@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ===== DESIGN TOKENS ===== */
:root {
    --navy:        #0a0f1e;
    --navy-mid:    #0f1629;
    --navy-light:  #151f38;
    --surface:     #1a2540;
    --surface-hi:  #1e2d4a;
    --border:      rgba(255,255,255,0.08);
    --border-hi:   rgba(255,255,255,0.14);

    --blue:        #3b82f6;
    --blue-hi:     #60a5fa;
    --blue-dim:    rgba(59,130,246,0.12);
    --blue-glow:   rgba(59,130,246,0.25);

    --text-1:      #f1f5f9;
    --text-2:      #94a3b8;
    --text-3:      #64748b;

    --radius-sm:   6px;
    --radius-md:   12px;
    --radius-lg:   20px;

    --ease:        cubic-bezier(0.4,0,0.2,1);
    --spring:      cubic-bezier(0.34,1.56,0.64,1);

    --shadow-sm:   0 1px 3px rgba(0,0,0,0.4);
    --shadow-md:   0 4px 16px rgba(0,0,0,0.5);
    --shadow-lg:   0 12px 40px rgba(0,0,0,0.6);
    --shadow-blue: 0 4px 24px rgba(59,130,246,0.3);
}

/* Light theme overrides */
body[data-theme="light"] {
    --navy:        #f8fafc;
    --navy-mid:    #f1f5f9;
    --navy-light:  #e2e8f0;
    --surface:     #ffffff;
    --surface-hi:  #f8fafc;
    --border:      rgba(0,0,0,0.08);
    --border-hi:   rgba(0,0,0,0.14);

    --blue:        #2563eb;
    --blue-hi:     #1d4ed8;
    --blue-dim:    rgba(37,99,235,0.08);
    --blue-glow:   rgba(37,99,235,0.18);

    --text-1:      #0f172a;
    --text-2:      #475569;
    --text-3:      #94a3b8;

    --shadow-sm:   0 1px 3px rgba(0,0,0,0.08);
    --shadow-md:   0 4px 16px rgba(0,0,0,0.1);
    --shadow-lg:   0 12px 40px rgba(0,0,0,0.14);
    --shadow-blue: 0 4px 24px rgba(37,99,235,0.2);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--navy);
    color: var(--text-1);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s var(--ease), color 0.3s var(--ease);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

main {
    flex: 1;
    padding-top: 72px;
}

a {
    color: var(--blue);
    text-decoration: none;
    transition: color 0.2s var(--ease);
}

a:hover {
    color: var(--blue-hi);
}

/* ===== HEADER / NAV ===== */
#main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10,15,30,0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: background 0.3s var(--ease), border-color 0.3s var(--ease), transform 0.4s var(--ease), opacity 0.4s var(--ease);
}

body[data-theme="light"] #main-header {
    background: rgba(248,250,252,0.88);
}

#main-header.hidden {
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
}

#main-header nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2.5rem;
    height: 72px;
    max-width: 1440px;
    margin: 0 auto;
    gap: 1.5rem;
}

/* Logo */
.logo a {
    display: flex;
    align-items: center;
}

.logo img {
    height: 44px;
    width: auto;
    transition: opacity 0.2s var(--ease);
}

.logo img:hover {
    opacity: 0.85;
}

/* Company name */
.company-name h1 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-1);
    letter-spacing: -0.01em;
    white-space: nowrap;
}

/* Nav links */
.nav-links {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-links ul {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-links a {
    display: block;
    padding: 0.4rem 0.85rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-2);
    border-radius: var(--radius-sm);
    transition: color 0.2s var(--ease), background 0.2s var(--ease);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-1);
    background: var(--blue-dim);
}

/* Nav controls */
.nav-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Theme button */
.theme-switcher button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-2);
    font-size: 0.9rem;
    cursor: pointer;
    transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.theme-switcher button:hover {
    color: var(--text-1);
    border-color: var(--border-hi);
    background: var(--blue-dim);
}

/* Language toggle */
.language-switcher {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-3);
    letter-spacing: 0.04em;
}

.switch {
    position: relative;
    display: inline-block;
    width: 36px;
    height: 20px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--surface);
    border: 1px solid var(--border-hi);
    border-radius: 20px;
    transition: background 0.3s var(--ease);
}

.slider::before {
    content: '';
    position: absolute;
    width: 14px;
    height: 14px;
    left: 2px;
    bottom: 2px;
    background: var(--text-3);
    border-radius: 50%;
    transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

input:checked + .slider {
    background: var(--blue-dim);
    border-color: var(--blue);
}

input:checked + .slider::before {
    transform: translateX(16px);
    background: var(--blue);
}

/* ===== FOOTER ===== */
.site-footer {
    background: var(--navy-mid);
    border-top: 1px solid var(--border);
    margin-top: auto;
}

