/* Design System & Reset */
:root {
    --bg-darker: #07090e;
    --bg-dark: #0f172a;
    --bg-card: rgba(15, 23, 42, 0.6);
    --border-color: rgba(255, 255, 255, 0.07);
    --border-hover: rgba(168, 85, 247, 0.45);
    
    --primary: #ef4444; /* Electric Red */
    --primary-gradient: linear-gradient(135deg, #ef4444 0%, #8b5cf6 50%, #3b82f6 100%); /* Red to Purple to Blue */
    --secondary: #3b82f6; /* Electric Blue */
    --secondary-gradient: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    --accent: #8b5cf6; /* Neon Purple */
    --accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #a855f7 100%);
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    
    --font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    --container-max-width: 1200px;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
}

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

body {
    background-color: var(--bg-darker);
    background-image: 
        radial-gradient(at 0% 0%, rgba(239, 68, 68, 0.06) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(59, 130, 246, 0.06) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-family);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

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

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

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

/* Selection */
::selection {
    background: rgba(139, 92, 246, 0.3);
    color: #fff;
}

/* Layout */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

main {
    flex-grow: 1;
    padding-top: 6rem;
    padding-bottom: 4rem;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(9, 13, 22, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    padding: 1.25rem 0;
    transition: var(--transition-fast);
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-weight: 800;
    font-size: 1.5rem;
    text-decoration: none;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: -0.5px;
}

.logo-icon {
    display: inline-block;
    animation: rotateLogo 8s linear infinite;
}

@keyframes rotateLogo {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

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

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Glassmorphism Cards & Panels */
.glass-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px) saturate(180%);
    -webkit-backdrop-filter: blur(12px) saturate(180%);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
    transition: var(--transition-normal);
}

.glass-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px 0 rgba(139, 92, 246, 0.18);
}

/* Typography elements */
.gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -1px;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin-bottom: 3rem;
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
    min-height: 70vh;
}

.hero-content {
    flex: 1;
    max-width: 650px;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.25);
    color: #fca5a5;
    border-radius: 9999px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero-glow {
    position: absolute;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.22) 0%, transparent 70%);
    filter: blur(30px);
    z-index: -1;
}

.flask-sphere {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    background: var(--primary-gradient);
    box-shadow: 0 0 50px rgba(139, 92, 246, 0.4);
    animation: floatSphere 6s ease-in-out infinite;
    position: relative;
    overflow: hidden;
}

.flask-sphere::before {
    content: '';
    position: absolute;
    top: -20%;
    left: -20%;
    width: 140%;
    height: 140%;
    background: radial-gradient(circle, rgba(255,255,255,0.2) 0%, transparent 60%);
    transform: rotate(30deg);
}

@keyframes floatSphere {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.8rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary-gradient);
    color: #fff;
    box-shadow: 0 4px 14px rgba(139, 92, 246, 0.35);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.55);
    transform: translateY(-2px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Grid Layouts */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

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

/* Feature Card */
.feature-card {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-icon {
    font-size: 2rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

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

.feature-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Project Card */
.project-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.project-category {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--secondary);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.project-title {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.project-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.project-tag {
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

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

/* Stats UI & Monitoring Dashboard */
.stat-panel {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.stat-label {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

.stat-icon {
    font-size: 1.25rem;
    color: var(--primary);
}

.stat-value {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 1rem;
    font-variant-numeric: tabular-nums;
}

.stat-progress-bg {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
    overflow: hidden;
}

.stat-progress-bar {
    height: 100%;
    width: 0;
    background: var(--primary-gradient);
    border-radius: 3px;
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.stat-meta {
    margin-top: 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

/* Flash Messages */
.flash-messages {
    position: fixed;
    top: 5.5rem;
    right: 2rem;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-width: 400px;
}

.flash-message {
    padding: 1rem 1.5rem;
    border-radius: var(--radius-sm);
    color: #fff;
    font-weight: 500;
    font-size: 0.9rem;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.25);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    animation: slideIn 0.3s ease-out;
}

.flash-success {
    background: rgba(16, 185, 129, 0.9);
    border-left: 4px solid #047857;
}

.flash-error {
    background: rgba(239, 68, 68, 0.9);
    border-left: 4px solid #b91c1c;
}

.flash-close {
    background: none;
    border: none;
    color: #fff;
    cursor: pointer;
    font-size: 1.1rem;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.flash-close:hover {
    opacity: 1;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Admin Dashboard Table */
.admin-summary {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.summary-card {
    text-align: center;
}

.summary-num {
    font-size: 2rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.summary-label {
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
}

.table-responsive {
    overflow-x: auto;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
    background: rgba(15, 23, 42, 0.3);
}

.admin-table th,
.admin-table td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.admin-table th {
    background: rgba(30, 41, 59, 0.7);
    color: var(--text-primary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
}

.admin-table tbody tr:hover {
    background: rgba(255, 255, 255, 0.02);
}

.admin-table td {
    color: var(--text-secondary);
    vertical-align: top;
}

.admin-table td strong {
    color: var(--text-primary);
}

.admin-table .timestamp {
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.admin-table .subject-badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 4px;
    font-size: 0.8rem;
    color: #a5b4fc;
    font-weight: 500;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-icon {
    font-size: 3rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

/* Footer */
footer {
    border-top: 1px solid var(--border-color);
    padding: 2.5rem 0;
    text-align: center;
    background: rgba(9, 13, 22, 0.5);
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: auto;
}

footer a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
}

footer a:hover {
    color: var(--primary);
}

/* Responsive Media Queries */
@media (max-width: 992px) {
    .hero {
        flex-direction: column-reverse;
        justify-content: center;
        text-align: center;
        gap: 2rem;
        min-height: auto;
        padding-top: 2rem;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 4.8rem;
        left: -100%;
        width: 100%;
        height: calc(100vh - 4.8rem);
        background: var(--bg-darker);
        flex-direction: column;
        align-items: center;
        padding: 3rem 0;
        transition: var(--transition-normal);
        border-top: 1px solid var(--border-color);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    }
    
    .nav-menu.open {
        left: 0;
    }
    
    .nav-link {
        font-size: 1.2rem;
    }
    
    .grid-2, .grid-3, .grid-4, .admin-summary {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .flash-messages {
        left: 1rem;
        right: 1rem;
        max-width: none;
    }
}

/* Custom Profile Avatar Placeholder */
.profile-avatar-placeholder {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.08) 0%, rgba(59, 130, 246, 0.08) 100%);
    border: 3px double rgba(139, 92, 246, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    font-weight: 800;
    color: var(--text-primary);
    box-shadow: 0 0 40px rgba(139, 92, 246, 0.2);
    position: relative;
    overflow: hidden;
    animation: floatSphere 6s ease-in-out infinite;
    user-select: none;
}

.profile-avatar-placeholder::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.15) 0%, transparent 60%);
    animation: rotateGlow 15s linear infinite;
    z-index: -1;
}

.profile-avatar-placeholder span {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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