:root {
    --bg-color: #0d1117;
    --surface-color: rgba(22, 27, 34, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #8b949e;
    --accent-color: #58a6ff;
    --accent-hover: #3182ce;
    --danger-color: #f85149;
    --success-color: #2ea043;
    --info-color: #a371f7;
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --glass-blur: blur(16px);
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    background-image: radial-gradient(circle at top right, rgba(88, 166, 255, 0.1), transparent 40%),
        radial-gradient(circle at bottom left, rgba(46, 160, 67, 0.05), transparent 40%);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
    font-weight: 600;
    line-height: 1.2;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

button {
    cursor: pointer;
    font-family: inherit;
}

.glass-panel {
    background: var(--surface-color);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

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

/* =========================================
   LOGIN PAGE STYLES
   ========================================= */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
}

.login-card {
    width: 100%;
    max-width: 440px;
    padding: 3rem 2.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), #2ea043);
}

.login-logo {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff, #8b949e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -1px;
}

.login-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-group.half {
    flex: 1;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-control {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.85rem 1rem;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    resize: vertical;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.2);
}

.form-control option {
    background: var(--bg-color);
    color: var(--text-primary);
}

.btn-primary {
    width: 100%;
    background: var(--accent-color);
    color: #fff;
    border: none;
    padding: 1rem;
    border-radius: 8px;
    font-size: 1rem;
    margin-top: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
    font-weight: 600;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(88, 166, 255, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.error-message {
    color: var(--danger-color);
    font-size: 0.9rem;
    margin-top: 1rem;
    display: none;
    animation: shake 0.5s;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    25% {
        transform: translateX(-5px);
    }

    50% {
        transform: translateX(5px);
    }

    75% {
        transform: translateX(-5px);
    }
}

.badge-pro {
    display: inline-block;
    background: rgba(46, 160, 67, 0.15);
    color: var(--success-color);
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(46, 160, 67, 0.3);
}

/* =========================================
   MARKETPLACE MAIN APP
   ========================================= */

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    border-radius: 0;
    border-top: none;
    border-left: none;
    border-right: none;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-brand .logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #fff, #58a6ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.badge-pro-small {
    background: var(--success-color);
    color: #fff;
    font-size: 0.65rem;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-weight: 800;
}

.search-bar {
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 99px;
    padding: 0.25rem 0.5rem 0.25rem 1.25rem;
    width: 400px;
    transition: border-color 0.3s;
}

.search-bar:focus-within {
    border-color: var(--accent-color);
}

.search-input {
    background: none;
    border: none;
    color: var(--text-primary);
    outline: none;
    flex: 1;
    font-size: 0.95rem;
}

.search-input::placeholder {
    color: var(--text-secondary);
}

.search-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s;
}

.search-btn:hover {
    color: var(--accent-color);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.btn-accent {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--accent-color);
    color: #fff;
    border: none;
    padding: 0.6rem 1.25rem;
    border-radius: 99px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s;
    box-shadow: 0 2px 8px rgba(88, 166, 255, 0.3);
}

.btn-accent:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid transparent;
    padding: 0.6rem 1rem;
    border-radius: 99px;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-ghost:hover {
    color: var(--danger-color);
    background: rgba(248, 81, 73, 0.1);
}

/* Main Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

/* Hero Section */
.hero-section {
    padding: 3rem 0;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #fff, #8b949e);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Filters Section */
.filters-section {
    margin-bottom: 3rem;
}

.categories {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.category-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.75rem 1.5rem;
    border-radius: 99px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.category-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.category-btn.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
    box-shadow: 0 4px 12px rgba(88, 166, 255, 0.25);
}

.condition-filters {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.custom-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.95rem;
    user-select: none;
}

.custom-checkbox input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    height: 18px;
    width: 18px;
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    position: relative;
    transition: all 0.2s;
}

.custom-checkbox:hover input~.checkmark {
    background-color: rgba(255, 255, 255, 0.2);
}

.custom-checkbox input:checked~.checkmark {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
    left: 5px;
    top: 1px;
    width: 4px;
    height: 9px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.custom-checkbox input:checked~.checkmark:after {
    display: block;
}

/* Parts Grid */
.parts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.part-card {
    background: rgba(22, 27, 34, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    position: relative;
}

.part-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.4);
    border-color: rgba(88, 166, 255, 0.3);
}

.part-image {
    height: 180px;
    width: 100%;
    object-fit: cover;
    background: #161b22;
    position: relative;
}

.badges-container {
    position: absolute;
    top: 10px;
    left: 10px;
    display: flex;
    gap: 0.5rem;
}

.badge {
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge.nuovo {
    background: rgba(46, 160, 67, 0.9);
    color: #fff;
}

.badge.usato {
    background: rgba(163, 113, 247, 0.9);
    color: #fff;
}

.badge.categoria {
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.part-content {
    padding: 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.part-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #fff;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.part-price {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--accent-color);
    margin-bottom: 1rem;
}

.part-seller {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.seller-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1f6feb, #2ea043);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    color: #fff;
}

