:root {
    --primary: #00d67a;
    --primary-hover: #00ff8f;
    --primary-soft: rgba(0, 214, 122, 0.1);
    --danger: #ff4757;
    --danger-hover: #ff6b81;
    --success: #00d67a;
    --dark-bg: #0a0a0a;
    --card-bg: radial-gradient(circle at top, #181818 0%, #0a0a0a 55%, #000 100%);
    --border: rgba(255, 255, 255, 0.06);
    --text: #e5e5e5;
    --text-muted: #888;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: radial-gradient(circle at top left, #1a1a1a 0%, #0a0a0a 40%, #000 100%);
    color: var(--text);
    min-height: 100vh;
}

/* HEADER */
.header {
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo {
    height: 42px;
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
}

.brand-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.nav {
    display: flex;
    gap: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    border-radius: 10px;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text);
}

.nav-link.active {
    background: var(--primary-soft);
    color: var(--primary);
}

.nav-toggle {
    display: none;
}

.user-menu {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #00a86b);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    color: #000;
}

.user-info {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

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

.logout-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.75rem;
    cursor: pointer;
    padding: 0;
    transition: color 0.2s;
}

.logout-btn:hover {
    color: var(--danger);
}

/* MAIN CONTENT */
.main-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 40px 24px 80px;
}

.page-header {
    margin-bottom: 32px;
}

.page-header h1 {
    font-size: 2rem;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #fff, var(--primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-header p {
    color: var(--text-muted);
    font-size: 1rem;
}

/* SETTINGS CARD */
.settings-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 32px;
    margin-bottom: 24px;
}

.card-header {
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.card-header h2 {
    font-size: 1.3rem;
    margin-bottom: 6px;
    color: var(--text);
}

.card-subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* INFO GRID */
.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.info-item.full-width {
    grid-column: 1 / -1;
}

.info-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-value {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
}

.reflink-container {
    display: flex;
    gap: 12px;
}

.reflink-input {
    flex: 1;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--text);
    font-size: 0.9rem;
    font-family: 'Courier New', monospace;
}

.copy-btn {
    background: var(--primary-soft);
    border: 1px solid var(--primary);
    color: var(--primary);
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.copy-btn:hover {
    background: var(--primary);
    color: #000;
    transform: translateY(-1px);
}

/* FORMS */
.settings-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
}

.form-group input,
.form-group select {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 16px;
    color: var(--text);
    font-size: 0.95rem;
    outline: none;
    transition: all 0.2s;
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.05);
}

.form-group select {
    cursor: pointer;
}

.form-group select option {
    background: #0a0a0a;
    color: var(--text);
}

.form-group small {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* BUTTONS */
.btn-primary,
.btn-danger {
    padding: 14px 28px;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    align-self: flex-start;
}

.btn-primary {
    background: var(--primary);
    color: #000;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 214, 122, 0.3);
}

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

.btn-danger:hover {
    background: var(--danger-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 71, 87, 0.3);
}

.btn-primary:disabled,
.btn-danger:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ALERTS */
.alert {
    padding: 14px 18px;
    border-radius: 10px;
    font-size: 0.9rem;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success {
    background: rgba(0, 214, 122, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.alert-error {
    background: rgba(255, 71, 87, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
}

/* RESPONSIVE */
@media (max-width: 768px) {

    .info-grid,
    .form-row {
        grid-template-columns: 1fr;
    }

    .info-item.full-width {
        grid-column: 1;
    }

    .reflink-container {
        flex-direction: column;
    }


}

/* ==================== RESPONSIVE MÓVIL ==================== */
@media (max-width: 968px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    /* HAMBURGER MENU */
    .nav-toggle {
        display: block;
        background: none;
        border: none;
        color: var(--text);
        font-size: 1.5rem;
        cursor: pointer;
        padding: 5px;
    }

    .nav {
        display: none;
        /* Oculto por defecto en móvil */
        width: 100%;
        flex-direction: column;
        gap: 0.5rem;
        background: #0a0a0a;
        padding: 1rem;
        border-radius: 12px;
        border: 1px solid var(--border);
        margin-top: 1rem;
    }

    .nav.active {
        display: flex;
        /* Mostrar cuando está activo */
    }

    .header-content {
        flex-wrap: wrap;
        /* Permitir que el menú baje */
    }

    .nav-link {
        width: 100%;
        text-align: center;
        padding: 0.75rem;
        background: rgba(255, 255, 255, 0.05);
        border-radius: 8px;
        justify-content: center;
    }

    .user-menu {
        width: 100%;
        justify-content: space-between;
        padding-top: 1rem;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        display: none;
        /* Ocultar user menu inicialmente si se quiere dentro del toggle o dejar fuera */
    }

    /* Mostrar user menu siempre o adaptarlo */
    .user-menu {
        display: flex;
    }

    .settings-card {
        padding: 1.5rem 1rem;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 0.75rem 1rem;
    }

    .brand img {
        height: 28px;
    }

    .brand-title {
        font-size: 0.85rem;
    }

    .brand-subtitle {
        display: none;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    .page-header p {
        font-size: 0.9rem;
    }

    .nav-link .icon {
        font-size: 1.2rem;
    }

    .form-group input,
    .form-group select {
        font-size: 0.95rem;
    }

    .btn-primary,
    .btn-danger {
        width: 100%;
    }
}

/* ==================== AVATAR SECTION ==================== */
.avatar-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 24px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    border: 1px dashed var(--border);
}

.avatar-preview-container {
    position: relative;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    overflow: hidden;
    cursor: pointer;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    border: 3px solid var(--primary);
    transition: all 0.3s ease;
}

.avatar-preview-container:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 40px rgba(0, 214, 122, 0.3);
}

.avatar-preview {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 0.3s ease;
}

.avatar-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.avatar-preview-container:hover .avatar-overlay {
    opacity: 1;
}

.avatar-upload-btn {
    background: var(--primary);
    color: #000;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.avatar-upload-btn:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
}

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary);
}

.btn-danger-small {
    background: rgba(255, 71, 87, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

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

.avatar-hint {
    color: var(--text-muted);
    font-size: 0.8rem;
    text-align: center;
}

@media (max-width: 480px) {
    .avatar-section {
        padding: 16px;
    }

    .avatar-preview-container {
        width: 120px;
        height: 120px;
    }

    .avatar-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn-secondary,
    .btn-danger-small {
        width: 100%;
        text-align: center;
    }
}