:root {
    --color-primary: #3ea6ff;
    --color-secondary: #065fd4;
    --color-accent: #ff6b6b;
    --color-success: #51cf66;
    --color-warning: #ffd93d;
    --color-info: #74c0fc;
    --color-bg-primary: #0a0e27;
    --color-bg-secondary: #131829;
    --color-bg-tertiary: #1a1f3a;
    --color-bg-hover: #252d4a;
    --color-text-primary: #ffffff;
    --color-text-secondary: #b0bac9;
    --color-border: #1e2749;
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 80px;
    --navbar-height: 60px;
}

::-webkit-scrollbar {
    width: 8px;
}

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

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

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

/* Dashboard Layout */
* {
    box-sizing: border-box;
}

html, body {
    height: 100%;
    margin: 0;
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Login Screen */
.login-screen {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-tertiary) 100%);
}
.login-container {
    text-align: center;
    padding: 40px;
}
.login-icon {
    font-size: 80px;
    margin-bottom: 16px;
    animation: bounce 2s ease-in-out infinite;
}
@keyframes bounce { 0%, 100% { transform: translateY(0) } 50% { transform: translateY(-10px) } }
.login-container h1 {
    margin: 0 0 8px;
    color: var(--color-primary);
    font-size: 28px;
}
.login-container p {
    margin: 0 0 24px;
    color: var(--color-text-secondary);
}

.header {
    height: var(--navbar-height);
    display: flex;
    align-items: center;
    padding: 0 24px;
    gap: 12px;
    border-bottom: 1px solid var(--color-border);
    background: linear-gradient(90deg, rgba(62,166,255,0.02), rgba(6,95,212,0.01));
}

.sidebar {
    width: var(--sidebar-width);
    height: calc(100vh - var(--navbar-height));
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border);
    padding: 20px 12px;
    position: relative;
    overflow-y: auto;
    animation: slideInLeft 300ms ease;
}

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

.sidebar-nav { display: flex; flex-direction: column; gap: 4px }
.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: all 180ms ease;
    cursor: pointer;
}
.nav-item:hover {
    background: var(--color-bg-hover);
    color: var(--color-primary);
    padding-left: 16px;
}
.nav-item.active {
    background: linear-gradient(90deg, rgba(62,166,255,0.15), rgba(6,95,212,0.1));
    color: var(--color-primary);
    border-left: 3px solid var(--color-primary);
    padding-left: 14px;
}
.nav-item svg {
    stroke: currentColor;
    flex-shrink: 0;
}

.content-padding {
    padding: 24px;
}

/* Buttons */
.btn {
    background: var(--color-primary);
    color: #001;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 13px;
    transition: all 160ms ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(62,166,255,0.2); }

.btn-large {
    padding: 12px 32px;
    font-size: 14px;
}

.btn-primary { background: var(--color-primary); }
.btn-danger { background: var(--color-accent); }
.btn-success { background: var(--color-success); }

.btn-ghost {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
}
.btn-ghost:hover { background: var(--color-bg-hover); }

.icon-button {
    background: transparent;
    border: 1px solid var(--color-border);
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    color: var(--color-primary);
    cursor: pointer;
    transition: all 160ms ease;
}
.icon-button:hover {
    background: var(--color-bg-hover);
    border-color: var(--color-primary);
}
.icon-button svg {
    stroke: currentColor;
}

.user-badge {
    display: inline-flex;
    gap: 8px;
    align-items: center;
    padding: 6px 12px;
    background: linear-gradient(90deg, rgba(62,166,255,0.1), rgba(6,95,212,0.05));
    border: 1px solid var(--color-primary);
    border-radius: 20px;
    color: var(--color-primary);
    font-size: 13px;
}

.user-badge img {
    width: 28px;
    height: 28px;
    border-radius: 50%;
}

/* Card Grid */
.card {
    background: linear-gradient(135deg, rgba(62,166,255,0.02), rgba(6,95,212,0.01));
    border: 1px solid var(--color-border);
    padding: 20px;
    border-radius: 10px;
    transition: all 180ms ease;
}
.card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 24px rgba(62,166,255,0.1);
}

.card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin: 0 0 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.card-stat {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-primary);
    margin: 0;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

/* Item Cards */
.item-card {
    background: linear-gradient(135deg, rgba(62,166,255,0.04), rgba(6,95,212,0.02));
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 16px;
    transition: all 180ms ease;
    animation: fadeIn 260ms ease both;
}
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px) } to { opacity: 1; transform: translateY(0) } }
.item-card:hover {
    background: var(--color-bg-hover);
    border-color: var(--color-primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(62,166,255,0.15);
}

.item-title {
    font-weight: 600;
    margin: 0 0 8px;
    color: var(--color-primary);
}
.item-meta {
    font-size: 12px;
    color: var(--color-text-secondary);
    margin: 0 0 12px;
}
.item-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* Action Buttons */
.action-btn {
    flex: 1;
    min-width: 80px;
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    background: var(--color-bg-hover);
    color: var(--color-text-primary);
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    transition: all 140ms ease;
}
.action-btn:hover {
    background: var(--color-primary);
    color: #001;
    border-color: var(--color-primary);
}
.action-btn.danger {
    color: var(--color-accent);
    border-color: var(--color-accent);
}
.action-btn.danger:hover {
    background: var(--color-accent);
    color: white;
}
.action-btn.success {
    color: var(--color-success);
    border-color: var(--color-success);
}
.action-btn.success:hover {
    background: var(--color-success);
    color: white;
}

@media (max-width: 1024px) {
    .sidebar { width: var(--sidebar-collapsed-width); }
    .nav-item span { display: none; }
    .nav-item { justify-content: center; }
}