/* ==========================================================================
   Tarun Murali - Network Engineer Portfolio Stylesheet
   Theme: Network & Infrastructure Engineering / Modern Dark Slate
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:ital,wght@0,300;0,400;0,500;0,700;1,400&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
    --bg-dark: #080c14;
    --bg-card: #0f172a;
    --bg-card-hover: #1e293b;
    --bg-surface: #131d31;
    --bg-terminal: #070a10;
    --border-color: #1e293b;
    --border-bright: #334155;
    
    --accent-blue: #0ea5e9;
    --accent-cyan: #06b6d4;
    --accent-emerald: #10b981;
    --accent-amber: #f59e0b;
    --accent-indigo: #6366f1;
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --text-dim: #64748b;

    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-family: var(--font-sans);
    background-color: var(--bg-dark);
    color: var(--text-primary);
}

body {
    min-height: 100vh;
    overflow-x: hidden;
    line-height: 1.6;
    background-color: var(--bg-dark);
    background-image: 
        radial-gradient(circle at 15% 20%, rgba(14, 165, 233, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 85% 80%, rgba(16, 185, 129, 0.04) 0%, transparent 40%);
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
    background: var(--border-bright);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-blue);
}

/* Base Link & Focus Styles */
a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
}

/* Navigation Bar */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    background-color: rgba(8, 12, 20, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(30, 41, 59, 0.8);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--accent-cyan);
    transition: transform 0.2s ease;
}
.logo-link:hover {
    transform: translateX(2px);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.2rem 0.6rem;
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: 9999px;
    font-size: 0.75rem;
    color: var(--accent-emerald);
    font-weight: 600;
}

.pulse-dot {
    width: 6px;
    height: 6px;
    background-color: var(--accent-emerald);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent-emerald);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { opacity: 0.4; transform: scale(0.9); }
    50% { opacity: 1; transform: scale(1.2); }
    100% { opacity: 0.4; transform: scale(0.9); }
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-item {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: all 0.2s ease;
    padding: 0.4rem 0.75rem;
    border-radius: 0.375rem;
}

.nav-item:hover {
    color: var(--text-primary);
    background-color: var(--bg-card);
}

.nav-item.active {
    color: var(--accent-blue);
    background-color: rgba(14, 165, 233, 0.1);
    border: 1px solid rgba(14, 165, 233, 0.2);
    font-weight: 600;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 0.75rem;
    border-radius: 0.375rem;
    font-size: 1.25rem;
}

.mobile-nav-drawer {
    display: none;
    flex-direction: column;
    padding: 1rem 1.5rem;
    background-color: var(--bg-dark);
    border-bottom: 1px solid var(--border-color);
    gap: 0.5rem;
}

.mobile-nav-drawer.open {
    display: flex;
}

/* Main Container & Page Views */
main {
    margin-top: 4.5rem;
    min-height: calc(100vh - 9rem);
}

.page-view {
    display: none;
    animation: fadeIn 0.35s ease-in-out forwards;
    padding-bottom: 4rem;
}

.page-view.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Page Section Headers */
.section-header {
    text-align: center;
    max-width: 768px;
    margin: 0 auto 2.5rem auto;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-cyan);
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.25);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* Cards & Surfaces */
.net-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    transition: all 0.25s ease;
}

.net-card:hover {
    border-color: var(--border-bright);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

.net-card-interactive:hover {
    transform: translateY(-3px);
    border-color: var(--accent-blue);
}

/* Terminal Window Styles */
.terminal-window {
    background-color: var(--bg-terminal);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.7);
    font-family: var(--font-mono);
}

.terminal-header {
    background-color: #0d1322;
    padding: 0.6rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
}

.terminal-dots {
    display: flex;
    gap: 0.5rem;
}

.terminal-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}
.dot-red { background-color: #ef4444; }
.dot-yellow { background-color: #f59e0b; }
.dot-green { background-color: #10b981; }

.terminal-title {
    font-size: 0.8rem;
    color: var(--text-dim);
    font-weight: 500;
}

.terminal-body {
    padding: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.925rem;
    line-height: 1.7;
}

.prompt-line {
    color: var(--accent-cyan);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.terminal-input-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px dashed var(--border-color);
}

.terminal-input {
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    flex: 1;
}

/* About Me Split Animations & Profile Card */
.animate-slide-left {
    animation: slideInLeft 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-slide-right {
    animation: slideInRight 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(40px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.profile-card-frame {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.9), rgba(11, 19, 41, 0.95));
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.8);
}
.profile-card-frame:hover {
    box-shadow: 0 25px 50px -10px rgba(6, 182, 212, 0.2);
}

/* Homelab Topology Map */
.topology-container {
    position: relative;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
}

.topology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.node-card {
    background-color: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 0.6rem;
    padding: 1.25rem;
    cursor: pointer;
    transition: all 0.25s ease;
    position: relative;
}

.node-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(6, 182, 212, 0.15);
}

.node-icon {
    font-size: 1.75rem;
    color: var(--accent-cyan);
    margin-bottom: 0.75rem;
}

.node-title {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-primary);
}

.node-ip {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-blue);
    margin-top: 0.25rem;
}

.node-badge {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    font-size: 0.7rem;
    font-family: var(--font-mono);
    padding: 0.15rem 0.5rem;
    border-radius: 0.25rem;
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-emerald);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(4, 7, 12, 0.85);
    backdrop-filter: blur(8px);
    z-index: 100;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}

.modal-overlay.open {
    display: flex;
}

.modal-content {
    background-color: var(--bg-card);
    border: 1px solid var(--border-bright);
    border-radius: 0.75rem;
    max-width: 720px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
    animation: modalIn 0.25s ease-out forwards;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.modal-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-close-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    transition: color 0.2s ease;
}
.modal-close-btn:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
}

/* Search & Filters */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 2rem;
}

.filter-btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.filter-btn {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 0.4rem 0.9rem;
    border-radius: 0.375rem;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.filter-btn:hover {
    color: var(--text-primary);
    border-color: var(--border-bright);
}

.filter-btn.active {
    background-color: rgba(14, 165, 233, 0.15);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
    font-weight: 600;
}

.search-input-box {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    padding: 0.45rem 0.9rem;
    color: var(--text-primary);
    font-size: 0.875rem;
    outline: none;
    width: 100%;
    max-width: 280px;
    transition: border-color 0.2s ease;
}

.search-input-box:focus {
    border-color: var(--accent-cyan);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 150;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background-color: var(--bg-card);
    border: 1px solid var(--accent-emerald);
    color: var(--text-primary);
    padding: 0.75rem 1.25rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    animation: toastIn 0.3s ease forwards;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Footer */
footer {
    background-color: var(--bg-dark);
    border-top: 1px solid var(--border-color);
    padding: 2.5rem 1.5rem;
    text-align: center;
    color: var(--text-dim);
    font-size: 0.85rem;
}

.footer-status {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-cyan);
    margin-top: 0.5rem;
}

/* Media Queries */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    .mobile-menu-btn {
        display: block;
    }
    .section-title {
        font-size: 1.75rem;
    }
    .search-input-box {
        max-width: 100%;
    }
}