.footer-content {
    max-width: 1440px;
    margin: 0 auto;
    padding: 3rem 2.5rem 0;
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    padding-bottom: 2.5rem;
}

.footer-brand .brand-logos {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.parton-logo .footer-logo {
    height: 40px;
    width: auto;
    opacity: 0.9;
    transition: opacity 0.2s var(--ease);
}

.parton-logo:hover .footer-logo {
    opacity: 1;
}

.footer-right-section {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 1.25rem;
}

.social-media-section {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 1rem;
}

.social-media {
    display: flex;
    gap: 0.75rem;
}

.social-media a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-2);
    font-size: 1rem;
    transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease);
}

.social-media a:hover {
    color: var(--blue-hi);
    border-color: var(--blue);
    background: var(--blue-dim);
    transform: translateY(-2px);
}

.working-hours p {
    font-size: 0.85rem;
    color: var(--text-3);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-links-grid.contact-only-grid {
    justify-self: end;
    align-self: center;
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 1.5rem 0;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.copyright p {
    font-size: 0.85rem;
    color: var(--text-3);
}

.legal-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex-wrap: wrap;
}

.legal-links a {
    font-size: 0.8rem;
    color: var(--text-3);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    transition: color 0.2s var(--ease);
}

.legal-links a:hover {
    color: var(--blue-hi);
}

.separator {
    color: var(--border-hi);
    font-weight: 300;
}

/* ===== SCROLL TO TOP ===== */
#scrollTopBtn {
    display: none;
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 2000;
    width: 44px;
    height: 44px;
    background: var(--surface);
    border: 1px solid var(--border-hi);
    border-radius: var(--radius-sm);
    color: var(--text-2);
    font-size: 1rem;
    cursor: pointer;
    transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease), transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

#scrollTopBtn:hover {
    color: var(--blue-hi);
    border-color: var(--blue);
    background: var(--blue-dim);
    transform: translateY(-3px);
    box-shadow: var(--shadow-blue);
}

/* ===== PARTICLES ===== */
#particles-js {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--navy-mid);
}

::-webkit-scrollbar-thumb {
    background: var(--surface-hi);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-3);
}

/* ===== LEGAL PAGES ===== */
.legal-main {
    padding: 6rem 2rem 4rem;
    max-width: 900px;
    margin: 0 auto;
}

.legal-content {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-2);
}

.legal-content section {
    margin-bottom: 2.5rem;
}

.legal-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-1);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.legal-content h4 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-1);
    margin: 1.5rem 0 0.5rem;
}

.legal-content p,
.legal-content li {
    margin-bottom: 0.75rem;
}

.legal-content ul {
    list-style: disc;
    padding-left: 1.5rem;
}

.legal-content a {
    color: var(--blue);
}

.legal-content a:hover {
    color: var(--blue-hi);
}

/* ===== LIGHT THEME — nav & footer contrast ===== */
body[data-theme="light"] .nav-links a { color: #475569; }
body[data-theme="light"] .nav-links a:hover,
body[data-theme="light"] .nav-links a.active { color: #0f172a; background: rgba(37,99,235,0.07); }

body[data-theme="light"] .company-name h1 { color: #0f172a; }
body[data-theme="light"] .theme-switcher button { color: #475569; border-color: #cbd5e1; }
body[data-theme="light"] .theme-switcher button:hover { color: #0f172a; border-color: #94a3b8; background: rgba(37,99,235,0.06); }
body[data-theme="light"] .language-switcher { color: #64748b; }

body[data-theme="light"] .copyright p { color: #475569; }
body[data-theme="light"] .legal-links a { color: #475569; }
body[data-theme="light"] .legal-links a:hover { color: #2563eb; }
body[data-theme="light"] .separator { color: #cbd5e1; }
body[data-theme="light"] .working-hours p { color: #475569; }
body[data-theme="light"] .working-hours i { color: #2563eb; }

body[data-theme="light"] .social-media a { color: #475569; border-color: #cbd5e1; background: #f1f5f9; }
body[data-theme="light"] .social-media a:hover { color: #2563eb; border-color: #2563eb; background: rgba(37,99,235,0.08); }

body[data-theme="light"] #scrollTopBtn { color: #475569; border-color: #cbd5e1; background: #f1f5f9; }
body[data-theme="light"] #scrollTopBtn:hover { color: #2563eb; border-color: #2563eb; background: rgba(37,99,235,0.08); }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
    #main-header nav {
        padding: 0 1.25rem;
        gap: 0.75rem;
    }

    .company-name {
        display: none;
    }

    .nav-links ul {
        gap: 0;
    }

    .nav-links a {
        padding: 0.4rem 0.6rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 640px) {
    #main-header nav {
        padding: 0 1rem;
    }

    .nav-links {
        display: none;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-right-section {
        align-items: flex-start;
    }

    .social-media-section {
        align-items: flex-start;
    }

    .footer-links-grid.contact-only-grid {
        justify-self: start;
    }

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