/* ==========================================================================
   MINJUNG.BEST - Vibe Coding Portfolio & AWS Server Dashboard Design System
   ========================================================================== */

/* --- CSS Variables & Theme System --- */
:root {
    /* Dark Theme (Default) */
    --bg-main: #060913;
    --bg-secondary: #0b1120;
    --bg-card: rgba(15, 23, 42, 0.72);
    --bg-card-hover: rgba(30, 41, 59, 0.85);
    --card-border: rgba(255, 255, 255, 0.12);
    --card-border-glow: rgba(56, 189, 248, 0.35);

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent-cyan: #38bdf8;
    --accent-blue: #6366f1;
    --accent-purple: #a855f7;
    --accent-green: #34d399;
    --accent-amber: #fbbf24;
    --accent-rose: #f43f5e;

    --gradient-brand: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
    --gradient-card: linear-gradient(180deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
    --gradient-glow: radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.15), transparent 70%);

    --nav-bg: rgba(6, 9, 19, 0.75);
    --glass-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.5);
    --particle-line: rgba(56, 189, 248, 0.18);
    --particle-dot: rgba(56, 189, 248, 0.7);

    --font-heading: 'Outfit', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Overrides */
[data-theme="light"] {
    --bg-main: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-hover: rgba(255, 255, 255, 0.98);
    --card-border: rgba(203, 213, 225, 0.8);
    --card-border-glow: rgba(2, 132, 199, 0.4);

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    --accent-cyan: #0284c7;
    --accent-blue: #4f46e5;
    --accent-purple: #9333ea;
    --accent-green: #16a34a;
    --accent-amber: #d97706;

    --gradient-brand: linear-gradient(135deg, #0284c7 0%, #4f46e5 50%, #9333ea 100%);
    --gradient-card: linear-gradient(180deg, rgba(241, 245, 249, 0.6) 0%, rgba(255, 255, 255, 0) 100%);
    --gradient-glow: radial-gradient(circle at 50% 0%, rgba(2, 132, 199, 0.12), transparent 70%);

    --nav-bg: rgba(248, 250, 252, 0.85);
    --glass-shadow: 0 10px 30px -5px rgba(148, 163, 184, 0.25);
    --particle-line: rgba(2, 132, 199, 0.18);
    --particle-dot: rgba(2, 132, 199, 0.65);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-heading);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
}

.font-mono {
    font-family: var(--font-mono);
}

/* --- Particle Canvas Background --- */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: auto;
}

/* --- Header / Navbar --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    z-index: 100;
    background: var(--nav-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--card-border);
    transition: var(--transition);
}

.nav-container {
    max-width: 1280px;
    height: 100%;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 800;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.logo-icon-box {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--gradient-brand);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    box-shadow: 0 4px 12px rgba(56, 189, 248, 0.3);
}

.logo-icon {
    width: 20px;
    height: 20px;
}

.logo-dot {
    color: var(--accent-cyan);
}

.vibe-badge {
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    border-radius: 999px;
    background: rgba(56, 189, 248, 0.15);
    color: var(--accent-cyan);
    border: 1px solid rgba(56, 189, 248, 0.3);
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-weight: 700;
}

.badge-icon {
    width: 12px;
    height: 12px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.8rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.4rem 0.75rem;
    border-radius: 8px;
}

.nav-link svg {
    width: 16px;
    height: 16px;
}

.nav-link:hover, .nav-link.active {
    color: var(--accent-cyan);
    background: rgba(56, 189, 248, 0.08);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.theme-toggle-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.9rem;
    border-radius: 10px;
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.theme-toggle-btn:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-1px);
}

.theme-toggle-btn svg {
    width: 18px;
    height: 18px;
}

/* Theme Icon visibility toggle */
[data-theme="dark"] .icon-sun { display: inline-block; color: #f59e0b; }
[data-theme="dark"] .icon-moon { display: none; }

[data-theme="light"] .icon-sun { display: none; }
[data-theme="light"] .icon-moon { display: inline-block; color: var(--accent-purple); }

.github-btn {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: var(--transition);
}

.github-btn:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.github-btn svg {
    width: 20px;
    height: 20px;
}

/* --- Layout Main --- */
.main-content {
    position: relative;
    z-index: 1;
    max-width: 1280px;
    margin: 0 auto;
    padding: 100px 1.5rem 60px;
}

