/* ==========================================================================
   nav-footer.css — Shared navigation, buttons, and footer for marketing pages
   Depends on: base.css
   Used by: landing.html, pricing.html
   ========================================================================== */

/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--nav-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--accent-blue);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1rem;
    color: white;
    font-family: var(--font-body);
}

[data-theme="dark"] .logo-icon {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
}

.logo-text {
    font-family: var(--font-display);
    font-size: 1.35rem;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

/* Sigma/R branding in logo */
.sigma {
    font-family: 'Times New Roman', serif;
    font-style: italic;
    color: var(--accent-blue);
}

.return-r {
    font-family: var(--font-body);
    color: var(--accent-green);
    font-size: 0.82em;
    font-weight: 800;
    font-style: normal;
    vertical-align: baseline;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Nav Links */
.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: var(--text-primary);
}

/* ==========================================================================
   THEME TOGGLE BUTTON
   ========================================================================== */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem 0.75rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
}

.theme-toggle:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--text-muted);
}

/* ==========================================================================
   BUTTONS
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
    white-space: nowrap;
}

.nav-links .btn {
    padding: 0.8rem 1.5rem;
    border-radius: 10px;
}

/* Nav button override — outlined/ghost style in the nav bar */
.nav-links .btn-primary {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-color);
    box-shadow: none;
    font-weight: 600;
}

.nav-links .btn-primary:hover {
    background: var(--bg-hover);
    border-color: var(--text-dim);
    transform: none;
    box-shadow: none;
}

/* Standalone/page buttons — solid, professional blue */
.btn-primary {
    background: #0b6fda;
    color: #ffffff;
    box-shadow: var(--shadow-sm);
    font-weight: 700;
    letter-spacing: 0.01em;
}

.btn-primary:hover {
    background: #0960be;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Dark mode: gradient with glow for energy */
[data-theme="dark"] .btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.25);
}

[data-theme="dark"] .btn-primary:hover {
    box-shadow: 0 12px 35px rgba(59, 130, 246, 0.30);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-hover);
    border-color: var(--text-dim);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.05rem;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
    padding: 3rem 2rem;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
    background: var(--footer-bg);
    color: var(--footer-text);
}

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

.footer-content,
.footer-main {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand {
    max-width: 380px;
}

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

.footer-brand .logo-icon {
    background: rgba(255, 255, 255, 0.15);
}

.footer-brand p {
    color: var(--footer-text);
    opacity: 0.7;
    font-size: 0.9rem;
    margin-top: 0.75rem;
    line-height: 1.6;
}

.footer-links {
    display: flex;
    gap: 4rem;
}

.footer-column h4 {
    color: var(--footer-text);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    font-weight: 600;
}

.footer-column a {
    display: block;
    color: var(--footer-text);
    opacity: 0.7;
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 0.6rem;
    transition: opacity 0.2s;
}

.footer-column a:hover {
    color: var(--footer-text);
    opacity: 1;
}

/* Footer disclaimer (landing page) */
.footer-disclaimer {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    margin-bottom: 1.5rem;
}

.footer-disclaimer p {
    color: var(--footer-text);
    opacity: 0.6;
    font-size: 0.78rem;
    line-height: 1.6;
}

.footer-disclaimer strong {
    color: var(--footer-text);
    opacity: 0.8;
}

/* Footer bottom bar */
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom p {
    color: var(--footer-text);
    opacity: 0.7;
    font-size: 0.85rem;
}

.footer-legal {
    display: flex;
    gap: 1.5rem;
}

.footer-legal a {
    color: var(--footer-text);
    opacity: 0.7;
    text-decoration: none;
    font-size: 0.85rem;
    transition: opacity 0.2s;
}

.footer-legal a:hover {
    color: var(--footer-text);
    opacity: 1;
}

/* ==========================================================================
   RESPONSIVE — Nav & Footer
   ========================================================================== */
@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
    }

    .footer-content,
    .footer-main {
        flex-direction: column;
    }

    .footer-links {
        flex-direction: column;
        gap: 2rem;
    }

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

    .footer-legal {
        justify-content: center;
    }
}