:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --bg-dark: #0f172a;
    --card-dark: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --border: #334155;
    --glass: rgba(30, 41, 59, 0.7);
    --sidebar-width: 280px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, system-ui, sans-serif;
}

body {
    background: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow: hidden;
}

body.light {
    --bg-dark: #f8fafc;
    --card-dark: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --glass: rgba(255, 255, 255, 0.7);
}

.container {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--card-dark);
    border-right: 1px solid var(--border);
    padding: 2.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 50;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--primary);
    margin-bottom: 3rem;
    letter-spacing: -0.025em;
}

.logo-img {
    height: 32px;
    width: auto;
    object-fit: contain;
}

nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

nav ul li {
    padding: 0.875rem 1.25rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--text-muted);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 1rem;
}

nav ul li:hover {
    background: rgba(37, 99, 235, 0.1);
    color: var(--primary);
}

nav ul li.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.25);
}

.theme-toggle {
    margin-top: auto;
    padding-top: 2rem;
}

.theme-toggle button {
    width: 100%;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 0.75rem;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 3.5rem;
    max-width: 1400px;
    height: 100vh;
    overflow: hidden;
}

h1 {
    font-size: 2.75rem;
    font-weight: 800;
    margin-bottom: 2.5rem;
    letter-spacing: -0.05em;
    background: linear-gradient(to right, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
}

/* Dashboard Cards */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.card {
    background: var(--glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    padding: 2.5rem;
    border-radius: 24px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover {
    transform: translateY(-8px);
    border-color: var(--primary);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}

.card h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
    font-weight: 700;
}

.card p {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.025em;
}

/* Actions Card */
.actions-card {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.card-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.btn-refresh {
    background: #eab308 !important; /* Yellow */
    color: #000 !important;
    flex: 1;
    padding: 0.6rem !important;
    font-size: 0.9rem !important;
}

.btn-refresh:hover {
    background: #ca8a04 !important;
}

.btn-delete {
    background: #ef4444 !important; /* Red */
    color: #fff !important;
    flex: 1;
    padding: 0.6rem !important;
    font-size: 0.9rem !important;
}

.btn-delete:hover {
    background: #dc2626 !important;
}

/* Sections */
.section {
    display: none;
    animation: slideUp 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.section.active {
    display: block;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Forms & UI Elements */
.form-group {
    margin-bottom: 1.25rem;
    max-width: 500px;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Custom Dropdown Styling */
.custom-select-wrapper {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.custom-select {
    width: 100%;
    padding: 0.6rem 1rem;
    background: var(--card-dark);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-main);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s;
}

.custom-select:hover {
    border-color: var(--primary);
}

.custom-select-options {
    position: absolute;
    top: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--card-dark);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    display: none;
    z-index: 100;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(16px);
}

.custom-select-options.show {
    display: block;
    animation: slideDown 0.2s ease-out;
}

.custom-option {
    padding: 0.6rem 1rem;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.95rem;
}

.custom-option:hover {
    background: var(--primary);
    color: white;
}

.custom-text-input {
    width: 100%;
    padding: 0.6rem 1rem;
    background: var(--card-dark);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-main);
    font-size: 0.95rem;
    font-weight: 500;
    outline: none;
    transition: all 0.2s;
}

.custom-text-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.custom-text-input::placeholder {
    color: var(--text-muted);
    opacity: 0.6;
}

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

select:focus, input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.btn {
    background: var(--primary);
    color: white;
    padding: 0.8rem 1.5rem;
    border: none;
    border-radius: 10px;
    font-weight: 700;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 6px -1px rgba(37, 99, 235, 0.2), 0 2px 4px -1px rgba(37, 99, 235, 0.1);
    max-width: 500px;
}

.btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.3);
}

.progress {
    height: 12px;
    background: var(--border);
    border-radius: 6px;
    margin: 2rem 0;
    overflow: hidden;
    max-width: 500px;
}

#progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    width: 0%;
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Export Grid */
.export-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.export-buttons button {
    background: var(--card-dark);
    border: 1px solid var(--border);
    color: var(--text-main);
    padding: 1.5rem 2rem;
    border-radius: 20px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    flex: 1;
    min-width: 160px;
}

.export-buttons button .download-icon {
    font-size: 1.25rem;
    background: var(--primary);
    color: white;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin-top: 0.5rem;
}

@media (max-width: 768px) {
    .export-buttons {
        flex-direction: column;
        align-items: center;
    }
    .export-buttons button {
        width: 100%;
        max-width: 300px;
    }
}

.export-buttons button:hover {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
    transform: translateY(-4px);
}

/* Custom Toast */
.toast-notification {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--card-dark);
    color: var(--text-main);
    padding: 0.75rem 1.25rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
    font-size: 0.9rem;
    font-weight: 600;
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.toast-notification.show {
    transform: translateY(0);
    opacity: 1;
}

/* Custom Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1100;
}

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

.modal {
    background: var(--card-dark);
    border: 1px solid var(--border);
    padding: 1.5rem;
    border-radius: 16px;
    width: 90%;
    max-width: 320px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: modalPop 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes modalPop {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

.modal h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--text-main);
}

.modal p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    line-height: 1.4;
}

.modal-actions {
    display: flex;
    gap: 0.75rem;
}

.modal-btn {
    flex: 1;
    padding: 0.6rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-main);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.modal-btn:hover {
    background: var(--border);
}

.modal-btn-danger {
    background: #ef4444;
    border-color: #ef4444;
    color: white;
}

.modal-btn-danger:hover {
    background: #dc2626;
    border-color: #dc2626;
}

/* Mobile Theme Toggle */
.mobile-theme-btn {
    display: none;
    position: fixed;
    bottom: 24px;
    left: 24px;
    width: 44px;
    height: 44px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.4);
    z-index: 900;
    align-items: center;
    justify-content: center;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 0;
    line-height: 1;
}

.mobile-theme-btn:hover {
    transform: scale(1.1);
}

.mobile-theme-btn:active {
    transform: scale(0.95);
}

/* Footer */
.footer {
    position: fixed;
    bottom: 20px;
    left: calc(var(--sidebar-width) / 2 + 50%);
    transform: translateX(-50%);
    z-index: 100;
}

.footer p {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
}

.footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 700;
    transition: color 0.2s;
}

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

@media (max-width: 1024px) {
    .footer {
        left: calc(var(--sidebar-width) / 2 + 50%);
    }
}

@media (max-width: 768px) {
    .footer {
        left: 50%;
        bottom: 30px; /* Lowered on mobile */
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 80px;
    }
    .sidebar {
        padding: 2rem 1rem;
    }
    .logo span {
        display: none;
    }
    nav ul li span {
        display: none;
    }
    nav ul li {
        justify-content: center;
        padding: 1rem;
    }
}

@media (max-width: 768px) {
    :root {
        --sidebar-width: 0px;
    }
    .container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        padding: 1.5rem;
        border-right: none;
        border-bottom: 1px solid var(--border);
    }
    .logo {
        margin-bottom: 1rem;
    }
    .logo span {
        display: inline;
    }
    nav ul {
        flex-direction: row;
        overflow-x: hidden;
        justify-content: space-around;
        padding-bottom: 0.5rem;
    }
    nav ul li .icon {
        display: none;
    }
    nav ul li {
        white-space: nowrap;
        padding: 0.6rem 1rem;
    }
    nav ul li span {
        display: inline;
    }
    .main-content {
        margin-left: 0;
        padding: 2rem 1.5rem;
    }
    h1 {
        font-size: 2rem;
    }
    .card {
        padding: 1.5rem;
    }
    .card p {
        font-size: 2rem;
    }
    .theme-toggle {
        display: none;
    }
    .mobile-theme-btn {
        display: flex;
    }
}