/* --- Hero Section --- */
.hero-section {
    min-height: 75vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px 0 60px;
}

.hero-container {
    max-width: 860px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hero-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.4rem 1.1rem;
    border-radius: 999px;
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    font-size: 0.88rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.chip-icon {
    width: 16px;
    height: 16px;
    color: var(--accent-green);
}

.status-dot-pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--accent-green);
    box-shadow: 0 0 10px var(--accent-green);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.7); }
    70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(52, 211, 153, 0); }
    100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(52, 211, 153, 0); }
}

.hero-title {
    font-size: 3.8rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
}

.gradient-text {
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 680px;
    margin-bottom: 2.2rem;
    font-weight: 400;
}

.hero-cta-group {
    display: flex;
    gap: 1rem;
    margin-bottom: 3.5rem;
    flex-wrap: wrap;
    justify-content: center;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.85rem 1.8rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: var(--gradient-brand);
    color: #ffffff;
    box-shadow: 0 8px 24px -4px rgba(56, 189, 248, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px -2px rgba(56, 189, 248, 0.5);
}

.btn-glass {
    background: var(--bg-card);
    border-color: var(--card-border);
    color: var(--text-primary);
    backdrop-filter: blur(12px);
}

.btn-glass:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

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

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

.btn-block {
    width: 100%;
}

/* --- Hero Stats Strip --- */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    padding: 1.25rem 2.2rem;
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    backdrop-filter: blur(16px);
    box-shadow: var(--glass-shadow);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.9rem;
}

.stat-icon-wrapper {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon-wrapper svg {
    width: 22px;
    height: 22px;
}

.stat-info {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.stat-number {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-label {
    font-size: 0.78rem;
    color: var(--text-muted);

}

.stat-divider {
    width: 1px;
    height: 36px;
    background: var(--card-border);
}

/* --- Section Global Headers --- */
.section-header {
    text-align: center;
    max-width: 650px;
    margin: 0 auto 3.5rem;
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--accent-cyan);
    margin-bottom: 0.6rem;
}

.section-badge svg {
    width: 14px;
    height: 14px;
}

.section-title {
    font-size: 2.3rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 0.6rem;
}

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

/* --- Dashboard Section (4 Cards) --- */
.dashboard-section {
    padding: 60px 0;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.dash-card {
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    backdrop-filter: blur(16px);
    box-shadow: var(--glass-shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.dash-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-brand);
    opacity: 0.4;
    transition: var(--transition);
}

.dash-card:hover {
    transform: translateY(-5px);
    border-color: var(--card-border-glow);
    box-shadow: 0 16px 36px -10px rgba(56, 189, 248, 0.2);
}

.dash-card:hover::before {
    opacity: 1;
}

.card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.card-title-box {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.card-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-icon svg {
    width: 22px;
    height: 22px;
}

.icon-cyan { background: rgba(56, 189, 248, 0.15); color: var(--accent-cyan); }
.icon-purple { background: rgba(168, 85, 247, 0.15); color: var(--accent-purple); }
.icon-green { background: rgba(52, 211, 153, 0.15); color: var(--accent-green); }
.icon-amber { background: rgba(251, 191, 36, 0.15); color: var(--accent-amber); }

.card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.card-subtitle {
    font-size: 0.78rem;
    color: var(--text-muted);
    display: block;
}

/* Badges */
.badge {
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.badge svg { width: 12px; height: 12px; }

.badge-success { background: rgba(52, 211, 153, 0.15); color: var(--accent-green); border: 1px solid rgba(52, 211, 153, 0.3); }
.badge-info { background: rgba(56, 189, 248, 0.15); color: var(--accent-cyan); border: 1px solid rgba(56, 189, 248, 0.3); }
.badge-amber { background: rgba(251, 191, 36, 0.15); color: var(--accent-amber); border: 1px solid rgba(251, 191, 36, 0.3); }

/* Card Body Metrics */
.card-body {
    flex-grow: 1;
    margin-bottom: 1.25rem;
}

.metric-list {
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
}

.metric-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.85rem;
}

.metric-name {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.metric-name svg { width: 14px; height: 14px; color: var(--text-muted); }

