--c-text-dim);
    font-size: 0.8rem;
}

.api-section__sdks-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--c-text-bright);
    margin-bottom: var(--space-lg);
    letter-spacing: -0.02em;
}

.sdk-card {
    border: 1px solid var(--c-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--space-md);
    background: var(--c-surface);
}

.sdk-card__header {
    padding: var(--space-sm) var(--space-md);
    border-bottom: 1px solid var(--c-border);
    background: var(--c-bg);
}

.sdk-card__lang {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--c-text);
}

.sdk-card__code {
    padding: var(--space-md);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--c-accent);
    overflow-x: auto;
}

.api-section__docs-link {
    margin-top: var(--space-xl);
}

.api-section__docs-link .btn {
    width: 100%;
}

/* --- Pricing --- */
.pricing {
    padding: var(--space-4xl) 0;
}

.pricing__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    align-items: start;
}

.pricing-card {
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--c-border);
    background: var(--c-surface);
    position: relative;
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.pricing-card:hover {
    border-color: var(--c-border-h);
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.pricing-card--featured {
    border-color: var(--c-accent);
    box-shadow: 0 0 0 1px var(--c-accent);
}

.pricing-card--featured:hover {
    box-shadow: 0 0 0 1px var(--c-accent), 0 4px 16px rgba(13, 148, 136, 0.12);
}

.pricing-card__badge {
    position: absolute;
    top: -11px;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.2rem 0.85rem;
    border-radius: 100px;
    background: var(--c-accent);
    font-size: 0.72rem;
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
    letter-spacing: -0.01em;
}

.pricing-card__header {
    margin-bottom: var(--space-xl);
}

.pricing-card__name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--c-text);
    margin-bottom: var(--space-xs);
    letter-spacing: -0.01em;
}

.pricing-card__price {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--c-text-bright);
    letter-spacing: -0.04em;
    line-height: 1;
}

.pricing-card__price span {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--c-text-dim);
}

.pricing__toggle-label {
    font-size: 0.875rem;
    color: var(--c-text-dim);
    transition: color 0.2s;
}

.pricing__toggle-label--active {
    color: var(--c-text-bright);
    font-weight: 500;
}

.pricing-card__features {
    margin-bottom: var(--space-xl);
}

.pricing-card__features li {
    padding: 0.4rem 0;
    font-size: 0.875rem;
    color: var(--c-text);
    border-bottom: 1px solid var(--c-border);
}

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

/* --- CTA --- */
.cta {
    padding: var(--space-4xl) 0;
}

.cta__inner {
    text-align: center;
    padding: var(--space-3xl) var(--space-xl);
    border-radius: var(--radius-xl);
    border: 1px solid var(--c-border);
    background: var(--c-surface);
    position: relative;
    overflow: hidden;
}

.cta__inner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 10%, var(--c-accent) 50%, transparent 90%);
}

.cta__title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    color: var(--c-text-bright);
    margin-bottom: var(--space-md);
    letter-spacing: -0.03em;
}

.cta__text {
    font-size: 1rem;
    color: var(--c-text);
    margin-bottom: var(--space-xl);
    max-width: 440px;
    margin-left: auto;
    margin-right: auto;
}

.cta__actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* --- Footer --- */
.footer {
    padding: var(--space-3xl) 0 var(--space-xl);
    border-top: 1px solid var(--c-border);
}

.footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-2xl);
}

.footer__logo {
    height: 24px;
    width: auto;
    margin-bottom: var(--space-md);
}

.footer__tagline {
    font-size: 0.85rem;
    color: var(--c-text-dim);
    max-width: 260px;
}

.footer__col {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer__col-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--c-text-bright);
    margin-bottom: var(--space-xs);
}

.footer__col a {
    font-size: 0.85rem;
    color: var(--c-text-dim);
    transition: color 0.2s;
}

.footer__col a:hover {
    color: var(--c-text-bright);
}

.footer__bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--c-border);
}

.footer__bottom p {
    font-size: 0.78rem;
    color: var(--c-text-dim);
}

/* --- Animations --- */
[data-animate] {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

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

[data-delay="1"] { transition-delay: 0.08s; }
[data-delay="2"] { transition-delay: 0.16s; }
[data-delay="3"] { transition-delay: 0.24s; }
[data-delay="4"] { transition-delay: 0.32s; }
[data-delay="5"] { transition-delay: 0.40s; }
[data-delay="6"] { transition-delay: 0.48s; }
[data-delay="7"] { transition-delay: 0.56s; }
[data-delay="8"] { transition-delay: 0.64s; }

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

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

    .api-section__grid {
        grid-template-columns: 1fr;
    }

    .footer__grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-xl);
    }
}

@media (max-width: 768px) {
    .nav__links,
    .nav__actions {
        display: none;
    }

    .nav__toggle {
        display: flex;
    }

    .nav--open .nav__links,
    .nav--open .nav__actions {
        display: flex;
    }

    .nav--open .nav__inner {
        flex-wrap: wrap;
        padding-bottom: var(--space-md);
    }

    .nav--open .nav__links {
        order: 3;
        width: 100%;
        flex-direction: column;
        gap: var(--space-xs);
        padding-top: var(--space-sm);
        border-top: 1px solid var(--c-border);
    }

    .nav--open .nav__actions {
        order: 4;
        width: 100%;
        padding-top: var(--space-sm);
    }

    .nav--open {
        height: auto;
        background: rgba(250, 250, 248, 0.98);
    }

    .hero {
        padding-top: calc(var(--nav-h) + var(--space-2xl));
    }

    .hero__title {
        font-size: 2.2rem;
    }

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

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

    .pricing__grid {
        grid-template-columns: 1fr;
        max-width: 380px;
        margin: 0 auto;
    }

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

    .endpoint__desc {
        display: none;
    }
}