/* Shared CSS - Common styles for all pages */

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS Variables */
:root {
    --color-primary: #1D9E75;
    --color-primary-dark: #0F6E56;
    --color-text-body: #1a1a1a;
    --color-text-muted: #6b7280;
    --color-bg-page: #FAFAF9;
    --color-bg-card: #FFFFFF;
    --color-bg-dark: #111827;
    --color-code-bg: #1e1e2e;
    --color-border: #e5e7eb;
    --font-logo: 'JetBrains Mono', monospace;
    --font-display: 'DM Sans', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --font-code: 'JetBrains Mono', monospace;
}

/* Body Base Styles */
body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.75;
    color: var(--color-text-body);
    background: var(--color-bg-page);
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
header {
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-family: var(--font-logo);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.2s ease;
}

.logo:hover {
    color: var(--color-primary-dark);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--color-text-muted);
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.2s ease;
    position: relative;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width 0.2s ease;
}

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

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

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

.nav-links a.active::after {
    width: 100%;
}

/* Button Styles */
.btn-primary, .btn-cta {
    display: inline-block;
    padding: 12px 28px;
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    color: #ffffff;
    background: var(--color-primary);
    border: 2px solid var(--color-primary);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary:hover, .btn-cta:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-1px);
}

.btn-primary:active, .btn-cta:active {
    transform: translateY(0);
}

/* Secondary CTA Button */
.btn-secondary {
    display: inline-block;
    padding: 12px 28px;
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    color: var(--color-primary);
    background: transparent;
    border: 2px solid var(--color-primary);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: #ffffff;
    transform: translateY(-1px);
}

/* Danger Button */
.btn-danger {
    display: inline-block;
    padding: 12px 28px;
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    text-decoration: none;
    color: #ffffff;
    background: #dc2626;
    border: 2px solid #dc2626;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-danger:hover {
    background: #b91c1c;
    border-color: #b91c1c;
    transform: translateY(-1px);
}

/* Special Button */
.btn-special {
    display: inline-block;
    padding: 14px 32px;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-decoration: none;
    color: #ffffff;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(29, 158, 117, 0.3);
}

.btn-special:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(29, 158, 117, 0.4);
}

/* Button Group */
.btn-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    align-items: center;
    margin: 2rem 0;
}

/* Button Sizes */
.btn-small {
    padding: 8px 18px;
    font-size: 0.85rem;
}

.btn-large {
    padding: 16px 36px;
    font-size: 1.05rem;
}

/* Disabled Button */
.btn-disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Footer Styles */
footer {
    background: var(--color-bg-card);
    color: var(--color-text-muted);
    padding: 2rem 0;
    border-top: 1px solid var(--color-border);
    position: relative;
}

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

.footer-tagline {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin: 0;
}

.footer-bottom {
    text-align: center;
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-page);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary);
}

/* Mobile Navigation Toggle */
.nav-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--color-border);
    padding: 8px;
    cursor: pointer;
    z-index: 1001;
    border-radius: 4px;
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-muted);
    position: relative;
    transition: all 0.3s ease;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--color-text-muted);
    left: 0;
    transition: all 0.3s ease;
}

.hamburger::before {
    top: -8px;
}

.hamburger::after {
    top: 8px;
}

/* Hamburger animation when active */
.nav-toggle.nav-active .hamburger {
    background: transparent;
}

.nav-toggle.nav-active .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.nav-toggle.nav-active .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

/* Responsive Design - Shared */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    .nav-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        padding: 1rem 0;
        border-bottom: 1px solid var(--color-border);
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
    }

    .nav-links.nav-open {
        display: flex;
    }

    .nav-links li {
        text-align: center;
        padding: 0.75rem 0;
    }

    .nav-links a {
        font-size: 1rem;
    }

    .logo {
        font-size: 1.3rem;
    }

    .footer-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .btn-group {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-primary, .btn-cta, .btn-secondary, .btn-danger, .btn-special {
        text-align: center;
        width: 100%;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.2rem;
    }
}

/* Shared post-image used in home card header */
.post-image {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 80px;
    background: linear-gradient(135deg, #f0fdf9, #e6f7f2);
    border-bottom: 1px solid var(--color-border);
}

.post-image i {
    font-size: 2rem;
    color: var(--color-primary);
}

.contact-icons {
    display: flex;
    gap: 20px;
    align-items: center;
}

.contact-icons a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
}

.contact-icons a:hover {
    color: var(--color-primary);
}

.contact-icons svg {
    vertical-align: middle;
}

.mermaid-bordered .node rect,
.mermaid-bordered .node circle,
.mermaid-bordered .node ellipse,
.mermaid-bordered .node polygon {
  stroke: #1D9E75 !important;
  stroke-width: 2px !important;
}

pre { position: relative; }