/*
======================================================================
  Sylis Studio — Single page layout
  Technologies: HTML5, CSS3, vanilla JS
  Design principles: dark, calm, premium, lots of whitespace
======================================================================
*/

/* ===================== CSS RESET & BASE ===================== */

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: 'Quicksand', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI',
        sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

img {
    max-width: 100%;
    display: block;
}

button,
input,
textarea {
    font-family: inherit;
}

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

:focus-visible {
    outline: 2px solid var(--accent-soft);
    outline-offset: 3px;
}

/* ===================== DESIGN TOKENS ===================== */

:root {
    /* Brand palette */
    --bg-main: #0b1020;
    --bg-secondary: #111827;
    --text-primary: #ffffff;
    --text-secondary: #cbd5e1;
    --accent-main: #4f46e5;
    --accent-soft: #818cf8;

    /* Layout */
    --content-width: 1120px;
    --gutter: 1.75rem;

    /* Typography */
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Radii */
    --radius-lg: 18px;
    --radius-md: 12px;
    --radius-pill: 999px;

    /* Shadows */
    --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.6);
    --shadow-subtle: 0 10px 30px rgba(15, 23, 42, 0.45);

    /* Animation */
    --ease-standard: cubic-bezier(0.21, 0.64, 0.29, 0.99);
    --transition-fast: 160ms var(--ease-standard);
    --transition-med: 220ms var(--ease-standard);
}

/* ===================== LAYOUT HELPERS ===================== */

.container {
    width: 100%;
    max-width: calc(var(--content-width) + var(--gutter) * 2);
    margin: 0 auto;
    padding-inline: var(--gutter);
}

.section {
    position: relative;
    padding: 5rem 0 5.5rem;
}

@media (min-height: 800px) {
    .section {
        padding-block: 6rem;
    }
}

.section-inner {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.section-header {
    max-width: 640px;
}

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

.eyebrow {
    letter-spacing: 0.16em;
    text-transform: uppercase;
    font-size: 0.75rem;
    color: var(--accent-soft);
    margin-bottom: 0.9rem;
}

.section-header h2 {
    font-size: clamp(1.85rem, 2.2vw + 1.3rem, 2.4rem);
    letter-spacing: -0.035em;
    margin: 0 0 0.9rem;
}

.section-lead {
    margin: 0;
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.75;
}

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(18px);
    background: linear-gradient(to bottom, rgba(11, 16, 32, 0.95), rgba(11, 16, 32, 0.75));
    border-bottom: 1px solid rgba(148, 163, 184, 0.08);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block: 0.9rem;
}

.logo-mark {
    font-weight: 600;
    font-size: 1.2rem;
    letter-spacing: 0.07em;
    text-transform: lowercase;
}

.nav {
    display: flex;
    align-items: center;
}

.nav-list {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin: 0;
    padding: 0;
}

.nav-link {
    font-size: 1rem;
    color: var(--text-secondary);
    position: relative;
    padding-block: 0.2rem;
    font-weight: 500;
}

.nav-link::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -0.3rem;
    width: 0;
    height: 1px;
    background: var(--accent-soft);
    transition: width var(--transition-fast);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius-pill);
    border: 1px solid rgba(129, 140, 248, 0.7);
    background: radial-gradient(circle at top left, rgba(129, 140, 248, 0.35), transparent 55%);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.nav-cta:hover {
    border-color: var(--accent-soft);
}

.nav-toggle {
    display: none;
    border: 0;
    background: transparent;
    padding: 0.25rem;
    cursor: pointer;
}

.nav-toggle-line {
    width: 20px;
    height: 1.6px;
    background: var(--text-primary);
    display: block;
    border-radius: 99px;
}

.nav-toggle-line + .nav-toggle-line {
    margin-top: 5px;
}

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

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at top left, rgba(79, 70, 229, 0.35), transparent 60%),
        radial-gradient(circle at bottom right, rgba(15, 23, 42, 0.9), transparent 55%),
        linear-gradient(135deg, #020617 0%, #020617 40%, #020617 100%);
    opacity: 0.9;
    pointer-events: none;
}

.hero-inner {
    position: relative;
    padding-block: 6rem 4rem;
}

.hero-title {
    font-size: clamp(2.5rem, 3vw + 1.6rem, 3.4rem);
    max-width: 700px;
    letter-spacing: -0.045em;
    margin: 0 0 1.1rem;
}

.hero-subtitle {
    margin: 0 0 2.4rem;
    max-width: 540px;
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.75em;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
    align-items: center;
    margin-bottom: 3rem;
}

.hero-meta {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
    padding: 1rem 1.1rem;
    background: rgba(15, 23, 42, 0.78);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(148, 163, 184, 0.25);
    box-shadow: var(--shadow-soft);
}

.hero-meta-item {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.meta-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--text-secondary);
}

.meta-value {
    font-size: 0.92rem;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    border-radius: var(--radius-pill);
    border: 0;
    padding: 0.7rem 1.4rem;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast),
        background var(--transition-fast), border-color var(--transition-fast),
        color var(--transition-fast);
}

.btn-primary {
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--accent-main), var(--accent-soft));
    box-shadow: 0 16px 40px rgba(59, 130, 246, 0.25);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 18px 48px rgba(59, 130, 246, 0.32);
}

.btn-ghost {
    background: transparent;
    border: 1px solid rgba(148, 163, 184, 0.5);
    color: var(--text-secondary);
}

.btn-ghost:hover {
    border-color: rgba(148, 163, 184, 0.9);
    color: var(--text-primary);
}

