/* Admin Panel Styles */
:root {
    --primary-gradient: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    --secondary-gradient: linear-gradient(135deg, #8b5cf6 0%, #7c3aed 100%);
    --dark-bg: #1a1a1a;
    --card-bg: #2a2a2a;
    --border-color: #333;
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Login Screen */
.login-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a1a 0%, #2a2a2a 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.login-container {
    background: var(--card-bg);
    border-radius: 20px;
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
    margin: 1rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo {
    width: 64px;
    height: 64px;
    margin: 0 auto 1rem;
    display: block;
}

.login-header h1 {
    font-size: 28px;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.login-header p {
    color: var(--text-secondary);
    font-size: 14px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.login-btn {
    width: 100%;
    padding: 14px;
    font-size: 16px;
    margin-top: 0.5rem;
}

.login-error {
    color: var(--danger-color);
    font-size: 14px;
    text-align: center;
    margin-top: 0.5rem;
    min-height: 20px;
}

.login-footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.back-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: color 0.3s ease;
}

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

.admin-container.hidden {
    display: none;
}

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

/* Header */
.admin-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.admin-logo {
    width: 32px;
    height: 32px;
}

.logo-section h1 {
    font-size: 24px;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-actions {
    display: flex;
    gap: 12px;
}

/* Buttons */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(251, 191, 36, 0.3);
}

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

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

.btn-success {
    background: var(--success-color);
    color: white;
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(16, 185, 129, 0.3);
}

.btn-danger {
    background: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(239, 68, 68, 0.3);
}

/* Navigation */
.admin-nav {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 0 2rem;
}

.nav-tabs {
    display: flex;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-tab {
    background: none;
    border: none;
    padding: 16px 24px;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.nav-tab.active {
    color: var(--text-primary);
    border-bottom-color: #fbbf24;
}

/* Main Content */
.admin-main {
    flex: 1;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.section-header h2 {
    font-size: 28px;
    font-weight: 700;
}

/* Items List */
.items-list {
    display: grid;
    gap: 1rem;
}

.item-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.item-card:hover {
    border-color: #fbbf24;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.item-header {
    display: flex;
    justify-content: between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.item-actions {
    display: flex;
    gap: 8px;
}

.btn-small {
    padding: 6px 12px;
    font-size: 12px;
}

/* Form Elements */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    background: var(--dark-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #fbbf24;
    box-shadow: 0 0 0 3px rgba(251, 191, 36, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

/* Settings */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.setting-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
}

.setting-card h3 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
}

/* Success Message */
.success-message {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--success-color);
    color: white;
    padding: 12px 20px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 1000;
}

.success-message.show {
    transform: translateX(0);
}

/* Responsive */
@media (max-width: 768px) {
    .admin-header {
        padding: 1rem;
    }

    .header-content {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }

    .admin-nav {
        padding: 0 1rem;
    }

    .nav-tabs {
        overflow-x: auto;
    }

    .admin-main {
        padding: 1rem;
    }

    .section-header {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    .settings-grid {
        grid-template-columns: 1fr;
    }
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.item-card {
    animation: fadeIn 0.3s ease-out;
}