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

:root {
    /* OBSIDIAN & NEON THEME */
    --bg-main: #050508; /* Deepest Obsidian */
    --bg-sidebar: rgba(10, 10, 15, 0.6); /* Glass Dark */
    --bg-card: rgba(18, 18, 25, 0.4); /* Glass Surface */
    --bg-card-hover: rgba(25, 25, 35, 0.6);
    --bg-surface: #121219; /* Solid Dark */
    
    /* ACCENTS */
    --accent-purple: #6366F1; /* Vivid Indigo */
    --accent-purple-hover: #818CF8;
    --accent-cyan: #06B6D4; /* Neon Cyan */
    --accent-cyan-hover: #22D3EE;
    --accent-glow: rgba(99, 102, 241, 0.5);
    
    /* TEXT */
    --text-primary: #FFFFFF;
    --text-secondary: #94A3B8;
    --text-muted: #475569;
    --text-sidebar: #94A3B8;
    --text-sidebar-active: #FFFFFF;
    
    /* BORDERS */
    --border-color: rgba(255, 255, 255, 0.1);
    --border-light: rgba(255, 255, 255, 0.05);
    
    /* STATE */
    --color-success: #10B981;
    --color-danger: #EF4444;
    --color-warning: #F59E0B;
    
    /* SIZING & LAYOUT */
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 80px;
    
    /* SHADOWS & GLOWS */
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.6);
    --shadow-card: 0 25px 50px -12px rgba(0, 0, 0, 0.7);
    --glow-primary: 0 0 20px rgba(99, 102, 241, 0.4);
    --glow-cyan: 0 0 20px rgba(6, 182, 212, 0.4);
    
    /* RADII */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-card: 24px;
    
    /* SPACING */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
}

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

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

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* TYPOGRAPHY */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: 3rem; font-weight: 800; }
h2 { font-size: 2.25rem; font-weight: 800; }
h3 { font-size: 1.5rem; }

.text-accent { color: var(--accent-purple); }
.text-cyan { color: var(--accent-cyan); }
.text-muted { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }

/* GLASSMORPHISM & UTILITIES */
.glass-panel {
    background: var(--bg-sidebar);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-card);
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

/* BUTTONS */
.btn {
    padding: 12px 24px;
    border-radius: var(--radius-md);
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    line-height: 1;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-purple) 0%, var(--accent-cyan) 100%);
    color: white;
    box-shadow: var(--glow-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(6, 182, 212, 0.6);
}

.btn-primary::after {
    content: '';
    position: absolute;
    top: 0; left: -100%; width: 50%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transform: skewX(-20deg);
    transition: all 0.5s;
}
.btn-primary:hover::after {
    left: 150%;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-purple);
    box-shadow: var(--glow-primary);
}

.icon-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-light);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.icon-btn:hover {
    transform: scale(1.05);
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-cyan);
    box-shadow: var(--glow-cyan);
    color: var(--accent-cyan);
}

/* AVATARS */
.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.95rem;
    flex-shrink: 0;
    border: 2px solid var(--bg-main);
    box-shadow: var(--shadow-md);
}

.avatar-sm { width: 32px; height: 32px; font-size: 0.8rem; }
.avatar-lg { width: 56px; height: 56px; font-size: 1.25rem; }

/* CARDS */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: var(--radius-card);
    padding: var(--space-lg);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-light);
    transition: all 0.4s ease;
}

.card:hover {
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-5px);
    background: var(--bg-card-hover);
}

/* KANBAN BOARD */
.kanban-board {
    display: flex;
    gap: var(--space-lg);
    overflow-x: auto;
    padding-bottom: var(--space-md);
}

.kanban-column {
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-xl);
    padding: var(--space-md);
    min-width: 320px;
    flex: 1;
    border: 1px solid var(--border-light);
    backdrop-filter: blur(10px);
}

.column-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border-light);
}

.column-title {
    font-size: 0.95rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-primary);
    letter-spacing: 1px;
}

.task-count {
    background: rgba(99, 102, 241, 0.2);
    color: var(--accent-cyan);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 700;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

/* TASK CARD */
.task-card {
    background: var(--bg-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    margin-bottom: var(--space-md);
    border: 1px solid var(--border-light);
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.task-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 4px; height: 100%;
    background: var(--accent-purple);
    opacity: 0;
    transition: opacity 0.3s;
}

.task-card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    border-color: rgba(99, 102, 241, 0.4);
}

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

.task-assignee {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.assignee-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.task-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    line-height: 1.4;
}

/* PROGRESS BAR */
.progress {
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.3);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
    border-radius: 10px;
    transition: width 0.5s ease-out;
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* BADGES */
.badge {
    display: inline-flex;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.badge-primary {
    background: rgba(99, 102, 241, 0.15);
    color: var(--accent-cyan);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.notification-badge {
    position: absolute;
    top: 0;
    right: 0;
    width: 12px;
    height: 12px;
    background: var(--color-danger);
    border-radius: 50%;
    border: 2px solid var(--bg-main);
    box-shadow: 0 0 10px var(--color-danger);
}

/* FORMS */
.form-control {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-cyan);
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 0 0 4px rgba(6, 182, 212, 0.15);
}

/* SPINNER */
.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255,255,255,0.1);
    border-top-color: var(--accent-cyan);
    border-radius: 50%;
    animation: spin 1s cubic-bezier(0.68, -0.55, 0.265, 1.55) infinite;
}

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

/* UTILITIES */
.d-flex { display: flex; }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }
.justify-content-center { justify-content: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.w-100 { width: 100%; }

/* ANIMATION CLASSES */
.fade-in { animation: fadeIn 0.8s ease-out forwards; }
.slide-up { animation: slideUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards; }
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* GRID SYSTEM */
.container {
    width: 100%;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 calc(var(--space-md) * -0.5);
}

.col {
    flex: 1;
    padding: 0 calc(var(--space-md) * 0.5);
}

.grid { display: grid; gap: var(--space-lg); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* RESPONSIVE */
@media (max-width: 1024px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    .grid-4, .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .btn { padding: 10px 20px; font-size: 0.9rem; }
    .kanban-board { flex-direction: column; }
    .kanban-column { min-width: 100%; }
}

/* MudBlazor shared surfaces */
.glass-card {
    background: rgba(18, 18, 25, 0.6) !important;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px !important;
}

.stat-value {
    font-weight: 800 !important;
    line-height: 1.2;
}