.seller-info {
    flex: 1;
}

.seller-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    display: block;
}

.seller-role {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: block;
}

/* Item Actions for Owner */
.owner-actions {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 0.5rem;
    z-index: 10;
}

.btn-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    color: #fff;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

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

.btn-icon.sold-btn:hover {
    background: rgba(46, 160, 67, 0.8);
    border-color: var(--success-color);
}

.btn-icon.delete-btn:hover {
    background: rgba(248, 81, 73, 0.8);
    border-color: var(--danger-color);
}

/* Sold State */
.part-card.is-sold {
    opacity: 0.7;
}

.part-card.is-sold .part-image {
    filter: grayscale(100%);
}

.sold-stamp {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-15deg);
    background: rgba(248, 81, 73, 0.9);
    color: #fff;
    font-size: 1.5rem;
    font-weight: 800;
    padding: 0.5rem 1.5rem;
    border: 3px solid #fff;
    border-radius: 8px;
    text-transform: uppercase;
    letter-spacing: 2px;
    z-index: 5;
    pointer-events: none;
}

/* Modal "Vendi" */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    padding: 2rem;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-content {
    width: 100%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    background: var(--bg-color);
}

/* Admin Users List */
.user-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: background 0.2s;
}

.user-row:hover {
    background: rgba(255, 255, 255, 0.02);
}

.user-details {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.user-name {
    font-weight: 600;
    color: var(--text-primary);
}

.user-email {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.admin-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-small {
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    border: none;
    color: #fff;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-block {
    background: rgba(248, 81, 73, 0.2);
    color: var(--danger-color);
    border: 1px solid rgba(248, 81, 73, 0.3);
}

.btn-block:hover {
    background: var(--danger-color);
    color: #fff;
}

.btn-unblock {
    background: rgba(46, 160, 67, 0.2);
    color: var(--success-color);
    border: 1px solid rgba(46, 160, 67, 0.3);
}

.btn-unblock:hover {
    background: var(--success-color);
    color: #fff;
}

/* Override glass-panel bg for solid read */
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.25rem;
}

.close-modal {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    line-height: 1;
    border-radius: 4px;
    padding: 0.25rem;
    margin: -0.25rem;
    transition: all 0.2s;
}

.close-modal:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.modal-body {
    padding: 1.5rem;
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
    transition: border-color 0.2s;
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.upload-area svg {
    margin-bottom: 0.5rem;
}

/* ==========================================================================
   Chat / Messaging System
   ========================================================================== */

.unread-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--danger-color);
    color: white;
    font-size: 0.7rem;
    font-weight: 800;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--bg-color);
}

.chat-container {
    display: flex;
    flex: 1;
    overflow: hidden;
    /* prevents modal body scroll */
}

.chat-sidebar {
    width: 35%;
    border-right: 1px solid var(--border-color);
    background: rgba(0, 0, 0, 0.2);
    overflow-y: auto;
}

.chat-item {
    display: flex;
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    cursor: pointer;
    transition: background 0.2s;
}

.chat-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.chat-item.active {
    background: rgba(255, 255, 255, 0.1);
    border-left: 3px solid var(--accent-color);
}

.chat-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.25rem;
}

.chat-part-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-time {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.chat-last-msg {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-last-msg.unread {
    color: var(--text-primary);
    font-weight: 600;
}

.chat-main {
    width: 65%;
    display: flex;
    flex-direction: column;
    background: rgba(0, 0, 0, 0.1);
}

.chat-placeholder {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    gap: 1rem;
}

.chat-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
}

.chat-header h4 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.chat-header small {
    color: var(--accent-color);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.chat-bubble {
    max-width: 80%;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    font-size: 0.95rem;
    line-height: 1.4;
    position: relative;
    word-break: break-word;
    /* Ensure long text doesn't flow out */
}

.chat-bubble.received {
    align-self: flex-start;
    background: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-bottom-left-radius: 4px;
}

.chat-bubble.sent {
    align-self: flex-end;
    background: var(--accent-color);
    color: #fff;
    border-bottom-right-radius: 4px;
}

.chat-timestamp {
    display: block;
    font-size: 0.65rem;
    margin-top: 0.25rem;
    opacity: 0.7;
    text-align: right;
}

.chat-input-area {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    gap: 0.5rem;
    background: rgba(0, 0, 0, 0.2);
}

.chat-input-area .form-control {
    flex: 1;
    margin-bottom: 0;
    border-radius: 20px;
    padding: 0.8rem 1.2rem;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }

    .search-bar {
        width: 100%;
    }

    .nav-actions {
        width: 100%;
        justify-content: space-between;
    }

    .btn-accent {
        flex: 1;
        justify-content: center;
    }

    .modal-content {
        margin: 1rem;
        max-height: 95vh;
    }

    /* Stack chat layout on mobile */
    .chat-container {
        flex-direction: column;
    }

    .chat-sidebar {
        width: 100%;
        max-height: 30vh;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .chat-main {
        width: 100%;
        flex: 1;
        /* Pushes input area to the bottom */
    }
}