.btn-full {
    width: 100%;
}

/* ===================== SERVICES ===================== */

.section-services {
    background: radial-gradient(circle at top, rgba(15, 23, 42, 0.9), transparent 65%),
        var(--bg-secondary);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.8rem;
}

.service-card {
    background: linear-gradient(to bottom right, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.8));
    border-radius: var(--radius-lg);
    border: 1px solid rgba(148, 163, 184, 0.18);
    padding: 1.6rem 1.5rem 1.5rem;
    box-shadow: var(--shadow-subtle);
    transition: border-color var(--transition-med), transform var(--transition-med),
        box-shadow var(--transition-med), background var(--transition-med);
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: rgba(129, 140, 248, 0.9);
    box-shadow: 0 18px 50px rgba(15, 23, 42, 0.85);
}

.service-title {
    margin: 0 0 0.75rem;
    font-size: 1.25rem;
}

.service-body {
    margin: 0 0 1.1rem;
    font-size: 1.02rem;
    line-height: 1.65;
    color: var(--text-secondary);
}

.service-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.service-list li::before {
    content: '•';
    margin-right: 0.3rem;
    color: var(--accent-soft);
}

/* ===================== CONTACT ===================== */

.section-contact {
    background: var(--bg-main);
}

.contact-layout {
    display: flex;
    flex-direction: column;
    gap: 3.5rem;
}

.contact-content {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 2rem;
}

.contact-panel {
    background: linear-gradient(to bottom right, #020617, #020617);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(148, 163, 184, 0.28);
    padding: 1.7rem 1.6rem 1.6rem;
    box-shadow: var(--shadow-soft);
}

.contact-aside {
    align-self: stretch;
}

.contact-card {
    height: 100%;
    background: radial-gradient(circle at top left, rgba(79, 70, 229, 0.3), transparent 60%),
        #020617;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(148, 163, 184, 0.22);
    padding: 1.7rem 1.6rem 1.5rem;
}

.contact-card h3 {
    margin: 0 0 1rem;
}

.contact-list {
    list-style: none;
    margin: 0 0 1.25rem;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    font-size: 0.9rem;
}

.contact-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-secondary);
    margin-bottom: 0.2rem;
}

.contact-card a {
    color: var(--accent-soft);
}

.contact-card a:hover {
    color: var(--accent-main);
}

.contact-footnote p {
    margin: 0;
    font-size: 0.86rem;
    color: var(--text-secondary);
}

/* ---- Contact form ---- */

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-field {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.form-field label {
    font-size: 0.85rem;
}

.form-field input,
.form-field textarea {
    border-radius: 11px;
    border: 1px solid rgba(148, 163, 184, 0.45);
    background: rgba(15, 23, 42, 0.8);
    padding: 0.6rem 0.7rem;
    color: var(--text-primary);
    font-size: 0.9rem;
    line-height: 1.4;
    resize: vertical;
    min-height: 2.5rem;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
    color: rgba(148, 163, 184, 0.7);
}

.form-field input:focus,
.form-field textarea:focus {
    border-color: var(--accent-soft);
    outline: none;
    box-shadow: 0 0 0 1px rgba(129, 140, 248, 0.4);
}

.form-field.invalid input,
.form-field.invalid textarea {
    border-color: #f97373;
    box-shadow: 0 0 0 1px rgba(248, 113, 113, 0.4);
}

.field-error {
    min-height: 1.1rem;
    margin: 0;
    font-size: 0.78rem;
    color: #fecaca;
}

.form-helper {
    margin: 0;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.form-status {
    margin: 0.25rem 0 0;
    min-height: 1.1rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.form-status--success {
    color: #bbf7d0;
}

.form-status--error {
    color: #fecaca;
}

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

.site-footer {
    border-top: 1px solid rgba(148, 163, 184, 0.16);
    background: #020617;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block: 1.2rem;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.footer-branding {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.footer-tagline {
    font-size: 0.8rem;
}

.footer-meta {
    margin: 0;
}

/* ===================== ANIMATIONS ===================== */

.js-animate {
    opacity: 0;
    transform: translateY(18px);
    transition:
        opacity 420ms var(--ease-standard),
        transform 420ms var(--ease-standard);
}

.js-animate[data-animated='true'] {
    opacity: 1;
    transform: translateY(0);
}

.js-animate[data-animate-delay] {
    transition-delay: calc(var(--delay, 0ms));
}

/* ===================== RESPONSIVE ===================== */

@media (max-width: 900px) {
    .services-grid {
        grid-template-columns: 1fr;
    }

    .hero-meta {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header-inner {
        padding-block: 0.7rem;
    }

    .nav-toggle {
        display: inline-flex;
        flex-direction: column;
        justify-content: center;
    }

    .nav {
        position: fixed;
        inset-inline: 0;
        top: 3.1rem;
        padding: 0.8rem var(--gutter) 1rem;
        background: rgba(11, 16, 32, 0.98);
        border-bottom: 1px solid rgba(148, 163, 184, 0.18);
        transform: translateY(-120%);
        opacity: 0;
        pointer-events: none;
        transition: transform var(--transition-med), opacity var(--transition-med);
    }

    .nav.is-open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.9rem;
    }

    .hero-inner {
        padding-block: 5.2rem 3.2rem;
    }

    .hero-title {
        font-size: clamp(2.1rem, 6vw, 2.7rem);
    }

    .footer-inner {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 520px) {
    .section {
        padding-block: 4rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-meta {
        padding: 0.85rem 0.9rem;
    }

    .contact-panel,
    .contact-card {
        padding: 1.4rem 1.2rem 1.3rem;
    }
}