/* SignalVC Main CSS - Public Pages
 * Premium Enterprise SaaS Aesthetic
 * ================================================== */

:root {
    /* App Shell - Dark Navy Gradient */
    --app-shell-900: #1e2f4c;
    --app-shell-800: #20334e;
    --app-shell-700: #36445a;

    /* Surfaces */
    --surface-0: #ffffff;
    --surface-50: #fdfdfd;
    --surface-sidebar: #f0f1f6;
    --surface-panel: #f6f6f7;
    --surface-selected: #e2e5eb;

    /* Borders */
    --border: #d9d9d8;
    --border-soft: #e3e4e5;

    /* Text */
    --text-strong: #272629;
    --text: #626161;
    --text-muted: #8b8b90;

    /* Brand / Primary Blue */
    --primary: #3469f3;
    --primary-600: #2e65f0;
    --primary-100: #e8f1fd;

    /* Legacy */
    --primary-dark: #2e65f0;
    --dark: #272629;
    --light: #fdfdfd;
    --gray: #8b8b90;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
    background: linear-gradient(135deg, var(--app-shell-800) 0%, var(--app-shell-900) 50%, var(--app-shell-700) 100%);
    color: var(--dark);
    line-height: 1.6;
    min-height: 100vh;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 16px;
    left: 16px;
    right: 16px;
    height: 60px;
    background: var(--surface-0);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
    border-radius: 16px;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    z-index: 100;
}

.nav-brand {
    font-weight: 700;
    background: linear-gradient(135deg, var(--app-shell-800) 0%, var(--app-shell-900) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    font-size: 1.25rem;
    margin-right: auto;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    height: 100%;
}

.nav-link {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
    display: flex;
    align-items: center;
    height: 100%;
}

.nav-link:hover {
    color: var(--primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    border-radius: 999px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid transparent;
    text-decoration: none;
}

.btn-outline {
    border-color: var(--border);
    color: var(--text-strong);
    height: auto;
    background-color: var(--surface-0);
}

.btn-outline:hover {
    background-color: var(--surface-panel);
    border-color: var(--primary);
}

.btn-primary {
    background: linear-gradient(135deg, var(--app-shell-800) 0%, var(--app-shell-900) 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(30, 47, 76, 0.25);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--app-shell-700) 0%, var(--app-shell-800) 100%);
    box-shadow: 0 4px 12px rgba(30, 47, 76, 0.35);
}

/* Footer */
.footer {
    padding: 3rem 2rem;
    background: var(--app-shell-900);
    color: white;
    margin: 16px;
    border-radius: 20px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.footer-logo {
    font-weight: 700;
    color: white;
    font-size: 1.25rem;
    margin-bottom: 1rem;
    display: inline-block;
}

.footer-about {
    margin-bottom: 1rem;
    color: var(--gray);
}

.footer-title {
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.footer-links {
    list-style: none;
}

.footer-link {
    margin-bottom: 0.5rem;
}

.footer-link a {
    color: var(--gray);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-link a:hover {
    color: white;
}

.copyright {
    text-align: center;
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255,255,255,0.1);
    color: var(--gray);
    font-size: 0.875rem;
}

/* Main content area */
main {
    padding-top: 92px; /* Match navbar height + margin */
    min-height: calc(100vh - 60px);
    margin: 0 16px;
}

/* Page container for public pages */
.page-container {
    background: var(--surface-0);
    border-radius: 24px;
    min-height: calc(100vh - 124px);
    padding: 2rem;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.10);
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        padding: 0 1rem;
        top: 8px;
        left: 8px;
        right: 8px;
    }

    .nav-links {
        display: none;
    }

    .btn {
        width: 100%;
        max-width: 300px;
    }

    .footer-container {
        grid-template-columns: 1fr;
    }

    main {
        padding-top: 84px;
        margin: 0 8px;
    }

    .page-container {
        border-radius: 16px;
        padding: 1.5rem;
    }

    .footer {
        margin: 8px;
        border-radius: 16px;
    }
}