.metric-value {
    font-weight: 600;
    color: var(--text-primary);
}

.text-green { color: var(--accent-green); }
.text-cyan { color: var(--accent-cyan); }
.text-purple { color: var(--accent-purple); }
.text-amber { color: var(--accent-amber); }

/* Progress Bars */
.progress-group {
    margin-bottom: 0.85rem;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.82rem;
    margin-bottom: 0.3rem;
    color: var(--text-secondary);
}

.progress-info svg { width: 14px; height: 14px; }

.progress-bar {
    width: 100%;
    height: 7px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 999px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    border-radius: 999px;
    transition: width 0.8s ease-in-out;
}

.fill-cyan { background: var(--accent-cyan); box-shadow: 0 0 8px var(--accent-cyan); }
.fill-purple { background: var(--accent-purple); box-shadow: 0 0 8px var(--accent-purple); }
.fill-amber { background: var(--accent-amber); box-shadow: 0 0 8px var(--accent-amber); }

/* Service tags in Card 4 */
.service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.service-tag {
    padding: 0.4rem 0.75rem;
    border-radius: 8px;
    font-size: 0.8rem;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--card-border);
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.service-tag svg { width: 14px; height: 14px; color: var(--accent-cyan); }

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    border-top: 1px solid var(--card-border);
    font-size: 0.8rem;
}

.footer-note {
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.footer-note svg { width: 14px; height: 14px; }

.card-link {
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    transition: var(--transition);
}

.card-link:hover {
    color: var(--text-primary);
    transform: translateX(2px);
}

.card-link svg { width: 14px; height: 14px; }

.spin-slow {
    animation: spin 8s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}


/* --- Features Showcase Section --- */
.features-section {
    padding: 80px 0;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 1.8rem;
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(16px);
    box-shadow: var(--glass-shadow);
    transition: var(--transition);
    position: relative;
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent-cyan);
}

.highlight-card {
    border-color: rgba(56, 189, 248, 0.4);
    box-shadow: 0 10px 30px rgba(56, 189, 248, 0.15);
}

.feature-badge {
    position: absolute;
    top: 1.2rem;
    right: 1.2rem;
    font-size: 0.68rem;
    font-weight: 800;
    padding: 0.2rem 0.6rem;
    border-radius: 999px;
    background: var(--gradient-brand);
    color: #ffffff;
    letter-spacing: 0.05em;
}

.feature-icon-wrapper {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: rgba(56, 189, 248, 0.15);
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
}

.feature-icon-wrapper svg {
    width: 26px;
    height: 26px;
}

.icon-blue { background: rgba(99, 102, 241, 0.15); color: var(--accent-blue); }
.icon-purple { background: rgba(168, 85, 247, 0.15); color: var(--accent-purple); }

.feature-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
}

.feature-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    flex-grow: 1;
    line-height: 1.5;
}

.feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1.5rem;
}

.feature-tags span {
    font-size: 0.75rem;
    padding: 0.25rem 0.55rem;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.feature-tags svg { width: 12px; height: 12px; }

.feature-actions {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}


/* --- Tech Stack Section --- */
.stack-section {
    padding: 60px 0;
}

.stack-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

.stack-card {
    background: var(--bg-card);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1.6rem;
    text-align: center;
    backdrop-filter: blur(12px);
    transition: var(--transition);
}

.stack-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-4px);
}

.stack-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(56, 189, 248, 0.12);
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.stack-icon svg { width: 24px; height: 24px; }

.stack-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stack-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
}


/* --- Footer --- */
.footer {
    margin-top: 80px;
    border-top: 1px solid var(--card-border);
    padding: 40px 0;
    background: var(--bg-secondary);
}

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

.footer-brand p {
    font-size: 0.88rem;
    color: var(--text-muted);
}

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

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.3rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent-cyan);
}

.footer-links svg { width: 14px; height: 14px; }

.footer-copy {
    font-size: 0.85rem;
    color: var(--text-muted);
}


/* --- Responsive Breakpoints --- */
@media (max-width: 1024px) {
    .dashboard-grid, .portfolio-grid, .stack-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-title {
        font-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; /* Mobile menu can collapse or simplify */
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .dashboard-grid, .portfolio-grid, .stack-grid {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }

    .stat-divider {
        width: 80%;
        height: 1px;
    }

    .mobile-br {
        display: none;
    }
}